Amazon FBA Fee Overcharges: How to Claim

Short answer. An Amazon FBA fee overcharge is a fulfillment fee charged for a larger size or heavier weight than your product really has, or charged more than once for the same order. Amazon's own guide says these errors are typically related to incorrect weight or dimension measurements. Check by comparing the fee charged on each order in your settlement report with the fee your measured, packed unit should pay. Fix the record with a remeasurement, then claim back the fees already charged through Fees Charged in Error, within 90 days of the disputed charge for fees tied to weight or dimensions (Amazon's guide, 17 April 2026).

This guide covers Amazon.com (US): the dates, rates and routes below are US ones.

Is it an overcharge, or did Amazon's rates change?

Rule out a rate change before you look for an error. Three changes raised US fulfillment fees in 2026, and none of them is claimable:

• The holiday peak, 15 October 2026 to 14 January 2027. Amazon's announcement of 7 July 2026 says peak fees average $0.32 per unit more than non-peak rates; the increase for your product depends on its size and weight. If your fee jumped in mid-October, start here.
• The fuel and logistics surcharge, from 17 April 2026: 3.5% of the fulfillment fee. The same holiday announcement says it applies on top of peak fees too.
• Price bands, from 15 January 2026. The fulfillment fee depends on the selling price as well as size and weight: under $10, $10 to $50 and over $50. A price change can move a product into another band, and its fee with it.

The surcharge and the price bands are on Amazon's "2026 US FBA fulfillment fee changes" page in Seller Central (sign-in required), which we read on 13 August 2026. The January date is also in Amazon's public announcement.

Why Amazon charges the wrong FBA fee

Your fulfillment fee follows your product's size tier and shipping weight, and both come from the dimensions and weight Amazon has on file. Amazon staff have described those as including "the entirety of the product packaging" (Seller Forums reply, December 2023).

A product at a tier edge. A unit that sits just inside one size tier only has to measure slightly larger to bill in the next one up. A bulging bag or a rounded-up measurement can be enough.

A remeasurement that reads high. Amazon's fulfillment center team can remeasure your product, and the new measurement replaces the record. Sellers often blame "the Cubiscan", one brand of automated dimensioning machine. Whatever does the measuring, the record it writes is what you are billed on.

Packaging. Loose poly bags, hang tabs, handles and bubble wrap all count toward the measured size. A soft bag measured at its widest point can read larger than the product inside.

Dimensional weight. For the larger US size tiers, Amazon bills the greater of the unit weight and the dimensional weight: length × width × height in inches, divided by 139. Small Standard bills the unit weight. So a light product in a big box can pay for the box.

Extra fee lines. An order can carry more than one fulfillment-fee line. Amazon's guide tells sellers to check for duplicates, because fees "are sometimes charged more than once for the same event."

How to check your FBA fees, step by step

1. Pull the FBA Fee Preview report. It shows the size and fee Amazon currently holds for each product. Amazon's July 2026 announcement calls it the Fee and Economics Preview Report.
2. Measure your packed unit. Measure it as it ships to Amazon: longest side, median side, shortest side, and weight. Photograph each measurement with the tape and the scale readout in the shot. Amazon's guide lists product measurements and photos as evidence.
3. Work out the fee it should pay. Enter your measurements in the free FBA calculator. It applies the 2026 US rate card, the 139 divisor and the price bands, at non-peak rates. During the holiday peak, compare with Amazon's peak rates instead, which Amazon says are in its Revenue Calculator and the Fee and Economics Preview Report.
4. Check what you were actually charged. In your settlement report, the per-unit fulfillment fee is on lines labeled FBAPerUnitFulfillmentFee. Compare them with the fee from step 3, order by order, and look for orders with more than one.
5. Find when the size changed. The Monthly storage fees report records the size Amazon held for each product, month by month. Compare months: the first month at the larger size is where the overcharge starts, and its charges are the closest to expiring.

How to request a remeasurement

Amazon's tool is called Remeasure FBA products and confirm fees. Find it by typing "remeasure" into the Seller Central search bar.

In February 2025, Amazon staff said a product can't be submitted if it has already been remeasured twice in the past 60 days by the fulfillment center team, if there are no available units in the fulfillment center, or if your account has reached its monthly remeasurement request limit, which the tool displays (Seller Forums reply, February 2025). That was Amazon's description at the time; check the tool for the current rules.

Your measurements support the request, but Amazon's own measurement sets the record. That cuts both ways: a remeasurement can raise a fee as well as lower it, so measure carefully before you ask.

How to claim back fees you already paid

A remeasurement fixes the record, so fees from then on follow the corrected size. It does not, by itself, refund what you were already charged: that is a separate request. Amazon's guide routes it through Help > Contact Us > Shipping & FBA > FBA Issue, choosing Fees Charged in Error.

Send:

• The ASIN and FNSKU
• The order IDs and the date of each charge
• The fee charged and the fee you expected, per order
• The shipment IDs, which Amazon's guide asks for
• Your measurements and photos of the packed unit
• A screenshot of the product's FBA Fee Preview row
• The remeasurement case ID, if you have one

Send the complete evidence the first time, and keep the case ID.

How long do you have? 90 days vs 18 months

Source: Amazon's guide to disputing incorrect charges, 17 April 2026.

Each charge has its own 90 days, so a product overcharged since spring is losing its oldest charges first. Start with those.

Why other sites disagree: both numbers are Amazon's, from the same guide, for different fee types. An article that gives 18 months for a dimension error is applying the non-itemized limit to an itemized fee. Amazon's help page on weight and dimension reimbursements is visible only when you're signed in, so check its current wording there.

If Amazon says no

Read the reason first. Then reopen the case with what it says was missing: clearer measurement photos, the FBA Fee Preview row, a cleaner order list. Keep the whole case history together, with each case ID, so a new request can point to the old one. Amazon decides what it pays, and some requests won't succeed.

How to stop it happening again

• Measure each new product packed, before you ship it in, and keep the photos.
• Keep a list of products close to a size-tier edge, and check their FBA Fee Preview row each month.
• Tighten packaging: trim excess poly bag, and avoid inserts and handles that add length.
• Review your fees monthly. Amazon's guide suggests a monthly reminder for exactly this.

Doing this across your whole catalog

One product is a spreadsheet job. A catalog is harder: thousands of FBAPerUnitFulfillmentFee lines, a size history for each product, and a 90-day clock on each charge.

FBA fee reconciliation runs the per-order check and prepares each claim. You still file it in Seller Central yourself, and we take no percentage.