Free FBA tool
FBA Reimbursement Calculator
Your numbers
Don't know yours? Pull your FBA reimbursements report and divide units discrepant by units shipped. If you have never audited, start around 1%.
Use your all-in landed cost (factory + freight + duty), not your sale price. Amazon reimburses on cost, so a low number on file means a low reimbursement.
Reimbursements owed / year
$4,320.00
About $360.00 a month. A recovery service keeping 25% would take $1,080.00 of it, leaving you $3,240.00.
An estimate from the discrepancy rate you entered. Actual claims require reconciling your inventory and fee reports against Amazon and filing within the claim window.
Keep it yourself
$4,320.00
File the claims, keep 100%
Net via service
$3,240.00
After a 25% cut
Service keeps
$1,080.00
Their commission / year
Per month
$360.00
Estimated owed / month
Inventory Hero
Audit every reimbursement, not just estimate them
This page sizes the opportunity from a rate you guess at. Inventory Hero connects to your Seller Central data and reconciles what you sent, sold, and were refunded, so you can check that Amazon's automatic reimbursements are accurate and catch the fee overcharges and return gaps it does not auto-issue, as a list you can act on.
- Connects to your Amazon data and reconciles it automatically
- Checks Amazon's auto-reimbursements for shortfalls
- Catches fee overcharges and return gaps you would otherwise miss
No credit card required.
How the estimate works
Estimated reimbursements
Annual = units/month x discrepancy rate x value/unit x 12
The discrepancy rate is your estimate of the share of units lost, damaged, or never returned in Amazon's favor. The value per unit is what Amazon reimburses, which since 2024 is based on your cost, not retail. A recovery service's commission comes off the top.
This sizes the total reimbursement value at stake; it is not a claim. Amazon now auto-issues the lost/damaged portion, so your manual opportunity is checking those amounts for shortfalls plus the fee-overcharge and return-gap categories. Actual recovery comes from reconciling your Seller Central reports and filing within Amazon's claim windows.
Worked example
You sell about 3,000 units a month. You estimate a 1.5% discrepancy rate, and Amazon reimburses about $8 per unit (close to your landed cost). A recovery service quotes 25%.
- Per month: 3,000 x 1.5% x $8 = $360
- Per year: $360 x 12 = $4,320 potentially owed
- A 25% service keeps: $1,080, leaving you $3,240
- Filing yourself: you keep the full $4,320, minus your time to reconcile and file
Whether you file yourself or use a service, accurate landed cost matters, because Amazon reimburses on cost: a low cost on file means a low reimbursement.
Key terms
- Discrepancy rate
- The share of your units that go missing, get damaged, or are refunded but never returned, in Amazon's favor. It is the lever this estimate scales on; 1% to 3% is a common rough range, but yours depends on your categories and volume.
- Reimbursement value
- What Amazon pays per reimbursed unit. Since 2024 it is based on your manufacturing or sourcing cost (your landed cost), not your retail price, so keeping accurate cost data on file directly affects what you recover.
- Recovery service
- A third party that finds and files reimbursement claims for you and keeps a commission (commonly ~25%) on what it recovers. The alternative is reconciling reports and filing the claims yourself to keep 100%.
Frequently asked questions
What are FBA reimbursements?
FBA reimbursements are money Amazon owes you when something goes wrong in its fulfillment network in your favor: units lost or damaged in the warehouse, customer returns that are refunded but never put back into your sellable inventory, and fee or measurement overcharges (for example, being billed for the wrong size tier or weight). Since 2024 Amazon auto-reimburses for inventory lost or damaged inside its fulfillment centers, so the work has shifted: audit whether those automatic amounts are accurate and complete, and separately claim the categories Amazon does not auto-issue, which is where the remaining money sits.
How much can I get reimbursed?
It scales with your volume and how often discrepancies happen. As a rough estimate, multiply your monthly units by an estimated discrepancy rate (1% to 3% is a common range) and by your reimbursement value per unit. For 3,000 units a month at a 1.5% rate and an $8 value per unit, that is about $360 a month, or $4,320 a year. As a sanity check, recovered reimbursements commonly land somewhere around 0.5% to 1.5% of annual revenue; if your estimate is wildly outside that, re-check your inputs. This is an estimate to size the opportunity, not a guarantee; the real figure comes from reconciling your reports.
Should I use a reimbursement service or file claims myself?
Recovery services find and file claims for you and keep a commission on what they recover, commonly around 25%. The math is simple: if you are owed $4,320 a year, a 25% service keeps $1,080 and you net $3,240. Filing yourself keeps 100%, but it takes time to reconcile reports and submit cases. Use the calculator to see the dollar value of the service's cut, then decide whether your time is worth more than that.
How does Amazon decide a reimbursement amount?
Since its 2024 policy change, Amazon reimburses lost and damaged inventory based on your manufacturing (sourcing) cost, not your retail price. It uses the cost you provide, or its own estimate if you have not supplied one. That means your reimbursement value per unit is usually close to your landed cost, which is why providing accurate cost data to Amazon matters: a low estimate means a low reimbursement.
How do I actually claim FBA reimbursements?
Pull your Inventory Ledger report, your FBA reimbursements report, and your fee/payments reports in Seller Central and reconcile them against what you sent, sold, and were refunded. First check that Amazon's automatic reimbursements for lost/damaged inventory are accurate and complete, then open cases for the manual categories: fee and measurement overcharges, customer-return gaps, and inbound shipments where Amazon received fewer units than you sent. Amazon tightened its claim windows in 2024: most warehouse lost-and-damaged units are now reimbursed automatically, and the manual claims that remain generally must be filed within roughly 60 to 120 days of the event depending on type, far shorter than the old 18-month cushion. Reconcile and file promptly rather than once a year. A recovery service automates this; doing it yourself means a periodic report review.
Inventory Hero
Stop leaving reimbursements on the table
This calculator estimates what is at stake. Inventory Hero reconciles your real sent, sold, and refunded units against Amazon, checks its automatic reimbursements for shortfalls, and surfaces the fee overcharges and return gaps you still have to claim, with the trail you need to file, so you recover what is yours without handing a service a quarter of it.
14-day free trialNo credit card required.
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