What is a Payment Gateway, and What Role Does it Play in Payment Processing?

A payment gateway is the technology that securely transmits payment information from your checkout experience (such as a website, invoice, virtual terminal, or point-of-sale system) to the payment processor and issuing bank, then returns an approval or decline response.

The gateway manages the technical flow of a transaction, including encryption, tokenization, authorization requests, refunds, and transaction reporting. It also commonly supports fraud prevention tools, recurring billing logic, and customer data vaulting. The gateway does not move funds or make underwriting decisions; it acts as the secure connector between your checkout and the banking system.