The Complete Guide to Amazon FBA Reimbursements in 2026
Why FBA Reimbursements Matter
If you sell through Fulfillment by Amazon, there are likely reimbursement-eligible discrepancies in your account right now. Between lost inventory, damaged goods, overcharged fees, and customer return discrepancies, the average FBA seller has between 1% and 3% of their annual revenue tied up in errors that are never automatically corrected.
For an eight-figure seller, that translates to tens of thousands of dollars sitting on the table every single year. The problem is that Amazon does not proactively reimburse you for most of these errors. The burden falls on you to detect discrepancies, gather evidence, and file claims through Seller Central before strict deadlines expire.
This guide covers every category of FBA reimbursement available in 2026, the exact deadlines you need to know, and how modern tools like SellerVault can streamline the detection and claim-preparation process so you never miss eligible discrepancies.
Types of FBA Reimbursements
1. Inbound Shipment Shortages
When you ship inventory to an Amazon fulfillment center, the received quantity does not always match what you sent. Units can go missing during the check-in process, get miscounted, or simply vanish between the carrier handoff and the warehouse shelf. Amazon is supposed to reconcile these discrepancies within 30 days of receiving your shipment, but they frequently miss units.
How to detect it: Compare the shipped quantity on your FBA shipment plan against the quantity Amazon reports as received. Any difference greater than zero is a potential claim.
Filing window: You have up to 9 months (270 days) from the shipment delivery date to file an inbound shortage claim.
2. Inbound Shipment Damage
Sometimes Amazon receives your units but damages them during the intake process. These items get marked as unsellable and may be disposed of without your knowledge. If the damage occurred while the inventory was in Amazon's care, you are entitled to reimbursement at the current selling price.
How to detect it: Monitor your Inventory Adjustments report for reason codes related to warehouse damage on recently received shipments.
Filing window: Same as inbound shortages, 9 months from shipment delivery.
3. Warehouse Lost Inventory
This is one of the most common and costly categories. Amazon operates massive fulfillment centers with millions of units moving through them daily. Units get misplaced, fall behind conveyor belts, end up in the wrong bin, or are simply lost in transit between fulfillment centers during inventory rebalancing.
How to detect it: Cross-reference your Inventory Ledger with adjustment reports. Look for units removed from your sellable inventory with reason codes like "misplaced" or "lost" that were never found or reimbursed.
Filing window: 60 days from the date the inventory was reported lost. Note: Amazon now auto-reimburses most warehouse losses within 30 days via the IDR portal — only file manually if auto-reimbursement was not issued.
4. Warehouse Damaged Inventory
When inventory is damaged while stored in or handled by an Amazon warehouse, you deserve reimbursement. This includes damage during picking, packing, shipping to customers, or internal transfers. Amazon should automatically reimburse some of these, but many slip through.
How to detect it: Review your Inventory Adjustments report for damage-related reason codes. Cross-reference against any automatic reimbursements to find gaps.
Filing window: 60 days from the date of damage. Amazon now auto-reimburses most warehouse damage within 30 days — check the IDR portal before filing.
5. Customer Return Discrepancies
Customer returns are one of the most complex reimbursement categories because there are multiple ways things can go wrong:
- Missing returns: A customer receives a refund but never sends the item back. Amazon gives customers 45 days to return an item. If the item is not returned within that window, Amazon should automatically reimburse you. But this does not always happen.
- Wrong item returned: A customer sends back a different product than what they purchased. You receive damaged or incorrect inventory while the customer keeps your product.
- Damaged returns: The customer returns the item in unsellable condition, but Amazon adds it back to your sellable inventory or fails to reimburse you.
How to detect it: Track every refunded order and monitor whether the return was received within 45 days. Check the condition of returned items against what was originally sent.
Filing window: Wait 45 days after the refund for the customer to return the item, then file within 15 additional days if the return was not received.
6. Refund Overcharges
Sometimes Amazon refunds a customer more than the original order amount. This can happen due to system errors, incorrect promotional calculations, or rounding issues. The overcharged amount should be reimbursed to you.
How to detect it: Compare the refund amount on each return against the original order total. Any refund exceeding the original charge (minus any restocking deductions) is a potential overcharge.
Filing window: 90 days from the date of the refund.
7. Fee Overcharges (Weight and Dimension Errors)
Amazon charges FBA fees based on the weight and dimensions of your products. If Amazon has incorrect measurements on file, you could be paying higher fulfillment fees on every single unit sold. For high-velocity products, even a small dimensional error can cost thousands of dollars over time.
How to detect it: Compare Amazon's recorded weight and dimensions for each ASIN against your actual product measurements. Flag any discrepancy where Amazon's measurements are larger than the actual product.
Filing window: 90 days from the date the fee was charged.
8. Removal Order Discrepancies
When you create a removal order to have inventory sent back to you or disposed of, Amazon sometimes loses or damages units during the removal process. If the quantity you receive does not match the quantity on your removal order, you have a valid claim.
How to detect it: Compare the requested removal quantity against the quantity actually received at your return address or confirmed as disposed.
Filing window: 15-75 days from the removal shipment creation date (must wait 15 days minimum before filing).
Critical Deadlines at a Glance
| Category | Deadline |
|---|---|
| Inbound shortages | 90 days (from shipment delivery) |
| Inbound damage | 90 days (from shipment delivery) |
| Warehouse lost | 60 days (auto-reimbursable) |
| Warehouse damaged | 60 days (auto-reimbursable) |
| Customer returns | 45-day wait + 60-120 day window |
| Refund overcharges | 90 days |
| Fee overcharges | 90 days |
| Removal lost | 15-75 days from shipment creation |
| Removal damaged | 60 days |
How to File Reimbursement Claims
Filing claims involves opening cases through Seller Central. For each claim type, you need to provide specific evidence:
- Open a case in Seller Central under the appropriate category
- Provide shipment IDs, order IDs, or ASINs relevant to the discrepancy
- Include supporting data such as shipment tracking, inventory reports, or fee calculations
- Follow up if Amazon closes the case without proper investigation
The process is straightforward but extremely time-consuming when done manually, especially if you have thousands of transactions to audit.
How SellerVault Automates Reimbursement Recovery
SellerVault runs 10 automated detection algorithms that continuously scan your account data for every type of discrepancy described above. The system performs a comprehensive lookback audit to catch claims still within their filing windows, and it monitors ongoing transactions in real time.
When a discrepancy is found, SellerVault generates a pre-written case template with all the evidence and data points you need. You simply copy the template, paste it into Seller Central, and submit. No guesswork, no manual report cross-referencing, and no missed deadlines.
Unlike standalone reimbursement services that charge a flat 25% of recovered funds, SellerVault includes managed reimbursement recovery as part of every plan at just 10-25% commission depending on your tier, saving you thousands on every recovery.
Ready to stop leaving money on the table? Start your free trial and let SellerVault audit your account for missed reimbursements, or compare our plans to see how much you could save.