Amazon FBA Reimbursement Calculator

How to Use the Amazon FBA Lost Inventory Reimbursement Calculator

The Amazon FBA lost inventory reimbursement calculator answers a simple question: how much money can you recover, and how much do you actually lose, when some of the inventory you send does not reach customers? Enter three numbers, and the tool immediately shows two results.

How to use the calculator:

1. Lost units — enter how many units you consider lost. The default is 25.
2. Value / unit — enter the value of one unit in your marketplace currency. The default is $12.
3. Percentage of returned value — enter the share of value you expect to recover. The default is 80%.
4. Read the results: estimated refund and net loss.

Example with the default values: 25 units x $12 = $300. At an 80% rate, the estimated refund is $240.00, and the net loss is $60.00. The two results add up to the full value of the lost inventory.

The calculations run in your browser, so you see the result right away. You can test several scenarios one after another by changing the values in the fields.

Where to Get the Lost Unit Count and Unit Value

The number of lost units is usually the hardest part, because it is not in one ready-made place. The simplest approach is to use your own data: inventory discrepancy reports, shipment history, shortage claims, and Seller Support correspondence. Add up the units you could not account for in the period you choose, then divide by the number of such periods to get a typical figure.

• A short period, such as one month, shows the current situation but may be random.
• A longer period, measured over several months, better shows the average and helps with planning.
• Separate figures for different products can be more accurate if the items vary widely in value.

For unit value, decide which amount you want to enter. It is your choice, and the result depends on it. Most often, people use the value the product has in the platform settlement. If you want to test a cautious scenario, enter a lower amount; if you want an optimistic one, enter a higher amount, and compare both results.

Keep in mind that the values and rates in the calculator are estimates and editable. Check the current settlement rules in Amazon's fee schedule and documentation before making decisions.

What Is Refund Rate and What Recovery Rate Should You Enter?

The refund rate tells you what share of the value of lost inventory you manage to recover. It is not a fixed value — it is a field you fill in yourself. The tool starts at 80%, but you can change it to any other value.

Where can you get your number?

• Review your own claim history: compare the value of lost units with the amount you actually received.
• If you are just starting and have no data, test a few scenarios with lower and higher rates to see how the result changes.
• For high-value products, a more conservative rate gives a more cautious picture.

The rate you enter works both ways. At 80%, you recover 80% of the value and lose 20%. It is worth comparing results across a few options so you know how much your estimate depends on the rate you choose.

Do not treat the default 80% as a promise or guarantee. It is only a starting point that you can adjust to your own experience. Before you build a budget on it, verify the current settlement terms in Amazon's fee schedule.

How to Interpret Estimated Refund and Net Loss

The calculator shows two results that should be read together.

For the default values: 25 units at $12 each is $300 of value. At an 80% rate, the estimated refund is $240.00, and the net loss is $60.00. The two amounts always add up to the full value of the lost units.

How to use these numbers in practice:

1. Run a cautious scenario with a lower rate and check whether the loss is acceptable to you.
2. Compare the result with the cost of buying the inventory to judge whether the problem requires a change to packing or shipping.
3. Repeat the calculation from time to time to see whether the scale of losses is rising or falling.

Both results are estimates based only on the three numbers you enter. The better you choose the lost unit count and unit value, the closer the picture will be to your real situation.

Limitations: What the Tool Does Not Calculate — Amazon Fees, VAT, Cost of Goods, and Rate Verification

The calculator is simple by design and calculates only what you enter. It deliberately leaves out everything that would require additional data.

• It does not include fees — it does not add referral fees, storage fees, fulfillment fees, or other platform costs.
• It does not include taxes or VAT — the result shows inventory value without tax settlement.
• It does not include cost of goods — it does not check what you paid the supplier or what shipping cost.
• It does not convert currencies — amounts are in the marketplace currency; if you want to calculate in another currency, enter your own rates.
• It does not check current fee schedules — it does not verify whether the rate you enter matches current rules.
• It does not know your individual terms — your agreements with the platform may produce different amounts than the rate you enter.

That is why the result is an estimate. Treat it as a starting point for comparing against an actual settlement or for budgeting, not as a final balance. Always check the current fee schedule and platform documentation, because rates change.

Frequently Asked Questions

Results are estimates; before deciding, check current Amazon FBA reimbursement policies and fee schedules.