Why FBA Sellers Lose Reimbursement Money They Are Owed
Amazon's FBA program is built on a promise: if the warehouse loses or damages your inventory, Amazon will make you whole. For most low-cost items that promise works reasonably well. But for high-value products, the default reimbursement Amazon issues often reflects Amazon's own cost estimate rather than what you actually paid.
That gap is exactly what the Manage Your Sourcing Cost feature in Seller Central is designed to fix. Sellers submit their actual invoice price as proof of value, get that sourcing cost approved, and then request that Amazon recalculate underpaid reimbursements using the approved figure.
It sounds straightforward. In practice, one critical policy rule trips up sellers every day: re-evaluation requests must be submitted within 60 days of the original reimbursement transaction. Miss that deadline and no amount of approved sourcing cost documentation will recover the difference.
The seller situation behind this article illustrates the pain directly. They had an approved sourcing cost of $754.60 for an FNSKU. Amazon reimbursed them $377.30, roughly half the approved value. When they requested re-evaluation, Amazon denied it because the reimbursement transaction was outside the 60-day eligibility window. The seller had no idea the clock was running. They had done everything right on the approval side and still lost hundreds of dollars.
This pattern repeats constantly. Sellers focus on getting the sourcing cost approved, then assume the approval retroactively protects all past reimbursements. It does not.
"The sourcing cost approval system is genuinely useful, but it operates on two separate timelines that sellers conflate. The approval itself has no expiration in the forward-looking sense, but the re-evaluation window for past reimbursements is strict and unforgiving. High-value sellers need a calendar reminder system the moment any reimbursement hits their account." — Miranda Ashford, Senior FBA Policy Consultant, Clearpath Commerce Advisory
How the Manage Your Sourcing Cost System Actually Works
Before getting into the 60-day rule, it helps to understand the full mechanics of this system, because sellers often misread what their approval actually covers.
When Amazon reimburses an FBA seller for lost or damaged inventory, it calculates the payout based on its own internal estimate of the item's value. For many categories, that estimate tracks market price reasonably well. For specialty goods, custom products, or items sourced at premium wholesale prices, Amazon's estimate can fall dramatically short.
The sourcing cost workflow lets sellers override that estimate with their actual documented cost. The process involves going to the Manage Your Sourcing Cost page in Seller Central, submitting proof-of-value documentation (usually a supplier invoice), and waiting for Amazon to review and approve or decline the submission.
Once approved, the sourcing cost does two things:
- It automatically applies to eligible future lost and damage reimbursement events for that FNSKU issued after the approval date. You do not need to re-submit invoices every time a new event occurs, as long as the sourcing cost on file is still valid.
- It makes you eligible to request re-evaluation of past reimbursements, but only for transactions that fall within the 60-day window.
The second point is where sellers get blindsided. A seller who receives an approval in month three may find that the underpaid reimbursement they received in month one is already outside the 60-day window and permanently ineligible for re-evaluation.
For a broader look at how Amazon constructs reimbursement policies affecting FBA sellers, the FBA reimbursement and account health knowledge base is a useful starting point.
The Three Most Common Reasons Amazon Declines Re-Evaluation
Amazon's Seller Central documentation identifies several decline reasons for sourcing cost requests and re-evaluation claims. Three dominate in practice.
1. Value outside policy guidelines. If your submitted sourcing cost is an outlier compared to similar products or Amazon's internal cost model, Amazon will flag it. This does not mean your cost is wrong, but you will need documentation that is unusually specific and credible to overcome the outlier flag.
2. Documentation does not meet requirements. The invoice or proof-of-value document had a deficiency. Common issues include invoices that do not show per-unit cost clearly, documents in unsupported formats, supplier invoices listing a bundle or case price rather than a unit price, or invoices where the item description does not match the FNSKU precisely.
3. Outside the 60-day eligibility window. This is the trap. The original reimbursement transaction was issued more than 60 days before you submitted the re-evaluation request. There is no appeal path for this decline reason. The 60-day window is a hard cutoff.
Identifying which reason caused the denial is step one. The Manage Your Sourcing Cost page shows the decline reason and timestamp in the Last-updated and Update status columns. Read those columns carefully before deciding on a next step.
Sellers dealing with complex Amazon policy declines often find it useful to review the broader Amazon policy violation response guide to understand how to structure their documentation and arguments effectively.
How to Protect Your Sourcing Cost Reimbursements Going Forward
If you want to stop the 60-day trap from claiming future reimbursements, work this process consistently:
- Navigate to the Manage Your Sourcing Cost page in Seller Central immediately after any new FBA reimbursement event for a high-value FNSKU. Do not wait for a monthly reconciliation pass.
- Compare the reimbursement amount Amazon issued against your approved sourcing cost. If the payout is lower than your approved cost, set a 45-day calendar reminder from the transaction date to complete the re-evaluation request, giving yourself a 15-day buffer before the hard cutoff.
- Gather your proof-of-value documentation before the re-evaluation window closes. Your invoice should show the per-unit cost, the supplier name and contact, the purchase date, and a clear item description that matches the FNSKU. If your invoice shows a case quantity, calculate and annotate the per-unit cost explicitly.
- Submit the re-evaluation request through the self-service Dispute a Reimbursement Claim workflow accessible via the Get Help page in Seller Central. Confirm that the units were reimbursed in sellable condition, as the re-evaluation workflow is limited to pre-order lost or damaged events including shipment to Amazon claims, removal claims, and fulfillment center operations claims.
- After submission, return to the Manage Your Sourcing Cost page within five to seven business days to verify the status. If you see a decline, read the specific reason in the Update status column and determine whether the decline is correctable (documentation issue or value mismatch) or terminal (outside eligibility window).
- If your re-evaluation is declined for a correctable reason, resubmit with documentation that directly addresses the stated deficiency. If your invoice value did not match the submitted amount, correct the mismatch and resubmit.
- Maintain a running spreadsheet of all high-value FNSKU reimbursement events, the transaction date, the reimbursed amount, the approved sourcing cost on file, and the 60-day deadline. Review this spreadsheet weekly during any active FBA selling season.
This level of operational discipline is not optional for high-value FBA sellers. The FBA inventory reconciliation best practices guide covers the broader tracking system you need alongside the sourcing cost process.
Most sellers who miss this window only find out when a denial hits. By then it is too late for that transaction. Weekly reviews are the only reliable fix.
What To Do When You Receive a Denial Notice
If Amazon has already denied your re-evaluation and the reason is an outside-the-eligibility-window decline, recourse for that specific transaction is limited. Several actions can still protect your position going forward, though.
First, confirm that your sourcing cost is correctly marked as approved in the Manage Your Sourcing Cost page. A "Seller Submitted" tag in the sourcing cost column for the FNSKU means Amazon has an accepted sourcing cost value on file. That approval is still valid and will automatically apply to future reimbursement events.
Second, treat the denial as a signal that your monitoring workflow needs to change. If you missed the 60-day window once, you will miss it again without a proactive tracking system.
Third, for any current reimbursements still within the 60-day window, act immediately. Do not let additional transactions age out while you are dealing with the denial.
If you received a formal denial notice and are unsure what it means or what your options are, AppealsPro.ai's Suspension Notice Decoder identifies the exact decline reason and surfaces the specific documentation Amazon needs to accept a re-evaluation. This removes the guesswork of parsing Amazon's often-dense policy language.
For sellers who need to draft a formal response or escalation letter, the Appeal Letter Generator in AppealsPro.ai builds a policy-specific letter that presents your approved sourcing cost, your invoice documentation, and your timeline in a format Amazon's review teams expect. You get a complete draft built around the specific violation category rather than writing from scratch.