Free Calculators

Payment Processing Tools

Four calculators to help you estimate processing costs, compare pricing models, and understand your chargeback exposure. All math runs in your browser — no data is stored or transmitted unless you request a copy.

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Pricing Model

Interchange Plus vs. Flat Rate

See how much interchange-plus pricing could save versus a standard flat-rate plan at your monthly volume, average ticket, and card mix.

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Zero-Fee Model

Surcharging Savings Calculator

Estimate your net processing cost after passing credit card fees to customers, with a state-by-state legality reference for all 50 states.

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Zero-Fee Model

Cash Discount Break-Even Calculator

Model your processing costs under a cash discount program and find the cash adoption rate at which your card processing cost falls to near zero.

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Risk

Chargeback Cost Calculator

Quantify your total monthly exposure from chargebacks, dispute fees, and voluntary refunds — and see how your chargeback ratio compares to industry thresholds.

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Calculators give you a starting point, not a final quote

The figures these tools produce are estimates based on industry averages and the assumptions you enter. Your actual processing costs depend on your exact card mix, merchant category code, equipment setup, and negotiated rates. A free statement analysis gives you exact numbers based on your real processing history.

Get Your Free Statement Analysis

Ready to See Your Real Numbers?

Send us your current merchant statement and we'll show you exactly what you're paying and what you'd pay with GoPayhawk — line by line.