Payment processing

Payment processing fees are charges applied at different stages of a card or digital payment: when a transaction is authorized, when funds are moved to a merchant’s account, and on a recurring basis for access to payment infrastructure. They are billed by several separate parties—card networks, issuing banks, acquiring banks, payment gateways, and processors—yet they all reduce the net revenue a business keeps from each sale.

The most common misunderstanding in this category is that the quoted rate represents the total cost. In practice, that rate is usually only the markup applied by the processor; underneath it sits the interchange fee set by the card network, plus fixed per-transaction charges and conditional fees that only trigger under specific circumstances, such as a disputed transaction or a payment made with an international card.

Fees in this category

• Card processing fees explained — charged as a percentage, a flat amount, or both on each approved card transaction.
• Chargeback fees — triggered when a cardholder disputes a transaction and the issuing bank initiates a reversal.
• Cross-border payment fees — applied when the card or account used belongs to a different country or currency zone than the merchant.
• Interchange vs markup fees — interchange is set by the card network and passed through to the merchant; the markup is the processor’s layer added on top.
• Invoicing platform fees — charged by software that generates and tracks invoices, either per invoice sent, per active user, or as a fixed monthly subscription.
• Monthly gateway fees — a fixed recurring charge for maintaining access to the payment gateway, applied regardless of transaction volume.
• Payout and settlement fees — applied when collected funds are transferred from a processor or platform to the merchant’s bank account.

How to compare costs in this category

• Total annual cost — calculate the combined cost across all fee types at your actual transaction volume and average order value, not just the headline percentage rate.
• What triggers each charge — identify whether a fee is per transaction, per month, per dispute, or conditional on transaction type so you can model realistic cost scenarios.
• What is avoidable or reducible — determine which fees disappear or decrease if you change payment methods, lower your dispute rate, or adjust settlement frequency.
• Price-change notification terms — check how much notice the provider must give before changing any fee and whether rate increases require your active consent.
• Bundled vs unbundled pricing — flat-rate bundles conceal the individual cost components; interchange-plus or unbundled pricing makes each layer visible and easier to benchmark against alternatives.

Charges that catch people out

• Minimum monthly fees — if processing volume falls below a set threshold, a floor charge applies to make up the shortfall; easy to miss during low-volume periods.
• Chargeback administration fees — beyond any refunded transaction amount, a separate per-dispute fee is charged by the processor even if the merchant wins the case.
• Currency conversion margins — cross-border transactions often carry a hidden spread applied to the exchange rate, sitting on top of any separately stated cross-border fee.
• Early termination fees — closing or switching a gateway or processing contract before the agreed term ends can trigger a substantial one-off penalty.

Fees change over time and the provider’s own published fee schedule is the authoritative source for current amounts.