Operations

Return rate loss calculator

See how much returns quietly cost you per month and what your true margin is after refunds and recovery.

No sign-up required

What this calculator does

A return is not just a refund. It is the lost fee, the return shipping, the restocking work, and the product you may not be able to sell again. This calculator adds all of that up so you can see what returns really cost.

It takes your return rate and order volume and works out your net loss per return, your monthly cost of returns, and your true margin once returns are spread across every order. It even accounts for the share of returned product you can recover and resell. The headline margin on a sale is rarely the margin you actually keep.

Try it now
Product & revenue
Selling price
$
Product / COGS
$
Shipping to customer
$
Platform & processing fees %
%
Return details
Return rate % 8%
Return shipping cost (you pay)
If you cover the return label
$
% of returns resellable
Items you can restock and resell
%
Volume
Monthly orders 500
Monthly loss to returns
—
—
Monthly returns (units)
—
estimated
Net loss per return
—
true cost per returned unit
True net margin
—
after return impact
Annual return loss
—
projected yearly cost
Return rate impact scenarios
Return rate Monthly loss True net margin
Estimates only. Not financial, tax, or legal advice. Return costs vary by category, carrier, and platform policy. Full legal disclaimer

How to use the calculator

Enter your selling price, product cost, shipping, and platform fee, plus your return shipping and restocking cost and the percentage of returned items you can resell. Use the sliders for your return rate and monthly orders. The tool shows your loss per return, your monthly return cost, and your true margin after returns. Nothing you type is saved.

A worked example you can follow

Here is the default scenario: a $55 product costing $12, with $6 shipping, a 10% platform fee, $5 of return shipping and restocking, 40% of returns resellable, an 8% return rate, and 500 orders a month.

Worked example · 8% returns on 500 orders

What returns really cost

Returns this month (8% of 500)40 orders
Net loss per return−$23.70
Monthly cost of returns−$948

Those 40 returns cost about $948 a month, or roughly $11,400 a year, and they pull your true margin down to about 53.8% from the headline figure on a clean sale. Recovering and reselling 40% of returned product softens the blow but does not erase it.

Reverse logistics, the cost most sellers ignore

Returns are a full business process running in the opposite direction, and each step has a cost. You refund the sale, you often eat the original platform fee, you pay to ship the item back, someone inspects and restocks it, and some portion of the product cannot be resold at full value. Economists call this reverse logistics, and for many ecommerce categories it is one of the largest hidden costs on the income statement.

The most useful shift this calculator encourages is from thinking about margin per sale to thinking about margin per cohort. Your true margin is not the margin on the orders that stick; it is the margin across all orders once the returned ones are accounted for. A product with a great headline margin and a high return rate can be less profitable than a modest one that rarely comes back. Reducing returns, through better sizing information or product descriptions, often improves profit more than raising prices.

Using this to make better decisions

Measure your true margin after returns, then decide where to act. If returns are eating your profit, the highest-value fixes are usually upstream: clearer sizing, better photos, and honest descriptions that reduce the returns in the first place. This is general educational guidance, not financial advice.

Glossary of terms

New to selling online? Every term this calculator uses is defined below in plain language, with a quick example where it helps. No prior experience assumed.

Return rate
The share of your orders that customers send back, as a percentage.Example: an 8% return rate on 500 orders is 40 returns.
Net loss per return
The money you cannot recover on a single returned order after the refund, lost fee, return shipping, restocking, and any resale recovery.
True margin
Your margin across all orders once the cost of returns is spread over them, as opposed to the margin on a clean sale.
Reverse logistics
The process and cost of handling returned goods: refunds, return shipping, inspection, restocking, and resale.
Restocking cost
The labor and handling cost of processing a returned item back into sellable inventory.
Recovery / resale rate
The share of returned product you can sell again at value, which reduces the loss per return.
Cohort margin
Margin measured across a whole group of orders, including the returned ones, rather than per surviving sale.

Frequently asked questions

Why does a return cost more than the refund?

Because you also lose the original platform fee, pay return shipping and restocking, and often cannot resell the item at full value. The calculator adds all of these into the net loss per return.

What is a true margin?

It is your margin once the cost of returns is spread across every order, not just the orders that were kept. A high return rate can make your true margin much lower than the headline figure.

Does the calculator store the numbers I enter?

No. Everything is calculated locally in your browser and nothing is collected or transmitted.

Is this financial advice?

No. The results are estimates for your own planning, not financial or accounting advice.

More calculators