How Credit Card Processing Works: A Step-by-Step Guide for Merchants
See how credit card processing works from tap to deposit: who approves the sale, how settlement reaches your bank and where interchange fees come from.
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On this page 5 sections
Key takeaways
- Every card payment involves the cardholder, the merchant, the issuing bank, the acquiring bank, a processor and a card network.
- Authorization takes seconds, but settlement (when money reaches your bank account) usually takes one to two business days.
- Most of what you pay per transaction is interchange, which goes to the card-issuing bank, not your processor.
When a customer taps a card at your counter, the payment looks instant. But behind that two-second beep, at least four companies exchange messages, check for fraud, confirm available funds and agree on who gets paid what. This guide explains how credit card processing works, step by step. It covers who is involved, what happens during authorization, batching and settlement, and where your fees come from.
Once you understand that chain, it's much easier to read your statement, compare providers and spot fees that don't belong.
The Players: From Merchant Accounts to Card Networks
Every card transaction involves the same core participants:
- Cardholder: your customer, paying with a credit, debit or prepaid card or a mobile wallet.
- Merchant: your business. To accept cards you need a merchant account, which is an account with an acquiring bank that lets you receive card payments.
- Issuing bank (issuer): the bank that gave your customer the card. It approves or declines the purchase and bills the cardholder.
- Acquiring bank (acquirer): the bank that sponsors your merchant account and deposits card sales into your business bank account.
- Processor: the technology company that routes transaction data between you, the card networks and the banks.
- Card network: Visa, Mastercard, American Express or Discover. Each network sets the rules for its cards. Visa and Mastercard also set interchange rates and connect separate issuers and acquirers. American Express and Discover often act as the issuer and/or acquirer themselves and price their fees differently.
Providers like MannyPay work with acquiring banks and processors to set up your merchant account, equipment and pricing. They then act as your point of contact when something needs attention. You can see how those pieces fit together in MannyPay's payment processing solutions.
How Credit Card Processing Works in Three Steps
A card payment moves through three stages: authorization, batching, and clearing and settlement. Each stage affects when you get paid and what can go wrong.
Step 1: Authorization
Authorization is the "can this card pay for this?" check.
- The customer taps, dips or swipes a card, or enters card details online.
- Your terminal, POS system or online payment gateway encrypts the card data and sends it to the processor.
- The processor passes the request through the card network to the issuing bank.
- The issuer checks the account status, the available credit or balance and its fraud signals, then approves or declines.
- The response travels back the same way, and your terminal shows approved or declined.
The whole exchange typically takes a few seconds. An approval is not money in your account yet. It's a hold on the customer's funds.
Step 2: Batching
At the end of the day, approved transactions are grouped into a batch and submitted for settlement. Many terminals and POS systems close the batch automatically at a set time.
Restaurants often adjust tips before the batch closes, because the final tip amount replaces the originally authorized amount. Our restaurant payment processing guide covers that workflow in more detail.
If a batch isn't closed, those sales aren't funded. When a deposit seems to be missing, an unclosed batch is one of the first things to check.
Step 3: Clearing and Settlement
Once the batch is submitted, the networks clear the transactions. The issuers transfer funds to the acquirer, minus interchange, and the acquirer deposits the money into your business bank account.
That deposit is settlement, and for most merchants it lands in one to two business days. Some providers offer next-day or same-day funding.
High-risk merchants may see longer settlement windows or have a portion of funds held in reserve. We explain how that works in our guide to rolling reserves and how to reduce them.
Where the Fees Come From: Interchange, Assessments and Markup
Every transaction carries three layers of cost:
| Fee layer | Who receives it | Who sets it |
|---|---|---|
| Interchange | The card-issuing bank | The card networks |
| Assessments (network fees) | Visa, Mastercard, Discover, American Express | The card networks |
| Processor markup | Your processor or provider | Negotiable |
Interchange is usually the largest piece. It varies by card type, because rewards and business cards cost more than basic debit. It also varies by how the card is accepted (in person or online) and by your industry.
Only the markup is truly negotiable. How it's packaged depends on your pricing model, which we compare in interchange-plus vs. flat-rate vs. tiered pricing.
Card-Present vs. Card-Not-Present Transactions
How you accept a card changes both the cost and the risk:
- Card-present transactions (chip, tap or swipe at a terminal) generally carry lower interchange and lower fraud risk, because the card is physically verified. Explore MannyPay's retail payment options for in-person sales.
- Card-not-present transactions (online, over the phone or keyed into a virtual terminal) cost more and carry more fraud and chargeback exposure. Tools like 3-D Secure authentication add a layer of cardholder verification. For e-commerce and remote sales, see MannyPay's online payment processing.
What This Means for Your Business: Next Steps
Once you know how the chain works, three practical habits follow:
- Read your statement by layer. Separate interchange and assessments from your provider's markup so you know what you're actually paying for.
- Match the hardware to how you sell. Accepting cards in person wherever possible keeps costs and fraud lower.
- Watch your batches and deposits. Missing funding usually traces back to a batch that didn't close or to a hold. Both are fixable when caught early.
If you'd like help reviewing your current setup, request a free quote and a MannyPay specialist will get back to you within one business day. You can also contact the MannyPay team with questions.
This article is for general educational purposes and is not legal, tax or financial advice. Card network rules and state laws change; confirm current requirements for your business.
