Enter an invoice amount and your processing rate to see exactly what the fee takes out and what actually lands in your account. Compare two rates side by side, and see what the difference costs over a year. Free, and no signup needed.
Fees come off every payment you collect. A flat monthly price does not.
Most invoicing tools quote a monthly price, but that is rarely the whole cost. If your client pays by card, the payment processor takes a percentage of the invoice plus a small fixed amount per transaction, and that comes off the top of every single payment you collect. A tool with no subscription can still cost more per month than a paid one once your invoice volume is real. This calculator turns the percentage into the dollar figure it actually represents on your own invoices.
Nearly every processor uses the same shape: a percentage of the payment, plus a fixed amount per transaction. Some bank payment rates also set a minimum fee.
Fee = (Invoice Amount x Percentage / 100) + Fixed Fee If a minimum applies: Fee = the greater of that result and the Minimum Fee You receive = Invoice Amount - FeeOn a $2,000 invoice at 2.9% plus $0.60, the fee is $58.60 and you receive $1,941.40. The percentage is what scales: the fixed part barely moves, but the percentage grows with every invoice you send.
Enter your invoice amount and pick a payment method, or choose Custom rate and type in your own percentage and fixed fee. The percentage and fixed fields stay editable whichever preset you pick, so you can always match your own provider's exact numbers. Add your invoices per month to see what the same rate costs across a month and a year, and use Compare with another rate to put two options side by side.
The gap between two rates looks trivial per invoice and significant per year. Ten invoices a month at $2,000 is $240,000 billed annually. At 2.9% plus $0.60 that is roughly $7,032 in fees. At 1% with a $1 minimum it is roughly $2,520. The per-invoice difference is small enough to ignore, and the annual difference is not. That is the calculation worth running before you pick a tool, not after.
Processor pricing moves, and it differs by product, country, and how the payment is taken. The presets here are starting points, not quotes. Confirm the current rate with your own provider before making a decision based on it, and use the Custom rate option to enter exactly what you are charged.
Wave preset figures: card 2.9% plus $0.60, American Express 3.4% plus $0.60, bank payment 1% with a $1 minimum, as reported by NerdWallet's Wave Accounting review, 2026. The "typical online rate" preset is a common industry shape (2.9% plus $0.30), not a quote from any one provider.
This calculator provides estimates for planning purposes. Your actual fees are set by your payment provider's current pricing and your own agreement with them.
Working out what to charge in the first place? Try the free margin calculator. Chasing an invoice that is already overdue? The late fee calculator works out what you are owed.
Billbooks prices per organization with every feature included, so what you pay does not scale with how much you get paid.
Try Billbooks FreeFree to start · No credit card needed