Credit card processing fees are the percentage and flat charges that merchants pay every time you swipe, tap, or enter your card number
When you use a credit card at a store or online, the merchant pays a fee to accept that payment. This fee typically ranges from 1.5% to 3.5% of the transaction amount, plus a flat per-transaction charge of 20 cents to 30 cents. The exact amount depends on the card brand (Visa, Mastercard, American Express, Discover), the type of card (rewards cards cost more than basic cards), how the payment is processed (in-person, online, or by phone), and the merchant's negotiated rate with their payment processor.
You do not pay these fees directly at checkout. Instead, merchants build them into their prices, or absorb them as a cost of doing business. Some merchants pass the cost along through higher prices for cardholders or lower prices for cash customers. Understanding what these fees are helps explain why some businesses prefer certain payment methods or set minimum purchase amounts for card transactions.
Key Takeaways
- Merchants pay 1.5% to 3.5% of each transaction plus a flat fee per transaction, with rewards cards costing more than standard cards.
- Visa and Mastercard set interchange rates (the largest part of the fee), while American Express and Discover typically charge higher rates overall.
- Online and phone transactions cost merchants more than in-person payments because there is no physical card to verify.
- Small businesses often negotiate lower rates than large chains, but still pay significantly more than cash transactions cost.
- Merchants can legally refuse credit cards, set minimum purchase amounts, or offer discounts for cash, though some states restrict these practices.
How the fee breaks down: interchange, assessment, and processor markup
A credit card processing fee is actually three separate charges stacked together. The largest piece is the interchange fee, which goes to the card issuer (your bank). Visa and Mastercard set these rates, and they vary by card type and transaction method. A basic Visa might have a 1.29% interchange rate, while a rewards Visa might be 2.25%. American Express and Discover do not use the interchange model — they charge the merchant a single blended rate that covers everything, typically 2.5% to 3.5%.
The second piece is the assessment fee, which goes to Visa, Mastercard, American Express, or Discover themselves. This is usually 0.11% to 0.13% of the transaction and is non-negotiable.
The third piece is the processor markup, which is what the payment processor (the company handling the technical side) keeps. This is where merchants can negotiate. A large retailer might negotiate a 0.25% markup, while a small business might pay 0.5% to 1.5%. This is the only part of the fee that varies based on merchant size and bargaining power.
Why rewards cards cost more than basic cards
Rewards cards carry higher interchange rates because the card issuer is paying for those rewards out of the interchange fee. A card that gives 2% cash back costs the merchant roughly 0.5% to 1% more in processing fees than a basic card with no rewards. Premium travel cards with annual fees and high rewards rates can push interchange rates above 2.5%.
This is why some merchants discourage rewards card use or set minimum purchase amounts — they are trying to offset the higher cost. A merchant might accept a basic Visa at 1.5% but lose money on a premium rewards card at 2.5% if the transaction is small enough.
In-person versus online and phone transaction fees
Merchants pay less to accept a card in person than online or over the phone. When you insert or tap your card at a physical terminal, the merchant has verified that the card is real and you are present. When you enter your card number online or read it over the phone, there is no physical verification, so the risk of fraud is higher.
An in-person Visa transaction might cost 1.51% plus 5 cents. The same transaction online could cost 2.29% plus 15 cents. Phone transactions often fall between the two. This is why online retailers sometimes ask for a CVV, billing address, and zip code — they are trying to reduce their fraud risk and lower their processing fees.
What American Express and Discover charge differently
American Express and Discover operate on a different model than Visa and Mastercard. Instead of an interchange fee plus assessment, they charge merchants a single blended rate. American Express typically charges 2.5% to 3.5% per transaction, while Discover charges 1.56% to 2.53%. Both are higher on average than Visa and Mastercard, which is why some smaller merchants do not accept American Express.
American Express also has higher minimum monthly processing fees for some merchant accounts, and they require merchants to accept all American Express cards if they accept any. This means a merchant cannot accept American Express Platinum (which has a $695 annual fee and high rewards) while declining American Express Green. Visa and Mastercard allow merchants to accept some card types and decline others.
How business type affects processing fees
Merchants in high-risk industries pay higher processing fees. A grocery store might negotiate rates around 1.5% to 2%, while a gas station, restaurant, or online retailer pays 2% to 3%. Subscription services and recurring billing can cost even more because the merchant is charging the card without the cardholder present each time.
A merchant selling digital goods (software, e-books, music) typically pays 2.9% to 3.5% because digital transactions cannot be reversed or returned the way physical goods can. A merchant selling physical goods in a brick-and-mortar store pays less because the customer can return the item if there is a problem.
What merchants can do about processing fees
Merchants can legally refuse to accept credit cards entirely and accept only cash, checks, or other payment methods. They can also set a minimum purchase amount for card transactions — typically $5 to $10 — though some states restrict this. A few states prohibit merchants from offering discounts for cash, but most allow it.
Merchants cannot charge a surcharge (an extra fee added to the bill) for credit card use, except in a few states where it is allowed with specific restrictions. However, they can offer a discount for cash or other payment methods. A merchant might display prices as "cash price $9.99, card price $10.49" rather than charging a surcharge.
Large merchants negotiate lower rates by threatening to switch processors or by consolidating multiple locations. Small merchants have less leverage but can still shop around — rates vary between processors for the same merchant type. A small business might pay 2.9% with one processor and 2.6% with another.
Frequently Asked Questions
Do I pay credit card processing fees as a customer?
Not directly. The merchant pays the fee, but they often pass the cost along through higher prices. Some merchants offer cash discounts instead, which is the same thing from a different angle. You never see a separate line item for processing fees on your receipt.
Why do some stores have a minimum purchase amount for cards?
The merchant is trying to avoid losing money on small transactions. If you buy a $2 item with a card, the merchant pays roughly 5 to 10 cents in fees, which is 2.5% to 5% of the sale. On a $2 transaction, that cuts deeply into profit. A $5 or $10 minimum makes the fee a smaller percentage of the sale.
Can a merchant charge me extra for using a credit card?
In most states, no. Merchants cannot add a surcharge to your bill for paying with a credit card. They can offer a discount for cash or other payment methods, but not a penalty for cards. A few states allow surcharges under specific conditions, so check your state's rules if you see one.
Why does American Express cost merchants more?
American Express does not use the interchange model and charges a higher blended rate to cover both the card issuer's costs and their own. They also have higher minimum fees and stricter rules about which cards merchants must accept. Visa and Mastercard spread costs across more merchants, so individual rates are lower.
Do debit cards have lower processing fees than credit cards?
Yes, usually. Debit card interchange rates are typically 0.5% to 1.5%, significantly lower than credit cards. This is why some merchants prefer debit cards and why they might offer a discount for debit or cash but not for credit cards.