How Much Money Does Amazon Owe You? A Step-by-Step Recovery Calculation Guide

Amazon owes you the sourcing cost of every unit it lost or damaged before a customer ordered it, plus the sale price minus fees for units lost after an order, minus anything it already paid. Add up the unpaid units for each claim type, multiply by the right value per unit, and you have your number.

Amazon lost and damaged inventory reimbursement follows a simple formula, but most sellers never run it. Amazon pays many losses automatically, yet it misses some, and the filing window for warehouse claims can be as short as 60 days. This guide shows you how to do your own amazon reimbursement calculation, step by step.

What Is Amazon Lost and Damaged Inventory Reimbursement?

Amazon lost and damaged inventory reimbursement is the money (or replacement units) Amazon pays an FBA seller when it loses or damages eligible inventory in its own network.

This covers units lost on the way to a fulfillment center, lost or damaged inside a warehouse, lost during a removal, or refunded to a customer but never returned. Amazon's FBA inventory reimbursement policy sets the rules for each case.

Think of it as an insurance payout that you have to check yourself. Amazon handles many warehouse losses without a claim, but sellers still need to confirm what was paid. Amazon inventory reimbursement is only as good as your records. A clean ledger is the base of every successful amazon lost and damaged inventory reimbursement claim.

How Does Amazon Calculate Reimbursement Value?

Amazon uses two formulas for amazon lost and damaged inventory reimbursement: sourcing cost for losses before a customer order, and sale price minus fees for losses after an order.

Knowing which formula fits each unit is the most important part of any amazon reimbursement calculation. The rest is multiplication.

What is the value for units lost before a customer order?

For shipment-to-Amazon claims, removal claims, and warehouse claims that happen before fulfillment, Amazon pays your sourcing cost per unit. Since March 31, 2025, Amazon no longer pays estimated sale proceeds in these cases.

Sourcing cost is what you paid to make or buy the unit. It does not include shipping, duties, or your profit margin. You enter it on the Manage Your Sourcing Cost page in the Inventory Defect and Reimbursement (IDR) portal in Seller Central. If it is missing or too low, your amazon fba reimbursement amount shrinks. Accurate sourcing cost protects every amazon lost and damaged inventory reimbursement payout.

What is the value for units lost after a customer order?

For post-order amazon lost and damaged inventory reimbursement, Amazon pays the sales price on the original order minus applicable fees. That means the referral fee and the FBA fulfillment fee come off the top.

Is there a cap on the amount?

Amazon's US policy caps reimbursement at $5,000 per eligible unit. Most sellers never reach this limit, but brand owners with high-value products should know it exists.

How to Calculate What Amazon Owes You: Step by Step

The core formula is:

Amazon fba reimbursement amount = (units lost or damaged − units already reimbursed − units found) × value per unit.

Run it for each claim type, then add the results. You can test your numbers with an amazon fba reimbursement calculator before you file.

Step 1: Pull your Inventory Ledger report

Open Seller Central and go to Reports, then Fulfillment, then Inventory Ledger. Start with the last 60 days, then work back. Look for lines marked lost, damaged, or misplaced. This is where every amazon lost inventory reimbursement audit begins.

Step 2: Pull your Reimbursements report

In the same Fulfillment section, open the Reimbursements report. Match each loss from Step 1 to a payment by FNSKU and date. Unmatched lines are your possible unpaid amazon fba reimbursement claims.

Step 3: Subtract found units

Amazon sometimes finds a lost unit and puts it back in your stock. If that happens, Amazon can reverse the payment. Subtract found units before you calculate.

Step 4: Pick the right value per unit

Use sourcing cost for pre-order losses and sale price minus fees for post-order losses. Keep purchase orders and supplier invoices ready, because sourcing cost is only as strong as the proof behind it.

Step 5: Multiply and total

Multiply unpaid units by value per unit for each SKU, then add everything together. That total is your amazon reimbursement estimate. Repeat this for every SKU so your amazon lost and damaged inventory reimbursement total is complete.

What Does a Real Reimbursement Calculation Look Like?

Here is an example of amazon lost and damaged inventory reimbursement and fee recovery in one audit: a seller finds $1,380.30 in unpaid money. The numbers are for illustration only.

Notice that the fee overcharge is the biggest line. Many sellers look only at missing units and ignore fee errors, which add up fast on high-volume products.

How to Accurately Estimate Amazon FBA Fees by Product?

To estimate FBA fees accurately, start with your product's exact weight and dimensions, then match them to Amazon's size tier and rate card.

Wrong measurements are the most common cause of overcharges. If Amazon records your product as larger or heavier than it is, you pay a higher fulfillment fee on every sale. Fee errors are a second source of recovery next to amazon lost and damaged inventory reimbursement.

1. Measure the packaged product (length, width, height) and weigh it.

2. Find the size tier and fulfillment fee in Amazon's current FBA rate card.

3. Add the referral fee, a percentage of the sale price that varies by category.

4. Add monthly storage and any other fees that apply.

5. Compare your result to what Amazon charged, using your Fee Preview report and transaction data.

If Amazon's recorded size is wrong, open a case with proof of the correct measurements. Fee audits belong in every amazon inventory reimbursement review, because the refund can cover past overcharges.

How to Get Reimbursed for Lost FBA Inventory?

To get reimbursed for lost FBA inventory, confirm the loss in your Inventory Ledger, check that Amazon has not paid it, and file a claim in Seller Central with your proof.

Amazon has paid many warehouse losses automatically since November 1, 2024. Manual claims cover what slips through. Here is the process for amazon lost inventory reimbursement:

1. Identify the missing units in your Inventory Ledger.

2. Wait for Amazon's automatic payment, then check the Reimbursements report.

3. If unpaid, open a case through Seller Central's Contact Us page, or use the claim option in the IDR portal.

4. Attach your proof: purchase invoices, FBA shipment ID, FNSKU, and dates.

5. Track the case and appeal with more proof if Amazon denies it.

Documentation decides most Amazon lost and damaged inventory reimbursement outcomes. For inbound shortages, wait until the shipment is closed, then file. Amazon needs time to finish receiving before it can confirm a shortage.

What Do Most Sellers Miss When They Estimate What Amazon Owes?

Most sellers miss four things: outdated sourcing cost, reversed payments, fee overcharges, and short claim windows.

First, a missing sourcing cost lowers your amazon fba reimbursement amount. Second, Amazon can claw back a payment when it later finds a unit, so check for reversals. Third, fee errors hide inside settlement data. Fourth, many sellers audit once a year, long after most windows have closed.

There is one more gap. Reimbursement pays cost, not profit. A unit that would have sold for $29.99 pays $12.00 if it was lost before an order. Plan your inventory with that in mind. These gaps are why audits of amazon lost and damaged inventory reimbursement so often find money.

Should You Calculate Reimbursements Yourself or Get Help?

You can do it yourself if you can audit every month, but a reimbursement service saves time and often catches more.

Refunzo reviews your ledger, matches losses to payments, and files the claims Amazon missed. Refunzo focuses on Amazon lost and damaged inventory reimbursement for US FBA sellers. For a done-for-you option, see the FBA reimbursement service from eStore Factory.

Before you hire anyone, understand the fees. Read our guide to Amazon FBA reimbursement commission rates and our breakdown of Amazon reimbursement service cost so you know what you keep after fees.

Final Takeaway

Amazon lost and damaged inventory reimbursement is a numbers game: find unpaid units, apply the right value, and file inside the window. Run the audit monthly and you stop leaving money behind.

Policy details reflect Amazon's FBA inventory reimbursement policy as reviewed in October 2026. Amazon changes these rules, so confirm in Seller Central before filing.

Frequently Asked Questions

What is Amazon lost and damaged inventory reimbursement?

It is the payment Amazon makes when it loses or damages your FBA inventory. Amazon lost and damaged inventory reimbursement pays sourcing cost before a customer order and sale price minus fees after one.

How much does Amazon owe you for lost inventory?

Amazon owes your sourcing cost per unit for losses before a customer order, and sale price minus fees for losses after an order. Multiply by unpaid units to get your amazon reimbursement estimate.

How do I get Amazon lost inventory reimbursement?

Find the loss in your Inventory Ledger, check the Reimbursements report, and file a case with invoices if Amazon has not paid. Amazon lost inventory reimbursement is often automatic, but you should verify it.

Does Amazon reimburse lost inventory automatically?

Yes, for many warehouse losses since November 1, 2024. It does not catch everything, so amazon inventory reimbursement still needs a monthly check.

How long do I have to file amazon fba reimbursement claims?

Warehouse claims generally must be filed within 60 days. Inbound shipment claims allow up to 9 months. Confirm current windows in Seller Central.

How often should I audit amazon lost and damaged inventory reimbursement?

Monthly. Because the warehouse window is 60 days, a monthly audit of amazon lost and damaged inventory reimbursement catches losses in time.

What proof do I need for a claim?

Supplier invoices, shipment IDs, FNSKU numbers, and dates of loss. Invoices should show your unit cost.

Is there an amazon fba reimbursement calculator I can use?

Yes. A calculator gives you a fast estimate, but your reports and invoices decide the final number.

What is the maximum reimbursement per unit?

Amazon's US policy caps it at $5,000 per eligible unit.

What should be on an FBA reimbursement checklist?

Reports, matched payments, found units, current sourcing cost, fee comparison, proof documents, and deadlines. The checklist above covers each item.