Zero cost credit card processing. Follow the money.

A processing statement can contain percentage fees, per-transaction fees, network charges, account fees and one-time or annual charges. A zero cost offer may shift the percentage and transaction expense away from the merchant, but each remaining charge still matters. Ask whether the offer covers credit, debit, prepaid, online, keyed, refunds and tips. A headline that applies only to in-person credit sales cannot describe the whole business.

There are two separate questions. First, who pays the customer-facing price difference? Second, what still reaches your merchant statement? A customer may pay a higher displayed card price while the processor still bills you fees. Your net result is card revenue minus those charges, cash revenue after any discount, and the effect of changes in sales volume. The fee calculator can help establish your existing baseline, but its comparison settings are illustrative rather than a Payment USA quote.

“No processing fees” can mean “fees are offset by higher card revenue,” even when the statement still shows charges. Request both projected statement charges and projected net margin after price changes. Those views should reconcile. If a provider presents only a savings figure without proposed prices and a complete fee schedule, the comparison is incomplete.

Visa’s U.S. guidance places a credit surcharge at the lower of applicable merchant discount rate or 3%, requires advance notice to the acquirer, and bars it on debit and prepaid. Mastercard’s U.S. guidance also bars debit and prepaid and links its cap to acceptance cost, with a published maximum of 4% for brand-level surcharging. Mastercard’s current registration form says it is not presently requiring U.S. merchants to register intent on that site while its rules are updated. Have the acquirer confirm current notification steps before launch. Network rules, local law and the full merchant agreement all matter.

This model deliberately holds transactions, prices and payment behavior constant. In reality, customers may change method or leave, tax treatment may differ, and the processor may price the surcharge revenue. A cash-discount proposal needs its own model because cash buyers receive a lower price; a lower statement bill can coexist with lower cash receipts.

For a separate cash-discount illustration, suppose an item has a $100 regular card price and a disclosed $97 cash price. Cash buyers pay $97, while credit and debit buyers pay $100 before tax. If card acceptance costs $2.60, a card sale nets $97.40 before other expenses and a cash sale yields $97 before cash-handling costs. The amounts are close by assumption, not inherently equal. A $30 monthly account charge remains even when the price difference covers the transaction fee.