Amazon FBA Fees: What They Are and How They Add Up

The fees that actually make up your FBA bill

Amazon FBA fees aren't one line item. They're a stack of separate charges, and each one is triggered by something different — a sale, a shipment, a month of storage, a return, an old box that never sold. Understanding the trigger is more useful than memorizing a rate, because the rate changes and the trigger doesn't.

• Referral fee — a percentage of the item's sale price, set by category. This applies whether you use FBA or fulfill yourself; it's a selling fee, not an FBA-specific one.
• Fulfillment fee — charged when Amazon picks, packs and ships the order. Driven by the product's size tier and weight, including dimensional weight for items that are large but light.
• Storage fee — a monthly charge based on the cubic feet your inventory occupies, typically higher during the October-through-December peak.
• Aged inventory surcharge — added on top of storage once a unit has sat unsold past a set number of days, and it climbs the longer it stays.
• Returns processing fee — charged on orders where Amazon covers the customer's return shipping.
• Removal, disposal and liquidation fees — a per-unit charge when you ask Amazon to pull stock out of a fulfillment center, throw it away, or liquidate it.
• Inbound placement fee — covers Amazon distributing your shipment across multiple fulfillment centers instead of one, which affects delivery speed and downstream fulfillment cost.

Exact percentages and dollar bands shift by category, size tier and time of year, and Amazon updates its fee schedule periodically. For a live number on a specific ASIN, use Amazon's own Revenue Calculator rather than trusting a number printed on a third-party page — including this one.

How the fees actually stack up: a worked example

The categories above are easier to hold onto with a walkthrough. The numbers here are illustrative only — built to show the mechanics, not to state Amazon's current rates. Run your own ASIN through the Revenue Calculator before you plan a margin around any of this.

Take a $25, one-pound item in a standard size tier. A referral fee applies as a percentage of that $25 regardless of fulfillment method. A separate fulfillment fee applies because Amazon is doing the pick-pack-ship. Storage accrues monthly on whatever cubic footage the unit occupies while it sits unsold. If it's still unsold past roughly six months, the aged inventory surcharge starts stacking on top of storage. If the customer returns it and Amazon covered return shipping, a returns processing fee applies. If you eventually decide the unit isn't moving and ask Amazon to pull it, a removal or liquidation fee applies once, per unit.

The mistakes that quietly inflate the bill

Full Circle has managed more than $500M in revenue across 100+ brands, and the fee leaks that show up most often aren't exotic. They're the same handful of boring errors, repeated at scale.

• Dimensional weight misclassification. The carton that actually ships doesn't match the product spec sheet — extra void fill, a different box, a rounding error on a measurement — and the unit gets bumped into a bigger size tier than it should be at the fulfillment fee level. A cookware brand shipping heavy, oddly shaped pans runs into this constantly, because the packaging changes more often than the listing does.
• Letting the removal-vs-liquidation decision default. Once stock crosses the aged-inventory line, someone has to decide: pull it, liquidate it, or eat the rising surcharge. Left alone, the surcharge usually wins by default, and it's the most expensive of the three options.
• Not reconciling reimbursements. Units lost or damaged inside a fulfillment center are eligible for reimbursement, but the claim window closes. Most sellers check this rarely, if ever.
• Treating storage and aged-inventory charges as a fixed cost of doing business rather than a signal that reorder timing needs to move earlier.

None of these are edge cases. They're the default state of an account nobody is watching closely, and we've made versions of every one of them ourselves before building the checks that catch them now.

When a fee looks wrong, what to do

A wrong FBA fee doesn't fix itself, and Amazon doesn't proactively flag it as an error on your behalf — it just charges the tier its system assigned.

• Pull the specific case: fee amount, ASIN, date, and the size/weight tier Amazon applied to it.
• Compare that tier against the carton you actually shipped — measured yourself, not taken from the original product spec sheet.
• File a dispute in Seller Central with the measurement evidence attached. A complaint without measurements gets closed; one with photos and dimensions gets looked at.
• Check FBA reimbursement reports on a set schedule — monthly, not annually — for lost or damaged units still inside the claim window.
• If the same ASIN keeps getting remeasured wrong on every new shipment, that's not a one-off dispute anymore. It's a process problem, and it's worth building a standing check rather than fighting the same case every quarter.