What are Amazon FBA fees?

Complete breakdown of every fee type, how each is calculated, and how to track them

Definition

What it is

Amazon FBA fees are the charges Amazon deducts from your revenue in exchange for storing, picking, packing, and shipping your products through the Fulfilment by Amazon programme. They consist of four main categories: fulfilment fees (per-unit), referral fees (percentage of sale price), storage fees (monthly, per cubic foot), and return processing fees (charged when a customer returns an FBA item). Together they typically represent 25–45% of your gross revenue depending on product category and size tier.

Formula

Total FBA Fee per Unit

Formula

Total Fee = Referral Fee + Fulfilment Fee + Storage Fee (monthly allocation) + Return Processing Fee (if applicable)

Referral fees range from 6% (personal computers) to 45% (Amazon Device Accessories). Fulfilment fees are size-tier based — a standard small item under 4oz currently costs around $3.06/unit; an oversized item can exceed $20/unit. Storage fees vary by time of year: Q4 (Oct–Dec) rates are approximately 3× higher than off-peak rates.

Business impact

Why it matters

FBA fees are the single largest variable cost for most Amazon sellers and the most common reason products appear profitable in gross revenue but lose money net. A $25 product with a $3 cost of goods can generate negative margin once referral fee ($3.75), fulfilment fee ($3.50), storage ($0.50), and PPC are subtracted. Understanding the fee breakdown per SKU is essential for pricing decisions, product selection, and margin improvement.

The challenge

How most teams track this today

Amazon itemises FBA fees in the Settlement report and the FBA Fee Preview report, but neither provides a clean per-SKU summary across all fee types in one view. The FBA Fee Preview shows estimated future fees; the Settlement report shows actual historical fees but requires filtering and aggregation to produce meaningful per-SKU totals.

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FAQ

Common questions

What is the difference between a referral fee and a fulfilment fee?

The referral fee is a percentage of the total sale price (including shipping) that Amazon charges for the right to sell on its marketplace. It applies regardless of whether you use FBA or FBM. The fulfilment fee is an additional per-unit charge specific to FBA that covers picking, packing, and shipping your item from an Amazon warehouse to the customer.

Do FBA storage fees apply to all inventory?

Yes. Any inventory stored in an Amazon fulfilment centre incurs monthly storage fees based on the daily average volume (cubic feet) of space your inventory occupies. Items stored from October through December are charged at the higher Q4 rate. Items stored for more than 365 days are also subject to aged inventory surcharges.

How do I find my actual FBA fees in Seller Central?

Go to Reports → Payments → Transaction View and filter by transaction type "FBA Inventory Fee" and "Service Fees". Alternatively, the Settlement Detail report contains itemised fee lines. The FBA Fee Preview report (in Inventory → FBA) shows estimated per-unit fees for your current listings.

Can I see FBA fees per SKU over time in Taptic?

Yes. Taptic imports the FBA financial events table from the SP-API, which contains itemised fee records per ASIN per transaction. The FBA fee impact query groups these by SKU and time period, showing referral fee, fulfilment fee, and storage fee separately alongside net revenue per unit.

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