Credit card processing: How it works and what it costs your business

Credit card processing moves money from your customer's card to your bank account through four participants: the cardholder, the merchant, the issuing bank, and the acquiring bank. Card networks like Visa, Mastercard, and American Express carry the transaction between the banks. The whole flow takes seconds at checkout, but settlement, when funds actually reach your account, can take longer.

For small business owners, the real cost of credit card processing is rarely the single percentage rate advertised by a processor. Interchange fees, processor markups, per-transaction charges, and monthly account fees stack up across every sale, and they vary by card type, payment method, and risk profile. Understanding where each cent goes is the first step to lowering credit card processing fees and protecting cash flow.

How does credit card processing work?

Credit card processing moves money in four steps: card data capture, routing, authorization, and settlement. The same flow applies whether a customer taps a phone in-store or completes an online payment in an ecommerce checkout.

Here is how a standard credit card processing workflow operates from checkout to payout.

Step 1: Card data capture

At the point-of-sale or virtual terminal, the customer provides their card information by swipe, tap, or mobile payment such as Apple Pay. The POS or payment gateway encrypts the cardholder data before it leaves your device. This encryption satisfies the requirements of the Payment Card Industry Data Security Standard, or PCI DSS, the global security framework maintained by the PCI Security Standards Council. The current version, PCI DSS v4.0.1, sets the encryption, access control, and monitoring rules that every business handling card data must follow.

Step 2: Routing through the payment processor

Your payment processor receives the encrypted transaction and forwards it through the appropriate card network, such as Visa, Mastercard, or American Express. The card network identifies the issuing bank and sends the authorization request onward. At this stage, fraud prevention rules, transaction volume thresholds, and payment methods are evaluated automatically.

Step 3: Authorization by the issuing bank

The issuing bank reviews the credit card transaction, checking the cardholder's available balance, spending behavior, and fraud signals. The issuing bank then approves or declines the payment and sends the response back through the same processing system to your POS or payment gateway in seconds.

Step 4: Settlement by the acquiring bank

Once approved, the acquiring bank, also called the merchant bank, requests funds from the issuing bank. After interchange fees, transaction fees, and processing costs are deducted, the net amount is transferred to your merchant account. Settlement timing is set by the agreement between the acquiring bank and the merchant, not by the card networks themselves. According to the OCC Comptroller's Handbook on Merchant Processing, the timing of payments to merchants is specified in that acquirer agreement. Traditional merchant services typically fund your bank account in one to three business days, though some acquirers offer next-day or same-day funding.

Modern mobile payment solutions shorten this settlement window. JIM, for example, makes funds available in seconds on a JIM Visa Prepaid Card after each Tap to Pay sale, so business owners can spend earnings immediately instead of waiting for bank processing.

The hidden players: who takes a cut?

Every credit card payment moves through a network of financial institutions and service providers. Each participant collects a small portion of the transaction, which is why processing costs are rarely limited to a single flat fee.

• Payment processor: Connects your point-of-sale or virtual terminal to the card networks and your merchant account. The payment processor manages transaction routing, fraud prevention tools, PCI DSS compliance, and customer support across in-person payments and online payment flows.

• Card networks: Visa, Mastercard, and American Express operate the global rails that carry credit card transactions between banks. These card networks define interchange fees, dispute rules, and security requirements for all credit card processing companies.

• Issuing bank: The cardholder's bank that approves or declines each transaction. The issuing bank releases funds, monitors fraud activity, and absorbs financial risk when unauthorized credit card payments occur.

• Acquiring bank (merchant bank): Your merchant bank that settles approved payments into your bank account. It deducts transaction fees and interchange fees before issuing payouts, typically within one to three business days for traditional merchant services.

Credit card processing fees: what you actually pay

Most business owners see a single percentage rate but never the full pricing model behind it. Credit card processing fees are built from multiple cost layers that vary by transaction type, payment method, and risk profile. In 2026, the average effective rate for U.S. merchants ranges from 1.5% to 3.5% of the transaction amount, plus a flat fee of $0.10 to $0.30 per transaction.

• Interchange fees: Set by card networks and paid to the issuing bank for every debit card or credit card transaction. Visa publishes its USA Interchange Reimbursement Fees and Mastercard publishes its U.S. merchant interchange rates. For a standard card-present consumer credit transaction in 2026, Visa CPS Retail runs 1.51% + $0.10 and Mastercard Consumer Core runs 1.58% + $0.10. Rewards and premium cards push interchange higher: Visa Rewards Signature reaches 2.10% + $0.10, and Mastercard World Elite reaches 2.30% + $0.10. Card-not-present ecommerce transactions carry higher interchange because of added fraud risk.

• Assessment fees: Charged by the card networks on top of interchange. Visa's assessment is 0.14% and Mastercard's is 0.13% to 0.14% depending on transaction size. These apply to every transaction regardless of your pricing model.

• Processor markup: The payment processor's margin added on top of interchange and assessment fees. This covers the processing system, payment gateway infrastructure, fraud prevention tools, and ongoing PCI compliance obligations. Markup ranges from roughly 0.20% to 0.50% for interchange-plus pricing, and is bundled into the flat rate for flat-rate processors.

• Per-transaction fees: Flat fees charged per transaction regardless of sale size. These are especially noticeable for small-ticket ecommerce or mobile payment businesses with high transaction volume.

• Monthly and hidden fees: Many merchant services providers charge monthly fees for account maintenance, PCI DSS programs, chargeback handling, or ACH reporting. PCI compliance fees typically run $99 to $150 per year, and monthly account maintenance fees range from $10 to $50. These hidden fees often appear only after onboarding and inflate long-term processing costs.

What does credit card processing cost in 2026?

Your total effective rate depends on your pricing model, card mix, and transaction volume. Here is how the fee stack breaks down on a $100 in-person credit card sale using average 2026 interchange rates and a typical interchange-plus markup.

Swap in a rewards card and interchange alone jumps to 1.65% to 2.10% + $0.10, and a card-not-present ecommerce transaction adds another 0.30% to 0.40% on top. That is why two businesses with the same processor can pay very different effective rates.

Traditional vs. modern payment processing

Businesses today generally choose between legacy merchant services and newer mobile payment solutions. The differences affect everything from cash flow timing to the hardware required at checkout. Here is how the two models compare across the dimensions that matter most.

Traditional credit card processing

This setup relies on a dedicated merchant account, physical POS systems, and long-term service contracts. It is still common for brick-and-mortar stores with high transaction volume and complex POS needs.

• Requires separate merchant accounts with underwriting by financial institutions.
• Depends on physical POS systems and card reader hardware for in-store checkout.
• Uses interchange-plus or tiered pricing models that change with card networks and payment methods.
• Delivers payouts to your bank account in one to three business days.
• Often includes monthly fees, PCI compliance charges, and hidden fees that raise processing costs.

Modern mobile and online processing

Mobile-first payment processing solutions combine point-of-sale, payment gateway, and virtual terminal functionality into a single app.

• Allows business owners to accept credit card payments without a card reader using contactless payments such as Apple Pay.
• Supports ecommerce, online store checkout, and in-person payments within one processing system.
• Uses flat rate pricing models that simplify budgeting and pricing transparency.
• Provides faster payouts, improving cash flow for small business operations.
• Reduces reliance on traditional merchant services contracts and complex merchant account setups.

How to choose the right credit card processor

Choosing a payment processor affects your processing costs, customer experience, and exposure to fraud and chargebacks. Before committing to any credit card processing company, evaluate your business needs across volume, risk, and payment options. For a side-by-side comparison of providers and pricing models, see JIM's guide to the best credit card processing for small business.

• Look at pricing structure: Compare flat rate versus interchange-plus pricing models and review all transaction fees, including hidden monthly fees that inflate long-term processing costs. A provider advertising 2.5% can cost more than one charging 2.9% once monthly fees and compliance charges are included.
• Estimate your transaction volume: Calculate your average ticket size, monthly credit card transactions, and expected growth across ecommerce and in-store checkout. High-volume businesses benefit from interchange-plus pricing; low-volume businesses usually pay less with a flat rate.
• Verify security and PCI compliance: Ensure the provider meets PCI DSS requirements to protect cardholder and customer data. A PCI-compliant processor absorbs most of the compliance burden for you.
• Assess fraud and chargeback protection: Review fraud prevention tools, chargeback handling workflows, and chargeback fees. A chargeback is a transaction reversal initiated by the cardholder's bank when they dispute a charge. Processors typically charge $15 to $100 per disputed transaction, on top of losing the sale amount. For a full breakdown of how disputes work and how to reduce them, see JIM's guide to credit card chargebacks.
• Confirm payout speed and customer support: Check how many business days it takes for payouts to reach your bank account and whether customer support is accessible when payment processing issues arise. Faster payouts improve cash flow, especially for businesses with thin margins.

Key terms to know

• Interchange fee: A fee set by card networks and paid to the issuing bank on every card transaction. It is the largest single component of your processing cost.
• Acquiring bank: The bank that holds your merchant account and settles approved payments into your business bank account.
• Issuing bank: The bank that issued the customer's credit or debit card and approves or declines each transaction.
• Payment gateway: The service that encrypts and transmits card data from your checkout to the payment processor.
• Effective rate: Your total processing cost divided by total sales volume. It is the true percentage you pay, including all fees and markups.

Take control of your credit card processing and protect your cash flow

Credit card processing touches every part of your business, from checkout speed to transaction fees, chargebacks, and how long payouts take to reach your bank account. Understanding how the processing system works helps business owners reduce processing costs and make informed decisions about payment solutions.

JIM simplifies the way small businesses accept credit card payments by turning your iPhone into a point-of-sale without requiring a card reader or complex merchant services setup. JIM charges a flat 1.99% per Tap to Pay transaction, with no monthly fees, no setup costs, and no premium-card surcharges. Funds land on your JIM Visa Prepaid Card in seconds after each sale, compared to the one to three business days typical of traditional processors. That means stronger cash flow and fewer surprises on your monthly statements.

You saw that interchange and assessments alone take 1.65% to 2.24% of a typical in-person sale before any processor markup. JIM's flat 1.99% rate sits below what most small businesses pay in total effective rate, with no hardware to buy. Explore JIM and start accepting contactless payments in minutes.