Credit card processing fees are the percentage and per-transaction charges that merchants pay to accept card payments, not fees you pay as a cardholder
When you swipe or tap a credit card at checkout, the merchant pays a processing fee to the card network and the merchant's bank. These fees typically range from 1.5% to 3.5% of the transaction amount, plus a flat per-transaction charge of 5 to 30 cents. The exact amount depends on the card type (rewards cards cost more than basic cards), the merchant's business category, their sales volume, and the payment processor they use.
As a cardholder, you do not pay processing fees directly. But merchants often build these costs into prices, so processing fees indirectly affect what you pay. Understanding how these fees work helps explain why some merchants prefer certain payment methods and why some small businesses have minimum purchase requirements for card payments.
Key Takeaways
- Processing fees are paid by merchants, not cardholders, and typically run 1.5% to 3.5% of the sale plus a per-transaction charge.
- Rewards cards and premium cards cost merchants more to process than basic cards because the card issuer takes a larger cut.
- Interchange fees (set by Visa and Mastercard) make up the largest portion of processing costs and vary by card type and merchant category.
- Small merchants often pay higher processing rates than large chains because they have less negotiating power with payment processors.
- Some merchants pass processing costs to customers through higher prices, minimum purchase requirements, or surcharges on card payments.
The three parts of a processing fee: interchange, assessment, and processor markup
A processing fee is actually three separate charges stacked together. The largest piece is the interchange fee, which goes to your card issuer (your bank). Visa and Mastercard set interchange rates, and they vary by card type and merchant category. A rewards card might have an interchange rate of 2.2%, while a basic card might be 1.5%. A grocery store pays a different rate than a gas station or an online retailer.
The second piece is the assessment fee, which goes to the card network (Visa, Mastercard, American Express, or Discover). This is typically 0.11% to 0.15% of the transaction. The third piece is the processor markup, which goes to the merchant's payment processor — the company that actually handles the transaction. This markup varies widely depending on the processor and the merchant's contract, but it often ranges from 0.3% to 1% of the transaction plus the per-transaction fee.
A typical $100 purchase on a rewards card at a restaurant might break down like this: 2.2% interchange ($2.20) to the card issuer, 0.13% assessment ($0.13) to the card network, 0.5% processor markup ($0.50) to the payment processor, and a $0.30 per-transaction fee to the processor. Total: $3.13, or 3.13% of the sale.
Why rewards cards cost merchants more than basic cards
Merchants pay higher processing fees for rewards cards because the card issuer has to fund the rewards program. When you earn 2% cash back or 3 points per dollar, that cost is built into the interchange fee the merchant pays. A card that offers no rewards has a lower interchange rate because the issuer has fewer costs to recover.
This is why some merchants — particularly small businesses with thin margins — prefer customers to use basic cards or debit cards. A debit card typically has an interchange fee under 1%, while a premium rewards card can be 2.5% or higher. Over thousands of transactions, this difference adds up significantly.
Merchants cannot legally refuse a card based on the rewards it offers, but they can set minimum purchase amounts for card payments or offer a discount for cash. Some merchants also add a surcharge for credit card payments, though this is prohibited in some states and by some card networks.
How merchant category affects processing rates
Visa and Mastercard assign every merchant a category code based on what they sell. Supermarkets, gas stations, restaurants, online retailers, and nonprofits all have different interchange rates. A supermarket might pay 1.05% interchange on a basic card, while a restaurant pays 2.2% on the same card. This reflects the card networks' assessment of risk and fraud rates in each category.
Online retailers typically pay higher rates than brick-and-mortar stores because card-not-present transactions carry more fraud risk. A restaurant pays more than a supermarket because dining transactions are considered higher-risk. Nonprofits often get lower rates as an incentive to accept cards for donations.
Merchants cannot change their category code, but they can shop around for processors that offer better rates within their category. A restaurant owner might negotiate a lower processor markup by switching to a different payment processor or by bundling services.
The difference between what large chains and small merchants pay
A large retailer like Target or Walmart negotiates processing rates directly with Visa and Mastercard because of their transaction volume. They might pay 1.5% to 2% total on most cards. A small coffee shop with no negotiating power pays whatever their payment processor charges, which is often 2.7% to 3.5% total.
This gap exists because large merchants process millions of dollars monthly and can threaten to switch processors or networks. Small merchants process far less volume and have little leverage. Payment processors also charge small merchants higher per-transaction fees — sometimes $0.30 to $0.50 per transaction versus $0.10 for large chains.
Some small merchants use third-party payment platforms like Square, Stripe, or PayPal to reduce costs. These platforms offer flat rates (often 2.6% plus $0.30 per transaction) that are sometimes lower than traditional merchant accounts, though the rates are still higher than what large retailers pay.
How processing fees affect prices you pay as a customer
Merchants absorb processing fees as a cost of doing business, but many pass some or all of the cost to customers through higher prices. A coffee shop that pays 3% in processing fees might charge $5.50 for a latte instead of $5.35 to cover that cost. You pay the same price whether you use cash or card, so the cost is spread across all customers.
Some merchants use surcharges instead, adding a percentage to the card price but not the cash price. This is legal in most states for credit cards (though not for debit cards), but Visa and Mastercard prohibit surcharges above the actual processing cost. A few states — California, New York, Texas, and others — prohibit surcharges entirely.
Minimum purchase requirements for card payments are another way merchants manage processing costs. A merchant might require a $10 minimum for card purchases to avoid processing a $2 transaction that costs them $0.15 in fees. This is legal in most places.
What you should know about interchange-optimized pricing
Some payment processors offer interchange-plus pricing, which means the merchant pays the actual interchange rate set by Visa or Mastercard, plus the processor's markup. This is more transparent than flat-rate pricing because the merchant can see exactly what Visa and Mastercard charge.
Other processors use flat-rate pricing, charging the same percentage regardless of card type or merchant category. A flat rate of 2.9% plus $0.30 per transaction is simpler to understand but may be higher or lower than interchange-plus depending on the merchant's mix of card types.
As a cardholder, you do not choose the merchant's pricing model — the merchant does. But understanding that rewards cards cost merchants more explains why some small businesses encourage cash payments or offer discounts for paying by check or bank transfer.
Frequently Asked Questions
Do I pay credit card processing fees as a customer?
No, you do not pay processing fees directly. The merchant pays them to the card network and payment processor. However, merchants often build these costs into their prices, so you may indirectly pay for processing fees through higher prices at checkout.
Why do some merchants have a minimum purchase requirement for cards?
A small transaction costs the merchant a fixed per-transaction fee (often $0.30) plus a percentage. On a $2 purchase, that fee might be 15% of the sale. A $10 minimum ensures the merchant does not lose money on the transaction.
Can a merchant charge me extra for using a credit card?
In most states, yes — merchants can add a surcharge for credit card payments, though the surcharge cannot exceed the actual processing cost. Debit card surcharges are prohibited by Visa and Mastercard. A few states prohibit credit card surcharges entirely.
Why do online purchases sometimes cost more than in-store?
Online retailers pay higher processing fees because card-not-present transactions carry more fraud risk. The card networks charge higher interchange rates for online sales, so retailers often pass that cost to customers through higher prices.
What is the difference between interchange and processing fees?
Interchange is the fee your card issuer charges the merchant. Processing fees include interchange plus the card network's assessment and the payment processor's markup. Processing fees are the total cost the merchant pays.