Amazon's fees take 25–40% of a typical FBA seller's revenue, spread across half a dozen fee types that hit at different times in different reports. Understanding them is step one; auditing them is where the money is — because fee errors are common, recurring, and claimable.
The big four
- •Referral fee — Amazon's commission per sale, typically 8–15% by category.
- •FBA fulfillment fee — per-unit pick/pack/ship, set by your product's size tier and weight. This is where mis-measurement costs you on every order.
- •Monthly storage fees — per cubic foot, higher in Q4, plus aged-inventory surcharges for stock sitting over 180/270/365 days.
- •Inbound/placement fees — charges related to sending stock into Amazon's network.
See what Amazon owes you — free
Connect your seller account and get a free reimbursement audit. No credit card, keep 100% of what you recover.
Fee errors: the recurring leak
Your fulfillment fee depends on the weight and dimensions Amazon has on file for your product. Warehouses re-measure items routinely, and a wrong measurement — one inch, a few ounces — can bump your product into a higher size tier. Then you overpay on every single unit until someone notices. Auditing fees means recomputing what each SKU should cost from its true dimensions and comparing against what Amazon charged; discrepancies are claimable.
Use our free FBA calculator to compute your real per-unit fees and margin — then let BeanHawk monitor your actual charged fees against expected, continuously.