What is a payment processing fee?
A payment processing fee is the charge a payment provider takes each time it accepts a card or digital payment for your business. It normally combines a percentage of the sale with a fixed per-transaction amount, and it may include extra charges for international cards, currency conversion or tax on the fee itself.
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How to use the Payment Processing Fee Calculator
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Pick a processor to auto-fill its standard rate, or type your own percentage and fixed fee.
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Enter your average transaction amount and how many transactions you process each month.
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Add the share of international cards and any tax charged on fees.
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Read your monthly fees, effective rate and net payout on the right.
Key takeaways
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Most online processors charge a percentage plus a fixed fee, for example 2.9% + $0.30.
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The fixed fee makes small payments more expensive in percentage terms than large ones.
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International cards and tax on fees raise your effective rate above the headline rate.
Business Use Cases
Beyond calculating costs, businesses often need Stripe API integrations, subscription billing, marketplace payments, payment automation, and custom fintech workflows.
