Payment fee calculator

How to use it

1. Choose a provider, or enter a custom percentage and fixed fee.
2. Add a marketplace fee on top if there is one.
3. Enter the price, or the amount you want to receive.
4. Read the fees and the result.

Worked out in your browser

Nothing you type here is sent to Sellstamp or anyone else; the numbers, keys and text are made in this tab.

Where the fees come from

Each preset is the standard rate on the provider’s own pricing page for the stated country, read on 23 October 2026: Stripe 2.9% + $0.30 for US cards (international cards add 1.5%, currency conversion 1%); PayPal Checkout 3.49% + $0.49 and PayPal card payments 2.99% + $0.49 in the US; Paddle and Lemon Squeezy 5% + $0.50 as merchants of record. Your rate can differ by country, volume or contract, so check your own account. Gumroad is not a preset: its pricing page did not make clear whether card processing is charged on top, so use the custom fields with your own figures.

The arithmetic

Fee = price × percentage + fixed fee, rounded to the cent. To receive a set amount, price = (amount + fixed fee) ÷ (1 − percentage), rounded up so you are never a cent short.