Per-transaction fee
Definition: A fee charged on each sale or payment processed — typically a small percentage plus a fixed amount. The core of payment-processor pricing.
Why it matters when comparing prices
Do not compare the headline rate; compare the effective rate — total fees divided by total volume — computed from a real month of your sales. Flat-rate structures like Square's suit smaller or spikier volume, while interchange-plus suits higher steady volume, and the crossover only shows up in your own numbers.
Related products
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