How does Amazon calculate reimbursement for lost FBA inventory?

Amazon reimburses sellers based on the item's selling price minus applicable fees (referral fees, fulfillment fees, etc.) or the item's cost price, whichever is lower. For items sold within the last 18 months, they use the weighted average selling price. For older items, they may use the cost price you provided when creating the listing.

What inventory reports should I audit to find lost items?

Key reports include the 'Inventory Adjustments' report (shows removals, damages, and losses), 'Received Inventory' report (for discrepancies in inbound shipments), and the 'Monthly Storage Fees' report (to spot items charged storage but not sellable). Cross-reference these with your 'Inventory Health' report to identify missing units.

How long do I have to file a lost inventory claim with Amazon?

You must file claims within 18 months of the inventory being reported as lost or damaged. For FBA customer returns, the window is 60 days from the return date. Claims older than 18 months are typically denied, so regular auditing is critical.

What evidence do I need to submit for a successful lost inventory claim?

Provide proof of shipment (carrier tracking, delivery confirmation), invoice from your supplier, and screenshots of the inventory being received by Amazon. Also include the FNSKU, ASIN, and quantity lost. Clear documentation showing the item was sent and not returned or sold strengthens your case.

Can I get reimbursed for inventory lost during inbound shipments to Amazon?

Yes, if the shipment shows as 'Delivered' in carrier tracking but Amazon never marks it as 'Received' in your inventory. File a 'Shipment Inbound' claim with the tracking number, delivery proof, and packing list. Amazon will investigate and reimburse if the items are confirmed lost.

Amazon FBA Lost Inventory Reimbursement: Complete Seller Guide

Lost stock in Amazon warehouses? Learn how to calculate reimbursement values, audit your inventory reports, and file successful lost inventory claims.

Introduction: The Hidden Profit Drain of Lost FBA Inventory

Amazon FBA is a highly sophisticated fulfillment network, but with hundreds of warehouses and millions of packages moving daily, inventory losses are inevitable. Items are misplaced in high-density bins, lost during cross-dock transfers, or missed during inbound receiving. For high-volume sellers, these losses can represent thousands of dollars in lost cash flow if left unrecovered.

While Amazon's automated system detects and reimburses many lost items, a significant percentage goes unnoticed. To protect your profit margins, you must run regular ledger audits, identify missing units, and file manual reimbursement claims. This guide covers how to identify lost inventory, calculate exact payout values, and submit successful claims.

For streamlined Amazon operations and document preparation, sellers can use our free browser utilities: the Invoice & Label Separator to isolate invoice documents, the Amazon FBA Fee Calculator to audit fulfillment fee deductions, and the Amazon India Label Cropper to standardize shipping labels for thermal printing.

1. Common Lost Inventory Scenarios

FBA inventory usually goes missing during one of three key phases of the fulfillment lifecycle:

Inbound Receiving: Units are scanned at the fulfillment center dock but go missing before being added to active inventory.
Warehouse Transfers: Items are transferred between regional fulfillment centers to position them closer to customers, but go missing during transit.
Customer Returns: A customer receives a refund but the returned item is never scanned back into your inventory or marked as unsellable.

2. Deciphering the Adjustment Report Codes

To find lost stock, you must analyze your Inventory Ledger report. In Seller Central, go to Reports > Fulfillment > Inventory Ledger. Look for these specific transaction codes:

undefined

3. How Amazon Calculates Lost Stock Reimbursements

Amazon does not pay the full retail price for lost items. Instead, they estimate what you would have received if the item had sold, taking fees into account:

Average Selling Price (ASP): The average price the item sold for over the last 90 days, taking into account promotions and discounts.
FBA Fees Deduction: Amazon deducts standard referral and fulfillment fees from the ASP.
Default Value: If the item has no sales history, Amazon uses category average pricing to calculate a default reimbursement value.
Appealing Low Payouts: If the category average value is lower than your actual sourcing costs, you can appeal and submit wholesale invoices to prove value.

4. Sourcing & Shipping Evidence Standards

To get your lost inventory claims approved, compile these documents for manual review:

Supplier Tax Invoice: Commercial invoice showing supplier contact info, matching quantities, and storefront billing details.
Proof of Delivery: Stamped Bill of Lading (BOL) for pallet shipments, or signature confirmation logs for small parcel deliveries.
Inventory Ledger: CSV export showing the missing stock transaction adjustments.

5. Step-by-Step Lost Inventory Recovery Playbook

Establish Monthly Audits: Dedicate the first week of every month to exporting your Inventory Ledger reports and matching discrepancies.
Calculate Net Lost Units: Deduct found units (Code 23) from lost units (Code 16/11) to find the net missing quantity.
Wait for the 30-Day Window: Amazon requires a 30-day wait period to allow their systems to locate misplaced items automatically.
Open Seller Support Case: Go to Seller Central > Help > Get Support > Fulfill by Amazon > Investigate Warehouse Discrepancies.
Submit Case Details: Provide the FNSKU, date of loss, transaction IDs from the ledger, and attach manufacturer invoices.
Escalate Denials: If support rejects your claim, request escalation to the FBA Leadership Team for a manual review.

6. Payout Appeal Templates for Global Sellers

Use this template if Amazon reimburses you at a value below your sourcing costs:

Dear Seller Support Team, I am requesting a pricing review for Case ID [Case ID] regarding reimbursed units for ASIN [ASIN]. The reimbursement value was calculated using a category average of [Value]. However, our actual wholesale sourcing cost for this item is [Value] per unit. We have attached our manufacturer invoices proving the actual unit cost. Please adjust the reimbursement payout to match our sourcing cost. Best regards, [Store Name]

7. FAQ: Lost Inventory Reimbursements

Q: How long do I have to file a claim for lost inventory? You must file within 18 months of the reported loss date in your ledger logs.
Q: What happens if Amazon finds misplaced inventory after paying the reimbursement? Amazon will add the found units back to your active stock and reverse the reimbursement amount from your seller balance.
Q: Can I claim items that were lost during shipment to the warehouse? Yes, but you must file these as inbound shipping shortages within 9 months of delivery.

Audit Your Shipping Labels Now

Frequently Asked Questions

How does Amazon calculate reimbursement for lost FBA inventory?
Amazon reimburses sellers based on the item's selling price minus applicable fees (referral fees, fulfillment fees, etc.) or the item's cost price, whichever is lower. For items sold within the last 18 months, they use the weighted average selling price. For older items, they may use the cost price you provided when creating the listing.
What inventory reports should I audit to find lost items?
Key reports include the 'Inventory Adjustments' report (shows removals, damages, and losses), 'Received Inventory' report (for discrepancies in inbound shipments), and the 'Monthly Storage Fees' report (to spot items charged storage but not sellable). Cross-reference these with your 'Inventory Health' report to identify missing units.
How long do I have to file a lost inventory claim with Amazon?
You must file claims within 18 months of the inventory being reported as lost or damaged. For FBA customer returns, the window is 60 days from the return date. Claims older than 18 months are typically denied, so regular auditing is critical.
What evidence do I need to submit for a successful lost inventory claim?
Provide proof of shipment (carrier tracking, delivery confirmation), invoice from your supplier, and screenshots of the inventory being received by Amazon. Also include the FNSKU, ASIN, and quantity lost. Clear documentation showing the item was sent and not returned or sold strengthens your case.
Can I get reimbursed for inventory lost during inbound shipments to Amazon?
Yes, if the shipment shows as 'Delivered' in carrier tracking but Amazon never marks it as 'Received' in your inventory. File a 'Shipment Inbound' claim with the tracking number, delivery proof, and packing list. Amazon will investigate and reimburse if the items are confirmed lost.