FBA fee reconciliation, sometimes called an FBA fee audit, is checking the FBA fulfillment fee Amazon charged on each order against what your rate card says it should have been for that product's size, and claiming the difference back where the two disagree.
FBA fee reconciliation: Check the FBA fee on each order against what it should have been.
Leviathan Recon reads the fulfillment fee Amazon charged on each order, sets it against your rate card for that product's size, and turns the overcharges it finds into claims with the evidence attached. You file them in Seller Central. We take no percentage.
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What Recon flags, per ASIN
- An FBA fee above your rate card for that product's size
- Extra fulfillment-fee lines on one order
- A fee above that ASIN's usual fee
- A size that went up between two Fee Preview or storage reports
- A size close to a size-tier edge, worth measuring
Why FBA fees go wrong
Why does Amazon put my product in the wrong size tier?
Your FBA fulfillment fee follows the size tier Amazon assigns, and the tier follows the dimensions and weight Amazon has on file for the product. When Amazon has incorrect dimensions on file, larger than the unit you ship, the fee goes up with them, on each unit, until someone notices.
Measured at a tier edge
A product that sits just inside a size tier only has to measure slightly larger to bill in the next one up.
Remeasured upward
Amazon can remeasure a product and change its record. If the new figures are wrong, the higher fee starts from that day.
Dimensional weight
For larger, lighter products the fee can follow the box's volume rather than its weight, so a packaging change can move it.
Extra fee lines
An order can carry more than one fulfillment-fee line, and the extra one is easy to miss in a settlement report.
How it works
How do I know if Amazon overcharged my FBA fees?
- 01
Upload your reports
Your settlement report, the FBA Fee Preview report and the Monthly storage fees report, plus your own product measurements. Then confirm the rate card Recon checks against.
- 02
Each order's fee is checked
Recon sets the FBA fee on each order against your rate card for that product's size, and flags the ones that don't fit, per ASIN.
- 03
Claims come ready
Each finding becomes a claim: Amazon's own record of the product, the orders it covers, your measurement where size is the dispute, and case text to paste into Seller Central.
- 04
Track it to the end
You file the case and enter Amazon's case ID. When Amazon answers, you record what it paid: Reimbursed, Partial or Denied.
The claim
What goes into each claim.
- Amazon's own record of the product, saved as it stood when the claim was made
- The orders the claim covers
- Your own measurement, when size is what's disputed
- A working deadline: 90 days from the order date by default
- Case text, written to paste into Seller Central
From evidence to what Amazon paid
OpenReady to fileFiledReimbursedorPartialorDenied
Open means evidence is still missing. You can dismiss a claim before filing it. Your measurements live on their own page, each with where the number came from, and only the ones you mark as verified go into a claim.
Past fees and future fees
Does a remeasurement refund past fees?
Not by itself. A remeasurement corrects the dimensions Amazon has on file, so it changes the fee from then on. What you were overcharged before that is a separate request: a reimbursement claim for the orders already charged at the wrong size.
Remeasurement
Fixes the record. Changes the fees you pay from now on.
Reimbursement claim
Covers fees you've already paid. Needs the orders and the evidence. This is the part Recon prepares.
Deadlines
How long do I have to claim?
Amazon's own guide to disputing incorrect charges puts FBA fees charged on incorrect weight or dimensions under itemized fee errors, and says requests must be submitted within 90 days of the disputed charge. Each order's fee starts its own 90 days, so an overcharge that has run for months is already expiring at its oldest end. The 18-month limit you may have read about is for non-itemized fee errors, such as removal and prep fees.
Recon gives each claim a working deadline counted from the order date: 90 days by default, adjustable in Settings. A fee can't be charged before its order exists, so by default Recon's date falls on or before Amazon's. Amazon's own records decide what it accepts.
What you need
What you need to start.
FBA fee reconciliation is built for Amazon.com (US). You export the reports from Seller Central and upload them.
- Settlement report
- The FBA fulfillment fee charged on each order.
- FBA Fee Preview report
- Amazon's current size and fee for each product.
- Monthly storage fees report
- Amazon's recorded size for each product, each month, which is how a size change between months shows up.
- Your product measurements
- Dimensions and weight, measured by you, with where each number came from.
- A rate card
- One is built in: the US rate card for books, peak and non-peak. Selling something else? Enter your own rate card in Settings → FBA Fee Rules before you rely on the results.
FBA fee questions.
Close. An FBA fee audit is usually a one-off look back over your fees. Recon runs the same check each time you upload new reports, and tracks each claim from its evidence to what Amazon paid.
Export your settlement report, FBA Fee Preview report and Monthly storage fees report from Seller Central, measure your products, and upload them to Recon with your rate card. Recon flags fees above the rate card for a product's size, extra fee lines on an order, fees above an ASIN's usual fee, and sizes that went up between reports. To estimate one product's fee by hand, use the free FBA calculator.
You can ask Amazon for one, with a reimbursement request in Seller Central backed by the orders and your evidence. Amazon's guide routes these through Help > Contact Us > Shipping & FBA > FBA Issue, choosing Fees Charged in Error. Amazon decides what it pays. Recon prepares the claim and the case text; you file it, then record what came back.
For FBA fees charged on incorrect weight or dimensions, Amazon's guide to disputing incorrect charges, posted on Seller Forums on 17 April 2026, says requests must be submitted within 90 days of the disputed charge. Each order's fee has its own 90 days, so the oldest overcharges expire first. Its 18-month limit is for non-itemized fee errors, such as removal and prep fees. Recon's default deadline is 90 days from the order date, which lands on or before Amazon's, and you can change it in Settings.
Often because Amazon's record of the product changed: a remeasurement, a new size tier or a rate change. Recon flags a size that went up between two Fee Preview or storage reports, and a fee above that ASIN's usual fee, so you can see when it started.
No. Recon prepares each claim with its evidence and case text; you file it in Seller Central yourself. We do not act in your account, and we take no percentage of anything Amazon pays you.
FBA fee reconciliation is built for Amazon.com (US). One rate card is built in: the US rate card for books, peak and non-peak. If you sell in another category, enter your own rate card in Settings → FBA Fee Rules before you rely on the results.
When size is the dispute, yes: a claim about size rests on your measurement. Recon keeps your dimensions and weight per product, with where each number came from, and only measurements you mark as verified go into a claim.
Check what Amazon charged you.
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