# SellerVault — Full Content Corpus

> All-in-one Amazon FBA toolkit for inventory management, automated repricing, reimbursement recovery, scanning, and profitability analytics. Built by an 8-figure seller managing 30,000+ SKUs. Built by an 8-figure Amazon seller managing 30,000+ SKUs. US marketplace (amazon.com).

This is the full-content export for AI/LLM ingestion. SellerVault is an all-in-one Amazon FBA seller platform covering inventory & restock planning, automated repricing, reimbursement recovery, profitability analytics, product scanning, and FBA shipment workflows. Reimbursement claims are filed manually through Amazon Seller Central (TOS-compliant) — never via bots or scraping.

Canonical site: https://sellervault.io/  ·  Link index: https://sellervault.io/llms.txt  ·  Sitemap: https://sellervault.io/sitemap.xml

---

## Amazon Seller Glossary (74 terms)

### A-to-z Guarantee Claim (also: A-to-z Guarantee, A-to-Z Claim)
The A-to-z Guarantee protects buyers on seller-fulfilled (FBM) and some third-party orders. A buyer files a claim when an item never arrives, arrives materially different from the listing, or the seller will not accept a valid return. Amazon investigates and, if it sides with the buyer, refunds them — typically debiting the seller's account.

A-to-z claims are distinct from chargebacks (which go through the buyer's bank/card network) and from SAFE-T claims (the seller-initiated path to recover money Amazon refunded under the returns policy). For FBA orders, Amazon handles customer service and returns directly, so A-to-z claims against FBA sellers are rare.

Every granted A-to-z claim where Amazon finds the seller at fault counts against the Order Defect Rate (ODR). Keeping ODR under 1% is required for account health, so unresolved claims are an account-health risk, not just a refund cost.

Example: An FBM buyer's package is marked delivered but never arrives. The seller declines to refund, so the buyer files an A-to-z claim. Amazon refunds the buyer $42, debits the seller, and the claim is logged against the seller's ODR.
Source: https://sellervault.io/glossary/a-to-z-claim

### A+ Content (also: A Plus Content, Enhanced Brand Content, EBC)
A+ Content (formerly Enhanced Brand Content) lets brand-registered sellers replace the standard plain-text product description with a layout of image banners, formatted text blocks, comparison charts, and FAQ modules. It renders in the "From the manufacturer" / "Product description" section of the listing.

Amazon reports that A+ Content can increase conversion by helping shoppers understand the product and reducing returns from mismatched expectations. Basic A+ Content is free to eligible brands; Premium A+ (A++) adds video, interactive modules, and larger images and is offered to qualifying brands at no cost.

A+ Content text is NOT indexed for search, so it does not directly affect keyword ranking — its value is conversion and brand storytelling, not discoverability. Use backend keywords and the title/bullets for indexing instead.

Example: A brand adds a comparison chart A+ module showing its 32oz, 24oz, and 16oz bottle variations side by side, plus a lifestyle banner. Conversion rate on the listing rises from 11% to 14% over the following month.
Source: https://sellervault.io/glossary/a-plus-content

### Account Health
Account Health is the umbrella metric Amazon uses to evaluate whether a seller account meets their performance standards. The Account Health Dashboard in Seller Central tracks Order Defect Rate (ODR), Cancellation Rate, Late Shipment Rate, On-Time Delivery Rate, Valid Tracking Rate, and a separate Policy Compliance section covering intellectual property complaints, product authenticity, listing policy violations, and restricted product violations.

Each metric has a target threshold. Falling below threshold on any single metric won't immediately suspend you, but multiple breaches or a severe single incident can trigger a "Plan of Action" request — and ignoring that can lead to suspension.

For FBA sellers, most performance metrics are largely outside your direct control because Amazon handles fulfillment. The metrics that DO matter are policy compliance (which is on you to monitor) and the Cancellation Rate (which spikes when you go out of stock on FBM listings). For VAs and agencies managing client accounts, weekly Account Health review is non-negotiable.
Source: https://sellervault.io/glossary/account-health

### ACoS (also: Advertising Cost of Sale, Advertising Cost of Sales)
ACoS (Advertising Cost of Sale) measures the efficiency of an Amazon PPC campaign as a percentage. The formula is `ACoS = Ad Spend / Ad-Attributed Sales × 100`. A 25% ACoS means you spent $0.25 to generate $1 of ad-attributed revenue.

ACoS is the default Amazon Ads dashboard metric and the easiest to optimize against, but it has a critical limitation: it only counts revenue Amazon attributes to your ads, ignoring the organic lift advertising creates. Two campaigns with identical ACoS can have very different impacts on overall business profitability. That's why serious sellers track TACoS (Total Advertising Cost of Sale) alongside ACoS.

Target ACoS depends on your unit margin. If a product has 40% margin after fees and COGS, your break-even ACoS is 40%. Anything below that is profitable on the ad-attributed revenue alone. Above that, you're losing money on each ad-attributed sale and need TACoS-level analysis to know whether the campaign is still net positive.

Example: A SKU sells for $30 with $12 unit margin. The PPC campaign spent $300 last month and Amazon attributed $1,500 in sales to it. ACoS = 300 / 1500 = 20%. Net contribution: $600 margin from ad sales − $300 spend = $300 profit.
Source: https://sellervault.io/glossary/acos

### Aged Inventory Surcharge
The Aged Inventory Surcharge is a monthly fee Amazon charges on top of standard storage fees for FBA units that have been stored for 181+ days without selling. The surcharge escalates with age: small at 181-270 days, larger at 271-365 days, and substantial at 365+ days, where the Long-Term Storage Fee also kicks in.

The purpose is to incentivize sellers to clear slow-moving inventory instead of letting it occupy warehouse space indefinitely. Combined with the standard Q4 storage surcharge, aged inventory can cost more in storage fees than the unit's gross profit margin — silently turning slow movers into net losses.

The defensive playbook: identify aged inventory monthly via the FBA Inventory Age Report, take aggressive markdowns or removal orders on units approaching 180 days, and re-evaluate whether the SKU should remain in FBA at all. SellerVault's inventory dashboard projects aged inventory cost forward so you can see the future fee impact of decisions you make today.
Source: https://sellervault.io/glossary/aged-inventory-surcharge

### Amazon Brand Registry (also: Brand Registry, ABR)
Amazon Brand Registry requires an active registered or pending trademark (a text or image mark registered with a national trademark office, or a pending mark via Amazon's IP Accelerator). Once enrolled, the brand owner gains control over their listings and access to features locked to unregistered sellers.

Key benefits include A+ Content, Sponsored Brands and Sponsored Display advertising, a custom Brand Store, Brand Analytics (search-term and demographic data), and enhanced anti-counterfeit tooling — Report a Violation, Transparency, and Project Zero — to fight hijackers and counterfeiters.

Brand Registry is the foundation of a private-label business on Amazon: without it, you cannot run Sponsored Brands ads, publish A+ Content, or efficiently remove unauthorized sellers and counterfeit listings from your ASINs.

Example: A private-label seller registers their trademarked brand "NorthPeak" in Brand Registry, then uses the Report a Violation tool to remove three counterfeit sellers from their ASIN and launches A+ Content and a Sponsored Brands campaign.
Source: https://sellervault.io/glossary/brand-registry

### ASIN (also: Amazon Standard Identification Number)
ASIN (Amazon Standard Identification Number) is the 10-character alphanumeric identifier Amazon assigns to every product in its catalog. It's the primary key for every product, listing, review, and report. You can find an ASIN in any product URL after the `/dp/` segment: `https://www.amazon.com/dp/B07X7DJ8WK` → ASIN is `B07X7DJ8WK`.

For books, the ASIN is the same as the ISBN-10. For other products, Amazon generates the ASIN when the listing is first created. A single product can have multiple ASINs across marketplaces (US, UK, DE, JP all assign their own), and variations of the same product (different size or color) each have their own ASIN under a parent ASIN.

Don't confuse ASIN with FNSKU or UPC. ASIN identifies the LISTING. UPC identifies the manufacturer's product. FNSKU identifies a specific SKU within YOUR Amazon FBA inventory — same ASIN, different sellers, different FNSKUs.
Source: https://sellervault.io/glossary/asin

### AWD (also: Amazon Warehousing & Distribution)
AWD (Amazon Warehousing & Distribution) is Amazon's bulk-storage offering for sellers who need to receive container-level inventory but don't want to send it all to FBA at once. You ship to an AWD facility in pallet or container quantities. AWD then auto-replenishes your FBA inventory based on velocity, capacity limits, and replenishment thresholds you configure.

The practical value: AWD storage is materially cheaper than FBA storage, especially during the Q4 surcharge window, and it sidesteps the inbound placement fee structure that hits sellers shipping directly to multiple FCs. It's designed for sellers with high-volume catalogs that would otherwise be stuck choosing between paying high FBA storage or pushing inventory through 3PLs.

Limitations: AWD doesn't cover every category, ramp-up time on new SKUs can be slow, and replenishment latency can leave you with FBA stockouts if you under-configure thresholds. SellerVault's placement fee intelligence accounts for AWD as one of three placement strategies (AWD, standard inbound, paid placements) when calculating restock cost.
Source: https://sellervault.io/glossary/awd

### Backend Keywords (also: Search Terms, Hidden Keywords)
Backend keywords live in the "Search Terms" field of the listing's Keywords section in Seller Central. They are not visible to shoppers but are indexed by Amazon's search engine, letting you capture synonyms, misspellings, alternate spellings, and use-case terms that would clutter the title or bullets.

Amazon caps the Search Terms field at 250 bytes per listing; anything beyond the limit is ignored. Best practices: no commas needed (spaces separate terms), do not repeat words already in your title/bullets (redundant indexing), avoid competitor brand names and ASINs (a policy violation), and skip subjective claims like "best" or "cheap."

Backend keywords contribute to whether a listing is indexed for a search term but are a weak ranking signal compared with title placement, sales velocity, and conversion. Treat them as coverage for the long tail, not a ranking lever.

Example: A stainless steel water bottle listing whose title says "Insulated Water Bottle" adds backend terms like "flask thermos tumbler hydro canteen 32oz leakproof" to capture searches it would otherwise miss — staying under the 250-byte limit.
Source: https://sellervault.io/glossary/backend-keywords

### BSR (also: Best Seller Rank, Sales Rank)
BSR (Best Seller Rank, sometimes "Sales Rank") is the ranking Amazon assigns to every product within its main category and any sub-categories it belongs to. BSR #1 means it's the top-selling item in that category. BSR is updated continuously based on recent sales velocity, weighted toward the most recent hour but smoothed over a longer window to prevent extreme oscillation.

Why sellers care: BSR is a direct proxy for sales velocity. Sourcing tools like SellerAmp, Keepa, and SellerVault's product scanner use BSR (alongside historical price and BSR trend data) to estimate monthly sales for products you're considering buying. A product with stable BSR in the top 1% of its category is selling consistently; one bouncing between top 10% and top 50% is unstable.

BSR is category-relative. A BSR of 5,000 in Books (which has millions of products) is much higher velocity than a BSR of 5,000 in Patio Furniture (which has thousands). Always look at BSR alongside the category size and the historical BSR trend, not the absolute number alone.
Source: https://sellervault.io/glossary/bsr

### Buy Box (also: Featured Offer)
The Buy Box (officially renamed "Featured Offer" in 2023, though everyone still says Buy Box) is the box on the right side of an Amazon product detail page that contains the "Buy Now" and "Add to Cart" buttons. Whichever seller is featured in the Buy Box at the moment a customer clicks gets the sale by default. ~85% of all Amazon purchases happen via the Buy Box.

Multiple sellers can offer the same product, but Amazon only puts one in the Buy Box at any moment. Amazon's Buy Box algorithm rotates featured sellers based on price, fulfillment channel (FBA gets a heavy boost), seller feedback rating, in-stock status, shipping speed, and a few other factors. The exact weights are proprietary and they change.

For sellers, Buy Box win rate is the single most important commercial metric. Repricing software exists almost entirely to win and hold the Buy Box without cratering margin. SellerVault's repricer factors in Buy Box probability, fulfillment channel matching, competitor seller quality, and TACoS pressure to make Buy-Box-aware decisions instead of dumb price matching.

Example: You and three other FBA sellers offer the same ASIN at $24.99. All four match price exactly. Amazon will rotate the Buy Box across all four sellers based on inventory health, feedback rating, and historical Buy Box hold time. A higher-feedback seller with healthier inventory may hold the Buy Box 60% of the time even at the same price.
Source: https://sellervault.io/glossary/buy-box

### Capacity Limits
Capacity Limits (formerly "Storage Limits") are the cap Amazon places on the cubic feet of FBA storage your account can use. Each seller gets a monthly limit set 2-4 weeks before the start of the month, based on a combination of historical sales velocity, IPI score, and Amazon's overall warehouse capacity. The limit is broken down by storage type (standard, oversized, apparel, footwear, etc.).

When you exceed your capacity limit, Amazon stops accepting new inbound shipments for the over-limit category until you sell down or pay for additional capacity through the Capacity Manager auction. Persistently low IPI scores reduce your limit; consistent high velocity raises it.

For large catalogs, capacity limits are the single biggest constraint on restock planning. SellerVault's restock engine factors in remaining capacity per storage type and warns before recommendations would push you over the limit. Manual restock planning without capacity awareness regularly leads to canceled inbound shipments.
Source: https://sellervault.io/glossary/capacity-limits

### Case Pack (also: Master Carton, Inner Pack)
Case Pack is the standard quantity of a SKU that comes packaged together from a manufacturer or distributor. A 24-count case pack means the supplier ships in cases of 24 units; you cannot order 23 or 25, only multiples of 24. For wholesale sellers, every restock decision must respect case-pack constraints.

Wholesale workflows that ignore case packs end up with chaotic restock recommendations like "ship 47 units" — which gets rounded by hand to 48 and creates unnecessary friction every restock cycle. Worse, when you stack discount tiers with case packs ("buy 10 cases of 24 for 5% off"), naive software produces nonsensical numbers.

SellerVault's restock engine accepts a case pack value per SKU (or a default per supplier) and constrains every recommendation to a multiple of it. Forecasts scale up or down to the nearest valid case-pack quantity instead of producing fractional outputs. This single feature saves wholesale operations 20-40 minutes per restock cycle.
Source: https://sellervault.io/glossary/case-pack

### COGS (also: Cost of Goods Sold)
COGS (Cost of Goods Sold) is the total cost of acquiring inventory and getting it ready to sell. For an Amazon seller, accurate COGS includes the supplier invoice price, inbound freight to your warehouse (or directly to Amazon), import duties, prep center fees, customs broker fees, and any unit-level inspection or labeling costs.

The most common mistake new sellers make is using only the invoice cost as COGS. This understates true cost by 5-25% depending on the supply chain, which then overstates profit and ROI. Decisions made on understated COGS lead to repricing floors that are too low and PPC bids that are too high — both of which silently bleed margin.

SellerVault's cost profiles let you layer all these components per SKU or per supplier so the profit calculations on every dashboard and the floor prices in the repricer reflect TRUE landed cost. If you're tracking COGS in a spreadsheet today, your reported margins are almost certainly wrong by enough to matter.
Source: https://sellervault.io/glossary/cogs

### Conversion Rate (also: CR, CVR, Unit Session Percentage)
Conversion rate measures how effectively a listing turns traffic into sales. Amazon's Business Reports express it as Unit Session Percentage: `Units Ordered / Sessions × 100`, where a session is a unique visit to your listing within a 24-hour window.

A healthy Amazon conversion rate is typically in the 10–15% range — far higher than a general e-commerce site (1–3%) because Amazon shoppers arrive with high purchase intent. Conversion is driven by price, review count and rating, main image quality, Prime/FBA eligibility, in-stock status, and the title/bullets/A+ Content.

Conversion rate is also a major ranking input: listings that convert well from a given search term rise in organic rank for that term, which compounds traffic. This is why fixing conversion (price, images, reviews) often beats buying more ad traffic.

Example: A listing had 2,000 sessions last month and 240 units ordered. Conversion rate (Unit Session Percentage) = 240 / 2000 = 12%.
Source: https://sellervault.io/glossary/conversion-rate

### CPC (also: Cost Per Click)
CPC (Cost Per Click) is the price you pay each time a customer clicks one of your Amazon PPC ads. CPC is determined by Amazon's real-time auction: you set a maximum bid for a keyword/target, Amazon runs the auction every time the keyword is searched, and the winning bidder pays slightly more than the second-highest bid.

Average CPCs vary wildly by category. Low-competition niches can have CPCs in the $0.20-0.40 range. High-competition categories like supplements, electronics, and home goods can run $1.50-4.00+ CPC. CPCs also fluctuate by time of day, day of week, and seasonal demand cycles.

The relationship between CPC, conversion rate, and AOV (Average Order Value) determines whether a campaign is profitable. Worked example: $1.50 CPC × 100 clicks = $150 spend. 10 conversions at $30 AOV = $300 revenue. ACoS = 50%. Whether that's profitable depends entirely on your unit margin. CPC is what you control via bid; conversion rate is what you control via listing quality, price, and image.
Source: https://sellervault.io/glossary/cpc

### Days of Cover (also: DOC, Days of Stock, Inventory Days on Hand)
Days of Cover (DOC) is the number of days your current on-hand inventory will last given recent sales velocity. The formula is `DOC = on-hand units / average daily sales`. A SKU with 100 units on hand selling 10/day has 10 days of cover.

Why DOC is the most useful inventory metric: it abstracts away absolute unit counts and converts everything to a single time-based number that's directly comparable across SKUs. A SKU with 1,000 units of cover can wait. A SKU with 12 days of cover and a 14-day lead time is already late on the reorder. DOC turns the question "do I have enough?" into "do I have enough TIME?"

A good restock workflow ranks SKUs by DOC ascending and processes the lowest-DOC items first. SellerVault's Restock Planning page does exactly that, with the addition of capacity-limit awareness and case-pack rounding. Spreadsheet-based restock workflows usually skip DOC entirely and that's why they miss stockouts on fast movers.

Example: You have 240 units of a SKU on hand. Average daily sales over the last 30 days is 8 units. DOC = 240 / 8 = 30 days. Your supplier lead time is 21 days, so you have 9 days of buffer before you need to ship in your next order — before factoring in safety stock.
Source: https://sellervault.io/glossary/days-of-cover

### Dimensional Weight (also: DIM Weight, Volumetric Weight)
Dimensional (DIM) weight prices the space a package occupies rather than just its mass, so a large, light item is not shipped for the same fee as a small, dense one. The formula is `DIM weight = (L × W × H) / dimensional divisor`, with dimensions in inches.

Amazon FBA fulfillment fees use "shipping weight," which is the GREATER of the unit's actual unit weight and its dimensional weight. For most FBA standard and large/bulky size tiers Amazon uses a divisor of 139 (cubic inches per pound). A pillow, for example, weighs little but bills on its bulk.

Understanding DIM weight matters when choosing packaging and product dimensions: shrinking a box just under a size-tier or weight-band boundary can drop the fulfillment fee meaningfully, and packing efficiently lowers the dimensional weight that drives the fee.

Example: A box is 18 × 12 × 10 inches = 2,160 cubic inches. DIM weight = 2,160 / 139 ≈ 15.5 lb. If the item actually weighs 6 lb, the FBA fee is billed on the 15.5 lb dimensional weight, not the 6 lb actual weight.
Source: https://sellervault.io/glossary/dimensional-weight

### Disposal Order (also: FBA Disposal, Disposal Request)
A disposal order (also called a removal-disposal) tells Amazon to destroy or recycle units in a fulfillment center rather than ship them back to you. Sellers use it for unsellable, expired, damaged, or slow-moving stock when paying for a return shipment and re-handling is not worth it.

Disposal carries a per-unit fee based on size and weight, similar to (and usually cheaper than) the fee for a removal order that ships units back. Amazon also auto-disposes or auto-removes inventory that exceeds storage limits or sits too long if you have enabled automated settings, so monitor those defaults.

Disposal is the harshest of three exit paths for stale FBA stock — the others being a removal order (ship back for liquidation or rework) and liquidation (Amazon resells through bulk channels for partial recovery). Disposing kills the unit entirely, so weigh it against the aged-inventory surcharge you would otherwise keep paying.

Example: A seller has 300 expired units accruing the aged-inventory surcharge. Rather than pay to ship them back, they place a disposal order at roughly $0.97/unit, ending the storage charges.
Source: https://sellervault.io/glossary/disposal-order

### Dropshipping
In dropshipping, the seller never stocks the product. When an order comes in, the seller buys the item from a supplier who ships it directly to the buyer. The appeal is low upfront capital and no inventory risk; the downside is thin margins and little control over quality or delivery speed.

Amazon's Dropshipping Policy permits it ONLY if the seller is the seller of record, removes all third-party packing slips, invoices, and branding, and handles returns. Buying from another retailer (e.g., Walmart) and having them ship to your Amazon customer — "retail dropshipping" — violates the policy and is a common cause of account suspension.

Because compliant dropshipping requires a genuine wholesale/supplier relationship and full branding control, most successful Amazon sellers use FBA or FBM with held inventory instead. Dropshipping on Amazon is far more constrained than on a self-hosted store.

Example: A compliant dropshipper takes an order, forwards it to their contracted manufacturer who ships in plain or seller-branded packaging with no competing invoices, and the seller manages any return — staying within Amazon's dropshipping policy.
Source: https://sellervault.io/glossary/dropshipping

### EAN (also: European Article Number, International Article Number, EAN-13)
The EAN, officially the International Article Number, is a 13-digit GTIN barcode issued by GS1 and used to identify retail products worldwide, predominantly outside the United States and Canada. The familiar form is EAN-13; an 8-digit EAN-8 exists for very small packages.

A UPC-A (12 digits) is simply an EAN-13 with a leading zero, so the two systems are compatible — Amazon accepts both as product identifiers when creating a listing. The EAN, like the UPC, must be a genuine GS1-issued code tied to your brand prefix; Amazon increasingly verifies identifiers against the GS1 database and rejects reused or invalid codes.

When you list a new product on Amazon, you supply an EAN or UPC as the external identifier, and Amazon assigns its own internal ASIN. For FBA, the unit is then tracked by its FNSKU, not the EAN.

Example: A seller listing a product in Amazon's UK and German marketplaces provides the GS1-issued EAN-13 "5012345678900" as the product identifier; Amazon matches or creates the ASIN from it.
Source: https://sellervault.io/glossary/ean

### FBA (also: Fulfillment by Amazon)
FBA (Fulfillment by Amazon) is the program where sellers send their inventory to Amazon's fulfillment centers, and Amazon handles all the logistics: storage, packing, shipping, returns, and customer service. The seller is responsible for sourcing, listing, pricing, and inventory replenishment; Amazon handles everything from "customer clicks Buy" to "package arrives at customer door."

FBA sellers get major Buy Box advantages over FBM sellers, automatic Prime eligibility on most listings, and offload the hard logistical problems. The trade-off: FBA fees (referral, fulfillment, storage, AWD/inbound placement, capacity caps, long-term storage surcharges) eat 25-45% of revenue depending on the product, and you give up direct control over inventory health.

Most serious Amazon businesses run FBA for the bulk of their catalog and use FBM only for oversized, hazmat, or low-velocity SKUs where the FBA fee structure doesn't make sense. SellerVault is built FBA-first but supports FBM SKUs as a separate competitive pool in the repricer.
Source: https://sellervault.io/glossary/fba

### FBA Fulfillment Fee (also: FBA Fee, Pick and Pack Fee)
The fulfillment fee is what FBA charges to handle the physical order: picking the unit from its bin, packing it, shipping it to the customer, and covering customer service and returns handling. Unlike the referral fee (a percentage of price), the fulfillment fee is a flat dollar amount determined by the unit's size tier and shipping weight, not its sale price.

Amazon assigns each unit a size tier (Small Standard, Large Standard, Large Bulky, and oversize tiers) from its packaged dimensions and weight, then looks up the fee on the current FBA rate card. Shipping weight is the greater of actual and dimensional weight. Apparel and dangerous-goods units have separate, usually higher, rate cards.

The fulfillment fee is the single largest variable cost on most low-priced FBA units, so it dominates margin math. Shaving packaging to drop into a smaller size tier or a lower weight band is one of the highest-leverage cost reductions available.

Example: A 9 oz item in the Small Standard size tier is charged roughly a $3.30 fulfillment fee per unit regardless of whether it sells for $15 or $25 — the fee tracks size and weight, not price.
Source: https://sellervault.io/glossary/fulfillment-fee

### FBA Liquidation (also: Amazon Liquidation, Grade and Resell)
Amazon's FBA Liquidations program routes excess, returned, or aged inventory to bulk liquidation partners who resell it through secondary channels. Instead of paying to dispose of or ship back stock that is bleeding the aged-inventory surcharge, you recover a fraction of its value — typically a small percentage of the average selling price, net of a liquidation fee.

Liquidation is one of three exit paths for stale FBA stock: a removal order (units shipped back to you), a disposal order (units destroyed), or liquidation (Amazon sells them in bulk). Liquidation usually nets more than disposal and avoids return-shipping logistics, but the recovery rate is low, so it is a loss-minimization tool, not a profit center.

The right move depends on the math: if the unit still has retail demand, lowering price or running ads beats liquidating; if it is dead stock racking up storage and surcharge fees, liquidation often beats disposal. Inventory tools surface which aging SKUs are candidates.

Example: A seller has 400 aged units of a discontinued product accruing the aged-inventory surcharge. They enroll them in FBA Liquidations and recover roughly 5–10% of average selling price — more than a $0 disposal — while clearing the storage liability.
Source: https://sellervault.io/glossary/liquidation

### FBM (also: Fulfillment by Merchant, Merchant Fulfilled)
FBM (Fulfillment by Merchant, sometimes called "Merchant Fulfilled Network" or MFN) means the seller is responsible for storing, packing, and shipping orders directly to customers. Amazon handles the marketplace; you handle the logistics.

FBM sellers don't pay FBA fees, which makes the model attractive for oversized items, low-velocity SKUs, hazmat products, brand-restricted listings, and any product where FBA storage + fulfillment fees would exceed margin. The trade-offs are real: FBM listings get a smaller Buy Box weighting (Amazon's algorithm favors FBA), customers don't see Prime badges by default unless you qualify for Seller Fulfilled Prime, and you're responsible for hitting Amazon's shipping and customer service performance metrics.

Many sellers run hybrid: FBA for fast-moving core catalog, FBM for slow-mover fade-outs and oversized items. SellerVault's repricer treats FBA and FBM as separate competitive pools so you can have different rules per fulfillment channel on the same ASIN.
Source: https://sellervault.io/glossary/fbm

### FNSKU (also: Fulfillment Network SKU)
FNSKU (Fulfillment Network SKU) is the barcode Amazon assigns to your units of a particular SKU when you list it for FBA. Two different sellers offering the same ASIN have different FNSKUs — Amazon uses the FNSKU to keep each seller's inventory separate within the fulfillment center, even if both sellers' physical units are stored on the same shelf.

The FNSKU prints onto the product label that goes on every unit before you ship it to FBA (unless you use Amazon's Stickerless, Commingled inventory program — which most sellers should avoid because it pools your inventory with everyone else's and can cause reimbursement headaches when commingled units come back damaged or counterfeit).

When you create an inbound shipment in Seller Central or via SellerVault's shipment wizard, the FNSKU is what gets printed onto the prep labels. If a label is wrong, Amazon will receive your units against the wrong FNSKU and you'll spend hours opening cases to fix it. Always verify FNSKU labels before shipping.
Source: https://sellervault.io/glossary/fnsku

### Fulfillment Center (also: FC, Amazon Warehouse)
Amazon fulfillment centers are the large warehouses that physically hold FBA inventory and ship customer orders. Each FC is identified by a code (e.g., ONT8, BFI4) where the letters denote the nearest airport and the number the specific building. Your inbound shipments are routed to one or more FCs based on Amazon's placement decisions.

Within an FC, the FBA fee covers picking the unit from its bin, packing it, and handing it to the carrier — the "pick and pack" work. Inventory is distributed across the FC network so that items are near customers, which is what enables fast Prime delivery. This distribution is also why FBA charges an inbound placement fee when you send stock to fewer locations than Amazon would prefer.

Fulfillment centers are distinct from AWD (Amazon Warehousing and Distribution) facilities, which are upstream bulk-storage/reserve warehouses that replenish FCs. Stock lost or damaged inside an FC is Amazon's liability and is generally reimbursable.

Example: A seller's inbound shipment of 500 units is split by Amazon and received at fulfillment centers ONT8 (California) and BFI4 (Washington) so the product is stocked near West Coast customers for faster delivery.
Source: https://sellervault.io/glossary/fulfillment-center

### Gated Category (also: Restricted Category, Category Approval)
Gated (restricted) categories require sellers to apply for and receive approval before listing. Amazon gates categories that carry quality, safety, authenticity, or counterfeit risk — common examples include Grocery, Health & Personal Care, Beauty (certain brands), Toys (especially during Q4), Watches, Jewelry, and many individual brands.

Ungating typically requires documentation: a valid invoice from a legitimate wholesale supplier showing a minimum quantity (often 10+ units) within a recent window, brand authorization letters, safety/compliance certificates, or product images. Requirements vary by category and brand, and some gates are not openable to all account types.

Gating protects margins for approved sellers by limiting competition, but it is also a sourcing obstacle: a profitable arbitrage or wholesale find is worthless if you cannot get ungated for that brand or category. Scanner tools flag whether you are eligible to sell a given ASIN before you buy.

Example: A seller finds a profitable grocery item but is blocked at listing. They submit a wholesale invoice for 10 units from an authorized distributor, get ungated in Grocery, and then list the product.
Source: https://sellervault.io/glossary/gated-category

### GETIDA
GETIDA is one of the largest standalone FBA reimbursement-recovery services. They audit your Seller Central account for eligible reimbursement claims (lost inventory, damaged inventory, fee overcharges, customer return discrepancies, etc.), file the claims through Seller Central, and take a flat percentage commission on any recovered funds — historically around 25%.

The value of services like GETIDA is real: most FBA sellers have eligible claims they'd never find on their own, and a 25% cut of "money you would have left on the table" is still a net win. The drawbacks are the flat commission rate (which can't be negotiated below 25% for most sellers) and the fact that reimbursement is bolted on as a separate service rather than integrated with your inventory and operations workflow.

SellerVault bundles reimbursement recovery into the main subscription with tiered commission as low as 10% on higher plans, and the audit engine runs continuously instead of in quarterly batches. For sellers recovering more than $20K/year in claims, the difference between 25% and 10% commission compounds quickly. See the [SellerVault vs GETIDA comparison](/alternatives/getida) for a side-by-side breakdown.
Source: https://sellervault.io/glossary/getida

### Gross Profit
Gross Profit on a per-unit basis is `Sale Price − COGS − Amazon Fees`. On a business basis it's `Total Revenue − Total COGS − Total Amazon Fees`. The formula varies slightly by source, but the point is to isolate the margin that comes from the product itself, before allocating shared expenses like advertising spend, software subscriptions, payroll, and tax.

Gross Profit is what most sellers MEAN when they say "margin" in casual conversation, but it overstates true profitability because it ignores PPC and operating costs. A SKU with 35% gross margin might have 12% net margin after PPC, software, and labor costs are allocated. SellerVault's analytics dashboard reports both gross profit and net profit so you can see the gap.
Source: https://sellervault.io/glossary/gross-profit

### GTIN (also: Global Trade Item Number)
The GTIN (Global Trade Item Number) is the GS1 framework that unifies retail barcodes worldwide. It is not a separate barcode you print but the underlying numbering standard; the UPC-A (12 digits), EAN-13 (13 digits), and ISBN (books) are all GTIN formats. Amazon's listing forms often label the external-identifier field "GTIN" to accept any of them.

Every legitimate GTIN traces back to a GS1 company prefix licensed to a specific brand owner. Amazon runs a GTIN-validity check against the GS1 database when you create listings, rejecting codes that are invalid, reused across unrelated products, or registered to a different company than your brand. Buying cheap, unauthorized "recycled" UPCs is a frequent cause of listing suppression.

For brand owners, Amazon offers a GTIN exemption for products that genuinely have no manufacturer barcode (e.g., handmade or bundle/multipack listings), letting you list without supplying a GTIN.

Example: A seller's listing is suppressed for an "invalid product identifier." The UPC they bought from a reseller fails Amazon's GS1 GTIN check; they purchase a GS1-issued code registered to their own brand prefix and the listing is restored.
Source: https://sellervault.io/glossary/gtin

### Hazmat (also: Dangerous Goods, Hazardous Materials)
Amazon classifies many everyday products as dangerous goods (hazmat): items containing lithium batteries, aerosols, flammable liquids, magnets, compressed gases, or corrosive/toxic chemicals. This covers far more than obvious chemicals — electronics, some cosmetics, cleaning supplies, and supplements can all be flagged.

Before FBA will accept a hazmat product, the unit must pass a dangerous-goods review, which usually requires a safety data sheet (SDS) or an exemption sheet from the manufacturer. Hazmat units are stored in separate, limited FC space and carry their own (higher) fulfillment-fee rate card, and they face tighter inbound and storage constraints.

Unreviewed or misclassified hazmat is a major source of stranded inventory — units that arrive but cannot be sold until paperwork clears. Always confirm a product's dangerous-goods status and have the SDS ready before sending it to FBA.

Example: A seller sends a shipment of battery-powered LED lights to FBA. The units are flagged as dangerous goods and held until the seller uploads the manufacturer's lithium-battery exemption sheet, after which they become sellable.
Source: https://sellervault.io/glossary/hazmat

### Inbound Placement Service Fee (also: IPSF, Placement Fee)
Inbound Placement Service Fee (IPSF) is the fee Amazon introduced in 2024 to charge sellers for the convenience of shipping to a single fulfillment center instead of splitting their inbound across multiple FCs at Amazon's discretion. The default behavior is "minimal shipment splits" where Amazon may split your inbound across 3+ destinations — the IPSF varies based on how few destinations you choose.

The three placement options: (1) Minimal Shipment Splits — lowest IPSF, but Amazon decides destinations and may split heavily; (2) Optimized Placement — medium IPSF, fewer splits; (3) Single Destination — highest IPSF, ship to one destination. AWD bypasses the IPSF entirely because the inventory enters the FBA network from the AWD facility, not from outside.

For multi-SKU shipments, IPSF can add 5-15% to total inbound cost. SellerVault's placement intelligence calculates which placement strategy minimizes total cost (IPSF + freight + AWD storage if applicable) and surfaces the recommendation directly in the shipment wizard.
Source: https://sellervault.io/glossary/inbound-placement-fee

### Inbound Shortage
An Inbound Shortage occurs when the quantity of units Amazon records as received from your inbound shipment is less than the quantity you actually shipped. This is one of the most common reimbursement opportunities, and one of the most under-claimed because it requires reconciling each shipment line by line.

Common causes: units lost during the unloading/check-in process, miscounts at receiving, units that fall behind conveyors, units redirected to the wrong fulfillment center. Amazon used to be very lenient about reconciling inbound shortages automatically; their auto-reimbursement coverage has tightened in recent years, putting more burden on sellers to file manually.

Filing deadline: 60 days from the shipment delivery date — Amazon shortened this from the former 9-month (270-day) window, so reconcile shipments promptly. Required evidence: the original shipment plan with declared quantities, carrier proof of delivery, and any photos or pack lists you have. SellerVault's reimbursement engine cross-references every inbound shipment line against received quantities and surfaces shortages with the evidence packet pre-attached.
Source: https://sellervault.io/glossary/inbound-shortage

### IPI (also: Inventory Performance Index)
IPI (Inventory Performance Index) is the score Amazon uses to evaluate how well an FBA seller manages inventory. It ranges 0-1000 and is derived from four components: excess inventory percentage, sell-through rate, stranded inventory percentage, and in-stock rate of high-demand SKUs.

Why it matters: IPI directly affects your monthly capacity limits. A high IPI score (typically 500+) gets you generous capacity, while a low IPI restricts how much you can store and may trigger storage overage surcharges. Amazon publishes the score weekly in the Inventory Performance Dashboard.

The four levers to improve IPI: (1) clear excess inventory through removal orders or aggressive markdowns, (2) keep best sellers in stock (in-stock rate is heavily weighted), (3) clean up stranded inventory daily — listings with inventory but no sellable status, (4) maintain steady sell-through across the catalog. SellerVault surfaces all four IPI components on the inventory dashboard and flags problems before they cap your capacity.
Source: https://sellervault.io/glossary/ipi

### Keyword Research
Keyword research identifies the search terms that drive traffic to a product type and ranks them by search volume, relevance, and competition. On Amazon — where most product discovery starts in the search bar, not Google — getting the right keywords into your listing is the primary lever for organic visibility.

Sources include Amazon's own autocomplete suggestions, Brand Analytics "Amazon Search Terms" reports (for Brand Registry sellers), the search terms competitors rank for (reverse-ASIN lookup), and third-party tools that estimate volume. The output is a prioritized list: high-volume "primary" keywords for the title, secondary terms for bullets, and long-tail/synonym terms for the backend Search Terms field.

Keyword research feeds both organic rank and paid search: the same terms become Sponsored Products targets. Strong placement plus good conversion on a keyword raises organic rank for it, compounding free traffic, which is why research is foundational to a product launch.

Example: For a "garlic press," research surfaces high-volume terms (garlic press, garlic mincer), mid-tail (stainless steel garlic crusher), and long-tail (garlic press with cleaning brush). The seller puts the top terms in the title and the rest in bullets and backend keywords.
Source: https://sellervault.io/glossary/keyword-research

### Lead Time
Lead Time is the total elapsed time from "I place a purchase order" to "the inventory is sellable in Amazon's FBA network." It includes supplier production time, shipping from supplier to your warehouse or prep center, prep work, inbound shipment to Amazon, Amazon's receive time, and the gap between received and sellable status.

Most wholesale operations underestimate lead time by 30-50% because they only count supplier production. A real lead time breakdown for a typical wholesale order might look like: 7 days production + 4 days freight + 2 days prep + 5 days inbound shipping + 3 days Amazon receive = 21 days total. If your DOC drops to 21 days you're ALREADY late on the reorder.

Good inventory tools track lead time per SKU per supplier and use the actual measured lead time (not the supplier's claimed lead time) to compute reorder points. SellerVault's restock engine learns lead time from the time gap between PO creation and "received" status across past orders, then surfaces a confidence interval — useful for flagging suppliers whose lead time has been creeping up.
Source: https://sellervault.io/glossary/lead-time

### Listing Hijacker
A "listing hijacker" is a third-party seller who lists their own (often counterfeit, knockoff, or used) product on YOUR brand-registered ASIN. Because Amazon listings are organized by ASIN rather than by seller, multiple sellers can technically list under the same ASIN — this is by design for commodity products. But for branded products, hijackers exploit this to free-ride on your reviews, brand authority, and search ranking while shipping inferior products.

The immediate damage: hijackers undercut your price (collapsing the Buy Box), receive negative reviews on your listing, and may even ship counterfeits that get tied to your brand. The long-term damage: degraded review score, suspended listings, and brand reputation damage.

Defense playbook: enroll in Amazon Brand Registry, set up Brand Protection alerts, monitor your ASINs for new sellers daily, send formal cease-and-desist letters to hijackers, file Brand Registry takedowns through the violation form, and use test buys to document counterfeit shipments. SellerVault's seller alerts include hijacker detection — you get notified within minutes of a new seller appearing on a brand-protected ASIN.
Source: https://sellervault.io/glossary/hijacker

### Lost Inventory
Lost Inventory refers to units that were received into Amazon's fulfillment network but Amazon can no longer locate. Causes range from misplaced bins to internal transfers gone wrong to literal warehouse damage events. Lost inventory is the single largest category of FBA reimbursement opportunity for most sellers.

Amazon now auto-reimburses most lost inventory within 30 days through the Inventory Discrepancy Report (IDR) — but "most" is the key word. Some lost units slip through the auto-reimbursement system and require manual claim filing within the eligibility window (typically 60 days from the date the unit was reported lost). Sellers who don't audit for missed auto-reimbursements regularly leave money on the table.

The correct workflow: (1) check the IDR weekly for auto-reimbursements applied, (2) cross-reference inventory ledger adjustments against IDR records, (3) file manual claims for any unreimbursed lost units within the eligibility window, (4) attach the relevant inbound shipment evidence. SellerVault's reimbursement engine automates all four steps — see the [Complete FBA Reimbursement Guide](/guides/complete-fba-reimbursement-guide-2026) for the full filing procedure.
Source: https://sellervault.io/glossary/lost-inventory

### MAP (also: Minimum Advertised Price)
MAP (Minimum Advertised Price) is a price floor that brands set for their authorized resellers. Selling below MAP can violate distributor agreements and get a seller terminated by the brand. MAP is enforced contractually, not by Amazon — Amazon doesn't police MAP violations directly, so the burden falls on the brand to monitor and act.

For authorized resellers, MAP is the practical minimum price for repricing. If your repricer drops below MAP to win the Buy Box, you risk losing your authorization with the brand. SellerVault's repricer supports MAP as a hard ceiling on the LOW side — i.e., the price floor mode "MAP" sets the repricer floor to MAP exactly, so the repricer will never advertise below MAP even if competitors are.

Not to be confused with MSRP (Manufacturer's Suggested Retail Price). MSRP is a recommended sale price; MAP is a binding price floor for authorized resellers.
Source: https://sellervault.io/glossary/map

### Margin
Margin is profit divided by sale price, expressed as a percentage. There are several variants depending on what costs you subtract first: gross margin (price minus COGS minus Amazon fees), contribution margin (gross minus direct variable costs like PPC), and net margin (contribution minus allocated overhead).

In casual seller conversation "margin" usually means gross margin. The trap: a 35% gross margin on a SKU with 25% TACoS leaves you with only 10 percentage points of contribution margin, before accounting for software, prep, and overhead. Sellers who optimize against gross margin alone often discover their net margin is negative when they finally do a full P&L.

Margin should always be paired with another anchor metric — usually ROI for arbitrage sellers, contribution margin for wholesale sellers, and TACoS-adjusted net margin for private label brands. Don't pick a SKU based on margin alone.
Source: https://sellervault.io/glossary/margin

### MSRP (also: Manufacturer's Suggested Retail Price)
MSRP (Manufacturer's Suggested Retail Price) is what the brand recommends the product sell for at retail. Unlike MAP, MSRP is non-binding — you can sell above or below it. For sellers, MSRP serves two purposes: it's often used as the upper price ceiling in repricers ("never go above MSRP") and it shows up as the strikethrough price in Amazon's discount messaging if you list the SKU at a lower price.

For private label brands, you set your own MSRP. For wholesale resellers, MSRP comes from the brand. SellerVault's repricer supports MSRP as a max-price mode — set the ceiling once and the repricer will never exceed it even when competition disappears and the math suggests you could.
Source: https://sellervault.io/glossary/msrp

### Multi-Channel Fulfillment (also: MCF, Multi Channel Fulfillment)
Multi-Channel Fulfillment (MCF) uses your existing FBA inventory pool to ship orders that originate off Amazon — your Shopify store, eBay, Walmart, or your own website. Amazon picks, packs, and ships the order from the same FC stock that serves Amazon orders, so you hold one inventory pool for all channels.

MCF is priced separately from standard FBA: it has its own per-unit fulfillment rate card (tiered by weight and chosen delivery speed) on top of the same monthly storage fees, and MCF fees rose about 3.5% on average effective January 2025. By default MCF ships in plain/unbranded boxes (no Amazon logo), and Buy with Prime is the related offering that displays the Prime badge on your own site.

MCF's tradeoff is convenience versus cost and control: you avoid running a second warehouse, but per-order fulfillment costs are higher than negotiated 3PL rates at scale, and your off-Amazon inventory competes with Amazon demand for the same units, which can affect IPI and restock planning.

Example: A brand sells the same SKU on Amazon and on its Shopify store. A Shopify order triggers an MCF request; Amazon ships the unit from FBA stock in an unbranded box, drawing down the same inventory pool used for Amazon orders.
Source: https://sellervault.io/glossary/multi-channel-fulfillment

### Net Profit
Net Profit is the bottom-line profit number after subtracting EVERY expense from revenue: COGS, Amazon fees, PPC spend, software subscriptions, payroll, prep, freight, taxes, and any other allocated costs. It's the only profitability number that actually matches what shows up in your bank account at year-end.

Most FBA sellers don't calculate net profit accurately because the costs are scattered across multiple systems: invoices in QuickBooks, Amazon settlements in Seller Central, PPC spend in Amazon Ads, software charges on credit cards, prep costs in supplier emails. SellerVault consolidates Amazon-side data, but accurate net profit still requires connecting your accounting workflow.

The gap between gross profit and net profit is where profitable-looking businesses go bankrupt. A seller doing $2M revenue at 30% gross margin has $600K of gross profit. After 18% TACoS ($360K), software and prep ($60K), and labor ($150K), net profit is $30K — 1.5% net margin. Same business, very different stories.
Source: https://sellervault.io/glossary/net-profit

### ODR (also: Order Defect Rate)
Order Defect Rate (ODR) is the percentage of your orders that received at least one of the following over a 60-day window: negative seller feedback, an A-to-Z guarantee claim, or a chargeback. Amazon's threshold is 1% — exceeding it puts your account at risk of suspension and can affect Buy Box eligibility immediately.

For FBA sellers, most ODR-relevant events are outside your direct control because Amazon handles fulfillment. The remaining sources are: product quality issues (a defective product gets a negative review and a refund), listing accuracy (the listing doesn't match what arrives), and policy violations. A sudden ODR spike usually points to a specific SKU with a quality problem.

FBM sellers face higher ODR risk because shipping delays, damaged packages, and tracking issues all contribute. Late Shipment Rate and ODR are tightly correlated for FBM operations. The defense is the same as for general account health: monitor weekly, investigate spikes immediately, and refund proactively before disputes escalate to A-to-Z claims.
Source: https://sellervault.io/glossary/odr

### Online Arbitrage (also: OA)
Online arbitrage means sourcing inventory from other online retailers — clearance sales, coupons, cashback, and price-error deals at stores like Target, Walmart, or Home Depot — and reselling those branded units on existing Amazon listings at a higher price. It is the e-commerce sibling of retail arbitrage (sourcing in physical stores).

OA requires no brand or product creation: you sell on an existing ASIN, competing for the Buy Box on price and fulfillment. Profit hinges on tight margin math after the referral fee, FBA fulfillment fee, and COGS, and on selling-eligibility — many brands and categories are gated, so a great buy is useless if you cannot get ungated. Scanner tools exist to compute net profit and flag gating before you purchase.

The model scales by sourcing volume, not by building equity in a brand, and faces risks unique to reselling: IP/brand complaints, sudden gating, and price competition from other sellers on the same listing. It is a common low-capital entry point that many sellers later graduate from into wholesale or private label.

Example: A seller buys a kitchen gadget on clearance for $8 plus 5% cashback and resells it on Amazon at $24. After the ~15% referral fee, ~$5 FBA fee, and COGS, they net roughly $6/unit — provided they are ungated for that brand.
Source: https://sellervault.io/glossary/online-arbitrage

### Organic Rank (also: Search Ranking, Keyword Ranking)
Organic rank is your listing's position in the natural (non-sponsored) search results for a specific keyword. Because the first page captures the overwhelming majority of clicks, ranking on page one for high-volume terms is the difference between strong free traffic and obscurity.

Amazon's ranking algorithm (often called A9/A10) weighs relevance — is the keyword indexed in your title/bullets/backend — and performance: sales velocity and conversion rate for that keyword, plus review count/rating, price, in-stock rate, and Prime eligibility. A listing that converts a keyword's traffic into sales climbs that keyword's organic rank, which brings more traffic, a compounding loop.

Organic rank is distinct from BSR: BSR ranks units sold within a whole category, while organic rank is per-keyword position in search. Sellers buy Sponsored Products traffic partly to seed early sales velocity on target keywords and bootstrap organic rank during a launch.

Example: A new listing sits on page 4 for "yoga mat." After a launch period of Sponsored Products ads driving sales and a 13% conversion rate on the term, it climbs to position 8 on page 1 and starts receiving steady organic traffic.
Source: https://sellervault.io/glossary/organic-rank

### Oversize (also: FBA Oversize, Bulky, Large Bulky)
Amazon sorts every FBA unit into a size tier from its packaged dimensions and weight. Units that exceed the Large Standard limits fall into bulky/oversize tiers — Large Bulky and the Extra-Large tiers (graded by longest side and weight) — which have their own, much higher fulfillment-fee rate card.

Oversize units cost more at every step: higher per-unit fulfillment fees, higher monthly storage rates (bulky storage is priced per cubic foot and spikes in the Q4 peak), and they consume restock and storage capacity faster. Dimensional weight matters even more here, since these items are often bulky relative to their mass.

For sellers, the size tier is a make-or-break margin input. A product that crosses from Large Standard into an oversize tier can see its fulfillment fee jump several dollars, so reducing packaging to stay under a tier boundary is a high-value optimization — and sourcing decisions should account for the oversize fee structure up front.

Example: A 24 × 18 × 14-inch storage bin weighing 11 lb lands in an oversize tier. Its FBA fulfillment fee runs well above a Large Standard unit, and it accrues bulky-rate storage fees — so the seller prices it to absorb those costs.
Source: https://sellervault.io/glossary/oversize

### Parent ASIN
Parent ASIN is the umbrella ASIN that holds together a set of variation child ASINs — all the sizes, colors, or flavors of one product family. Each variation has its own child ASIN with its own inventory, pricing, and Buy Box, but they share a single product detail page that shows the variation picker (size dropdown, color swatches, etc.).

Why variations matter: review counts and BSR are pooled at the parent level. A new size variation listed under an existing parent inherits the entire review history and search ranking of the parent ASIN, which is a massive launch advantage. The trap: if Amazon decides your variations don't meet variation policy criteria, they can split the parent — and each child becomes a fresh ASIN with zero reviews.

For private label brands, planning the variation tree before launch is a meaningful strategic decision. For wholesalers and arbitragers, parent ASINs are mostly something to keep an eye on because product changes upstream can ripple through the variation hierarchy.
Source: https://sellervault.io/glossary/parent-asin

### PPC (also: Pay Per Click, Sponsored Ads)
PPC (Pay Per Click) advertising on Amazon refers to the suite of self-service ad products that charge sellers per click: Sponsored Products (SP), Sponsored Brands (SB), and Sponsored Display (SD). Sponsored Products are the most common — keyword and ASIN-targeted ads that appear in search results and on product detail pages. Sponsored Brands are headline banners with custom creative for brand-registered sellers. Sponsored Display is targeted retargeting and category-based display.

PPC is the primary growth lever for new product launches because it's the only way to generate impressions before organic ranking is established. The trade-off is cost — PPC spend is the largest single line item for most private label brands, often 15-30% of revenue. Optimizing campaigns is its own discipline (keyword harvesting, negative keyword pruning, bid adjustments, dayparting), and most sellers either learn it themselves over months or hire an agency.

The metrics that matter for PPC: ACoS (per-campaign efficiency), TACoS (whole-business impact), CPC (cost per click), CTR (click-through rate), and conversion rate. SellerVault's analytics dashboard surfaces all five, plus the TACoS context that drives the repricer's pricing decisions.
Source: https://sellervault.io/glossary/ppc

### Prep Requirements (also: FBA Prep, Prep Guidance)
FBA prep requirements specify the physical preparation each unit needs before it enters a fulfillment center: poly-bagging with a suffocation warning, bubble wrap for fragile items, taping for liquids, opaque bagging for adult products, "sold as set" labeling for multipacks, and an FNSKU label on every unit so Amazon can track it.

Getting prep wrong has direct costs. Non-compliant units can be refused, trigger an Amazon unplanned-prep service fee (Amazon does the prep and bills you), or be damaged in transit and become unsellable. Some product types — liquids, powders, sharp items, and those with hazmat components — have mandatory prep that cannot be skipped.

Sellers either prep in-house, use a third-party prep center between the supplier and Amazon, or pay Amazon's FBA Prep Service. Correct prep is what keeps inbound shipments from generating discrepancies, stranded units, or unplanned-service charges, so it is checked as part of building any inbound shipment.

Example: A seller ships glass jars to FBA without bubble wrap. Several arrive broken and unsellable, and Amazon applies an unplanned-prep fee to bag the rest — costs avoided by following the bubble-wrap prep requirement up front.
Source: https://sellervault.io/glossary/prep-requirements

### Private Label (also: PL)
Private label means putting your own brand on an otherwise generic product — typically a manufacturer's base product customized with your logo, packaging, and sometimes minor modifications. Unlike arbitrage or wholesale (reselling other brands on shared listings), a private-label seller creates and owns the ASIN, so no one else competes for the Buy Box on it.

The model trades higher upfront effort and capital — product development, branding, Brand Registry enrollment, a launch, and inventory commitment — for durable advantages: pricing power, no Buy Box competition, the ability to build reviews and brand equity, and access to A+ Content and Sponsored Brands. Margins are generally higher than reselling because you control sourcing and price.

Private label is the path most associated with building a sellable, defensible Amazon business, but it concentrates risk in a few SKUs: a bad product, a hijacker, or a stockout hurts more when one ASIN carries the brand. Brand Registry and tight restock planning are essential safeguards.

Example: A seller sources a generic silicone kitchen utensil set from a manufacturer, adds their "HomeCraft" branding and packaging, registers the trademark in Brand Registry, and launches it as a new ASIN that only they sell.
Source: https://sellervault.io/glossary/private-label

### Referral Fee (also: Amazon Commission)
The referral fee is Amazon's commission for providing the marketplace and is charged on every sale, whether you fulfill via FBA or FBM. It is a percentage of the total sale price — item price plus shipping and any gift wrap — not of your profit. Most categories are 15%, but rates range roughly from 8% (some electronics) to 17% (jewelry above a threshold), and some categories use tiered rates by price.

Many categories also carry a per-item minimum referral fee (commonly $0.30), so very low-priced items pay the floor rather than the percentage. The referral fee is separate from and stacks on top of the FBA fulfillment fee, storage fees, and any ad spend.

Because the referral fee scales with price while the fulfillment fee is flat, it is the dominant fee on higher-priced items and a primary input to every margin calculation. Knowing your category's exact rate is essential before setting price or evaluating a sourcing deal.

Example: A home-goods item sells for $40 in a 15% referral-fee category. Referral fee = 40 × 0.15 = $6.00. That $6 is deducted in addition to the FBA fulfillment fee before the seller sees net proceeds.
Source: https://sellervault.io/glossary/referral-fee

### Reimbursement
A "reimbursement" in FBA context is any payment Amazon owes you to compensate for inventory or fee errors that happened inside Amazon's control. Categories include: inbound shipment shortages (Amazon received less than you sent), inbound damage (Amazon damaged units during intake), warehouse lost inventory, warehouse damaged inventory, customer return discrepancies (item not returned, wrong item returned, damaged on return), refund overcharges, fee overcharges (incorrect product weight or dimensions), and removal order discrepancies.

Amazon auto-reimburses some categories within 30 days (notably warehouse lost and warehouse damaged) but the auto-reimbursement system is incomplete. Many eligible reimbursements require manual claim filing through Seller Central within strict deadlines — typically 60-120 days depending on category. Sellers who never audit their account regularly miss tens of thousands of dollars of eligible claims per year.

The SellerVault reimbursement engine runs 10+ detection algorithms across the full claim window, surfaces eligible discrepancies with evidence packets ready to attach, and uses TOS-compliant manual filing through Seller Central (not API automation, which Amazon prohibits for reimbursement filing). See the [Complete FBA Reimbursement Guide](/guides/complete-fba-reimbursement-guide-2026) for the full category breakdown and filing procedure.
Source: https://sellervault.io/glossary/reimbursement

### Removal Order (also: FBA Removal, Removal Request)
A removal order pulls units out of FBA and returns them to an address you specify — your warehouse, a prep center, or a liquidator. Sellers use removals to rescue stranded or slow-moving inventory, retrieve units before they accrue more aged-inventory surcharge, recover customer-returned units for inspection/rework, or pull stock for sale through other channels.

Removals carry a per-unit fee based on size and weight (similar in structure to the fulfillment fee). The two sibling exit paths are a disposal order (Amazon destroys the units, usually cheaper) and FBA Liquidation (Amazon bulk-sells them for partial recovery). Amazon can also auto-generate removals when inventory exceeds storage limits or hits aged-inventory thresholds if automated settings are enabled.

Removal is the right choice when the units still have value you can recapture — reselling elsewhere, relabeling, or fixing prep issues — and is worth more than the removal fee plus return shipping. For dead stock with no resale path, disposal or liquidation usually wins the math.

Example: A seller has 150 stranded units from a listing that got suppressed. They place a removal order at about $0.97/unit to ship the inventory back to their warehouse, where they relabel and relist it.
Source: https://sellervault.io/glossary/removal-order

### Reorder Point (also: ROP)
Reorder Point (ROP) is the inventory level at which you should trigger the next supplier order. The formula is `ROP = (average daily sales × lead time in days) + safety stock`. When on-hand falls to ROP, the math says you should place an order today.

Worked example: a SKU sells an average of 8 units per day, has a 21-day lead time, and you want 10 days of safety stock. ROP = (8 × 21) + (8 × 10) = 168 + 80 = 248 units. When on-hand drops to 248 units, place the order.

Reorder point only works if all three inputs are accurate: average daily sales must reflect recent (not all-time) velocity, lead time must reflect ACTUAL lead time (not the supplier's aspirational claim), and safety stock must reflect demand variability (not just an arbitrary buffer). Static spreadsheet ROPs become wrong fast when any of these change. SellerVault's restock engine recomputes ROP continuously from live sales velocity and historical lead time measurements.
Source: https://sellervault.io/glossary/reorder-point

### Repricer (also: Repricing Software, Automated Repricer)
A repricer is software that automatically adjusts your product prices on Amazon in response to competitor price changes, Buy Box ownership shifts, and rules you configure. The motivation: at any meaningful catalog size, manual repricing is impossible — competitors change prices hundreds of times per day, the Buy Box rotates every few minutes, and any seller still typing prices into Seller Central is leaving money on the table.

Repricers come in three rough generations: (1) Match-the-lowest-price scripts (worse than nothing because they collapse the Buy Box for everyone), (2) Rule-based repricers with margin floors (acceptable for stable catalogs), (3) Strategic repricers that model Buy Box probability, factor in fulfillment channel, and protect margin against TACoS pressure (the only generation worth using on a serious business).

The most important repricer features to demand: hard margin floors at the database level (so the repricer literally CANNOT submit a price below the floor), anti-oscillation guards (to prevent narrow-band zig-zag pricing storms), velocity circuit breakers (to halt the repricer when submission rates spike unexpectedly), and a full audit trail per SKU. SellerVault has all four — see the [Complete Amazon Repricing Guide](/guides/complete-amazon-repricing-guide) for the full feature checklist.
Source: https://sellervault.io/glossary/repricer

### Restock Limits
Restock Limits are the per-month cap on how many units you can SEND to Amazon's FBA network, distinct from Capacity Limits (which cap how much you can store there). A seller can have plenty of remaining capacity but be unable to inbound new shipments because their restock limit is full for the month.

Restock limits are set by storage type (standard, oversized, etc.) and reset monthly. They're influenced by the same factors as capacity limits — IPI score, sales velocity, and Amazon's overall capacity — but the math is different. A common gotcha: you have 5,000 cubic feet of remaining capacity but only 200 units of remaining standard restock for the month. You can't actually use that capacity.

SellerVault's restock planner surfaces remaining restock limit and remaining capacity side by side, and warns when a recommendation would exceed either constraint. Most spreadsheet workflows ignore restock limits entirely and only discover them when an inbound shipment gets rejected at creation.
Source: https://sellervault.io/glossary/restock-limits

### Returnless Refund (also: Refund Without Return, Refund at First Scan)
A returnless refund occurs when Amazon issues a customer refund but does not ask the buyer to ship the item back, usually because the return shipping cost exceeds the item's value or for certain product types. The buyer keeps the product, and the seller loses the unit's cost without recovering the physical inventory.

A related FBA mechanic is "refund at first scan," where Amazon refunds the buyer as soon as a return is scanned into the carrier network — before it physically reaches the FC. If that unit never arrives, is the wrong item, or comes back damaged, the seller is owed a reimbursement, but Amazon does not always issue it automatically.

Returnless and first-scan refunds are a quiet source of lost money: the refund is real and immediate, but the offsetting inventory return or reimbursement may never post. Reconciling refunds against returned units and filing reimbursement claims for the gaps is exactly the kind of leakage that recovery tools surface.

Example: A customer is refunded $18 on a low-value item under a returnless-refund policy and keeps the product. The seller loses the unit's COGS; if Amazon's policy entitles the seller to a reimbursement and none posts, it becomes a recoverable claim.
Source: https://sellervault.io/glossary/returnless-refund

### Returns Processing Fee (also: Return Processing Fee, High Return Rate Fee)
Effective June 1, 2024, Amazon charges a returns processing fee on FBA products whose monthly return rate exceeds a category-specific threshold. The fee applies per returned unit above that threshold and is sized like a fulfillment fee — by product category, size, and weight (rates broadly ranging from about $2 to over $11 per unit).

Apparel and Shoes are treated differently: they have no return-rate threshold, so a fee is charged on every returned unit in those categories regardless of how high or low the return rate is. Products that ship fewer than ~25 units per month are generally exempt, and the fee is billed on a delayed schedule (months after the returns occur).

The returns processing fee turns high return rates into a direct, escalating cost, making it a strong incentive to fix the root causes of returns — inaccurate sizing, misleading images, poor quality, or wrong expectations set by the listing. It is separate from the loss of the unit itself and from any returnless refund.

Example: A clothing SKU sells 500 units and gets 60 returns in a month. Because apparel has no threshold, Amazon charges the returns processing fee on all 60 returned units, on top of the lost margin on those orders.
Source: https://sellervault.io/glossary/returns-processing-fee

### ROI (also: Return on Investment)
ROI (Return on Investment) is profit divided by the COGS that produced it, expressed as a percentage. The formula is `ROI = Profit / COGS × 100`. A SKU costing $10 that nets $5 profit has 50% ROI.

ROI vs Margin is one of the most common confusions in FBA. They measure different things. Margin tells you "how much of each dollar of revenue is profit" (Profit / Sale Price). ROI tells you "how much your invested cash multiplied by" (Profit / COGS). For arbitrage and any high-turnover business, ROI is the right metric because it accounts for how fast capital recycles.

Worked example: SKU A has 50% margin and 100% ROI. SKU B has 25% margin and 200% ROI. Which is better? Depends on turnover. If both turn 12x/year, SKU B doubles your money 12 times — far better than SKU A doubling once. Most arbitrage sourcing decisions should optimize for ROI, not margin. Most private label decisions should optimize for contribution margin, not ROI, because cash isn't the constraint.

Example: You buy a SKU for $8, sell it for $25, pay $5 in Amazon fees, and net $12 profit per unit. Margin = 12 / 25 = 48%. ROI = 12 / 8 = 150%. Same SKU, very different stories.
Source: https://sellervault.io/glossary/roi

### SAFE-T Claim (also: Seller Assurance for E-commerce Transactions)
SAFE-T (Seller Assurance for E-commerce Transactions) claims are reimbursement requests filed by FBM (merchant-fulfilled) sellers when Amazon refunded a customer without consulting the seller — typically because Amazon decided the buyer was right under the A-to-Z guarantee. SAFE-T is the appeal mechanism: "Amazon refunded my customer; I have evidence the customer was wrong; please reimburse me."

SAFE-T claims have strict evidence requirements: tracking proof, photos of the shipped product, customer communication records, and a clear explanation of why the refund was inappropriate. Approval rates run somewhere around 60-70% for well-documented claims, much lower for undocumented ones.

SAFE-T does NOT apply to FBA orders — for FBA, Amazon handles the customer experience and the reimbursement category is "customer return discrepancy" rather than SAFE-T. The two categories follow different filing procedures and different evidence rules. See the [Complete FBA Reimbursement Guide](/guides/complete-fba-reimbursement-guide-2026) for both procedures.
Source: https://sellervault.io/glossary/safe-t-claim

### Safety Stock
Safety Stock is the inventory buffer you hold above expected demand to protect against two kinds of variance: demand variance (some weeks sell more than the average) and lead time variance (some shipments arrive later than expected). Without safety stock, even perfect average forecasts produce stockouts about half the time because half your weeks are above average.

The simple safety stock formula is `safety stock = Z × σ × √(lead time)` where Z is the desired service level (1.65 for 95% in-stock probability, 2.33 for 99%), σ is the standard deviation of daily demand, and lead time is in days. In practice most operators don't bother with the formula and instead pick a number of "safety days" by feel — 7 days for stable SKUs, 14-21 days for volatile ones.

Safety stock is a trade-off: more safety stock means fewer stockouts but more storage cost, capacity consumption, and capital tied up. SellerVault's Monte Carlo forecasts produce probabilistic distributions per SKU, so you can pick a target service level (95%, 99%) and the engine derives the right safety stock from actual demand variance — instead of using a flat 14-day buffer across the catalog.
Source: https://sellervault.io/glossary/safety-stock

### Sales Velocity (also: Velocity)
Sales Velocity is units sold per unit of time, typically expressed as units per day or units per week. It's the foundational input for every inventory decision: forecasting, reorder points, safety stock, days of cover, and storage cost projections all start with velocity.

The trap with velocity: which window do you measure? 30-day average smooths out short-term noise but lags trend changes. 7-day average tracks recent shifts but is volatile. The right approach is to track multiple windows side by side and pay attention to the direction of change. A SKU with 30-day velocity of 8/day and 7-day velocity of 14/day is accelerating — your reorder point assumptions from a week ago are already wrong.

Seasonality compounds the problem. Q4 velocity for a Christmas item is 10x its baseline, but the average across the year hides that. Good inventory tools weight velocity by recency AND adjust for seasonality. SellerVault's Monte Carlo forecasting produces a probabilistic velocity range that flexes with both recent trend and historical seasonality.
Source: https://sellervault.io/glossary/velocity

### Sell-Through Rate (also: STR, Inventory Sell-Through)
Sell-through rate (STR) measures how quickly inventory converts to sales over a window. A common formula is `Sell-Through Rate = Units Sold / (Units Sold + Units On Hand) × 100` for the period, expressed as a percentage; a higher rate means stock is turning fast and a lower rate signals overstock or weak demand.

Amazon uses a related metric in the Inventory Performance Index (IPI): the FBA sell-through ratio (units shipped over the trailing window divided by average inventory) is one of IPI's core components. Low sell-through drives down IPI, which can trigger storage limits and aged-inventory surcharges, so it has consequences beyond a vanity number.

Sell-through is the heartbeat of restock and liquidation decisions: high STR plus low days-of-cover means reorder now; low STR plus aging inventory means consider a price drop, ads, or liquidation before the aged-inventory surcharge erodes the position.

Example: A SKU sold 300 units last month and has 200 units on hand. Sell-through rate = 300 / (300 + 200) = 60% — healthy turnover that supports reordering rather than liquidating.
Source: https://sellervault.io/glossary/sell-through-rate

### Seller Central (also: Amazon Seller Central, SC)
Seller Central (sellercentral.amazon.com) is the control panel for third-party marketplace sellers. From it you create and edit listings, send FBA inbound shipments, manage pricing and inventory, run advertising campaigns, download business and finance reports, file reimbursement and SAFE-T claims, and monitor account-health metrics like ODR and IPI.

It is distinct from Vendor Central, the separate portal for first-party (1P) vendors who sell their products wholesale TO Amazon (Amazon then resells them). The vast majority of marketplace businesses are 3P sellers on Seller Central; a "Sold by Amazon" listing typically comes through Vendor Central instead. The two account types have different fee structures, pricing control, and tools.

Seller Central also exposes the SP-API (Selling Partner API), which third-party software uses to read inventory, orders, fees, and reports programmatically — the integration layer that inventory, repricing, and reimbursement tools build on.

Example: A seller logs into Seller Central to create an FBA inbound shipment, check that their Account Health dashboard shows ODR under 1%, and download the monthly settlement report for bookkeeping.
Source: https://sellervault.io/glossary/seller-central

### SKU (also: Stock Keeping Unit, Seller SKU, MSKU)
A SKU (Stock Keeping Unit), sometimes called the Merchant SKU or seller SKU, is the identifier YOU assign to a specific product you sell. Unlike the ASIN (which Amazon assigns and shares across everyone selling that product) and the UPC/EAN (the global barcode), the SKU is private to your account and entirely your choice of format.

Well-designed SKUs encode useful information — supplier, cost, batch, or condition — so you can manage inventory at a glance, e.g., "WIDGET-BLU-L-SUPPLIERA-0824." Two sellers can list the same ASIN under completely different SKUs, and a single ASIN can even have multiple SKUs in one account (for different conditions or fulfillment channels).

The SKU is the anchor for your operations: restock planning, COGS tracking, and profitability reports key off it. For FBA, each SKU maps to an FNSKU (the FBA-specific barcode), while the public-facing identity stays the ASIN.

Example: A seller lists a blue large t-shirt on a shared ASIN under their own SKU "TSHIRT-BLU-L-001," which encodes color and size so their inventory and COGS reports stay organized even though the ASIN is shared with other sellers.
Source: https://sellervault.io/glossary/sku

### Sponsored Brands (also: SB, Headline Search Ads)
Sponsored Brands (formerly Headline Search Ads) are keyword-targeted, cost-per-click banner ads that appear at the top of, within, and below search results. A typical creative shows your brand logo, a custom headline, and three featured products, and can drive clicks to your Brand Store or a custom landing page rather than a single product listing.

Unlike Sponsored Products (which any seller can run on a single ASIN), Sponsored Brands require Amazon Brand Registry. They are a brand-awareness and category-defense tool: a private-label seller uses them to own the top of the results for their brand name and category keywords and to send shoppers into a curated Store experience. Sponsored Display, also a Brand Registry ad type, instead retargets shoppers on and off Amazon.

Sponsored Brands are measured with the same ACoS/TACoS economics as other Amazon ads, but because they push Store traffic and brand discovery, their value often shows up in halo sales and new-to-brand metrics rather than last-click attribution alone.

Example: A registered brand runs a Sponsored Brands ad on the keyword "protein powder." The banner shows its logo, the headline "Clean Plant Protein," and three flavors, clicking through to its Brand Store — capturing premium top-of-search placement.
Source: https://sellervault.io/glossary/sponsored-brands

### Sponsored Products (also: SP)
Sponsored Products (SP) is the most common Amazon PPC ad type and accounts for the majority of seller PPC spend. Sponsored Products ads appear in search results (above, alongside, and below organic results) and on product detail pages of related products. They're targeted at keywords (buyer searches) or specific ASINs (competitor product pages).

SP campaigns come in two targeting flavors: automatic (Amazon picks keywords/ASINs based on the listing) and manual (you choose the targets). The standard playbook is to run automatic campaigns to discover high-performing search terms, harvest the winners into manual campaigns where you can bid and budget more precisely, and shift the auto budget toward exploration over time.

Sponsored Products is also the largest source of TACoS pressure for private label brands. Optimizing SP campaigns is its own discipline — most serious brands either invest 10+ hours/week into manual optimization or hire a PPC agency.
Source: https://sellervault.io/glossary/sponsored-products

### Storage Fees
FBA Storage Fees are the monthly per-cubic-foot fees Amazon charges for inventory stored in their fulfillment centers. Standard rates apply January through September; rates roughly triple in October-December (the "Q4 surcharge") to discourage sellers from over-stocking ahead of the holiday season. Long-term storage surcharges and aged inventory surcharges apply to inventory that's sat in FBA for too long.

The four storage fee components: (1) standard monthly fee per cubic foot, varying by storage class; (2) Q4 surcharge October-December; (3) Aged Inventory Surcharge for units stored 181+ days, escalating with age; (4) Long-Term Storage Fee for units stored 365+ days. For a SKU that sits idle for a year, storage cost can exceed the unit's gross profit — turning every "I'll sell it eventually" decision into a slow loss.

The defensive playbook: monitor IPI weekly, identify aged inventory monthly, take aggressive markdowns or removal orders on units approaching the 180-day window, and use AWD for any inventory that doesn't need to be in FBA right now. SellerVault surfaces aged inventory and projected storage cost on the inventory dashboard.
Source: https://sellervault.io/glossary/storage-fees

### Stranded Inventory
Stranded Inventory refers to FBA units that exist in Amazon's fulfillment centers under your account but are not currently sellable because the listing has a problem. Common causes: the listing was suppressed for a content violation, the ASIN was merged into another listing, the seller account is gated for the brand, the listing was accidentally deactivated, or the product was flagged for a category restriction.

Stranded inventory is a triple loss: you can't sell it (no revenue), you're paying storage fees on it (cost), and it counts against your IPI score (cap on future capacity). Amazon's Stranded Inventory page in Seller Central lists all stranded units with the reason and a recommended fix; the fix usually requires editing the listing, opening a case, or filing a removal order.

The playbook: check the Stranded Inventory page daily (yes, daily — small amounts pile up fast), fix what's fixable, file removal orders for the rest. SellerVault's daily inventory health check surfaces stranded inventory alongside other restock priorities so it doesn't get forgotten.
Source: https://sellervault.io/glossary/stranded-inventory

### Subscribe & Save (also: SnS, Subscribe and Save)
Subscribe & Save (SnS) lets customers set up automatic, scheduled deliveries of consumable products (groceries, supplements, household goods, pet supplies) in exchange for a discount. It builds predictable, recurring demand and improves retention, since subscribers reorder by default instead of re-shopping the category each time.

The discount is funded partly by Amazon and partly by the seller: sellers can opt into an additional funded discount tier (commonly 0%, 5%, 10%, or 15%) on top of Amazon's base 5% for qualifying orders, with extra discounts when a customer receives multiple SnS items in one delivery. The product must be FBA and in a consumable-eligible category.

For sellers, SnS trades a slice of margin for demand stability and a forecasting advantage: subscription volume is more predictable than spot demand, which sharpens restock planning and reduces the risk of stockouts on staple SKUs. The tradeoff is the recurring discount and the need to stay reliably in stock to avoid skipped deliveries.

Example: A seller offers a 5% seller-funded Subscribe & Save discount on a coffee SKU. Subscribers lock in monthly deliveries, giving the seller a predictable baseline of ~400 recurring units/month to plan restocks around.
Source: https://sellervault.io/glossary/subscribe-and-save

### TACoS (also: Total Advertising Cost of Sale, Total Advertising Cost of Sales)
TACoS (Total Advertising Cost of Sale) measures advertising spend as a percentage of TOTAL revenue, not just ad-attributed revenue. The formula is `TACoS = Ad Spend / Total Revenue × 100`. Where ACoS only counts the revenue Amazon attributes to your ads, TACoS includes the organic revenue your ads helped generate too.

Why it matters more than ACoS: a campaign with rising ACoS but falling TACoS is GOOD — it means your ad-attributed efficiency is dropping but your organic ranking is improving fast enough that total business performance is still ahead. A campaign with falling ACoS but rising TACoS is BAD — your ad-attributed numbers look great but you're actually subsidizing more revenue than you're generating.

Healthy TACoS varies wildly by stage: brand new product launches commonly run 25-40% TACoS for 2-3 months, mature catalogs settle in the 5-15% range, dominant brands can drop below 5%. SellerVault is the only Amazon repricing software that factors TACoS pressure into pricing decisions — when a SKU is carrying high TACoS, the repricer protects margin harder instead of cratering price to win the Buy Box. See the [Complete Amazon Repricing Guide](/guides/complete-amazon-repricing-guide) for the full TACoS-aware repricing playbook.

Example: You spent $1,000 on PPC last month. Amazon attributed $4,000 in sales to those ads. Your total revenue last month was $20,000. ACoS = 1000 / 4000 = 25%. TACoS = 1000 / 20000 = 5%. The 5% TACoS is the meaningful number for business health.
Source: https://sellervault.io/glossary/tacos

### UPC (also: Universal Product Code, UPC-A)
The UPC (Universal Product Code), specifically UPC-A, is the 12-digit barcode you see on retail packaging in the US and Canada. It is a GTIN format issued through GS1, and each code traces to a company prefix licensed to a specific brand owner. A UPC-A is equivalent to an EAN-13 with a leading zero, so the two are interchangeable on Amazon.

When you create a brand-new listing on Amazon, you supply a UPC (or EAN) as the external product identifier, and Amazon generates its own internal ASIN for the catalog. Amazon validates UPCs against the GS1 database and rejects codes that are invalid, recycled, or registered to a different company than your brand — buying cheap third-party UPCs is a common cause of listing suppression.

Brand owners that genuinely lack manufacturer barcodes (handmade goods, bundles, multipacks) can apply for a GTIN exemption to list without a UPC. For FBA, the unit is ultimately tracked by its FNSKU label, not the UPC.

Example: A seller creating a new listing enters the GS1-issued UPC "012345678905." Amazon validates it against the GS1 registry, accepts it, and assigns the product an ASIN like B0XXXXXXXX.
Source: https://sellervault.io/glossary/upc

---

## FBA Fees by Category (20 categories)
Figures are approximations of Amazon's published US schedule and change periodically — always confirm in Seller Central. Both a referral-fee percentage AND a per-item minimum apply (Amazon charges the greater).

### Apparel & Accessories
Referral fee: 17% (minimum $0.30 per item).
Referral fee 17% (higher than most categories). Apparel storage uses a separate fee schedule and FBA returns processing fees apply.

Apparel & Accessories uses a 17% referral fee rate — the highest of any major category. The premium reflects the higher cost-to-serve of apparel sales: returns rates are 10-30%, returned items often arrive damaged or used, and Amazon's warehouse handling for hanging garments is more complex.

Apparel also pays a per-return processing fee on top of standard fees, which is unique to this category and footwear. Sellers need to model expected return rate into margin math — a 25% net margin on initial sale can become 5% net margin after factoring in returns processing.

Fulfillment fees for apparel are mostly small standard or large standard. Heavy outerwear and shoes can push into larger tiers. The biggest operational consideration in apparel is variation management — most clothing SKUs have many variations (size, color), and managing the variation tree well is critical for visibility and review accumulation.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.43 — T-shirts, accessories
- Large standard (1-3 lbs): $5.60 — Most apparel
- Large standard (3-20 lbs): $7.05 — Outerwear, shoes

Category-specific fees: FBA Apparel returns processing fee applies to every return.; Higher base referral fee (17% vs 15% for most categories).
Source: https://sellervault.io/fba-fees/apparel-and-accessories

### Automotive and Powersports
Referral fee: 12% (minimum $0.30 per item).
Referral fee 12% — below the 15% default — with a $0.30 minimum, plus weight-driven fulfillment and frequent oversize/hazmat surcharges.

Automotive and Powersports carries a 12% referral fee, three points under Amazon's 15% default. That discount matters on the high-ticket parts (brake kits, lift kits, batteries) that define the category, where every point of referral fee is real margin.

The fulfillment story is dominated by weight and bulk. A lot of auto parts are dense, heavy, and irregularly shaped, so they land in the upper standard tiers or tip into oversized, where fulfillment fees climb quickly. Dimensional accuracy is critical: a slightly oversized cure (a bumper, a floor jack, a set of rims) can move you from a $6.85 large-standard fee to a $19+ oversized fee.

For sellers, the 12% rate makes automotive attractive on margin, but the category is fit-and-compatibility intensive — wrong-fitment returns are common and erode the referral-fee advantage. Many parts also carry hazmat designations (batteries, fluids, airbags, aerosols), so factor in hazmat handling and storage constraints before sourcing.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Bulbs, fuses, small sensors
- Large standard (1-3 lbs): $5.40 — Filters, belts, wiper blades
- Large standard (3-20 lbs): $6.85 — Brake pads, alternators, batteries
- Small oversized: $9.73 — Exhaust sections, floor jacks
- Medium oversized: $19.05 — Bumpers, body panels, wheel/tire sets

Category-specific fees: Lithium and lead-acid batteries, fluids, aerosols, and airbags trigger hazmat handling fees and storage restrictions.

Restrictions: Many parts require fitment approval; some powersports items and chemicals are gated or hazmat-restricted.
Source: https://sellervault.io/fba-fees/automotive-and-powersports

### Baby Products
Referral fee: 8% (minimum $0.30 per item).
Referral fee 8% on items above $10, 15% below. Strict safety compliance requirements.

Baby Products uses the dual-rate referral fee structure: 15% at or below $10, 8% above. The lower rate at higher prices reflects how price-sensitive the category is despite its premium nature.

The defining feature of Baby Products is the safety compliance overhead. CPSIA (Consumer Product Safety Improvement Act) requirements apply to almost everything: testing certifications, lot tracking, product safety documentation, and mandatory recalls when issues are discovered. The compliance burden is real and any seller in this category needs a documented quality process.

For private label brands, Baby Products is one of the strongest opportunities because consumer trust drives premium pricing — but the entry cost is high because compliance isn't optional. For arbitrage and wholesale, brand authorization is the gating factor, and many baby brands restrict third-party sellers aggressively.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Bottles, accessories
- Large standard (1-3 lbs): $5.40 — Most baby gear
- Small oversized: $9.73 — Strollers, larger gear

Restrictions: CPSIA compliance is mandatory. Many brands gate distribution.
Source: https://sellervault.io/fba-fees/baby

### Beauty & Personal Care
Referral fee: 8% (minimum $0.30 per item).
Referral fee 8% on items above $10, 15% below — sub-$10 beauty items have a lower break-even threshold.

Beauty & Personal Care uses a tiered referral fee: 15% on the portion of the price at or below $10, and 8% on the portion above. The dual-rate structure favors lower-priced beauty items, making it one of the few categories where a $9 product has a meaningfully lower percentage referral fee than a $25 product would.

Fulfillment fees are mostly standard-size because beauty products are physically small and lightweight. Skincare, makeup, and small grooming tools land in the small-standard or large-standard tiers almost universally.

The operational reality of beauty selling is that brand approval and ungating are the main barrier to entry, not the fee schedule. Many beauty brands gate distribution, and Amazon enforces brand approval for many subcategories. Sellers without brand authorization often cannot list at all.

FBA fulfillment fees (standard size):
- Small standard (≤ 4 oz): $3.06 — Lipstick, small skincare
- Small standard (≤ 1 lb): $3.27 — Most beauty SKUs
- Large standard (1-2 lbs): $4.75 — Larger sets, gift packs

Restrictions: Many beauty subcategories are gated. Brand authorization or invoice proof is typically required for approval.
Source: https://sellervault.io/fba-fees/beauty-and-personal-care

### Books
Referral fee: 15% (minimum $0.00 per item).
Books use a fixed referral fee structure (15% + variable closing fee). FBA fulfillment for books has its own dedicated tier.

Books are the original Amazon category and have their own dedicated fee structure. The referral fee is 15%, but books also pay a fixed Variable Closing Fee on each sale (currently $1.80) on top of the percentage. This is the only major category that still uses the variable closing fee — Amazon removed it from most other categories years ago.

Fulfillment fees for books are slightly different from general media because of the dimensional consistency: most books fit in the small standard tier, and the fee schedule is optimized for that. Heavy textbooks and large coffee table books push into the large standard or even oversized tiers.

For used book sellers, the math gets more interesting because COGS is often very low and the question is whether margin per book justifies the fixed per-sale fees ($1.80 closing fee + ~$3.10 fulfillment fee = nearly $5 in fees per unit). Used books selling under $10 often barely break even after all fees.

FBA fulfillment fees (standard size):
- Small standard book (≤ 1 lb): $3.13 — Most paperbacks
- Large standard book (1-3 lbs): $4.50 — Hardcover and textbooks
- Large standard book (3-20 lbs): $6.85 — Coffee table and reference books

Category-specific fees: $1.80 Variable Closing Fee per sale (the only major category that still uses this).
Source: https://sellervault.io/fba-fees/books

### Cell Phone Devices
Referral fee: 8% (minimum $0.30 per item).
Referral fee 8% on unlocked phones and devices — one of Amazon's lowest rates — with a $0.30 minimum and low, weight-light fulfillment fees.

Cell Phone Devices (unlocked phones and similar handsets) sits at an 8% referral fee, one of the lowest on the platform alongside Electronics and Computers. On a $400 unlocked phone that's a $32 referral fee versus the $60 a 15% category would charge — a meaningful spread on high-velocity, thin-margin hardware.

Note the boundary: this 8% rate is for the device itself. Cell phone accessories (cases, chargers, cables) fall under a different schedule and are typically charged the standard 15%, so make sure your ASINs are classified correctly before you price. Fulfillment is cheap here because phones are small and light — most ship in the small-standard or low large-standard tiers — so the size profile rarely erodes the referral-fee advantage.

For sellers, the 8% rate makes devices attractive on paper, but the category is fiercely competitive and brand-gated. Counterfeit enforcement is aggressive, carrier-locked and grey-market inventory causes suspensions, and many handset brands restrict third-party sellers entirely. Treat authorization and authenticity documentation as the real cost of entry.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Most unlocked phones
- Large standard (1-3 lbs): $5.40 — Phones with bundled accessories

Category-specific fees: The 8% rate applies to devices only — cell phone accessories are charged the standard 15%.; Lithium batteries inside devices carry hazmat handling considerations.

Restrictions: Brand-gated and counterfeit-enforced; carrier-locked or grey-market inventory risks suspension.
Source: https://sellervault.io/fba-fees/cell-phones

### Electronics
Referral fee: 8% (minimum $0.30 per item).
Referral fee 8% on items above $100, fulfillment fees vary by weight tier. Most electronics fall in standard or large standard size.

Electronics is one of the lower-referral-fee categories on Amazon, with an 8% rate on the portion of the price above $100 (and 15% on the portion at or below $100, capped at $1.20 minimum). The lower rate reflects how price-sensitive electronics buyers are and how thin margins typically run.

Fulfillment fees for electronics depend heavily on weight and dimensions: a small phone accessory ships at the lowest-tier fee, while a 5-pound Bluetooth speaker pays the large-standard rate. Most electronics that fit in a hand-carry box land in the small or large standard tiers.

For sellers, electronics is the category where dimensional accuracy matters most. A weight or dimension error of even a few ounces or inches can push the unit into the next fulfillment tier and silently inflate per-unit cost on every single sale. Always verify Amazon's recorded dimensions against your physical units.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Phone accessories, small chargers
- Large standard (1-2 lbs): $4.75 — Headphones, smart speakers
- Large standard (2-3 lbs): $5.40 — Tablets, larger speakers
- Large standard (3-20 lbs): $6.85 — Most consumer electronics

Category-specific fees: Lithium battery hazmat surcharge applies to many electronics — adds operational friction even when no extra fee.; Returns rate in electronics is higher than most categories; factor a 5-10% return rate into margin math.

Restrictions: Many electronics subcategories require approval (Brand Registry, gating). Cell phones, accessories, and headphones are usually open; smart home and high-value brands often require approval.
Source: https://sellervault.io/fba-fees/electronics

### Furniture
Referral fee: 15% (minimum $0.30 per item).
Tiered referral fee: 15% on the portion up to $200 and 10% on the portion above, with a $0.30 minimum — and almost everything ships in expensive oversized tiers.

Furniture uses a tiered referral fee: 15% on the portion of the price at or below $200, and 10% on the portion above $200. A $500 sofa therefore pays 15% on the first $200 ($30) plus 10% on the remaining $300 ($30) for a $60 referral fee — an effective rate of 12% that keeps dropping as price rises, rewarding higher-ticket pieces.

Fulfillment, not the referral fee, is the dominant cost in furniture. The category is defined by bulk: most items land in medium or large oversized tiers where a single unit's fulfillment fee can run from $19 to $90+, and storage on cubic-foot-heavy inventory is punishing — especially during the Q4 October-December peak storage window. Dimensional and weight accuracy is non-negotiable here.

For sellers, furniture's declining effective referral rate favors premium price points, but the math only works if you control fulfillment and storage. Many sellers run furniture FBM or via Amazon's ships-in-own-container / SIPP programs to dodge oversized FBA fees. Damage-in-transit returns are costly, so packaging quality directly affects profitability.

FBA fulfillment fees (standard size):
- Large standard (3-20 lbs): $6.85 — Small accent pieces, stools
- Small oversized: $9.73 — Side tables, small chairs
- Medium oversized: $19.05 — Dressers, dining chairs, desks
- Large oversized: $89.98 — Sofas, sectionals, bed frames

Category-specific fees: Tiered referral: 15% on the portion up to $200, 10% on the portion above $200.; Oversized storage fees and Q4 peak surcharges dominate total cost; consider FBM or SIPP for bulky items.
Source: https://sellervault.io/fba-fees/furniture

### Grocery & Gourmet Food
Referral fee: 8% (minimum $0.30 per item).
Referral fee 8% on items above $15, 15% below. Expiration date tracking and short shelf life add operational complexity.

Grocery & Gourmet Food uses a dual-rate referral fee: 15% on the portion of the price at or below $15, and 8% on the portion above. The structure favors higher-priced gourmet items over commodity grocery.

The operational complexity is shelf life. Amazon enforces expiration date requirements on most grocery items: products with less than 90 days of shelf life cannot be inbound to FBA, and Amazon will dispose of inventory whose expiration date passes during storage. This means inventory turnover discipline is non-negotiable in grocery — slow movers don't just sit there costing storage fees, they get destroyed.

For sellers, the right grocery strategy is high-velocity SKUs only with tight inventory turnover, OR specialty/niche items with long shelf life (dried goods, candy, packaged snacks with 12-24 month expiration). Anything in between tends to lose money to expiration disposal.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Snacks, candy
- Large standard (1-3 lbs): $5.40 — Most grocery items
- Large standard (3-20 lbs): $6.85 — Larger food items

Category-specific fees: Expiration date enforcement: less than 90 days remaining at inbound = rejected.; Inventory disposal on expiration is automatic and irreversible.
Source: https://sellervault.io/fba-fees/grocery

### Health & Household
Referral fee: 8% (minimum $0.30 per item).
Referral fee 8% on items above $10, 15% below — same dual-tier structure as beauty.

Health & Household uses the same dual-rate referral fee structure as Beauty & Personal Care: 15% on the portion of the price at or below $10, and 8% on the portion above. The lower rate above $10 makes mid-priced health products noticeably more profitable than the same product at half the price would be.

Fulfillment fees are mostly standard-size — vitamins, supplements, OTC medications, and cleaning supplies all fit comfortably in the small or large standard tiers. The operational friction in Health & Household is regulatory: many subcategories require FDA approval documentation, expiration date tracking, and lot number management.

For private label brands in supplements and skincare, this category is one of the most heavily regulated and one of the most rewarding when managed correctly. Brand registration is essential, content compliance is non-negotiable, and ingredient claims need to match approved labeling.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Vitamins, OTC, small care
- Large standard (1-3 lbs): $5.40 — Larger supplements, cleaning
- Large standard (3-20 lbs): $6.85 — Bulk cleaning supplies

Restrictions: Many subcategories require FDA documentation, expiration tracking, and lot number management.
Source: https://sellervault.io/fba-fees/health-and-household

### Home & Kitchen
Referral fee: 15% (minimum $0.30 per item).
Referral fee 15% across most home & kitchen products, fulfillment fees scale with size — oversized items pay substantially more.

Home & Kitchen is one of the largest categories on Amazon and uses the standard 15% referral fee rate. Most products fall in the standard-size or large-standard fulfillment tiers, but home goods are also where the oversized tier becomes common: anything bigger than ~18 inches on the longest side or heavier than 20 lbs ships at oversized rates.

The oversized fee schedule is materially different from standard fees. A 25-pound bookshelf pays 5-10x the fulfillment fee of a 1-pound kitchen gadget. For sellers in this category, the right framework is: standard-size SKUs are bread-and-butter, oversized SKUs need higher unit margins to justify the fulfillment cost, and anything pushing into the "special oversized" tier should be evaluated against FBM as an alternative.

Storage fees in Home & Kitchen also bite hard during Q4 because the SKUs tend to be physically larger. Plan inventory levels with the Q4 storage surcharge in mind — 3x the September rate, October through December.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Kitchen gadgets, small organizers
- Large standard (1-3 lbs): $5.40 — Cookware, small appliances
- Large standard (3-20 lbs): $6.85 — Stand mixers, larger cookware
- Small oversized: $9.73 — Bookshelves, room fans
- Medium oversized: $19.05 — Larger furniture, vacuum cleaners
- Large oversized: $89.98 — Sofas, large rugs, big-box items
Source: https://sellervault.io/fba-fees/home-and-kitchen

### Industrial and Scientific
Referral fee: 12% (minimum $0.30 per item).
Referral fee 12% — below the 15% default — with a $0.30 minimum, covering B2B, lab, MRO, and janitorial supplies.

Industrial and Scientific (Amazon Business, MRO, lab, and janitorial supplies) carries a 12% referral fee, below the 15% default. The discount reflects the category's B2B, bulk-purchase orientation where buyers are price-conscious and order in volume.

Fulfillment spans a wide range. Small consumables (gloves, fasteners, reagents) sit in the cheap standard tiers, while equipment, drums, and machinery push into oversized territory with much higher fees. Because the category mixes tiny high-margin parts with heavy low-margin bulk, blended fee analysis per ASIN matters more here than in most categories.

For sellers, Industrial and Scientific pairs well with an Amazon Business strategy — quantity discounts, business-only pricing, and tax-exempt buyers drive repeat volume. The 12% referral rate plus B2B stickiness can make for durable margins, but watch for hazmat-classified chemicals and compliance documentation (SDS sheets, certifications) that many industrial products require.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Fasteners, gloves, small reagents
- Large standard (1-3 lbs): $5.40 — Hand tools, lab glassware
- Large standard (3-20 lbs): $6.85 — Pumps, motors, janitorial supplies
- Small oversized: $9.73 — Drums, larger equipment

Category-specific fees: Chemicals and reagents often carry hazmat designations requiring SDS documentation.

Restrictions: Many scientific and chemical products are gated or hazmat-restricted.
Source: https://sellervault.io/fba-fees/industrial-and-scientific

### Jewelry
Referral fee: 20% (minimum $5.00 per item).
Tiered referral fee: 20% on the portion up to $250 and just 5% above, with a $5 minimum referral fee that makes cheap pieces uneconomic.

Jewelry uses one of Amazon's steepest tiered referral schedules: 20% on the portion of the price at or below $250, and 5% on the portion above $250. A $1,000 ring pays 20% on the first $250 ($50) plus 5% on the remaining $750 ($37.50) for $87.50 total — an effective rate of about 8.75% that keeps falling as price climbs, strongly favoring high-ticket pieces.

The critical gotcha is the minimum referral fee: Jewelry carries a $5.00 minimum per item rather than the usual $0.30. That floor makes low-priced jewelry brutal — on a $10 pendant the $5 minimum is an effective 50% referral fee — so the category economics only work above roughly $25-30 per unit. Fulfillment, by contrast, is trivial: jewelry is tiny and light and almost always falls in the small-standard tier.

For sellers, jewelry rewards premium price points and punishes cheap volume plays. Counterfeit and authenticity enforcement is aggressive, fine jewelry is approval-gated, and precious-metal/gemstone documentation is expected. Treat the $5 minimum and the 20%/5% tier breakpoint as the two numbers that decide whether a given ASIN is worth listing.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Rings, necklaces, earrings

Category-specific fees: Tiered referral: 20% on the portion up to $250, 5% on the portion above $250.; Minimum referral fee is $5.00 per item (not $0.30) — low-priced jewelry is uneconomic.

Restrictions: Fine jewelry is approval-gated; authenticity and precious-metal documentation enforced.
Source: https://sellervault.io/fba-fees/jewelry

### Office Products
Referral fee: 15% (minimum $0.30 per item).
Referral fee 15%. Office supplies are largely standard-size and predictable on fees.

Office Products uses the standard 15% referral fee with no surprises. The category is dominated by small standard-size items: writing supplies, paper goods, desk accessories, basic electronics like calculators. Fulfillment fees are predictable and the storage profile is favorable because office goods are usually compact.

The main operational consideration is competition. Office Products is highly competitive with razor-thin margins on commodity SKUs. Branded specialty items (high-end pens, premium organizers, niche office accessories) work better than commodity items where Amazon Basics and other private labels have crushed pricing.

For wholesale sellers, Office Products is a workable category for B2B-style accounts where the margins per unit are small but volume is consistent. Arbitrage in Office Products is generally not profitable because the commodity nature of most SKUs means thin spreads even at retail markdowns.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Pens, paper, accessories
- Large standard (1-3 lbs): $5.40 — Larger desk items
- Large standard (3-20 lbs): $6.85 — Office equipment
Source: https://sellervault.io/fba-fees/office-products

### Pet Supplies
Referral fee: 15% (minimum $0.30 per item).
Referral fee 15%. Toys, leashes, and grooming hit standard fees; pet beds and large food bags push into oversized.

Pet Supplies uses the standard 15% referral fee. Most pet supplies — toys, leashes, treats, grooming tools — fall into standard-size fulfillment tiers. The exceptions are pet beds (often oversized due to bulk), large bags of food, and crates/carriers, which push into the oversized fee tiers.

The category is one of the steadiest performers on Amazon because pet ownership doesn't fluctuate seasonally. Sales are remarkably consistent month-to-month, which makes inventory forecasting easier than in seasonal categories. Subscribe & Save penetration in Pet Supplies is also higher than most categories, which provides predictable repeat revenue for sellers who can win the recurring purchase.

Branded pet food has stricter listing requirements and brand approval; commodity pet accessories are largely open to new sellers. Private label opportunities in Pet Supplies remain strong, particularly in mid-tier "premium but not super-premium" positioning.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Toys, treats
- Large standard (1-3 lbs): $5.40 — Grooming tools, accessories
- Large standard (3-20 lbs): $6.85 — Larger toys, smaller carriers
- Small oversized: $9.73 — Pet beds, large food bags
Source: https://sellervault.io/fba-fees/pet-supplies

### Shoes, Handbags, and Sunglasses
Referral fee: 15% (minimum $0.30 per item).
Referral fee 15%, but handbags and sunglasses priced $75+ jump to 18%; $0.30 minimum, with footwear charged on a separate apparel storage schedule.

Shoes, Handbags, and Sunglasses carries a 15% referral fee as the headline rate, but there's a price-sensitive twist: for handbags and sunglasses priced at $75 or above, the referral fee rises to 18% on the full price. Footwear stays at a flat 15% regardless of price. That $75 breakpoint on bags and eyewear is a real pricing cliff — crossing it costs an extra 3 points on the entire sale, not just the portion above $75.

Fulfillment is straightforward and weight-light: most shoes, bags, and eyewear ship in the small-standard or large-standard tiers. Footwear, however, is billed on Amazon's separate apparel/footwear storage schedule inside the fee engine, which differs from the standard cubic-foot rate — worth modeling if you carry deep inventory.

For sellers, the takeaway is to price handbags and sunglasses deliberately around the $75 line and to account for high return rates, which are structurally elevated across fashion (fit, color, and style returns). The 15%/18% split plus returns means net margin can diverge sharply from the gross figure.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Sunglasses, small clutches
- Large standard (1-3 lbs): $5.40 — Most shoes and handbags
- Large standard (3-20 lbs): $6.85 — Boots, large totes

Category-specific fees: Handbags and sunglasses priced $75 or above are charged 18% (on the full price); footwear stays at 15%.; Footwear is billed on Amazon's separate apparel/footwear storage schedule.
Source: https://sellervault.io/fba-fees/shoes-handbags-and-sunglasses

### Sports & Outdoors
Referral fee: 15% (minimum $0.30 per item).
Referral fee 15%. Wide range of fulfillment tiers — from compression sleeves to kayaks.

Sports & Outdoors uses the standard 15% referral fee. The category spans an enormous range of physical sizes: small fitness accessories, mid-sized sports equipment, and very large outdoor goods (kayaks, basketball hoops, exercise machines). The fulfillment fee tier you land in depends entirely on which segment of the category you operate in.

For small accessories (resistance bands, water bottles, fitness gear), standard-size fulfillment fees apply and the math works like other small-goods categories. For larger equipment, oversized tiers kick in fast. The largest items in this category often push into FBM territory because oversized FBA fees would consume most of the unit margin.

Seasonality matters in Sports & Outdoors — summer goods sell heavily April-August, winter gear October-February. The Q4 surcharge is less catastrophic here than in Toys because most sports gear sells outside the November-December window.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Accessories, supplements
- Large standard (1-20 lbs): $6.85 — Most equipment
- Small oversized: $9.73 — Larger equipment
- Medium oversized: $19.05 — Bicycles, large equipment
- Large oversized: $89.98 — Kayaks, hoops, exercise machines
Source: https://sellervault.io/fba-fees/sports-and-outdoors

### Tools and Home Improvement
Referral fee: 15% (minimum $0.30 per item).
Referral fee 15% with a $0.30 minimum; fulfillment is dominated by weight, with heavy power tools and hardware tipping into oversized tiers.

Tools and Home Improvement sits at the standard 15% referral fee with a $0.30 minimum. There's no tiered structure or category discount, so referral cost is predictable — the variable that decides profitability here is fulfillment, not the referral rate.

The category is weight- and bulk-heavy. Hand tools and hardware are light and cheap to fulfill, but power tools, ladders, and building materials are dense and frequently push into the oversized tiers where fees jump from ~$6.85 to $19+ per unit. Dimensional weight matters: a boxed power tool or a bundle of fasteners can be billed on volume rather than scale weight, so accurate cubic measurements protect margin.

For sellers, Tools and Home Improvement is a durable, high-intent category with strong repeat demand, but it's competitive and brand-gated at the top (DeWalt, Milwaukee, Bosch restrict third-party sellers). Watch for hazmat items — adhesives, solvents, batteries, and aerosols are common and add handling fees and storage constraints.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Bits, fasteners, small hand tools
- Large standard (1-3 lbs): $5.40 — Wrenches, drills, hardware kits
- Large standard (3-20 lbs): $6.85 — Power tools, larger toolsets
- Small oversized: $9.73 — Ladders, longer tools
- Medium oversized: $19.05 — Workbenches, building materials

Category-specific fees: Adhesives, solvents, aerosols, and lithium batteries trigger hazmat handling fees.

Restrictions: Top tool brands are frequently gated; some chemicals are hazmat-restricted.
Source: https://sellervault.io/fba-fees/tools-and-home-improvement

### Toys & Games
Referral fee: 15% (minimum $0.30 per item).
Referral fee 15%. Q4 storage surcharges hit Toys & Games harder than any other category — plan inventory carefully.

Toys & Games uses the standard 15% referral fee. The category is dominated by Q4 sales — most toys do 30-50% of their annual volume in October-December, and Amazon's Q4 storage surcharges (which apply to ALL FBA inventory October through December) hit Toys & Games hardest because sellers need to stockpile ahead of the rush.

The operational discipline that separates profitable Toys sellers from unprofitable ones is the Q4 inventory ramp. You need to be in stock for Black Friday through Christmas without overshooting and getting stuck with January slow movers paying high storage fees.

Fulfillment fees vary by toy size — small board games and action figures hit standard-size fees, larger ride-on toys and bulky play sets push into oversized. Anything with batteries also deals with the same hazmat operational friction electronics deals with.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Action figures, small games
- Large standard (1-3 lbs): $5.40 — Most board games
- Large standard (3-20 lbs): $6.85 — Larger toys
- Small oversized: $9.73 — Bulky play sets
- Medium oversized: $19.05 — Ride-on toys, large playsets

Category-specific fees: Q4 storage surcharge (Oct-Dec) is approximately 3x the standard rate for standard-size items.; Battery-powered toys may require hazmat compliance.
Source: https://sellervault.io/fba-fees/toys-and-games

### Watches
Referral fee: 16% (minimum $2.00 per item).
Tiered referral fee: 16% on the portion up to $1,500 and just 3% above, with a $2 minimum — luxury watches see a very low effective rate.

Watches use a tiered referral fee designed for high-ticket goods: 16% on the portion of the price at or below $1,500, and 3% on the portion above $1,500. A $5,000 watch pays 16% on the first $1,500 ($240) plus 3% on the remaining $3,500 ($105) for $345 total — an effective rate of about 6.9% that keeps dropping as price rises. The structure makes Amazon competitive for luxury timepieces in a way flat-rate categories never are.

The minimum referral fee here is $2.00 per item rather than $0.30, which lightly penalizes very cheap watches but rarely binds at typical price points. Fulfillment is trivial — watches are small and light and ship in the small-standard tier — so the entire fee story is the referral structure.

For sellers, watches reward premium and luxury price points where the 3% marginal rate dominates. The flip side is heavy gating and authenticity enforcement: brand-name and luxury watches are approval-restricted, counterfeit policing is aggressive, and grey-market inventory invites suspension. Authorization is the gate, and the $1,500 breakpoint is the number that defines the category's margin math.

FBA fulfillment fees (standard size):
- Small standard (≤ 1 lb): $3.27 — Most watches, boxed

Category-specific fees: Tiered referral: 16% on the portion up to $1,500, 3% on the portion above $1,500.; Minimum referral fee is $2.00 per item (not $0.30).

Restrictions: Luxury and brand-name watches are approval-gated; authenticity enforced and grey-market inventory risks suspension.
Source: https://sellervault.io/fba-fees/watches

---

## In-Depth Guides (8)

### The Complete Amazon PPC Guide
Last updated 2026-06-22. A practical, end-to-end guide to Amazon PPC for FBA sellers: Sponsored Products, Brands, and Display ad types; ACoS and TACoS math; bidding strategies; campaign structure; keyword research; and the weekly optimization loop that turns ad spend into profitable, defensible market share.

Amazon PPC (pay-per-click advertising) is no longer optional for FBA sellers — it is the primary lever for launching products, defending market share, and accelerating organic rank. Every search result page on Amazon now mixes sponsored placements with organic listings, which means a product with no ad presence is effectively invisible for its most valuable keywords. The sellers who win are not the ones who spend the most; they are the ones who spend with intent, measure relentlessly, and feed the data from advertising back into pricing, inventory, and listing decisions.

This guide walks through the entire Amazon Ads stack as it works in 2026: the three ad products (Sponsored Products, Sponsored Brands, and Sponsored Display), the two metrics that actually run your business (ACoS and TACoS), the bidding strategies and placement adjustments that control your cost per click, and the campaign architecture that keeps discovery and harvesting cleanly separated. We close with a repeatable weekly optimization routine and the operational mistakes that quietly burn budget.

The operations-first philosophy behind SellerVault applies directly here: advertising is a system, not a set-and-forget toggle. A bid is only as good as the margin behind it, and an ACoS target only makes sense when you know your true cost of goods and current price. Treat PPC as one connected loop with your repricing and restock decisions, and the same ad dollar does far more work.

#### Why Amazon PPC Matters
Amazon is a closed search engine where the buyer intent is already commercial — people arrive ready to purchase, not to browse. That makes paid placement unusually efficient compared to other channels, but it also means competition is fierce and the auction is unforgiving. **Roughly the top of every search results page is paid**, so for high-volume keywords your organic listing may sit below several sponsored competitors. PPC buys you a seat at the table while you earn organic rank.

There is also a flywheel effect. Sales driven by ads count toward Amazon's sales-velocity and conversion signals, which feed **organic rank**. A well-run launch campaign can lift a product into page-one organic positions for its core keywords, at which point you can throttle ad spend back and let organic sales carry the volume. This is why PPC and organic strategy can never be planned in isolation.

Finally, advertising data is the cleanest demand signal Amazon will ever give you. Your Search Term Report shows exactly which queries customers used, which converted, and at what cost. That intelligence should flow into your listing copy, **backend-keywords**, pricing, and even your restock forecasting — not just back into more bids.

#### The Three Amazon Ad Types
Amazon Ads is built around three core products, each serving a different role in the funnel.

**Sponsored Products (SP)** are the workhorse. They appear in the main search results and on product detail pages, look almost identical to organic listings, and drive the large majority of most sellers' ad sales. SP supports keyword targeting (exact, phrase, broad) and product/ASIN targeting, plus an automatic-targeting mode where Amazon matches your ad to queries it deems relevant. Start here; for many sellers SP alone is 80–90% of the advertising program.

**Sponsored Brands (SB)** require an enrolled brand (Brand Registry) and appear as banner-style ads at the top of search, typically featuring your logo, a custom headline, and multiple products — or as a Brand Store spotlight or a Sponsored Brands Video. SB is the tool for top-of-funnel brand awareness, defending branded search, and conquesting competitor terms. The video format in particular tends to earn outsized click-through and is worth testing on your hero keywords.

**Sponsored Display (SD)** targets audiences rather than just search queries. It can retarget shoppers who viewed your product but didn't buy, target by shopper interests, or place ads on competitor detail pages (and defend your own). SD reaches both on and off Amazon. Use it for retargeting warm audiences and for defensive placement on your own listings so competitors can't poach your traffic. SD is usually the smallest slice of spend but punches above its weight on retargeting ROI.

#### ACoS and TACoS: The Metrics That Run Your Business
Two metrics matter more than any other. **ACoS (Advertising Cost of Sale)** measures the efficiency of the ad campaign itself:

```
ACoS = (Ad Spend / Ad-Attributed Sales) x 100
```

If you spent \$200 on ads and those ads generated \$1,000 in sales, your ACoS is 20%. ACoS answers "how efficient is this campaign?" Its inverse is **RoAS** (Return on Ad Spend = Ad Sales / Ad Spend), which says the same thing from the revenue side.

**TACoS (Total Advertising Cost of Sale)** is the metric that actually tells you whether your business is healthy:

```
TACoS = (Ad Spend / Total Sales) x 100
```

Total Sales here means organic **plus** advertising revenue. TACoS reveals how dependent your total revenue is on ad spend. A **falling TACoS while total sales rise** is the gold standard — it means your ads are pulling up organic sales and your product is becoming self-sustaining. A rising TACoS means you are buying growth, which is fine during a launch but dangerous as a steady state.

The single most important concept is the **break-even ACoS**, which equals your contribution **margin** before ad spend. If your product nets 35% after COGS, Amazon fees, and shipping, then a 35% ACoS means that sale broke even on a pure-ad basis. You want target ACoS comfortably below break-even on harvest campaigns, and you can tolerate ACoS at or above break-even on launch campaigns because the organic lift (captured by TACoS) makes the unprofitable-looking ad sale profitable overall. As a rough 2026 benchmark: **15–25% ACoS is strong for mature products, 20–30% is healthy during growth, and 30–50% is acceptable during launch**, while TACoS in the **8–15%** band is typical for a steady-state catalog.

#### Bidding Strategies and Placement Adjustments
Your bid is the maximum **CPC** you're willing to pay, but the strategy you attach to a campaign changes how Amazon flexes that bid in real time. Sponsored Products offers three strategies:

- **Dynamic bids – down only:** Amazon lowers your bid in real time when a click looks unlikely to convert, but never raises it. This is the safest default and the right starting point for new campaigns and tight budgets.
- **Dynamic bids – up and down:** Amazon will *raise* your bid by up to **100% for Top of Search placements and up to 50% for other placements** when it predicts a conversion, and lower it when it doesn't. This drives more conversions but can roughly double your effective spend on a click — only use it on campaigns with a proven conversion rate where you can absorb the cost spikes.
- **Fixed bids:** Amazon uses your exact bid for every auction with no real-time adjustment. Useful for maximizing impressions during a deliberate launch push or for clean A/B testing of bid levels, but it spends inefficiently on low-intent clicks.

On top of strategy, you can set **placement multipliers** — percentage increases applied to Top of Search, Rest of Search, and Product Pages. Top of Search converts best for most products, so a common tactic is to keep a conservative base bid with down-only bidding and then apply a Top-of-Search multiplier to concentrate spend where it converts. Adjust multipliers based on the placement report, not guesswork.

A disciplined approach: launch new campaigns on **down-only** to gather clean data, identify your converting placements and search terms, then graduate proven campaigns to **up-and-down** with a Top-of-Search multiplier to scale the winners aggressively.

#### Campaign Structure That Scales
A messy account is the number-one reason sellers can't optimize — when discovery and harvesting share a campaign, you can't cleanly read what's working. The 2026 winning structure **separates campaigns by purpose** and never blends branded with non-branded.

The canonical SP architecture is the **discovery-to-harvest funnel**:

1. **Auto campaign (discovery):** Amazon's automatic targeting finds new, relevant search terms you didn't think of. Keep bids modest; its job is to *mine* terms, not to consume budget.
2. **Broad/phrase manual campaign (testing):** Seed it with your researched keywords and let broad and phrase match surface variations and long-tail queries.
3. **Exact match manual campaign (harvest):** Your proven, high-converting search terms live here at higher bids. This is where you concentrate spend because the intent is known and the conversion rate is reliable.

The mechanism that moves terms downstream is the **promote-and-negate** loop (covered in the optimization section). Beyond this core funnel, mature accounts run **separate campaigns for branded defense** (cheap clicks on your own brand name, defended against conquesting), **competitor/category conquesting** (ASIN and category targeting), and **launch vs. scale vs. defense** segments so budgets and ACoS targets can be set independently. Use a consistent naming convention — for example `SP_Exact_HeroKW_Harvest` — so the account stays readable as it grows to dozens of campaigns. One ad group per tight keyword theme keeps bids and negatives manageable; do not dump 200 unrelated keywords into a single ad group.

#### Keyword Strategy and Match Types
Good advertising starts with good **keyword-research**. Build your seed list from three sources: the terms Amazon's autocomplete suggests, the keywords your top competitors rank for (reverse-ASIN tools), and — most valuable of all — the converting search terms from your own auto campaigns and Search Term Report. The latter is real demand data, not estimates.

Match types control the tradeoff between reach and precision:

| Match type | Reach | Control | Best for |
|---|---|---|---|
| **Broad** | Highest | Lowest | Discovering new keywords and variations |
| **Phrase** | Medium | Medium | Controlled discovery around a known phrase |
| **Exact** | Lowest | Highest | Maximizing efficiency on proven performers |

Use broad and phrase to *discover*, and exact to *harvest*. A converting search term should always end up isolated in an exact-match ad group where you can bid it precisely.

Don't neglect **product (ASIN) targeting**, which is separate from keywords. You can target individual competitor ASINs (place your ad on their detail page), entire categories with price and rating refinements, and your own catalog for cross-sell and defense. ASIN targeting is often more profitable than keyword targeting because you're reaching shoppers at the moment of comparison. Finally, balance **branded vs. non-branded** spend deliberately: branded terms are cheap and convert extremely well but mostly capture demand you'd win organically, while non-branded terms cost more but grow genuinely new market share. Track them in separate campaigns so one doesn't flatter the other's ACoS.

#### Negative Keywords and Search Term Mining
Negative keywords are how you stop wasting money, and they are the single highest-ROI optimization most sellers under-use. Every week, pull your **Search Term Report** and look for terms that spent money without converting, terms that are irrelevant to your product, and terms that are converting so well they deserve their own campaign.

The core workflow is the **promote-and-negate loop**: when a search term proves itself in a low-control campaign (auto or broad), you (1) add it as an **exact-match keyword** in your harvest campaign at a deliberate bid, and simultaneously (2) add it as a **negative exact** in the original discovery campaign. This forces the term's budget into the campaign where you control its bid, and frees the discovery campaign to keep finding *new* terms instead of re-spending on ones you've already validated. Without this loop, your auto campaign cannibalizes your manual campaigns and your data becomes uninterpretable.

For pure waste, **always start with negative exact** rather than negative phrase. Negative exact blocks only the specific non-converting term; negative phrase is a blunter instrument that can silently suppress profitable variations. Only escalate a pattern to **negative phrase** after you've confirmed it spends without converting across multiple Search Term Report cycles. A common, costly mistake is negative-phrasing a word like "free" or a competitor brand too aggressively and killing converting long-tail traffic you never noticed. Review negatives weekly, but add them surgically.

#### The Weekly Optimization Loop and Advanced Tactics
PPC rewards consistency over cleverness. Run the same loop every week and the account compounds.

1. **Pull the data:** Search Term Report, placement report, and campaign-level ACoS/TACoS trend.
2. **Harvest winners:** promote converting search terms to exact-match harvest campaigns and negate them in discovery.
3. **Cut waste:** add negative exacts for spend-without-conversion terms; pause keywords whose ACoS is far above target with enough clicks to be statistically meaningful (a rough rule: at least 10–15 clicks, or ~2x your conversion rate in clicks, before judging).
4. **Adjust bids:** raise bids on profitable, impression-starved keywords; lower bids on keywords above target ACoS. Move in small steps (10–20%), not wild swings.
5. **Tune placements:** apply or adjust Top-of-Search multipliers based on the placement report.

**Dayparting** (scheduling) is a worthwhile advanced lever once you have data: if your conversion rate collapses at 2 a.m., reduce bids or pause campaigns during dead hours and reallocate to peak windows. Many sellers run rules-based dayparting to protect budget overnight.

The most important advanced principle is that **ACoS targets are margin-derived, not universal**. A 30% ACoS is a disaster on a 25%-margin product and a bargain on a 60%-margin one. This is why advertising can't be separated from your true unit economics: when your price changes (through repricing) or your COGS shifts, your break-even ACoS moves with it, and bids that were profitable yesterday may be losing money today. Connecting your **ROI** and margin data directly into bid decisions — rather than chasing a fixed ACoS number — is what separates a profitable program from a busy one.

#### Common PPC Mistakes That Burn Budget
Most wasted ad spend traces back to a handful of avoidable errors.

- **Optimizing ACoS in isolation.** Chasing a low ACoS can starve a launch and stall organic rank. Watch TACoS and total-sales trend together; sometimes a temporarily high ACoS is buying durable organic position.
- **Set-and-forget bidding.** The auction shifts constantly as competitors enter and exit. A campaign you haven't touched in a month is almost certainly mis-bid in both directions.
- **No negative keyword hygiene.** Without weekly negatives, your auto and broad campaigns quietly hemorrhage money on irrelevant queries.
- **Blending branded and non-branded.** Branded terms make any campaign's ACoS look great and hide non-branded inefficiency. Always isolate them.
- **Judging keywords too early.** Pausing or scaling a keyword on two or three clicks is noise, not signal. Wait for a meaningful click sample before acting.
- **Ignoring inventory and price.** Driving aggressive ad traffic to a listing that's about to stock out wastes spend and tanks your conversion-rate signal; advertising into a price you can't profit at compounds the loss. Coordinate PPC with restock timing and pricing so the dollars you spend land on units you can actually sell at a margin.

The through-line: Amazon PPC is an operations problem as much as a marketing one. The sellers who treat bids, price, margin, and inventory as one connected system consistently outperform those who run advertising as a standalone dashboard.

Source: https://sellervault.io/guides/complete-amazon-ppc-guide

### The Complete Amazon Buy Box Guide
Last updated 2026-06-22. A practical, operations-first guide to the Amazon Buy Box (now the Featured Offer): what it is, how Amazon decides who wins it, the eligibility bar, the variables that actually move the needle (landed price, fulfillment, seller metrics, and stock), how rotation and sharing work, how repricing fits in, and why the Buy Box gets suppressed.

The Buy Box is the single most valuable piece of real estate on any Amazon product page. It is the box on the right-hand side of the detail page that holds the price, the **Add to Cart** button, and the **Buy Now** button. When a shopper clicks either button, the order routes to whichever seller currently "owns" the Buy Box for that listing. Roughly 82% of Amazon sales flow through it, so for most sellers the question is not whether to compete for the Buy Box but how to win it consistently and profitably.

Amazon renamed the Buy Box to the **Featured Offer** in late 2023, and the language on Seller Central now reflects that. The mechanics are the same, and most sellers still call it the Buy Box, so we use both terms interchangeably here. What has genuinely changed is the algorithm behind it: Amazon now weights fulfillment speed and seller health roughly as heavily as price, rotates multiple qualified sellers through the spot, and will happily feature a slightly more expensive offer that delivers a better overall customer experience.

This guide walks through how the Featured Offer is actually awarded, the eligibility floor you must clear, the four variable groups that decide the winner, how rotation and sharing work, where repricing fits, and why the Buy Box sometimes vanishes entirely. The goal is an operations-first mental model you can act on, not a list of myths about a secret algorithm.

#### What the Buy Box (Featured Offer) Actually Is
The Buy Box is the default purchase path on an Amazon detail page. Most listings on Amazon are shared: many different sellers can offer the same ASIN, and Amazon has to choose one offer to feature with the prominent **Add to Cart** and **Buy Now** buttons. That featured offer is the Buy Box. Every other seller of that ASIN is relegated to the much less visible "Other Sellers on Amazon" panel or the **See All Buying Options** page, which a small fraction of shoppers ever click.

Because the overwhelming majority of purchases happen through that one featured slot, owning the Buy Box is effectively the difference between making the sale and watching a competitor make it. This is why two sellers listing the identical product at the identical price can see wildly different sales volumes — the one who wins the Featured Offer captures almost all of the demand.

It is important to separate the Buy Box from organic search ranking. Search ranking decides whether a shopper finds the listing at all; the Buy Box decides who gets paid once they do. They influence each other — winning the Buy Box drives sales velocity, which feeds ranking — but they are governed by different signals. This guide is about the second problem: once a shopper is on the page, how do you become the offer they buy from?

For private-label sellers who are the only seller of their ASIN, the Buy Box is usually theirs by default and the concern is keeping it (avoiding suppression). For wholesale, arbitrage, and reseller businesses competing on shared ASINs, the Buy Box is a continuous, multi-seller contest that Amazon re-runs throughout the day.

#### How Amazon Decides Who Wins
Amazon awards the Featured Offer to the seller it believes will deliver the best overall shopping experience — not simply the lowest price. The exact algorithm is proprietary and Amazon never publishes the weights, but years of seller data and Amazon's own documentation make the inputs clear: price (specifically landed price), fulfillment method and speed, seller performance metrics, and inventory availability.

The critical shift in the modern algorithm is that price is necessary but rarely sufficient. The cheapest offer frequently does **not** win. A Prime-eligible FBA offer priced a few dollars higher routinely beats a cheaper FBM offer, because faster, more reliable delivery improves the customer experience that Amazon is optimizing for. Treat the algorithm as a weighted scoring model across several factors rather than a single price auction.

Amazon also re-evaluates Buy Box ownership continuously. On an active, competitive listing the algorithm can reassess every few minutes, which is why ownership can shift many times in a single day as prices, stock levels, and metrics change. This continuous re-evaluation is the mechanism behind both rotation (covered below) and the value of automated repricing.

The practical takeaway: optimize the whole offer, not one lever. A seller who fixes their account health and fulfillment can often win the Buy Box at a *higher* price than a competitor who only ever races the price down. That is the entire premise of an operations-first approach — margin lives in the non-price factors.

#### Buy Box Eligibility: The Floor You Must Clear
Before any of the winning factors matter, an offer has to be Buy Box eligible. Eligibility is a pass/fail gate; if you fail it, no amount of price optimization will surface your offer, and the listing will show no featured offer from you at all.

The core requirements are: a **Professional selling account** (the ~$39.99/month plan — Individual accounts are never Buy Box eligible), the item listed in **new condition** (used, refurbished, and collectible offers compete in their own separate Buy Boxes, not the main one), and **healthy account performance metrics**. FBA offers are generally granted eligibility automatically because Amazon controls the fulfillment, so the bar is most often a hurdle for FBM (merchant-fulfilled) sellers, who must additionally demonstrate sufficient order history and reliable shipping performance.

You can check eligibility per-SKU in Seller Central by adding the "Buy Box Eligible" column to your inventory view (it reads Yes/No). If a high-value SKU reads "No," that is the first and most important thing to fix — everything downstream is wasted effort until the offer is eligible.

Eligibility is not permanent. It is recalculated as your metrics move, so an account that slips on defect rate or late shipments can lose eligibility across many SKUs at once. Treat the eligibility gate as the foundation: clear it first, keep it clear, then compete on the winning factors.

#### Variable 1: Price and Landed Price
Price matters, but Amazon does not compare the sticker prices you set in Seller Central. It compares **landed price** — the item price plus shipping plus any handling or surcharges — calculated against the buyer's actual delivery address. A free-shipping FBA offer and an FBM offer with a $6 shipping charge are not competing at the same number even if the item price is identical.

This is the most common pricing mistake among newer sellers: undercutting a competitor on item price while still losing on landed price because the competitor ships free via FBA. When you analyze the competition, always reduce every offer to its landed total for a representative buyer, not its sticker. A repricer that understands landed price (and the fact that an FBA offer often gets a fulfillment "credit" against an equivalently priced FBM offer) is far more useful than one that races raw item prices to the bottom.

Price is also where margin discipline lives. Because Amazon weights non-price factors heavily, a strong account does **not** need to be the cheapest to win — it needs to be *competitive enough* that its fulfillment and seller-health advantages tip the decision. Chasing the absolute lowest price erodes margin for win-rate you could have captured several dollars higher.

Finally, price interacts with suppression (covered later): an offer priced well above the recent market or Amazon's reference price can lose the Buy Box for everyone on the listing, not just lose it to a competitor. Pricing strategy is therefore both a competitive lever and a defensive one.

#### Variable 2: Fulfillment Method and Speed
Fulfillment is one of the heaviest non-price factors. Amazon prioritizes **FBA** and **Seller Fulfilled Prime (SFP)** over standard FBM, because both put the offer in front of Prime members with fast, reliable, trackable delivery. On the same listing, all else equal, FBA offers typically see materially higher Buy Box win rates than FBM offers — commonly cited in the 15–25% range — purely on the strength of the fulfillment signal.

The reason is speed and reliability. Amazon's algorithm rewards faster promised delivery and penalizes slow handling. Since late 2025, Amazon has pushed handling-time expectations down toward a 0-day baseline on many categories, meaning FBM sellers who can't match same-day or next-day handling fall further behind on the fulfillment score. Geographic proximity to the buyer can also factor in, since it affects delivery speed.

For FBM sellers, the practical levers are: reduce handling time, offer faster shipping options, maintain a high valid-tracking rate, and hit on-time delivery consistently. Seller Fulfilled Prime is the strongest FBM play because it confers the Prime badge and the associated experience weighting — but it carries strict performance requirements that are easy to fail.

For most sellers competing on shared ASINs, the single highest-leverage decision is simply moving the SKU into FBA. It converts the fulfillment factor from a liability into an advantage, and it usually unlocks Buy Box eligibility automatically as a bonus. The operations cost (inbound, storage fees, prep) is the trade-off to model against the win-rate gain.

#### Variable 3: Seller Performance Metrics
Seller health is the trust layer of the algorithm, and it acts as both an eligibility gate and a ranking factor. The headline metric is **Order Defect Rate (ODR)**, which combines negative feedback, A-to-z Guarantee claims, and credit-card chargebacks over a rolling ~60-day window. Amazon's hard line is ODR **under 1%** — above it, you risk losing Buy Box eligibility (and account standing) entirely, and nothing else you optimize will help. The practical target is to keep ODR comfortably under 0.5% so you have headroom and a competitive trust score.

The other metrics that feed the Buy Box decision are **Late Shipment Rate** (keep it low — this is mostly an FBM concern), **Pre-Fulfillment Cancellation Rate** (target under ~2.5%), **On-Time Delivery Rate** (aim above ~97%), and **valid tracking rate**. These are most impactful for merchant-fulfilled offers, since FBA shipments inherit Amazon's own fulfillment performance.

These metrics are why two sellers at the same landed price and same fulfillment method can still see different win rates: the one with the cleaner account history gets weighted higher. Account health is slow to build and fast to damage, so the operational discipline — responding to messages quickly, resolving claims, shipping on time, keeping inventory accurate — compounds into a durable Buy Box advantage that competitors can't simply undercut.

Monitor these in the Account Health dashboard and treat any drift toward a threshold as an incident. A single bad week of late shipments or a spike in defects can pull eligibility across your whole catalog, which is far more expensive than the individual orders involved.

#### Variable 4: In-Stock Rate and Inventory Depth
You cannot win the Buy Box on a SKU you can't ship, and Amazon factors both current availability and inventory stability into the decision. The obvious rule is that an out-of-stock offer is not eligible for the Buy Box at all — the moment you hit zero, the featured slot rotates to a competitor.

Less obvious is that **stock depth and consistency** influence rotation share even while you are in stock. Sellers who hold ample inventory and rarely stock out are treated as more reliable and tend to hold the Buy Box a larger share of the time. Frequent stockouts teach the algorithm to lean on more stable competitors, so the cost of a stockout is not just the lost sales during the gap — it is a reduced share of rotation for a period afterward as you rebuild that reliability signal.

This is where Buy Box strategy and restock planning are the same problem. A SKU that wins the Buy Box but runs out every few weeks is leaking far more revenue than its raw out-of-stock days suggest, because each gap hands velocity (and the ranking that comes with it) to competitors. Conversely, disciplined in-stock management is one of the most underrated Buy Box levers — it is entirely within your control and doesn't cost margin the way price cuts do.

For operations-first sellers, the implication is to prioritize Buy Box-winning SKUs in restock planning, build safety stock against lead-time variability on your highest-velocity ASINs, and treat a forecasted stockout on a Buy Box SKU as a high-priority alert rather than a routine reorder.

#### Buy Box Rotation and Sharing
The Buy Box is not a winner-take-all auction that one seller holds permanently. When multiple eligible sellers compete closely on a shared ASIN, Amazon **rotates** the Featured Offer among them, dividing Buy Box time according to how each offer scores. Think of it as a weighted lottery: every eligible seller gets tickets, and sellers with better price, fulfillment, metrics, and stock get more tickets, so they hold the box a larger share of the day.

Your **Buy Box percentage** is the metric that captures this — your share of featured time over a given window. Reasonable targets vary by business model: a private-label seller who owns their ASIN should expect 95%+ (anything lower signals a listing or hijacker problem), competitive wholesale sellers commonly land in the 60–80% range, and arbitrage or unauthorized-reseller situations often sit at 20–50%. The right number depends on how many qualified sellers share the listing.

On busy listings the box can change hands dozens of times a day as the algorithm re-evaluates. This is why a single price check tells you very little — what matters is your share across the day, and whether that share is trending up or down as you adjust price and operations. A sudden drop in Buy Box percentage on a previously stable SKU is one of the clearest early-warning signals that something changed: a new competitor entered, a competitor went FBA, your stock dipped, or a metric slipped.

Because rotation is continuous and weighted, the goal is rarely "win the Buy Box once." It is to maximize your weighted share at the highest price that keeps you competitive — which is precisely the trade-off automated repricing exists to manage.

#### Repricing: Turning the Algorithm Into Share
Repricing is the practice of automatically adjusting your price in response to the competitive landscape so you capture the most Buy Box share at the best possible margin. Because Amazon re-evaluates the Featured Offer continuously and competitors change prices throughout the day, manual repricing is no longer viable for any seller with more than a handful of SKUs — by the time you react, the landscape has moved.

A naive repricer simply matches or undercuts the lowest price, which wins the box but destroys margin and can trigger a race to the bottom where everyone loses. A **Buy Box-aware** repricer is smarter: it models the non-price factors (your fulfillment advantage, your account-health weighting, the competitor's fulfillment method) and finds the *highest* price at which you still win or hold a healthy share of rotation. The difference is the margin you keep by not over-discounting against an FBM competitor you would have beaten anyway.

Good repricing is governed by guardrails. Always set a **floor** (typically your fully-loaded cost plus minimum acceptable margin, including Amazon fees and FBA costs) and a **ceiling**, so automation never sells below profitability or drifts above the suppression threshold. Respecting MAP (Minimum Advertised Price) where it applies is essential for brand-restricted and wholesale catalogs. The floor is non-negotiable: a repricer without a correctly calculated floor will happily win the Buy Box on unprofitable sales.

This is where an operations-first platform earns its keep. Repricing decisions are only as good as the cost data behind them — accurate COGS, current Amazon referral and FBA fees, and real landed-cost figures — so that the floor reflects true profitability and the win at the ceiling is actually worth winning. Repricing in isolation chases share; repricing wired to accurate unit economics chases *profitable* share.

#### When the Buy Box Disappears: Suppression
Sometimes there is no Featured Offer at all. The price and buttons are replaced with a **See All Buying Options** link, and shoppers have to click through and manually choose a seller — a step that kills a large portion of conversions. This is Buy Box **suppression**, and unlike losing the box to a competitor, suppression can affect *every* seller on the listing at once.

The most common trigger is **price**. If the offers on a listing are priced significantly above Amazon's reference point — the recent purchase history, the product's MSRP, or prices for the same item on other retailers and marketplaces — Amazon may decide that featuring any of them would be a poor customer experience and suppress the box entirely. This is why a coordinated price increase across all sellers, or a single seller pricing far above market, can make the Buy Box vanish for the whole listing.

Other triggers include **incomplete or poor listing data** (missing images, titles, or key attributes), **seller performance problems** (poor ratings, high defect or cancellation rates, late shipping), **lack of any Prime/fast-fulfillment offer**, and **policy or condition issues** (for example, an item listed as "new" that Amazon believes is not). Each of these signals to Amazon that no offer clears the experience bar for the featured slot.

Diagnosing suppression starts with price: bring at least one eligible offer down to or below the reference price and the box usually returns. If price isn't the cause, audit the listing content for missing attributes, check your account health, and confirm fulfillment eligibility. Because suppression silently caps conversion on the affected SKU, automated monitoring of Buy Box status — alerting you the moment a featured offer disappears — is one of the highest-value safeguards an operations-focused seller can run.

Source: https://sellervault.io/guides/complete-buy-box-guide

### The Complete Amazon Product Sourcing Guide
Last updated 2026-06-22. A practical, operations-first guide to sourcing products for Amazon FBA: the four sourcing models, product research criteria, profitability math after fees, supplier vetting on Alibaba, gating and ungating, sample evaluation, and how to scale a winning SKU.

Sourcing is the single decision that determines whether an Amazon FBA business compounds or quietly bleeds cash. Pick the right product from the right supplier at the right cost, and almost every downstream problem — pricing, advertising, restocking — becomes solvable. Pick wrong, and no amount of clever marketing rescues a SKU that was never profitable after fees.

This guide walks through how serious sellers actually source: the four sourcing models and their real tradeoffs, the research criteria that separate viable products from traps, the profitability math that accounts for every Amazon fee, how to vet suppliers so you do not wire money to a ghost, and how to scale once you have a winner. It is written to be practical rather than aspirational — the numbers and thresholds here are the ones experienced operators use, not the ones in get-rich-quick courses.

Throughout, the emphasis is operations-first: a product is only as good as the unit economics you can prove *before* you commit capital. Run every candidate through the math before you fall in love with it.

#### The Four Sourcing Models
Every Amazon FBA business is built on one of four sourcing models, and choosing the wrong one for your capital, time, and risk tolerance is the most common early mistake. **Private label** means manufacturing a product under your own brand — usually from an overseas factory — and owning the listing outright. It offers the highest margins (often 30-50%) and a defensible brand asset, but demands the most upfront capital ($3,000-$10,000+ for first inventory plus design and photography) and the longest runway before profit.

**Wholesale** means buying genuine branded products in bulk from authorized distributors or the brand itself, then reselling on existing listings. Margins are thinner (typically 10-25%) because you compete on the buy box, but the model scales cleanly, inventory turns predictably, and you avoid the launch risk of an unproven listing. It requires opening real supplier accounts and, often, getting ungated for brands.

**Online arbitrage (OA) and retail arbitrage (RA)** mean buying discounted or clearance products from online retailers or physical stores and reselling them at Amazon's market price. These are the lowest-capital entry points — you can start with a few hundred dollars — and you get fast feedback because you sell on established listings with existing demand. The tradeoff is that deals are one-off and non-replicable, the model is labor-intensive (constant deal hunting), and you are always at risk of brand gating or IP complaints.

**Dropshipping** on Amazon is the most constrained model and the most misunderstood. Amazon's dropshipping policy requires you to be the seller of record on every package, remove any third-party retailer's branding, and never fulfill from another retailer like Walmart or another marketplace. \'Retail dropshipping\' (buying from Walmart and shipping to the customer) violates policy and gets accounts suspended. Compliant dropshipping is essentially a thin-margin wholesale variant and is rarely a serious long-term FBA strategy. For most sellers, the real choice is between arbitrage (start cheap, learn fast) and private label or wholesale (build something durable).

#### Choosing the Right Model for You
The honest way to pick a model is to be specific about three constraints: how much capital you can lose without pain, how many hours per week you can commit, and whether you want a sellable asset or just cash flow. Arbitrage answers the cash-flow question well — it is the fastest path to your first profitable sale and the cheapest way to learn how Amazon's fees, returns, and account health actually behave. Many eight-figure sellers started with a $500 arbitrage budget precisely because the lessons are cheap.

Private label is the right answer when you want to build equity. A branded SKU with a strong listing, reviews, and a registered trademark is something you can grow, defend with Brand Registry, and eventually sell as part of an aggregator deal. But it punishes impatience: you will spend weeks on product research and supplier negotiation, tie up four to five figures in a single bet, and wait through a launch period before you know if it worked.

Wholesale sits in the middle — more capital and process than arbitrage, less creative risk than private label. If you are good at relationship-building and account management, and you can get ungated for desirable brands, wholesale produces steady, repeatable orders without the launch gamble. The catch is buy-box competition: on a popular ASIN you may share sales with a dozen other sellers, so your edge comes from sourcing cost and inventory discipline, not differentiation.

Many successful operators run a hybrid: arbitrage or wholesale to generate cash and product intuition, then reinvest profits into one or two private-label SKUs once they understand a category. There is no single correct model — only the one that matches your runway and temperament. What does not change across models is the discipline in the next sections: the research and the math.

#### Product Research Criteria
Good product research is a filtering exercise: you start with a large pool of candidates and ruthlessly eliminate anything that fails a hard criterion. The first filter is **demand**, and the best public proxy is Best Sellers Rank (BSR). BSR is updated frequently and reflects recent sales velocity relative to a category — a rank of #1 is the top seller, and higher numbers mean fewer recent sales. As a rough benchmark, a BSR under 10,000 in most categories corresponds to roughly 10-20 sales per day, while highly competitive categories like Electronics may need a BSR under 5,000 for the same velocity.

The critical nuance is that **BSR is only meaningful within its own category**. A BSR of 50,000 in a massive category like Home & Kitchen can mean several sales a day, while the same number in a tiny subcategory might mean zero sales this week. Always interpret BSR against category size, and confirm it with a sales estimate rather than treating the raw number as gospel. Note that Amazon adjusted its BSR algorithm in May 2025 to weight sustained, recent sales more heavily, which makes a steady history more valuable than a single spike.

The second filter is **competition**. Look at how many sellers share a listing, whether the top results are dominated by entrenched brands with thousands of reviews, and whether the niche is saturated. A useful demand-vs-competition heuristic for private label is to seek products where the top listings have strong sales but only moderate review counts (a few hundred, not tens of thousands), signaling room to enter. For arbitrage and wholesale, fewer competing offers on the listing means a larger share of the buy box.

The third filter is **physical characteristics**, which drive both fees and risk. Favor products that are small, lightweight, durable, and not fragile or easily damaged in transit — these minimize FBA fulfillment fees, lower return and damage rates, and keep shipping affordable. Avoid items with electrical components, batteries, or compliance requirements unless you understand the regulatory burden, and steer clear of seasonal-only products for your first SKUs. A practical profitability benchmark that ties research to economics: aim for at least 30 unit sales per month (100+ preferred), monthly revenue near $3,000 or more, and a net margin of 30% or higher after all fees and returns.

#### The Profitability Math (After Fees)
The number that matters is not revenue — it is what lands in your bank account after Amazon takes its cut, and the only way to know that is to model every fee before you buy. There are two core metrics. **ROI (return on investment)** is net profit divided by your total cost (cost of goods plus inbound shipping plus prep), and it answers \'how hard is my cash working?\' **Margin** is net profit divided by the selling price, and it answers \'how much of each sale do I keep?\' Both matter: ROI governs how fast you recycle capital, margin governs how much cushion you have against price drops and returns.

Amazon's two largest fees are the **referral fee** and the **FBA fulfillment fee**. The referral fee is a percentage of the total sale price — 8% to 15% depending on category, with most categories at 15%. Importantly, Amazon froze referral fees for both 2025 and 2026, and rates have been unchanged since January 2024, so this side of the math is stable. The **FBA fulfillment fee** covers pick, pack, and ship and is charged per unit based on size and weight. As of January 15, 2026, Amazon restructured standard-size fulfillment fees into three price bands (under $10, $10-$50, and over $50); the average increase was about $0.08 per unit, but products priced over $50 saw steeper jumps. On top of that, a **3.5% fuel and logistics surcharge** applies to every US FBA fulfillment fee starting April 17, 2026.

Beyond those two, account for monthly storage fees (higher in Q4 and punitive for aged inventory), potential long-term storage and low-inventory-level fees, returns and reimbursements, inbound shipping to Amazon, and your per-unit landed cost of goods. A common beginner error is to compute margin on product cost versus sale price and forget the referral and FBA fees entirely — which can turn an apparent 40% margin into a 5% loss. Always run the full stack: sale price, minus referral fee, minus FBA fee, minus surcharge, minus storage, minus landed COGS, minus a returns allowance.

The thresholds experienced sellers enforce are concrete. For online and retail arbitrage, the widely used minimum is **30% ROI** and at least **$3 net profit per unit** — below that, there is not enough margin to absorb price fluctuations, returns, and the occasional lost unit, and many sellers prefer 40-50% ROI. Private label can tolerate a different shape (lower ROI but higher absolute margin per unit because the brand is yours), while wholesale often runs leaner at 10-25% margin but compensates with volume and predictability. SellerVault's [Amazon product profitability scanner](/amazon-product-scanner) automates this entire calculation — pulling current referral and FBA fees so you see true net profit, ROI, and margin before you commit a dollar.

#### Supplier Vetting and Alibaba
For private label and many wholesale sellers, supplier vetting is where money is won or lost before a single unit ships. Alibaba is the default marketplace for sourcing from overseas manufacturers, and the badges and filters it provides are your first layer of protection — but they are a starting point, not a guarantee. Begin by filtering for **Trade Assurance**, Alibaba's built-in payment protection that helps you recover funds if the supplier ships late or the product fails to meet the agreed specifications. Never place an order outside of Trade Assurance, regardless of how trustworthy a supplier seems.

Next, narrow to **Verified Suppliers** (Alibaba has confirmed the company's identity, business registration, and factory capabilities) and set the supplier type to **Manufacturer** rather than trading company — manufacturers give you better pricing and direct control over customization. Prioritize suppliers with at least **3+ years on the platform** and an **85%+ response rate**, both of which signal an established, responsive operation. A Gold Supplier badge is a useful initial filter but, like all badges, tells you the company exists and pays for membership — not that the product quality is good.

Beyond badges, do the human due diligence. Contact at least three to five suppliers for the same product so you can compare pricing, minimum order quantities (MOQs), lead times, and communication quality. Ask pointed questions about their experience with your exact product, their quality-control process, and what certifications they hold. A supplier who answers quickly, asks clarifying questions, and provides documentation without prompting is worth more than one offering the lowest price. For higher-value orders, a third-party factory audit or inspection is cheap insurance against shipping money to a middleman posing as a factory.

Finally, structure payment to protect yourself. A common arrangement is a deposit (often 30%) with the balance due after a pre-shipment inspection passes, all routed through Trade Assurance. Avoid wiring 100% upfront, avoid suppliers who insist on payment outside the platform, and treat any pressure to move off Alibaba's protected channels as a major red flag. The goal is simple: you should never be in a position where a supplier has your full payment and you have nothing verifiable in return.

#### Sample Evaluation Before You Commit
Ordering samples is non-negotiable, and skipping it to save a few weeks is the most expensive shortcut in sourcing. No matter how verified a supplier is, the sample stage is where you confirm they can actually produce what you need at the quality you require — before you commit to a production run of hundreds or thousands of units. Order samples from your top two or three shortlisted suppliers at the same time so you can compare them side by side under identical conditions.

Evaluate each sample against the standard your customers will hold you to, not the standard of \'good enough for the price.\' Inspect build quality, materials, finish, weight, and dimensions; test the product the way a buyer will use it; and check that packaging protects the item adequately for FBA's handling and your customer's unboxing experience. Photograph everything and document defects precisely, because this is the record you will use to negotiate fixes and to hold the supplier accountable if production units deviate.

Use the sample round to finalize specifications in writing — exact materials, color, packaging, logo placement, insert cards, and any compliance markings — so the production order has no ambiguity. If a sample is close but flawed, request a revised sample rather than assuming the factory will fix it at scale; \'they\'ll improve it in production\' is a hope, not a plan. The cost of a few samples and an extra week of iteration is trivial against the cost of receiving a thousand defective units that fail Amazon's standards and generate returns.

When a sample passes, lock the agreed specification into your Trade Assurance order and, for the first production run, consider a pre-shipment inspection so the bulk order is verified against the same standard before the balance is paid. Treat the sample as the contract: the units you receive should match it exactly, and any deviation is grounds for remediation under Trade Assurance.

#### Gating, Ungating, and Category Approval
Before you commit to a product, confirm you are actually allowed to sell it. Amazon **gates** products at three levels — by category, by brand, and by individual ASIN — meaning even an open category can contain restricted brands or products. Gated categories require Amazon's approval before you can list, and attempting to sell gated items without it can result in removed listings, suspended accounts, or held funds. Checking gating status is a research step, not an afterthought: a great-looking arbitrage deal is worthless if you cannot get approved to sell it.

To request approval, go to Seller Central, navigate to Inventory and Add a Product, search for the item, and click **Request Approval** if prompted. The most common requirement is **invoices from an authorized source** — Amazon wants proof your products come from legitimate wholesale channels. A crucial point that trips up beginners: an Amazon retail receipt does not work, because Amazon invoices are receipts, not proof of wholesale purchase. You generally need invoices from a verified distributor or the brand itself, typically showing a minimum quantity and recent purchase dates.

There is good news for established sellers. A major 2025 trend is the rise of **automatic ungating** — sellers with strong account health (an Order Defect Rate under 1%, a low pre-fulfillment cancel rate, and a consistent sales history) increasingly get approved within minutes without submitting documents, because Amazon's system already trusts them. This makes account health a strategic asset: protecting your metrics directly expands the catalog you can source from.

The practical takeaway is to build ungating into your sourcing workflow. For wholesale, line up authorized suppliers who can provide compliant invoices before you need them. For arbitrage, check gating on every candidate before buying, and keep your account metrics pristine so auto-approval works in your favor. And never try to source counterfeit or unauthorized branded goods to slip past gating — IP complaints and inauthentic claims are among the fastest ways to lose an account.

#### Scaling a Winning Product
Once a SKU proves profitable, the operational challenge shifts from finding products to not running out of them. The most common way sellers cap their own growth is by stocking out: every day a profitable listing is out of stock, you lose sales, sacrifice organic rank, and hand momentum to competitors. Scaling well means forecasting demand against your supplier's lead time so reorders arrive before you sell through — for overseas private label, that lead time (manufacturing plus freight plus Amazon check-in) can stretch six to twelve weeks, so reorder decisions must be made far in advance.

As volume grows, your sourcing economics should improve. Larger orders unlock better per-unit pricing and lower MOQ pressure, and a proven supplier relationship gives you leverage to negotiate payment terms, faster production, or exclusivity. Reinvest early profits into inventory depth and into a second and third SKU rather than pulling cash out — compounding inventory is how arbitrage sellers reach wholesale scale and how private-label sellers build a catalog. But scale deliberately: doubling an order on a SKU with a thin returns allowance can amplify a small problem into a large one.

Watch the metrics that erode at scale. Storage fees rise with inventory age and spike in Q4, so balance enough depth to avoid stockouts against the cost of overstocking slow movers. Long-term storage fees and low-inventory-level fees punish both extremes. Returns, reimbursements owed by Amazon, and gradual fee changes all compress margin over time, so re-run your profitability math periodically — a SKU that cleared 35% margin at launch can quietly slip under your threshold after a fee restructuring like the January 2026 fulfillment-fee change and the April 2026 fuel surcharge.

This is where an operations-first platform earns its keep. SellerVault was built to turn sourcing into a repeatable system: a [profitability scanner](/amazon-product-scanner) that prices every candidate with current fees, restock planning that times reorders against real lead times, and reimbursement recovery that claws back the fees and lost inventory Amazon owes you. The sellers who scale are not the ones who find the most products — they are the ones who keep the winners in stock and keep the math honest as they grow.

Source: https://sellervault.io/guides/complete-amazon-product-sourcing-guide

### The Complete FBA Shipment Guide
Last updated 2026-06-22. A practical, end-to-end guide to creating Amazon FBA inbound shipments in 2026: shipment plans, the inbound placement service fee and how to minimize it, prep and FNSKU labeling, box content and 2D barcodes, packing limits, partnered vs. non-partnered carriers, and receiving reconciliation.

An FBA inbound shipment looks simple from the outside: pack boxes, slap on labels, hand them to UPS. In practice, every step you take in **Send to Amazon** changes what you pay and how fast your inventory goes live. Pick the wrong split option and you hand Amazon an avoidable per-unit placement fee. Mislabel a unit and it gets quarantined as unfanwarehousable. Skip box content information and your boxes sit in receiving for days.

This guide walks the full lifecycle of an FBA shipment the way an operator actually runs it: building the shipment plan, deciding how Amazon splits your inventory, prepping and labeling units to spec, packing within Amazon's weight and dimension limits, choosing a carrier, and finally reconciling what Amazon received against what you sent so you recover money on every short or damaged unit. The numbers and rules below reflect Amazon's 2024-2026 US fee schedule and packaging policies. Where Amazon publishes ranges, we give the ranges; where the right answer is 'it depends on your catalog,' we tell you what it depends on.

#### How an FBA shipment plan works
Every FBA shipment starts as a **shipment plan** inside Seller Central's *Send to Amazon* workflow. You select the SKUs and quantities you want to send, declare your packing approach (individual units vs. case-packed identical boxes), tell Amazon the dimensions and weight of each box, and Amazon responds with one or more *shipments* — each destined for a specific fulfillment center, each with its own shipment ID.

The key mental model: **you create a plan, Amazon creates the shipments.** A single plan for 600 units of one SKU might come back as one shipment to one FC, or as four shipments to four different FCs, depending on the placement option you pick and Amazon's current network needs. Each resulting shipment gets a unique shipment ID (format `FBA` followed by alphanumerics) that drives box labels, carrier booking, and later reconciliation.

There are two packing templates. **Individual units** (mixed SKUs and quantities per box) is flexible but labor-heavy and forces you to enter exact box contents. **Case-packed products** means every box of a given SKU is identical — same SKU, same quantity, same configuration — which is faster to declare, scans cleanly, and is the format Amazon rewards with the cheapest placement options. If your supplier ships you sealed master cases, case-packed is almost always the right template.

Before you build a plan, confirm the SKU is eligible: it must have a product listing, a valid barcode setting (Amazon barcode/FNSKU vs. manufacturer barcode), and must not be blocked by your **restock limits** or **capacity limits**. SellerVault surfaces these constraints next to each recommended buy so you don't build a plan Amazon will reject at submission.

#### The inbound placement service fee — and how to minimize it
On **March 1, 2024**, Amazon introduced the **FBA inbound placement service fee** for standard-size and large bulky-size products. The fee exists because Amazon, not you, often wants your inventory spread across multiple regional fulfillment centers so it's close to customers. When you refuse to do that spreading work yourself, Amazon does it for you and charges you per unit.

In *Send to Amazon* you choose one of three split options, and the option directly sets the fee:

- **Amazon-optimized splits** — you send to the multiple inbound locations Amazon recommends. This is the cheapest path and can reduce the fee to **$0** when you spread inventory across enough destinations (sending to roughly four or more recommended centers can eliminate it). To qualify for the no-fee version, each item must ship as **at least five identical cartons or pallets**, every carton holding the same quantity and item mix.
- **Partial splits** — fewer destinations than Amazon ideally wants; a reduced per-unit fee.
- **Minimal splits** — you consolidate to the fewest locations (often one), and pay the **highest** fee in exchange for the lowest freight and labor on your end.

The per-unit fee depends on size tier, weight, and how minimal your split is. As of the current schedule, standard-size products run roughly **$0.21-$0.44 per unit**; large bulky items run roughly **$1.50-$2.10 per unit**. Effective **January 15, 2025**, Amazon reduced the large-bulky fee by an average of **$0.58 per unit** for minimal splits.

The right choice is a math problem, not a default. Minimal splits cost more in placement fees but save real money on freight (one destination, fewer LTL stops, simpler labor). For a low-cost, high-volume standard SKU, paying $0.30/unit to ship one consolidated truck can beat the freight and handling of four destinations. For a heavy bulky SKU at $2/unit, the optimized spread usually wins. Two ways to skip the fee entirely: enroll in **Amazon Warehousing & Distribution (AWD)**, where placement is an included service, or qualify under FBA New Selection promotions that waive the fee on initial units of new ASINs. Always compare the placement-fee delta against your freight quote *before* you confirm the plan — the cheapest button on screen is rarely the cheapest landed cost.

#### Prep requirements by product category
Prep is the physical preparation a unit needs to survive Amazon's fulfillment network and reach a customer intact. Amazon publishes prep guidance across roughly a dozen product categories, and getting it wrong gets units relabeled as **unfulfillable** — or gets your account hit with an unplanned-prep service fee.

**Poly-bagging** is the most common requirement. Bags must be at least **1.5 mil** thick, transparent, and sealed. Any bag with an opening of **5 inches or wider** (measured flat) must carry a printed suffocation warning reading exactly: 'WARNING: To avoid danger of suffocation, keep this plastic film away from babies and children.' The barcode must remain scannable through the bag.

**Fragile and liquid** items need protection that passes Amazon's **3-foot drop test** — five consecutive drops (flat base, top, longest side, shortest side, and a corner) with no damage. Bubble wrap should fully enclose the product with at least two layers and no exposed surface. **Sharp** items must be guarded so they can't cut a picker. **Adult** products require opaque (black) bagging.

**Expiration-dated and topical/consumable** products carry the strictest rules: the date must be printed clearly enough for an associate to read, in lot-coded format, and the unit must arrive with at least **105 days of remaining shelf life** from the date it reaches the FC. Sets and bundles must be marked 'sold as set' so Amazon doesn't split them. When in doubt, open the SKU's prep guidance in Seller Central rather than guessing — prep mistakes are quietly expensive and compound across every unit in the shipment.

#### FNSKU and unit labeling
Most FBA units need an **FNSKU** label — the Amazon-specific barcode that ties a physical unit to your seller account and listing. You choose between two barcode modes per SKU: the **Amazon barcode (FNSKU)**, where you cover the manufacturer barcode with an FNSKU and your inventory is stored separately (recommended for most private-label and resale sellers), or the **manufacturer barcode (commingled)**, where Amazon uses the existing UPC/EAN and may fulfill your order from another seller's identical stock. Commingling removes the labeling step but exposes you to other sellers' inventory quality — most operators choose FNSKU labeling.

FNSKU label specs are exact. Print in **black ink on a white label**, sized **1-2 inches tall by 2-3 inches wide**, with white space around the barcode (about 0.25 in on the sides, 0.125 in top and bottom). The label must include a scannable barcode, the FNSKU number, the product title, and the condition ('New' or used). Thermal labels are fine if they scan reliably.

Apply the FNSKU so it covers any existing manufacturer barcode — two scannable barcodes on one unit causes scan ambiguity and misrouting. On poly-bagged items, the FNSKU goes on the outside of the bag and must scan through it. For bundles and multi-packs, label the outer packaging once and mark it so the set isn't broken apart.

Get labeling right at the source. The cheapest place to apply FNSKU labels is at your supplier or 3PL prep partner before the units ever reach your hands — Amazon's own FBA Label Service charges per unit and is rarely worth it at volume. A single mislabeled SKU can strand an entire shipment in receiving while Amazon researches it.

#### Box content information and 2D barcodes
Amazon must know exactly what is inside every box *before* it arrives. **Box content information** — the SKU-by-SKU, quantity-by-box manifest — is mandatory, and it is the single most common reason boxes get stuck in receiving when it's missing or wrong.

You can provide box contents three ways: **manual entry** in *Send to Amazon* (or by uploading the box-content spreadsheet/flat file), an **automated feed** via the SP-API integration, or **2D barcodes** printed on each box that encode the contents. Counterintuitively, Amazon warns that **2D barcodes can slow receiving** — boxes with 2D barcodes require more processing time than boxes whose contents were uploaded ahead of arrival. For most sellers, uploading box contents in the workflow (manually or via API) is faster end-to-end than printing 2D barcodes.

Every box ends up with up to three distinct labels, and they are not interchangeable: the **FBA box ID label** (the shipment/box identifier Amazon generates), the **carrier shipping label** (UPS/FedEx/partnered carrier), and — if you didn't pre-upload contents — the **box content** identifier. Mixing these up, or reusing a box ID across two physical boxes, breaks reconciliation.

Accuracy here pays you back at the end. The box content manifest is the baseline Amazon receives *against*. If you declare 24 units in box 3 and Amazon scans 22, that two-unit gap becomes a reconciliation discrepancy you can claim. If your manifest was sloppy, you have no leg to stand on. Treat box content information as your reimbursement insurance policy, not a formality. SellerVault's shipment wizard builds the box-content manifest as you pack so the declared counts match the physical reality you can later prove.

#### Packing, box limits, and oversize rules
Amazon enforces hard physical limits on inbound boxes, and exceeding them triggers rejections or non-compliance fees. As of the current rules (effective June 20, 2025), a standard shipping box may be up to **36 in (L) x 25 in (W) x 25 in (H)** and must weigh **50 lb or less**.

The weight cap has two exceptions, both tied to single-item boxes. A box may **exceed 50 lb only if it contains a single oversized item** (a unit that genuinely can't be split), and it must then carry the correct lift label on at least five sides. As a practical scale: **33-50 lb** boxes should carry a 'Heavy Package' label as a courtesy/safety practice; **over 50 lb** (single oversized item) requires a **Team Lift** label; **over 100 lb** requires a **Mechanical Lift** label. Likewise, a box may exceed the 36-inch length limit only when it holds a single oversized item that can't be packed smaller (a yoga mat, pole, or tripod).

Pack to protect, not just to fill. Use a sturdy double-walled corrugated box, leave no rattling void (fill with dunnage), and never let units shift. Don't mix loose units and case packs in the same box unless your plan is built for individual-unit packing. Keep heavy items low and balanced. A burst box in transit becomes damaged inventory that Amazon may refuse — and a refused unit is lost revenue plus return freight.

For **pallet (LTL/FTL)** shipments, stack to Amazon's pallet spec: shrink-wrapped, not overhanging the pallet, generally within the 72-inch pallet height limit, with the required pallet labels (Amazon now requires pallet labels formatted as PDF417 barcodes for US FCs). Decide early — **small parcel (SPD)** for individual boxes, **LTL/FTL** for palletized volume — because it changes your carrier choice, labels, and appointment requirements.

#### Partnered carrier vs. non-partnered
Once boxes are packed and weighed, you choose how they travel. The decision is between an **Amazon Partnered Carrier** and a **non-partnered carrier** you book yourself.

**Partnered carrier** means Amazon's negotiated UPS (small parcel) or partnered LTL rates, billed through Seller Central and deducted from your account. The advantages are real: deeply discounted shipping, labels generated inside the workflow, and tracking that ties automatically to your shipment so receiving and reconciliation are tighter. For most small-parcel FBA shipments, partnered UPS is the path of least resistance and lowest cost.

**Non-partnered carrier** means you arrange your own freight (your own UPS/FedEx account, a regional LTL carrier, or a freight forwarder) and enter the tracking/PRO number manually. You'd choose this when you have better-negotiated rates than Amazon's partnered program, when shipping internationally into the US, or for specialized freight. The tradeoff: you own the booking, the labels, the delivery appointment, and any failed-delivery risk. With non-partnered freight, set realistic delivery windows in *Send to Amazon* — understating the window creates receiving bottlenecks and can delay your inventory going live.

Whichever you pick, the **carrier label and the FBA box ID label must both be on every box** and must agree. Book LTL appointments where the destination FC requires them. The partnered-vs-non-partnered choice is mostly about who has the cheaper rate and who you want owning the exception handling — run the actual quote both ways for any shipment large enough to matter.

#### Receiving, reconciliation, and reimbursements
Your job isn't done when the boxes ship — it's done when Amazon's received quantity matches what you sent, or you've been reimbursed for the gap. After delivery, units move through Amazon's receiving process over days (sometimes weeks during peak), and the shipment's **received** count climbs toward your shipped count.

Watch for three failure modes. **Shortages**: Amazon checks in fewer units than your box content manifest declared. **Lost in transit / in receiving**: units scanned by the carrier but never reconciled into your inventory. **Damaged on receipt**: units Amazon deems unfulfillable through no fault of your packing. Each is potentially reimbursable — but only if your manifest was accurate and you file within Amazon's claim window.

Reconciliation is mechanical: compare **declared vs. received** at the SKU and box level, identify the discrepancy, gather the proof (box content manifest, carrier proof of delivery, supplier invoice showing unit cost), and open a reconciliation case. Amazon will often ask you to prove ownership and quantity, which is exactly why the box content information and a clean shipment manifest matter so much. Don't let cases sit — claim windows expire, and an unfiled shortage is simply money you gave Amazon.

This is where operations-first tooling pays for itself. SellerVault watches every shipment's received-vs-declared delta, flags shortages and damage automatically, assembles the evidence pack, and surfaces the reimbursement before the claim window closes — turning reconciliation from a quarterly fire drill into a standing recovery process. Combined with demand-forecasted restock planning that builds the *next* shipment plan from real coverage and lead times, the full loop — buy, ship, reconcile, recover — runs without you babysitting spreadsheets.

Source: https://sellervault.io/guides/complete-fba-shipment-guide

### The Complete Amazon Profitability Guide
Last updated 2026-06-22. A complete, operations-first guide to Amazon FBA profitability: the full net-profit-per-unit formula, every Amazon fee that erodes your margin, the difference between gross margin, net margin, and ROI, the hidden leaks that quietly drain accounts (returns, aged-inventory surcharges, the low-inventory-level fee, PPC overspend, unclaimed FBA reimbursements, and cash tied up in slow stock), and the concrete levers that systematically improve margin.

Most Amazon sellers can tell you their revenue to the dollar and have only a vague idea of their actual profit. That gap is where businesses quietly die. A product that looks like it earns a 40% margin in a spreadsheet can land at 6% — or underwater — once referral fees, FBA fulfillment, storage, returns, advertising, and the cost of the cash frozen in inventory are all counted.

This guide builds profitability from the unit up. We start with the complete net-profit-per-unit formula, walk through every Amazon fee as it stands in 2026, separate the three numbers sellers constantly confuse (gross margin, net margin, and ROI), and then go hunting for the leaks that don't show up on a Seller Central dashboard until they've already cost you thousands. Throughout, the lens is operational: profit is not a number you calculate once a quarter — it is the output of decisions you make every week about pricing, replenishment, ad spend, and what to do with stock that isn't selling.

The goal is that by the end you can answer one question with confidence for every SKU you sell: *after everything, what do I actually keep — and what is the single highest-leverage move to keep more of it?*

#### Why Revenue Lies (and What to Measure Instead)
Revenue is the most-quoted and least-useful number in an Amazon business. A seller doing \$1M in sales who keeps 4% is in more danger than one doing \$300K who keeps 18% — the first is one fee increase or one bad quarter from negative, while the second compounds. Yet most sellers steer by top-line because Amazon's reports make it easy to see sales and hard to see what landed in the bank.

The deeper problem is that Amazon's costs are distributed across a dozen places: referral and FBA fees come out per order, storage hits monthly, aged-inventory surcharges hit on a separate schedule, advertising is its own ledger, returns reverse fees days or weeks after the sale, and reimbursements Amazon owes you simply never arrive unless you ask. No single screen reconciles them. By the time a payout statement nets it all out, the data is too aggregated to tell you *which SKU* lost money.

The fix is to measure profitability at the unit level and roll it up — never the other way around. Net profit per unit, multiplied by units sold, then adjusted for business-level costs (PPC, storage, overhead) that don't cleanly attach to one order, is the only model that survives contact with reality. When you know each SKU's true contribution, the business-level questions answer themselves: which products to scale, which to liquidate, which to reprice, and which to stop reordering.

This is why an operations-first approach beats a once-a-quarter accounting pass. Accounting tells you what happened. Per-unit economics, refreshed continuously against live fees and live ad spend, tell you what to *do* — before the slow SKU becomes a long-term-storage liability and before the PPC campaign quietly eats the margin you thought you had.

#### The Complete Net-Profit-Per-Unit Formula
Here is the formula in full. For one unit sold via FBA:

**Net profit = Sale price − Referral fee − FBA fulfillment fee − COGS − Inbound/freight − Storage allocation − Returns allowance − Advertising allocation − Misc fees**

Every term matters, and skipping any one of them is how sellers fool themselves. Walking through them:

- **Sale price** is what the customer pays you, *before* Amazon takes anything — not your payout.
- **Referral fee** is Amazon's commission, 8–15% of sale price depending on category (most categories 15%), with a \$0.30 per-item minimum in the US.
- **FBA fulfillment fee** is the pick-pack-ship charge. As of 2026 it is banded by price (under \$10, \$10–\$50, over \$50) on top of size and weight, and a 3.5% fuel-and-logistics surcharge layers on top of it from April 17, 2026.
- **COGS** is the landed unit cost from your supplier — the single biggest lever you control.
- **Inbound/freight** is the per-unit cost of getting goods to Amazon, including any inbound placement service fee (roughly \$0.30–\$0.72+ per unit unless avoided).
- **Storage allocation** spreads monthly storage cost across the units you expect to sell that month.
- **Returns allowance** is the expected per-unit cost of returns (refunded fees, returns processing fees, unsellable units) amortized across all sales of that SKU.
- **Advertising allocation** is your PPC spend divided across units — best expressed via TACoS at the business level, but it must hit the per-unit model somehow.

Miss the last three — storage, returns, advertising — and your "profit" is a fiction. They are precisely the costs that don't appear on an order-level report, which is exactly why they're the ones that sink margins. A disciplined model carries a line for each, even when the number is an estimate, because a reasoned estimate beats a silent zero every time.

#### Every Amazon Fee That Touches Your Margin (2026)
Amazon's fee stack is the cost of doing business on the world's largest marketplace, and in 2026 it grew again. Knowing each fee — and which ones you can influence — is the difference between pricing for profit and pricing on hope.

**Referral fee.** A percentage of the total sale price (item + shipping you charge), 8–15% by category. Electronics and computers sit at 8%, automotive and industrial at 12%, and the broad middle — Home & Kitchen, Toys, Sports, Office — at 15%. These rates were held flat for 2026, but the \$0.30 minimum per item still erases the math on very low-priced products. Media items also carry a flat \$1.80 closing fee per unit.

**FBA fulfillment fee.** The largest variable fee for most sellers. In 2026, Amazon restructured standard-size fulfillment into three price bands — under \$10, \$10–\$50, and over \$50 — layered on size tier and weight, with an average increase of about \$0.08 per unit effective January 15, 2026 (small standard items over \$50 rose as much as \$0.51). A 3.5% fuel-and-logistics surcharge applies on top of every US fulfillment fee from April 17, 2026. The Low-Price FBA program partly offsets this for sub-\$10 items, averaging about \$0.86 per unit in discount.

**Monthly storage fee.** Charged per cubic foot of space your inventory occupies: \$0.78 per cubic foot January–September, spiking to \$2.40 per cubic foot in Q4 (October–December) for standard-size items. Oversized rates are higher. This is why Q4 overstock is so dangerous — the same pallet costs roughly three times as much to hold in November.

**Inbound placement service fee.** A per-unit charge (≈\$0.30–\$0.72+) for distributing your inventory across Amazon's network, avoidable by sending Amazon-optimized splits (at least five identical cartons/pallets per item) or routing through the Partnered Carrier Program or AWD.

The pattern across all of these: the fees you can't change (referral) you must price around; the fees you *can* change (FBA via dimensions and weight, placement via shipment strategy, storage via inventory velocity) are where operational discipline directly buys back margin.

#### Gross Margin vs. Net Margin vs. ROI — Stop Confusing Them
Three numbers, three completely different decisions. Sellers who blur them make systematically bad calls.

**Gross margin** = (Sale price − COGS) ÷ Sale price. It answers "how much room is there between what I pay for the product and what I sell it for?" It ignores all Amazon fees, so it is wildly optimistic as a profitability measure. A 60% gross margin can become a 10% net margin after fees. Gross margin is useful for comparing products at the sourcing stage, not for judging whether a sale made money.

**Net margin** = Net profit ÷ Sale price, using the full formula from earlier. This is your real profitability per dollar of revenue and the number that determines whether the business is healthy. A sustainable FBA business generally wants net margins in the high teens to low twenties after everything; single-digit net margins leave no cushion for a fee increase, a price war, or a bad return month.

**ROI** = Net profit ÷ Cash invested (primarily COGS + inbound). This answers a different question: "how hard is my cash working?" A product with a modest 15% net margin but a 60% ROI — because the unit cost is low and it turns quickly — can be a far better use of capital than a 30%-margin product whose cash sits in inventory for six months. ROI is the metric that connects profitability to cash flow, and it's the one private-label and arbitrage sellers should optimize hardest because their constraint is usually cash, not demand.

The practical rule: use **gross margin to screen** products before you buy, **net margin to confirm** a SKU is actually profitable once live, and **ROI to allocate capital** between SKUs. A product can win on one and lose on another — a high-margin slow-mover destroys ROI, and a high-ROI thin-margin product can be wiped out by a single fee hike. You need all three in view, never just one.

#### The Hidden Profit Leaks That Drain Accounts
The fees above are visible. The leaks below are not — they hide in separate reports, hit on delayed schedules, or require you to *ask* for money back. Together they routinely cost sellers more than their stated net margin.

**Returns.** A return is a triple cost: you refund the sale, you often forfeit or re-pay fees, and the unit may come back unsellable. In 2026 Amazon also charges a **returns processing fee** when a product's return rate exceeds its category threshold over a trailing window — and apparel and shoes carry a 0% threshold, meaning *every* return is billed. High-return categories (apparel, shoes, jewelry, electronics accessories) can see return rates above 30%, which can quietly turn a profitable-looking SKU into a money-loser. A returns allowance must be baked into per-unit economics, sized to each SKU's real return rate.

**Aged-inventory surcharge.** Slow stock isn't just dead capital — Amazon actively taxes it. On top of monthly storage, units sitting 181–270 days incur roughly \$1.25 per cubic foot per month, 271–365 days about \$1.50, and beyond 365 days a punishing \$6.90 per cubic foot. The surcharge is assessed mid-month against an inventory snapshot, so a removal order placed before the cutoff stops the bleed. This single fee is why aging inventory must be actioned on a clock, not noticed at year-end.

**Low-inventory-level fee.** Run too lean and Amazon penalizes you too. In 2026 the fee applies at the FNSKU level when your historical days-of-supply falls below 35 days, costing roughly \$0.32–\$1.11 per unit shipped. It punishes exactly the stockout-prone replenishment behavior that also costs you sales — a double penalty for poor demand planning.

**PPC overspend.** Advertising is the leak sellers most often mistake for growth. An ACoS that exceeds your margin means each advertised sale loses money; the 2026 account average sits near 32% ACoS, and anything sustained above ~36% usually signals a structural problem, not a bidding tweak. (More on the TACoS framing next.)

**Unclaimed FBA reimbursements.** Amazon loses, damages, and miscounts inventory constantly, and owes you for it — but increasingly only if you file. The typical FBA seller leaves **1–3% of annual revenue** unclaimed, which on a \$1M account is up to \$30K a year evaporating. Worse, the manual claim window dropped from 18 months to **60 days**, and since March 31, 2025 lost/damaged units are reimbursed at *manufacturing cost* rather than sale price — so claims are both smaller and far more time-sensitive than they used to be.

**Cash tied up in inventory.** Capital frozen in slow-moving stock can't buy your next bestseller. This is an opportunity cost that never appears on any Amazon report, yet it caps growth more than any single fee. It's why ROI and inventory turns belong in your profitability view, not just margin.

#### TACoS, ACoS, and Advertising That Actually Builds Profit
Advertising deserves its own section because it is simultaneously the biggest growth lever and the most common cause of invisible losses. The two metrics that matter pull in different directions, and you need both.

**ACoS** (Advertising Cost of Sales) = ad spend ÷ *ad-attributed* sales. It measures campaign efficiency — how much you paid to buy advertised revenue. Your **break-even ACoS** equals your pre-ad profit margin: if you keep 30% of a sale before advertising, an ACoS of 30% means that advertised sale broke even, and anything higher lost money. To *keep* a target net margin, subtract it from break-even — wanting a 15% net on ad sales with a 30% pre-ad margin means a target ACoS around 22.5%.

**TACoS** (Total ACoS) = ad spend ÷ *total* sales (organic included). This is the strategic number. It tells you whether advertising is lifting the whole business or just buying sales you'd have made anyway. The relationship to net margin is direct and unforgiving: if your pre-PPC margin is 35% and TACoS is 12%, you keep 23% net; let TACoS drift to 25% and your net collapses to 10%. A *falling* TACoS while sales hold or grow is the signature of healthy advertising — ads are seeding organic rank, and you're spending less to hold each dollar of revenue.

The operational discipline is to manage campaigns by ACoS and judge strategy by TACoS, and to tie both back to the per-unit margin from earlier. An ad campaign isn't "working" because sales went up; it's working only if net profit after ad spend went up. The fastest profitability win for many accounts isn't a new campaign — it's cutting the spend on terms whose ACoS quietly exceeds the SKU's margin, money that was buying revenue at a loss.

#### Cash Flow and Inventory Velocity — The Profit You Can't See
Profitability and cash flow are not the same thing, and conflating them has killed more Amazon businesses than thin margins. A SKU can be profitable on paper while starving the business of the cash it needs to keep buying. The bridge between the two is inventory velocity — how fast stock turns into sales and back into spendable cash.

Every unit sitting in an FBA warehouse represents capital you've already spent (COGS + inbound) that you can't redeploy until it sells. The longer it sits, the worse the math gets on three fronts at once: storage fees accrue monthly, aged-inventory surcharges kick in at 181 days and escalate brutally past a year, and the opportunity cost compounds because that cash isn't funding a faster-moving product. A 25%-margin SKU that turns six times a year throws off far more annual profit *per dollar of capital* than a 40%-margin SKU that turns once.

This is why **inventory turns** and **days of inventory** belong on your profitability dashboard next to margin. They convert a static margin figure into a velocity-adjusted return on the cash actually at risk. They also expose the trap of overstocking a "winner": buying twelve months of a good product ties up cash, invites aged-surcharges, and risks a Q4 storage spike — often turning a great SKU into a mediocre *use of capital*.

The operational answer is to plan replenishment against real sell-through, keep enough cover to dodge the low-inventory-level fee (35+ days) and stockouts without overshooting into the aged-inventory zone, and treat slow movers as a cash-recovery problem to action on a schedule — markdown, advertise, bundle, or liquidate — rather than a storage problem you notice at year-end. Profit you can't recycle into the next order isn't fully real yet.

#### How to Improve Profitability Systematically
Improving margin is rarely one big move; it's a stack of small, repeatable ones applied across the catalog. Work the levers roughly in order of leverage and effort.

**Attack COGS and freight first** — they're the largest controllable inputs and they improve both margin and ROI simultaneously. Renegotiate supplier pricing at volume, consolidate shipments, qualify for better freight terms, and reduce landed cost per unit. A 10% COGS reduction often moves net margin more than a 10% price increase, because it doesn't risk conversion.

**Reduce FBA and placement fees through dimensions.** Fulfillment fees are driven by size tier and weight; shaving packaging to drop a size tier, reducing dimensional weight, and sending Amazon-optimized inbound splits (or using PCP/AWD) directly cuts per-unit cost with no downside to the customer.

**Price deliberately, not reactively.** Know each SKU's break-even price including the full fee stack, and hold a floor below which a sale loses money. Repricing should defend margin, not just chase the buy box into the ground — a sale at a loss is worse than no sale.

**Plug the leaks on a schedule.** Audit and file FBA reimbursements continuously (the 60-day window is unforgiving), action aging inventory before the 181-day surcharge and again before each Q4, and keep replenishment in the band that avoids both stockouts and the low-inventory-level fee. Each of these recovers margin you've already earned but are losing by inattention.

**Cut losing ad spend and let TACoS guide strategy.** Prune keywords whose ACoS exceeds the SKU margin, and judge the whole program by whether net profit after ad spend rose — not by raw sales.

The meta-lesson is that profitability is an operating cadence, not a calculation. The sellers who keep the most money aren't the ones with the cleverest spreadsheet — they're the ones who refresh true per-unit economics against live fees and live spend every week and act on what the numbers say while the action still matters.

Source: https://sellervault.io/guides/complete-amazon-profitability-guide

### The Complete Amazon FBA Reimbursement Guide (2026)
Last updated 2026-04-11. Every category of FBA reimbursement, exact filing deadlines, evidence requirements, the auto-reimbursement gotchas, and a step-by-step procedure for filing claims through Seller Central in 2026.

If you sell on Amazon FBA, there are reimbursement-eligible discrepancies in your account right now that you have not collected. Between inbound shortages, lost units, damaged inventory, return fraud, and fee overcharges, the typical seller has between 1% and 3% of annual revenue tied up in errors that Amazon will not auto-correct.

For an eight-figure seller, that translates to tens of thousands of dollars sitting on the table every year. The burden of detecting these discrepancies, gathering evidence, and filing claims falls on you — and the deadlines are unforgiving. Miss the window and the money is gone.

This is the definitive 2026 guide to FBA reimbursements: every claim category, the current filing deadlines, the auto-reimbursement coverage gaps that catch sellers off guard, the evidence packets Amazon expects, and a working procedure for filing claims through Seller Central. By the end you will know exactly what to look for, how to document it, and how to file.

#### Why FBA reimbursements matter
Amazon's fulfillment network handles billions of units per year. At that scale, errors are statistical certainties: units get lost, miscounted, damaged, charged the wrong fees, refunded incorrectly, and returned to the wrong sellers. Amazon's automated systems catch some of these and credit you automatically, but the auto-reimbursement coverage is incomplete. The categories where it works well are warehouse-lost and warehouse-damaged inventory. The categories where it leaves money on the table are inbound shortages, customer return discrepancies, fee overcharges, and removal-order shortages.

The reason most sellers under-claim is not laziness — it is that the discrepancies are hidden across multiple Amazon reports, the matching logic between reports is non-obvious, and the eligibility windows are short. A seller manually checking inventory adjustments once a month will miss most claims. A seller running automated audits across the full claim window will catch them.

The financial scale matters. For a seller doing $1M revenue at typical FBA churn rates, recoverable reimbursements run between $10,000 and $30,000 per year. For an eight-figure seller, the same percentages compound to six-figure annual recoveries. This is not "found money" in the casual sense — it is money Amazon already owes you, that they will not give you unless you explicitly file the claim.

#### 1. Inbound shipment shortages
When you ship inventory to an Amazon fulfillment center, the received quantity does not always match what you sent. Units can disappear during the unloading process, get miscounted at receiving, fall behind conveyor belts, or end up in the wrong fulfillment center entirely. Amazon used to reconcile most of these automatically; their auto-reimbursement coverage has tightened in recent years and many shortages now require manual claims.

**How to detect it:** Compare the shipped quantity from your FBA shipment plan against the quantity Amazon reports as received in the Inbound Shipments report. Any difference greater than zero is a potential claim. Be careful to check ALL shipment IDs in a multi-destination split — partial receipts on individual shipment IDs are easy to miss when you focus only on the parent plan.

**Filing window:** 60 days from the shipment delivery date. Amazon shortened this dramatically — older guides still cite the previous 9-month (270-day) window, but under Amazon's current US policy you must file within 60 days. Reconcile every shipment quickly while the evidence chain is fresh and Amazon's receiving records are still available.

**Required evidence:** The original shipment plan with declared quantities, the carrier's proof of delivery showing the box count and weight, and ideally pack-list photos for each box. SellerVault's reimbursement engine cross-references inbound shipment lines against received quantities continuously and surfaces shortages with the evidence packet pre-attached.

#### 2. Inbound shipment damage
Sometimes Amazon receives units but damages them during the intake process. These items get marked as unsellable, may be disposed of, and you may never know they were destroyed. If the damage occurred while inventory was in Amazon's care, you are entitled to reimbursement at the unit's sale price.

**How to detect it:** Monitor the Inventory Adjustments report for reason codes related to warehouse damage on units that were recently received. Cross-reference against any auto-reimbursements applied to confirm Amazon did not already credit you.

**Filing window:** 60 days from the shipment delivery date — the same short window as inbound shortages, so file both as soon as you spot them on a shipment.

#### 3. Warehouse lost inventory
This is the largest single reimbursement category for most sellers. Amazon's fulfillment centers handle massive unit volumes, and units get misplaced, fall behind shelves, get sent to wrong bins, or vanish during inter-FC transfers. Amazon now auto-reimburses most warehouse losses through the Inventory Discrepancy Report (IDR) within 30 days — but "most" is the key qualifier.

**How to detect it:** Cross-reference the Inventory Ledger against the Inventory Adjustments report. Look for units removed from sellable inventory with reason codes like "misplaced", "lost", or "warehouse damage". Then check the IDR to see whether Amazon auto-credited you. The gap between adjustment-out and auto-credit is your manual claim opportunity.

**Filing window:** 60 days from the date the inventory was reported lost — a short window, so check weekly.

**Auto-reimbursement gotchas:** (a) Auto-reimbursement only applies after a 30-day search window, so claims that should be auto-credited may sit pending for a month before resolving. (b) Some reason codes are excluded from auto-reimbursement entirely. (c) If you have a high IPI score and clean account history, auto-reimbursement coverage is broader. Distressed accounts get less.

#### 4. Warehouse damaged inventory
When inventory is damaged while stored or handled inside Amazon's warehouses — picking, packing, customer ship-out, internal transfers, the works — you are entitled to reimbursement. Like warehouse lost, most warehouse damage is auto-reimbursed through the IDR. The gaps are the same: filter the IDR, find the misses, and file manually within 60 days.

**Why this category is bigger than people think:** Warehouse damage often happens at scale on hazmat or fragile categories. A single bad pick session can damage dozens of units of one SKU. Sellers who only spot-check one or two SKUs miss the cluster events.

#### 5. Customer return discrepancies
Customer returns are the most complex reimbursement category because there are multiple distinct ways things can go wrong. The four main failure modes:

**(a) Missing return.** A customer received a refund but never sent the item back. Amazon's US policy (effective 2024-10-23) gives sellers a 60-day wait before they can file a reimbursement case — that window exists so the customer has time to ship the return. If no return is received and Amazon does not auto-reimburse, you can file from day 60 through day 120.

**(b) Wrong item returned.** A customer sends back a different product than what they purchased. You receive damaged or completely unrelated inventory while the customer keeps your product. Detecting this requires comparing return SKUs against original order SKUs.

**(c) Damaged on return.** The customer sends the item back in unsellable condition. Amazon should mark it unsellable AND reimburse you. Sometimes they only mark it unsellable.

**(d) Refund overcharge.** Amazon refunds the customer more than the original sale amount. This is rare but it happens during promotional code edge cases.

**Filing windows (Amazon US, effective 2024-10-23):** Wait at least 60 days after the refund (so the customer's return window has closed and Amazon's auto-reimbursement has had a chance to fire), then file by day 120. For wrong-item returns, file as soon as you can document the discrepancy and within the same 60-120 window.

**Evidence:** The refund amount and date, whether the item was returned, the condition of the returned item, and (if you can get it) photos of the wrong item received.

#### 6. Fee overcharges (weight and dimension errors)
Amazon charges FBA fulfillment fees based on the unit's weight and dimensions on file. If those measurements are wrong — even by a fraction of a pound or inch — you may be paying a higher fee tier on every single sale. For a high-velocity SKU, a small dimensional error can cost thousands of dollars over a year.

**How to detect it:** Pull Amazon's recorded weight and dimensions for each ASIN and compare against your actual measurements. Flag any case where Amazon's value is materially higher. Re-measuring physical units against the FBA Fee Preview report is the gold standard.

**Filing window:** 90 days from the date the fee was charged. Because the overcharge applies to every sale, the cumulative recoverable amount can be substantial.

**Filing process:** Amazon's "request a re-measure" process automatically corrects the dimensions going forward, then back-credits fee differences for the recent past.

#### 7. Removal order discrepancies
When you create a removal order to have inventory sent back to you (or disposed), Amazon sometimes loses or damages units in transit. If the quantity you receive does not match the quantity on the removal order, you have a valid claim.

**Detection:** Compare the removal order quantity against what physically arrived at your return address (or what Amazon confirms as disposed). The reconciliation is straightforward but tedious without automation.

**Filing window:** Between 15 and 75 days after the removal shipment was created. The 15-day floor exists because Amazon needs time to actually process the removal.

#### Critical deadlines at a glance
| Category | Deadline |
| --- | --- |
| Inbound shortages | 60 days from delivery |
| Inbound damage | 60 days from delivery |
| Warehouse lost | 60 days from report (auto-credited first) |
| Warehouse damaged | 60 days from report (auto-credited first) |
| Customer return missing | 60-120 days from refund (US) |
| Customer return wrong item | 60-120 days from refund (US) |
| Refund overcharges | 120 days from refund |
| Fee overcharges | 90 days from charge |
| Removal lost | 15-75 days from removal creation |
| Removal damaged | 60 days from delivery to seller |

Build a recurring weekly audit cadence that touches every category. Most windows now close within 60-90 days (inbound shortages and damage, warehouse lost/damaged, removals, fee overcharges), so they need frequent attention; only the customer-return and refund categories stretch to 120 days.

#### How to file a reimbursement claim
Filing is done through Seller Central. The exact path varies by claim type but the procedure is consistent: open a case, select the correct category, attach evidence, write a clear claim narrative, and follow up if Amazon's first response is generic.

Amazon explicitly forbids API automation for reimbursement filing — claims must be opened manually through Seller Central, even if the detection workflow is fully automated. SellerVault's reimbursement engine respects this by surfacing claims in a queue with copy-ready evidence packets, but the human still clicks "submit" inside Seller Central. Tools that promise "automated filing" through APIs are a TOS risk and may get your account flagged.

The narrative matters. Generic ("I am missing inventory, please reimburse") gets a generic deny. Specific ("Shipment FBA12345 declared 240 units; received report shows 230. Carrier proof of delivery attached, weight reconciles. Please reimburse 10 units of B07XYZ123") gets approved. Always cite specific shipment IDs, dates, and quantities.

#### Building a sustainable reimbursement cadence
The mistake most sellers make is treating reimbursements as a quarterly project. They batch the audit, file 30 claims, get exhausted, and put it off for another quarter. By then half the claims have hit their deadline.

The right cadence is weekly, not quarterly. Most categories now close within 60-90 days — inbound shortages and damage, warehouse lost/damaged, removals, and fee overcharges — so they cannot safely wait. Spend 30-60 minutes once a week reviewing new discrepancies, and file the claims that are clearly eligible. Only the customer-return and refund categories (up to 120 days) have enough slack to batch monthly.

For sellers above ~$1M revenue, the time investment to do this well exceeds what makes sense in-house. The two options are: hire a flat-commission service like GETIDA (typically 25%), or use a bundled reimbursement engine like SellerVault that runs continuously and presents pre-built claims for human review (10-25% commission depending on plan tier). For a seller recovering $30K/year, the difference between 25% and 10% commission is $4,500 — meaningful but not life-changing. The bigger benefit of continuous auditing is that you do not let claims expire.

Source: https://sellervault.io/guides/complete-fba-reimbursement-guide-2026

### The Complete Amazon Repricing Guide
Last updated 2026-04-11. Repricing strategies that win the Buy Box without cratering margin: rule-based vs strategic modes, hard margin floors, anti-oscillation guards, TACoS-aware adjustments, and the safety guardrails every serious repricer needs.

Amazon repricing is deceptively simple to start and surprisingly easy to do badly. Match the lowest competitor, win the Buy Box, profit. That is the story most repricer marketing pages tell, and it is the wrong story. Match-the-lowest repricers cause "race to the bottom" pricing storms, collapse margins across entire categories, and have been responsible for at least one well-documented incident where competing algorithmic repricers knocked active listings into single-digit-percent margin in a matter of hours.

The repricers that work in 2026 do six things that simple match-the-lowest tools do not: hard margin floors at the database level, Buy Box probability modeling, fulfillment-channel awareness, TACoS-aware pricing decisions, anti-oscillation guards, and full per-SKU audit trails. This guide walks through each one, explains why they matter, and lays out the configuration playbook for setting up a repricer that wins the Buy Box without cratering margin.

#### What Amazon repricing actually is
An Amazon repricer is software that automatically adjusts your product prices in response to competitor moves, Buy Box ownership shifts, and rules you configure. The motivation is simple: at any meaningful catalog size, manual repricing is impossible. Competitors change prices hundreds of times per day on contested ASINs. The Buy Box rotates every few minutes. Any seller still typing prices into Seller Central is leaving money on the table.

Repricers come in three rough generations:

**Generation 1: Match-the-lowest scripts.** These are worse than nothing. They collapse the Buy Box for everyone, race margin to the floor, and are responsible for the well-documented pricing storm incidents that periodically wreck contested categories. Avoid.

**Generation 2: Rule-based with hard margin floors.** Acceptable for stable catalogs. You set a min and max price per SKU and the repricer plays inside the box. Better than nothing, but lacks the strategic awareness that wins the Buy Box at HIGHER prices than competitors.

**Generation 3: Strategic, Buy-Box-aware, TACoS-aware repricers with safety guardrails.** This is the only generation worth using on a serious business. The rest of this guide explains what makes a Generation 3 repricer different.

#### Hard margin floors at the database level
The most important feature in any serious repricer is the hard margin floor. The repricer must not be able to submit a price below the floor — not because of a config bug, not because of a malformed cost record, not because of an upstream API hiccup. The constraint should be enforced at the database level so that even a runaway loop can not push a price below the floor.

Floor modes that should be supported:

- **Fixed dollar.** "Never go below $14.99." Simple, useful for legacy SKUs with stable economics.
- **ROI %.** "Never go below the price that produces 30% ROI." Ties floor to landed cost, recalculates automatically when COGS changes.
- **Margin %.** "Never go below the price that produces 25% margin." Ties to revenue not cost.
- **Breakeven.** "Never go below total fees + COGS." Useful for clearance modes where you want the repricer to drop hard but not produce a loss.
- **% above COGS.** "Never go below COGS + 15%." Hybrid between ROI and breakeven.

The breakeven mode is where the integration gets subtle. Which fees count? Referral fee yes, FBA fulfillment fee yes, but what about variable storage? PPC allocation? Inbound costs? The right repricer lets you toggle each fee component on or off so the floor reflects YOUR true breakeven, not an industry average.

#### Buy Box probability modeling
Generation 2 repricers reprice toward a price target. Generation 3 repricers reprice toward a Buy Box probability target. The distinction matters enormously.

When you reprice toward "match the Buy Box price minus 1 cent", you are assuming you will win the Buy Box if you have the lowest price. That is wrong. Amazon's Buy Box algorithm weights fulfillment channel, seller feedback, in-stock status, shipping speed, and historical performance — price is one factor among several. A Buy Box-aware repricer models your probability of winning the Buy Box at each price point, including those non-price factors, and chooses the price that maximizes expected revenue per Buy Box win.

A practical example: you and a competitor are both FBA on the same ASIN. Competitor has 4.3 stars, you have 4.8. The Buy Box-aware repricer recognizes that you will hold the Buy Box ~60% of the time at price parity, vs ~40% for the competitor. So instead of dropping to undercut, the repricer holds at parity (or slightly above) and lets the algorithm rotate to your favor. This wins more revenue at higher margin than dumb undercutting would.

#### TACoS-aware pricing (the part nobody else does)
Most repricers treat advertising and pricing as separate problems. They are not. A SKU with high TACoS is one where every dollar of revenue is being subsidized by ad spend. Dropping the price on a high-TACoS SKU to win more Buy Box is a double loss: less margin per unit AND continuing high ad spend per dollar of revenue.

A TACoS-aware repricer pulls live advertising data from your Amazon Ads account and factors it into pricing decisions. Specifically: when a SKU is carrying high TACoS, the repricer protects margin harder — it raises the floor, restricts how aggressively it will undercut, and prefers losing some Buy Box share over losing margin. When a SKU has low TACoS and healthy organic, the repricer can be more aggressive on price because the underlying business is stronger.

This is genuinely a feature SellerVault has and most other repricers do not. Bqool, Informed.co, Repricer.com, and Seller Snap are all repricer-only tools without integrated PPC data. The result is that they cannot make TACoS-aware decisions at all.

#### Anti-oscillation guards and circuit breakers
One of the failure modes of naive repricers is oscillation: prices zig-zag in narrow bands as multiple repricers chase each other. A typical oscillation cycle: you drop $0.10 to undercut, a competitor drops $0.10, you drop another $0.10, they drop again. Within an hour the price has fallen $5 with no actual buyer activity driving it. Margin has been silently destroyed across the catalog.

Anti-oscillation guards detect and stop these loops. The standard implementations:

- **Narrow-band detector.** If prices oscillate within a small band (say, 5%) more than N times per hour, lock the SKU at the current price for a cooling-off period.
- **Velocity circuit breaker.** If submission rate spikes above 10x the SKU's baseline, halt submissions and audit the cause before resuming.
- **Floor enforcement.** Hard margin floor (covered above) acts as an absolute brake.
- **Storm detection audit.** When multiple SKUs enter narrow-band oscillation simultaneously, fire an alert so a human can investigate.

These guardrails were added to SellerVault's repricer after surviving a real pricing storm in April 2026. The storm started with a competitor running a buggy algorithmic repricer on inactive listings; within 90 minutes the resulting cascade had moved hundreds of competing SKUs into low-margin territory. Most repricers had no defense against this. The post-incident review produced the four guardrails listed above and they have been in production since.

#### Audit trail with reason codes
Every price change should be logged with a reason code, timestamp, trigger event, and the rule that fired. When something looks wrong — and at scale, something always looks wrong — you should be able to trace the decision path in seconds.

Specific data the audit trail should capture:

- The SKU, the old price, the new price, the change delta
- The triggering event (competitor moved, schedule fired, rule re-evaluation, manual override)
- The rule that produced the decision (named, versioned)
- Buy Box probability before and after
- The repricer's confidence score for the decision
- Amazon's submission response (accepted, rejected, queued)
- TACoS context at the time of the decision

Without this, debugging "why did this SKU get priced at $9.99 yesterday afternoon" turns into a multi-hour archaeology project. With it, you click the SKU, click the timeline, and see the answer in 5 seconds.

#### Configuring your first rules
When setting up a repricer for the first time, the temptation is to enable it on the full catalog and let it figure things out. Resist. The right starting playbook:

**Step 1: Enable on a subset.** Pick 20-50 SKUs that span your catalog's range — fast movers, slow movers, contested ASINs, uncontested, premium and discount. Enable repricing on just this subset for the first 1-2 weeks.

**Step 2: Set conservative floors.** Use ROI % or margin % floors set 5-10 percentage points HIGHER than your eventual target. This gives you safety margin to discover whether the repricer's decisions match your expectations.

**Step 3: Watch the audit trail.** Every day for the first week, scroll through the audit trail and verify the decisions make sense. Look for surprises — anything that pricier or cheaper than you expected, any oscillation, any rejected submissions.

**Step 4: Loosen floors.** Once you trust the repricer's decisions on the subset, lower the floors to your true target floors and expand the SKU set in waves of 100-200 at a time.

**Step 5: Enable strategic modes.** Once base repricing is solid, enable strategic modes (TACoS-aware, schedule-based, velocity-aware) one at a time and verify each one's behavior on a subset before going catalog-wide.

This staged rollout is the same approach you would take to deploying any other automation that touches money. Skipping it produces bad surprises.

#### Metrics to watch after deployment
Once the repricer is running, the four metrics to watch closely:

1. **Buy Box win rate.** Should rise within 2 weeks of deployment. If it does not, the repricer is undercutting unnecessarily or your floors are too high.
2. **Average margin per unit.** Should be stable or rising, NEVER falling. If margin is falling, either floors are too low or competitor pressure has shifted.
3. **Submission rate.** Should be stable. Spikes indicate oscillation or unexpected catalog churn.
4. **Rejection rate.** Should be near zero. High rejections indicate listing or pricing rule misconfiguration.

Set up alerts on all four. SellerVault's repricing dashboard surfaces them by default; if your repricer does not, build your own dashboard to track them — do not run a repricer blind.

Source: https://sellervault.io/guides/complete-amazon-repricing-guide

### The Complete FBA Inventory Management Guide
Last updated 2026-04-11. Demand forecasting, lead times, safety stock, reorder points, capacity limits, IPI score, and the operational cadence for managing FBA inventory at scale. Built by an 8-figure seller.

Inventory management is the operational discipline that determines whether an Amazon business is profitable or just busy. Get it right and your capital recycles fast, your storage fees stay low, and your stockouts are rare. Get it wrong and you bleed cash to long-term storage fees on slow movers, miss revenue on stockouts of fast movers, and watch your IPI score drag down your capacity limits.

This guide walks through the full operational stack: how to measure velocity correctly, how to derive safety stock from demand variance instead of guessing, how to compute reorder points that account for ACTUAL lead times, how to manage capacity limits and restock limits, and how to build the weekly cadence that keeps everything running. By the end you will know what to look at, when to look at it, and what to do when each metric goes sideways.

#### Sales velocity: the foundation everything else depends on
Every inventory decision starts with sales velocity — how many units of a SKU you sell per day, per week, or per month. Velocity is the input to forecasts, reorder points, safety stock, days of cover, and storage cost projections. If velocity is wrong, every downstream number is wrong.

The trap with velocity: which window do you measure? The 30-day average smooths short-term noise but lags trend changes. The 7-day average tracks recent shifts but is volatile. Neither is "right" by itself; the right answer is to track multiple windows side by side and pay attention to the direction of change.

A SKU with 30-day velocity of 8 units/day and 7-day velocity of 14 units/day is accelerating. If you set your reorder point based on the 30-day number, you will be late on the next order by the time the 7-day catches up to the 14-day reality. A SKU with 30-day velocity of 8 units/day and 7-day velocity of 3 units/day is decelerating — possibly seasonal, possibly a quality issue, possibly a competitor undercutting. Either way, your forecasts based on the 30-day number are about to over-order.

Seasonal SKUs compound the problem. A Christmas item has Q4 velocity 10x its baseline. The annual average hides that completely. Good inventory tools weight velocity by recency AND adjust for seasonality. SellerVault's Monte Carlo forecasting layers seasonal indices on top of recency-weighted base velocity to produce per-SKU probability distributions instead of point estimates.

#### Days of cover: the most useful inventory metric
Days of Cover (DOC) is the number of days your current on-hand inventory will last given recent sales velocity. The formula is straightforward: `DOC = on-hand units / average daily sales`.

Why DOC is the most useful single inventory metric: it abstracts away absolute unit counts and converts everything to a single time-based number that is directly comparable across SKUs. A SKU with 1,000 units of cover can wait — it has plenty of runway. A SKU with 12 days of cover and a 14-day lead time is already late on the reorder. DOC turns the question "do I have enough?" into "do I have enough TIME?" — which is the question that actually drives decisions.

The right restock workflow ranks SKUs by DOC ascending and processes the lowest-DOC items first, factoring in lead time and safety stock requirements before generating order quantities. Spreadsheet-based restock workflows usually skip DOC entirely and rank by absolute unit count instead, which produces wrong priorities — you end up restocking SKUs with 200 units of cover before SKUs with 30 days of cover because the 200-unit SKU "looks low" in absolute terms.

#### Lead time: stop using the supplier's number
Lead Time is the total elapsed time from "I place a purchase order" to "the inventory is sellable in Amazon's FBA network." It includes supplier production, freight from supplier to your warehouse or prep center, prep work, inbound shipment to Amazon, Amazon's receive time, and the gap between received and sellable status.

Most operations underestimate lead time by 30-50% because they only count the supplier production component. A real lead time breakdown for a typical wholesale order:

| Phase | Days |
|---|---|
| Supplier production | 7 |
| Freight to your warehouse | 4 |
| Prep work | 2 |
| Inbound shipping to Amazon | 5 |
| Amazon receiving | 3 |
| **Total** | **21** |

If your DOC drops to 21 days you are ALREADY late on the reorder — there is no slack for normal variance, much less for the inevitable supplier delays.

The right approach is to track ACTUAL lead time per supplier per SKU, not the supplier's claimed lead time. The two are usually different. SellerVault's restock engine measures actual lead time from the time gap between PO creation and "received" status across past orders, then surfaces a confidence interval — useful for flagging suppliers whose lead time has been creeping up.

#### Reorder point and safety stock
**Reorder Point (ROP)** is the inventory level at which you should trigger the next supplier order. The formula is `ROP = (average daily sales × lead time in days) + safety stock`. When on-hand falls to ROP, the math says you should place an order today.

Worked example: a SKU sells an average of 8 units per day, has a 21-day lead time, and you want 10 days of safety stock. ROP = (8 × 21) + (8 × 10) = 168 + 80 = 248 units. When on-hand drops to 248 units, place the order.

**Safety stock** is the buffer you hold above expected demand to absorb two kinds of variance: demand variance (some weeks sell more than the average) and lead time variance (some shipments arrive later than expected). Without safety stock, even perfect average forecasts produce stockouts about half the time, because half your weeks are above average.

The simple safety-stock formula is `safety stock = Z × σ × √(lead time in days)` where Z is the desired service level (1.65 for 95% in-stock probability, 2.33 for 99%) and σ is the standard deviation of daily demand. In practice most operators do not bother with the formula and instead pick a "safety days" number by feel — 7 days for stable SKUs, 14-21 for volatile ones. SellerVault's Monte Carlo forecasts produce probabilistic distributions per SKU so you can pick a target service level (95%, 99%) and the engine derives the right safety stock from actual demand variance instead of using a flat buffer across the catalog.

#### Capacity limits and restock limits: two different constraints
These two get conflated constantly. They are different.

**Capacity Limits** cap how much you can STORE in FBA at any given moment, measured in cubic feet per storage type (standard, oversized, apparel, footwear, etc.).

**Restock Limits** cap how much you can SEND to FBA in a given month, measured in units per storage type.

A common gotcha: you have 5,000 cubic feet of remaining capacity but only 200 units of remaining standard restock for the month. You CANNOT use that capacity until next month, no matter how empty your bins are.

Both limits are set by Amazon based on a combination of your IPI score, sales velocity, and Amazon's overall warehouse capacity. They are reset monthly. You can purchase additional capacity through the Capacity Manager auction, which is occasionally cost-effective for Q4 ramp but usually too expensive to bother with.

The defensive playbook:

1. Check both limits every Monday before restock planning.
2. Prioritize fast movers if you are restock-limited.
3. Use AWD to sidestep both limits for SKUs that do not need to be in FBA right now.
4. Improve IPI to raise both limits next month.

SellerVault's restock planner shows remaining capacity AND remaining restock limit side by side, and warns when a recommendation would exceed either. Most spreadsheet workflows ignore both and discover the constraint only when an inbound shipment gets rejected at creation.

#### IPI score: the four levers
IPI (Inventory Performance Index) is the 0-1000 score Amazon uses to evaluate how well you manage FBA inventory. It directly affects your monthly capacity and restock limits. A high IPI gets you generous limits; a low IPI restricts your operations and may trigger storage overage fees.

IPI is derived from four components:

1. **Excess Inventory Percentage** — the share of your SKUs that have more than 90 days of cover. To improve: clear excess via removal orders or aggressive markdowns.
2. **Sell-Through Rate** — units sold over the last 90 days divided by average inventory over the same window. To improve: increase velocity OR reduce inventory levels.
3. **Stranded Inventory Percentage** — share of SKUs that have FBA inventory but cannot be sold (suppressed listings, gated brands, etc.). To improve: clean up stranded inventory weekly via the Stranded Inventory dashboard.
4. **In-Stock Rate** — share of high-demand SKUs that have not stocked out. To improve: better restock cadence on the top 20% of SKUs by velocity.

These four are the only levers that move IPI. Generic "improve inventory health" advice is useless because IPI does not measure generic health. It measures these four ratios.

#### Aged inventory: the silent profit killer
Amazon charges escalating storage fees on inventory that has been in FBA for too long. The Aged Inventory Surcharge kicks in at 181 days, escalates at 271 days, escalates again at 365 days, and the Long-Term Storage Fee adds another layer at the 365-day threshold. For a slow-moving SKU, storage cost can easily exceed the unit's gross profit margin within 12 months — turning every "I will sell it eventually" decision into a slow loss.

The defensive playbook is simple but requires discipline:

1. Pull the FBA Inventory Age Report monthly.
2. Identify any SKUs with units approaching the 180-day window.
3. For each, decide: aggressive markdown to accelerate velocity, OR removal order back to your warehouse, OR removal order disposal.
4. Execute the decision the same week. Do not let it slide.

The trap is putting these decisions off because they feel small individually. They compound. SellerVault surfaces aged-inventory cost projections on the inventory dashboard so you can see the future fee impact of decisions you make today.

#### The weekly inventory operations cadence
Inventory management at scale fails when sellers treat it as a "look at it when something goes wrong" task. By the time something is visibly wrong, it is too late to fix. The right approach is a fixed weekly cadence that touches every metric whether or not anything is on fire.

A working weekly cadence:

**Monday morning (30 minutes):**
- Check capacity limits and restock limits for the month.
- Run the restock planner. Process the lowest-DOC SKUs first.
- File POs for anything below reorder point.
- Check the Stranded Inventory dashboard. Fix anything fixable; remove anything not.

**Wednesday (15 minutes):**
- Mid-week velocity check. Are any SKUs accelerating or decelerating unexpectedly?
- Adjust safety stock targets on any SKUs with major velocity shifts.

**Friday (30 minutes):**
- Weekly reimbursement audit (warehouse lost/damaged categories).
- Review any inbound shipments delivered this week — verify received quantities match shipped.
- Pull aged-inventory report once a month, not weekly. Once a month is enough for the monthly reset cadence.

That is roughly 75 minutes per week for a meaningful FBA operation. The investment pays for itself many times over.

Source: https://sellervault.io/guides/complete-fba-inventory-management-guide

---

## Tool Comparisons — X vs Y (6)

### BQool vs Informed.co
BQool (Rule-based Amazon repricer positioned as an accessible mid-tier option) vs Informed.co (Data-first Amazon repricer with broad multi-marketplace support).

BQool and Informed.co are two of the longer-standing names in Amazon repricing, and many sellers shortlist them against each other. BQool is known as an approachable, rule-based repricer that lets you build detailed repricing rules and is often positioned as a strong mid-tier or entry option. Informed.co (formerly Appeagle) takes a more data-first approach, with machine-learning-assisted strategies and support across a wide range of marketplaces.

The practical differences come down to how you like to control pricing and how your billing scales. BQool's pricing is tiered around listing volume and feature level, while Informed.co has historically scaled its plans with monthly sales revenue — worth modeling against your own numbers before committing. Both aim to win the Buy Box and protect margin; the right one depends on your marketplaces, rule complexity, and how you want to pay.

Both are dedicated repricers, and repricing is one piece of running an Amazon business. Neither handles demand-forecasted restock planning or FBA reimbursement recovery, which is where a full operations platform like SellerVault differs: it includes repricing as one capability rather than as a standalone product.

Verdict: Pick BQool if you want granular, rule-based control at an accessible price point. Pick Informed.co if you want a data-first, ML-assisted approach with broad marketplace coverage — but model its revenue-based billing against your sales first. If you want repricing without paying for and integrating a separate tool, a platform that bundles it is worth considering.
Source: https://sellervault.io/compare/bqool-vs-informed-co

### GETIDA vs Refund Geek
GETIDA (Established managed FBA reimbursement service with auditing at scale) vs Refund Geek (FBA reimbursement-recovery service focused on claim filing).

GETIDA and Refund Geek both exist to recover money Amazon owes FBA sellers for lost, damaged, or mishandled inventory and incorrect fees. They audit your account, identify discrepancies, and file claims on your behalf, typically taking a commission on what they recover. GETIDA is one of the most established names in the category, with audit tooling and managed claim filing at scale; Refund Geek is a smaller recovery-focused service in the same space.

When comparing reimbursement services, the things that actually matter are the commission rate, how much of the claim process is automated versus manual, and how broad the detection coverage is across reimbursement types. A lower headline commission is not always the better deal if detection coverage is narrower or fewer claim categories are pursued, so it is worth comparing what each service actually files for, not just the percentage.

Both are standalone recovery services — useful, but single-purpose. They do not reprice your listings or plan your restocks. A full operations platform like SellerVault includes reimbursement recovery as one built-in capability, so the recovery runs in the same place as the rest of your operations rather than as a separate vendor relationship.

Verdict: Pick GETIDA if you want an established, proven recovery partner with broad detection and managed filing. Consider Refund Geek if you want a lighter, recovery-focused alternative. Compare commission rate against detection breadth, not in isolation. If you would rather not run reimbursement as a separate vendor at all, a platform that includes it can fold recovery into your existing operations.
Source: https://sellervault.io/compare/getida-vs-refund-geek

### Helium 10 vs Jungle Scout
Helium 10 (Keyword-led research suite with the widest tool spread) vs Jungle Scout (Product-research suite known for its sales-estimate accuracy).

Helium 10 and Jungle Scout are the two most popular Amazon research platforms, and the choice between them is the most common tool decision new sellers face. Both started as product-research tools and grew into broad suites covering keyword research, listing optimization, and analytics.

Helium 10 has the larger toolbox — Black Box, Cerebro, Magnet, Xray, and a dozen more modules — and tends to win with power users who want every research angle. Jungle Scout is the more opinionated, streamlined product; many sellers find its interface easier and its sales estimates (via the Jungle Scout database) slightly more accurate for product validation.

Both are research-first tools. Neither is built to run the operational side of an FBA business day to day — inventory, repricing, reimbursements, and profit tracking — which is where a tool like SellerVault fits alongside either one.

Verdict: Pick Helium 10 if you want the deepest research toolbox and will use the breadth; pick Jungle Scout if you value a simpler interface and trust its sales estimates for product validation. For most sellers, either covers research well — the gap both leave is operations.
Source: https://sellervault.io/compare/helium-10-vs-jungle-scout

### Helium 10 vs Keepa
Helium 10 (Broad keyword-led research and listing suite for Amazon sellers) vs Keepa (Price and sales-history tracker built on deep historical data).

Helium 10 and Keepa are often compared, but they sit at different points in the workflow. Helium 10 is a broad research suite covering keyword research, product research, listing optimization, and seller analytics. Keepa is narrower and deeper: it tracks Amazon price history, Buy Box history, and sales-rank movement across millions of products, and it is the data source many other tools quietly rely on.

If you are validating demand and competition before sourcing a product, Helium 10 gives you the wider toolbox. If you want to understand how a product's price, Buy Box, and rank have actually behaved over months or years, Keepa's historical charts are hard to beat. The two are complementary more often than they are direct substitutes.

Both are research and intelligence tools. Neither runs the operational side of an FBA business — automated repricing, inventory and restock planning, or reimbursement recovery — which is the gap a tool like SellerVault fills alongside either one.

Verdict: Pick Helium 10 if you need an all-round research and listing suite to find and launch products. Pick Keepa if you mainly want authoritative price, Buy Box, and sales-rank history to inform buying and pricing decisions — many sellers keep both because they barely overlap.
Source: https://sellervault.io/compare/helium-10-vs-keepa

### Jungle Scout vs Keepa
Jungle Scout (Product-research suite known for its sales-estimate accuracy) vs Keepa (Price and sales-history tracker built on deep historical data).

Jungle Scout and Keepa are both staples for Amazon sellers, but they play different roles. Jungle Scout is a research suite designed to help you find and validate products, with a reputation for usable sales estimates and a guided, beginner-friendly workflow. Keepa is a specialist tool focused on historical data: price history, Buy Box history, and sales-rank trends going back years.

If you are deciding what to sell, Jungle Scout walks you through opportunity scoring and demand validation. If you are scrutinizing how a specific product's price and rank have behaved over time, Keepa's charts give you the raw history. Many sellers use Jungle Scout to shortlist and Keepa to sanity-check the history before committing.

Both are research and intelligence tools that stop at the buying decision. Neither reprices live listings, plans restocks against demand, or recovers FBA reimbursements — the operational work that begins once a product is selling, and where a tool like SellerVault fits alongside either one.

Verdict: Pick Jungle Scout if you want a guided research workflow with trusted sales estimates to find products. Pick Keepa if you want authoritative long-term price, Buy Box, and rank history. They overlap little, so most sellers who use one find a reason to keep the other.
Source: https://sellervault.io/compare/jungle-scout-vs-keepa

### Sellerboard vs Helium 10
Sellerboard (Accurate profit and P&L analytics for Amazon sellers) vs Helium 10 (Broad keyword-led research and listing suite for Amazon sellers).

Sellerboard and Helium 10 are both popular with Amazon sellers, but they answer different questions. Sellerboard is built around accurate profit and loss: it reconciles sales, fees, PPC, returns, and cost of goods into a real net-profit picture, and adds extras like reimbursement scanning and review-request automation. Helium 10 is a research-first suite for keyword research, product research, and listing optimization.

If your priority is knowing your true margins per product and per order, Sellerboard is the stronger fit. If your priority is finding the next product and ranking it, Helium 10's research toolbox is broader. Plenty of sellers use one for analytics and the other for research without much overlap.

Both are largely insight tools — one tells you how profitable you are, the other helps you find what to sell. Neither is built to actively run operations like automated repricing or demand-driven restock planning, which is where a platform like SellerVault complements either choice.

Verdict: Pick Sellerboard if your main need is accurate profit analytics, reimbursement scanning, and KPI tracking on an existing business. Pick Helium 10 if you are still finding products and need deep research tooling. They overlap little, so the right answer is often whichever stage you are in.
Source: https://sellervault.io/compare/sellerboard-vs-helium-10

---

## Best-of Roundups (5)

### Best Amazon Inventory Management Software
Amazon inventory management software answers two questions every FBA seller lives with: what do I reorder, and how much? Get it wrong on the low side and you stock out, lose rank, and hand sales to competitors. Get it wrong on the high side and capital sits frozen in long-term-storage-fee territory. Good software turns sales velocity, lead times, and inbound timing into a defensible restock plan.

Tools in this category cluster around different strengths. Some focus on execution — turning recommendations into purchase orders and FBA shipments. Some focus on forecasting — modeling seasonality and demand curves. Others lead with profitability analytics and treat inventory as one feature among many. The right fit depends on whether you want a planner, a forecaster, or a full operations platform.

Below are the top Amazon inventory management tools, ranked by use case.

- SellerVault — best for Operations-first sellers who want restock planning, profitability, and reimbursements in one platform: SellerVault builds restock recommendations from sales velocity, real supplier and FBA check-in lead times, and demand signals, with overstock and money-losing-SKU guards — inside a platform that also handles repricing, reimbursements, and profit analytics.
- RestockPro — best for FBA sellers focused purely on replenishment and PO execution: RestockPro is built specifically for FBA restock planning, generating reorder recommendations from velocity and lead times and turning them into purchase orders and inbound shipments.
- SoStocked — best for Sellers needing highly customizable demand forecasting: SoStocked is known for customizable forecasting — letting sellers build their own demand models, adjust for seasonality, and manage POs across marketplaces.
- Sellerboard — best for Sellers who lead with profit analytics and want stock alerts alongside: Sellerboard is primarily an FBA profit-analytics tool that also provides inventory tracking and restock alerts, strong on detailed financial reporting.
- Inventory Lab — best for Sellers wanting inventory plus accounting and listing workflows: Inventory Lab combines inventory management with accounting, listing, and sourcing (Scout) features, covering profitability and restock in one place.
Source: https://sellervault.io/best/amazon-inventory-management-software

### Best Amazon Product Research Tools
Product research tools help Amazon sellers find products worth selling and validate them before committing capital — estimating demand, sizing competition, checking price and rank history, and confirming the unit economics actually work. For private-label sellers that means opportunity discovery; for online and retail arbitrage it means fast profitability checks on individual ASINs.

It's worth being honest about the landscape. The pure research leaders are dedicated suites built around demand estimation and keyword data. SellerVault is operations-first — its strength is running the business after you're selling — but it includes a profitability scanner for sellers who want sourcing checks integrated with the inventory and profit data they already manage. If deep market research is your primary need, the dedicated suites lead; if you want a scanner inside your operations stack, SellerVault fits.

Below are the top Amazon product research tools, ranked by use case.

- SellerVault — best for Operations-first sellers who want a profitability scanner integrated with their inventory and profit data: SellerVault is operations-first, not a pure research suite — but its product scanner gives sellers fast profitability checks on ASINs tied directly to the fee, cost, and inventory data they already run the business on, which is ideal for sourcing decisions inside an existing operations stack rather than greenfield market research.
- Helium 10 — best for Comprehensive product and keyword research: Helium 10 is a research leader, with deep product-database, keyword, and demand-estimation tools that make it a go-to for private-label opportunity discovery.
- Jungle Scout — best for Product discovery and demand validation: Jungle Scout is a leading product-research platform known for accurate sales estimates, opportunity scoring, and a strong product database for finding and validating products.
- Keepa — best for Price and sales-rank history analysis: Keepa is the standard for Amazon price and BSR history, giving researchers the historical trends behind demand, seasonality, and competition.
- SellerAmp — best for Online and retail arbitrage sourcing decisions: SellerAmp (SAS) is built for arbitrage sourcing, surfacing profitability, eligibility, and competition data for fast per-ASIN buy decisions.
Source: https://sellervault.io/best/amazon-product-research-tools

### Best Amazon Repricing Software
Repricing software automatically adjusts your Amazon prices to win the Buy Box while protecting your margins. The right repricer depends on your catalog: arbitrage and wholesale sellers competing on identical listings need fast, rules-based or algorithmic repricing, while private-label sellers need margin-aware strategy more than raw speed.

The biggest differences between repricers are strategy depth (simple rules vs. Buy Box probability modeling), margin safety (floor/ceiling enforcement and anti-oscillation guards), and whether repricing is the whole product or part of a broader operations platform.

Below are the top Amazon repricing tools, ranked by the use case each fits best.

- SellerVault — best for Operations-first sellers who want repricing alongside inventory, reimbursements, and profit analytics: SellerVault's repricing engine has 6 strategic modes, Buy Box probability modeling, TACoS-aware adjustments, and anti-oscillation/circuit-breaker guards — built into a platform that also handles inventory, restock, and FBA reimbursements, so pricing decisions use real profit data.
- BQool — best for Sellers wanting a dedicated, established AI repricer: BQool is a long-running dedicated repricing tool with rule-based and AI repricing modes, popular with arbitrage and wholesale sellers competing on shared listings.
- Informed.co — best for Larger catalogs wanting algorithmic, Buy-Box-focused repricing: Informed.co (formerly Appeagle) is an algorithmic repricer focused on Buy Box win rate, used by higher-volume sellers and aggregators.
Source: https://sellervault.io/best/amazon-repricing-software

### Best Amazon Seller Tools
No single tool wins every job an Amazon seller has to do. Product research, inventory and restock planning, repricing, profit analytics, and reimbursement recovery each have specialists that lead their lane. The "best" tool depends entirely on which problem is costing you the most money right now.

That said, the category does split cleanly. Research tools help you find and validate products before you buy. Operations platforms run the business after you're selling — keeping you in stock, priced competitively, profitable, and reimbursed for Amazon's mistakes. Analytics tools tell you the truth about margins, and data tools like price-history trackers feed every decision.

Below are the top Amazon seller tools, ranked by what each does best.

- SellerVault — best for Operations-first sellers who want restock, repricing, reimbursements, and profit analytics in one platform: SellerVault consolidates the post-launch side of running an Amazon business — restock planning with real lead times, multi-strategy repricing, reimbursement recovery, and profit analytics — into a single operations platform instead of a stack of separate subscriptions.
- Helium 10 — best for All-in-one research, keywords, and listing optimization: Helium 10 is the most comprehensive research-and-listing suite, with deep keyword, product research, and listing-optimization tools used widely across the industry.
- Jungle Scout — best for Product research and opportunity validation: Jungle Scout is a leading product-research platform known for sales estimates, opportunity scoring, and supplier research for finding and validating products.
- Sellerboard — best for Accurate FBA profit and PPC analytics: Sellerboard is a well-regarded FBA profit-analytics tool with detailed financial reporting, PPC tracking, and stock alerts.
- Keepa — best for Price and sales-rank history tracking: Keepa is the standard for Amazon price and BSR history, providing the historical data that informs sourcing, repricing, and buying decisions.
Source: https://sellervault.io/best/amazon-seller-tools

### Best FBA Reimbursement Services
Amazon owes most FBA sellers money they never claim — for inventory lost or damaged in the warehouse, units lost on inbound shipments, customer returns Amazon never restocked, and fee overcharges on miscalculated dimensions or weights. Reimbursement services find these discrepancies, file the claims, and manage the back-and-forth with Seller Support so you don't have to.

The market splits into two camps. Dedicated recovery agencies work on contingency — they take a percentage of what they recover, usually with no upfront cost, and handle filing for you. Operations platforms instead bake reimbursement detection into the same system that tracks your inventory and shipments, so a discrepancy gets caught the moment the data that proves it lands.

Below are the top FBA reimbursement options, ranked by use case.

- SellerVault — best for Operations-first sellers who want reimbursement detection wired into their live inventory, shipment, and fee data: SellerVault runs reimbursement detection across lost and damaged inventory, unrestocked returns, inbound shortages, and fee/dimension overcharges — using the same shipment and ledger data it already tracks, with a case queue and evidence packs that keep filing under your control and TOS-compliant.
- GETIDA — best for High-volume brands wanting a hands-off contingency agency with deep filing experience: GETIDA is one of the most established FBA reimbursement agencies, auditing accounts and filing claims on a contingency basis with a long track record of recovered funds.
- Refund Geek — best for Sellers wanting a focused, managed recovery service: Refund Geek is a managed FBA reimbursement service that audits accounts and files claims on your behalf, positioned around hands-off recovery.
- Seller Investigators — best for Sellers who prioritize case transparency and detailed reporting: Seller Investigators emphasizes transparency, with a dashboard and detailed case reporting across a wide range of reimbursement types, working on a contingency model.
- Refully — best for Sellers wanting a lower-commission managed recovery option: Refully is a managed FBA reimbursement service that audits and files claims on a contingency basis, positioned as a competitively priced recovery option.
Source: https://sellervault.io/best/fba-reimbursement-service

---

## Blog (13 articles)

### What is TACoS on Amazon? And Why It Should Drive Your Pricing
TACoS (Total Advertising Cost of Sales) is the metric every serious Amazon seller should track. Here is what it means, how to calculate it, and why it should influence your pricing decisions.
Source: https://sellervault.io/blog/tacos-amazon-advertising-explained

### How to Reprice on Amazon: The Complete 2026 Guide
Everything you need to know about Amazon repricing in 2026. Manual vs automated repricing, Buy Box strategy, margin floors, and how to avoid the race to the bottom.
Source: https://sellervault.io/blog/how-to-reprice-on-amazon-complete-guide

### Creating an Amazon FBA Shipment: The Complete Step-by-Step Guide
Walk through the entire FBA shipment process from selecting products to printing labels. Learn case pack setup, box content info, and how to avoid common receiving delays.
Source: https://sellervault.io/blog/step-by-step-fba-shipment-creation-guide

### Amazon FBA Inventory Forecasting: How to Avoid Stockouts and Overstock
Stockouts kill your BSR and overstock drains your capital. Learn demand forecasting techniques, safety stock formulas, and lead time optimization for FBA sellers.
Source: https://sellervault.io/blog/amazon-fba-inventory-forecasting-avoid-stockouts

### How to Calculate True Amazon FBA Profitability Per Unit
Most sellers miscalculate their profit margins by missing hidden fees. Learn how to calculate real per-unit profitability including every Amazon fee, COGS, and overhead cost.
Source: https://sellervault.io/blog/amazon-fba-profitability-per-unit-guide

### How to Reduce Your Amazon PPC ACoS While Scaling Sales
High ACoS eating your margins? Learn proven strategies to optimize Amazon Sponsored Products campaigns, structure ad groups, and find the sweet spot between spend and profit.
Source: https://sellervault.io/blog/reduce-amazon-ppc-acos-scale-sales

### How to Source Profitable Products for Amazon FBA in 2026
Find products worth selling with batch scanning, profitability analysis, and competitive research. A practical guide to retail arbitrage, wholesale sourcing, and online arbitrage for FBA.
Source: https://sellervault.io/blog/how-to-source-profitable-products-amazon-fba-2026

### Setting Up Amazon Seller Alerts: Catch Stockouts, Hijackers, and Fee Changes Early
Do not wait until damage is done. Learn how to configure alerts for low stock, listing changes, price drops, and fee increases to protect your Amazon business proactively.
Source: https://sellervault.io/blog/amazon-seller-alerts-prevent-stockouts-hijackers

### The Complete Guide to Amazon FBA Reimbursements in 2026
Learn about every type of FBA reimbursement, filing deadlines, and how to streamline the discrepancy detection process.
Source: https://sellervault.io/blog/complete-guide-amazon-fba-reimbursements-2026

### How to Build a Profitable Restock Strategy for Amazon FBA
Stop guessing when to reorder. Learn demand forecasting, safety stock calculations, and ABC-XYZ classification to build a data-driven restock plan.
Source: https://sellervault.io/blog/profitable-restock-strategy-amazon-fba

### Amazon Repricing Strategies: A Data-Driven Approach
Move beyond simple rule-based repricing. Explore algorithmic strategies, strategic pricing concepts, and Buy Box optimization to maximize profit per unit.
Source: https://sellervault.io/blog/amazon-repricing-strategies-data-driven

### 5 Amazon Seller Tools You Can Replace with One Platform
Stop paying for five separate subscriptions. See how a single all-in-one platform covers inventory, repricing, reimbursements, sourcing, and analytics.
Source: https://sellervault.io/blog/amazon-seller-tools-replace-with-one-platform

### Understanding Amazon FBA Fees: The Complete Breakdown
Every FBA fee explained in detail. Learn how referral fees, fulfillment fees, storage fees, and hidden charges affect your true profitability per unit.
Source: https://sellervault.io/blog/understanding-amazon-fba-fees-complete-breakdown