What is Credit Card Processing? Credit card processing is the multi-step system that allows businesses to accept non-cash payments. It involves the electronic transfer of data and funds between a merchant, an acquiring bank, the card networks (Visa/Mastercard), and the card-issuing bank. For business owners, the "cost" of credit card processing is the sum of interchange fees, network assessments, and processor markups. Expert Verified & Fact-Checked From the Desk of: Chris Du