Interchange Rate Estimator

Interchange fees are the largest component of payment processing costs, typically accounting for 70-90% of the total fee you pay per transaction. These fees are set by Visa and Mastercard and paid by the merchant's acquiring bank to the cardholder's issuing bank every time a card transaction is processed.

Rates vary significantly depending on your Merchant Category Code (MCC), the type of card used (debit vs. credit, consumer vs. commercial, rewards vs. basic), whether the card is present or not, and how the transaction data is submitted. A grocery store with mostly debit card transactions will pay far less in interchange than an eCommerce business processing predominantly rewards credit cards.

Most aggregators (like Stripe, Square, and PayPal) charge a flat rate — typically 2.9% + $0.30 — regardless of your actual interchange costs. This simplifies billing but means you overpay on every debit transaction and every low-risk category where true interchange is well below that flat rate.

Interchange+ (or "cost-plus") pricing passes through the actual interchange rate set by the card networks and adds a small, transparent markup. For most merchants processing over $10,000/month, Interchange+ delivers significant savings because you only pay the true cost of each transaction plus a known margin — no hidden padding.

Beyond choosing the right pricing model, there are several strategies to minimize interchange: ensure your MCC is classified correctly, settle transactions within 24 hours to avoid downgrades, submit Level II/III data for commercial cards, use address verification (AVS) and CVV for card-not-present transactions, and encourage debit card and PIN debit usage where possible.

PaySec's payment optimization engine applies these strategies automatically, routing transactions to achieve the lowest qualified interchange rate on every swipe, dip, and tap.