About This Payment Fee Calculator
Use the payment fee calculator to estimate what a processor keeps from each transaction and what you actually receive. Payment fees often combine a percentage of the charge with a fixed per-transaction amount, and sometimes additional international, currency, chargeback, or platform fees.
The goal is to make the calculation useful before a seller commits to a product, listing, promotion, or marketplace channel. Commerce Tally keeps the calculator visible near the top of the page and adds this guide so you can understand which inputs matter, how the result should be interpreted, and what to check next before relying on a number.
How to Use the Calculator
- Enter the charge amount or desired net amount.
- Enter the processor percentage fee and fixed fee.
- Add international or additional fees if needed.
- Review fee total and net received.
- Use the result when setting prices, invoices, or minimum order thresholds.
How the Math Works
A processor fee is typically charge amount times percentage rate plus a fixed transaction fee. For low order values, the fixed fee can be a large share of the sale. To gross up a charge, the calculator solves for the amount needed after percentage and fixed fees.
Calculator results are estimates, not official platform statements. Marketplace fees, processor rates, carrier charges, taxes, return costs, and discounts can change by category, region, seller account, customer location, and timing. Use the result as a planning checkpoint, then confirm important assumptions with your marketplace dashboard, accounting records, shipping software, or a qualified professional.
Interpretation Tips
- Low-ticket items are more sensitive to fixed payment fees.
- International cards and currency conversion can add extra cost.
- Processor fees should be included in product margin and invoice pricing.
- Chargebacks and refunds may have separate rules not captured by a simple fee estimate.
Payment Fee Calculator FAQ
Why do fixed fees matter?
A 30 cent fixed fee is minor on a large order but significant on a small order.
Can I pass payment fees to customers?
Rules vary by location, card network, platform, and contract. Check before adding surcharges.
Are refunds included?
Refund fee handling varies by processor and should be checked separately.