Processors handle the technical and financial plumbing of every transaction. The right processor for a high-risk merchant is one that supports the category and offers redundancy so a single outage cannot stop checkout.
In a single card payment, the gateway captures the card details at checkout, the processor routes the authorization request through the card network to the customer's issuing bank, and the approval or decline comes back the same way in seconds. Later, the processor handles clearing and settlement so the funds reach the merchant's account through the acquirer.
The term also has two sides. A merchant (acquiring) processor works for the business accepting cards. An issuer processor works for the bank that issued the card, authorizing transactions against the cardholder's account. When merchants talk about choosing a payment processor, they mean the acquiring side.
Common questions
- What is a payment processor?
- A payment processor is the company that moves a card transaction between the merchant, the card networks and the customer's bank. It sends the authorization request, returns the approval or decline, and handles clearing and settlement so the money reaches the merchant.
- What is an issuer processor?
- An issuer processor works for the bank that issued the customer's card. It authorizes transactions against the cardholder's account on the bank's behalf. A merchant processor works for the business accepting the card. The two meet in the middle through the card network.
- What is the difference between a payment processor and a payment gateway?
- The gateway is the checkout-side technology that securely captures card details and passes them on. The processor does the work of routing the transaction through the networks and moving the funds. Many providers offer both, but they are separate jobs.