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Card Minimum Purchase Calculator

The smallest sale where the card fee stays under your chosen percentage.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: Fixed fees make small card payments expensive. Minimum = fixed fee ÷ (max fee % − percentage fee). Check local rules and card-network rules on minimums.

How to use it (step by step)

  1. 1Fill in the boxes: “Percentage fee (%)”, “Fixed fee”, “Most you accept as fee (%)”. Example numbers are already there so you can see how it works; replace them with yours.
  2. 2The result updates instantly as you type (on a phone it is below the boxes).
  3. 3The bold line is the main answer. Tap Copy next to any value to copy it.

Words to know

Percentage
A part out of 100. 25% of 200 = 50.

More in Cards & Payments

Fee Gross-Up Calculator (Charge to Receive)How much to charge so you receive an exact amount after card fees.Card Surcharge CalculatorAdd a card surcharge to a price, or find the surcharge that exactly covers your fee.Merchant Discount Rate (MDR) CalculatorMonthly MDR cost, tax on MDR and net settlement from your card sales.Interchange++ Fee CalculatorBreak a card fee into interchange, scheme fee and acquirer markup (IC++ pricing).Effective Processing Rate CalculatorYour real card-processing cost: total fees ÷ total card volume from your statement.Chargeback Ratio CalculatorYour dispute/chargeback ratio and how many more you can have before hitting a threshold.