What Merchants Actually Pay When You Swipe Your Card

Merchants pay between 1.5% and 3.5% of each transaction to accept credit cards, though the exact amount depends on the card type, the merchant's business, and their payment processor.

When you buy something with a credit card, the merchant doesn't keep all the money you hand over. A portion goes to the card network (Visa, Mastercard, American Express), the bank that issued your card, and the payment processor handling the transaction. These costs are called interchange fees, assessment fees, and processing fees. Together, they're what merchants refer to as their "discount rate" — the percentage they lose on every sale.

The reason this matters to you: merchants sometimes pass these costs along through higher prices, minimum purchase requirements, or surcharges on card payments. Understanding what they're paying helps explain why some businesses prefer cash or debit cards, and why small shops sometimes ask you to spend a minimum amount.

Key Takeaways

• Interchange fees — paid to your card's bank — make up the largest chunk of what merchants pay, typically 1% to 2% per transaction.
• American Express and Discover charge merchants higher fees than Visa and Mastercard, which is why some small businesses don't accept them.
• A merchant's total cost depends on their industry, sales volume, and the payment processor they use.
• Merchants can legally add a surcharge to credit card purchases in most states, though many choose not to.

How the money splits between the card network, your bank, and the processor

When you swipe or tap a credit card, the payment doesn't go straight from your bank to the merchant. It flows through several hands, and each one takes a cut. The largest piece goes to your card's bank — the one that issued your card to you. This is the interchange fee, and it typically ranges from 1% to 2.5% of the transaction amount, depending on the card type and merchant category.

The card network itself (Visa, Mastercard, American Express, or Discover) takes a smaller fee called an assessment fee, usually 0.1% to 0.3%. Then the merchant's payment processor — the company that actually moves the money and handles fraud prevention — charges a processing fee, which can be a flat amount per transaction (like $0.30) plus a percentage (like 2%), or some combination.

A typical breakdown on a $100 credit card purchase might look like this: the merchant receives roughly $97 to $98.50, with the remaining $1.50 to $3 split among the card's bank, the network, and the processor. On a small transaction, the flat fees hurt more — a $5 coffee purchase might cost the merchant $5.15 to $5.35 in total fees.

Why American Express and Discover cost merchants more

Not all credit cards cost merchants the same amount. Visa and Mastercard are four-party networks — they connect the customer's bank, the merchant's bank, the customer, and the merchant, but they don't issue cards themselves. American Express and Discover are two-party networks — they issue their own cards and handle both sides of the transaction. Because they take on more of the work, they charge merchants higher fees.

Visa and Mastercard interchange fees typically range from 1% to 2.5%, depending on the card type and merchant category. American Express interchange fees usually run 2.5% to 3.5%, and Discover's are similar. This difference adds up quickly for high-volume merchants. A restaurant processing $10,000 a day in credit card sales might pay $100 to $250 daily in Visa and Mastercard fees, but $250 to $350 in American Express fees on the same volume.

This is why you'll sometimes see signs saying "We don't accept American Express" or "American Express adds a 3% surcharge." The merchant is passing the cost directly to you because the fee cuts too deeply into their profit margin.

How a merchant's business type affects their fees

Credit card processors sort merchants into categories — restaurants, retail stores, gas stations, nonprofits, online sellers — and each category has different interchange rates. A grocery store pays different fees than a jewelry store, which pays different fees than a gas station, even if they all process the same card type.

Restaurants and bars typically pay higher interchange rates because credit card fraud is more common in those categories. A restaurant might pay 2.5% to 3% on Visa transactions, while a grocery store pays 1.5% to 2%. Online merchants (card-not-present transactions, where you can't see the physical card) pay even higher rates because fraud risk is higher — sometimes 2.5% to 3.5% for Visa alone.

Nonprofits and government agencies often negotiate lower rates because they're considered lower-risk. A nonprofit might pay 1.5% to 2% on the same Visa card that costs a restaurant 2.8%. Payment processors also offer volume discounts — a large chain processing millions in transactions monthly pays a lower percentage than a small shop processing thousands.

Flat fees and monthly charges merchants also pay

Beyond the per-transaction percentage, merchants typically pay additional fees that don't show up on your receipt. Most payment processors charge a monthly gateway fee (the software that processes payments), which ranges from $10 to $30. They may also charge a statement fee ($5 to $15 monthly) and a PCI compliance fee ($10 to $100 monthly, depending on the processor) to cover the cost of keeping payment data secure.

Some processors charge a batch fee each time the merchant settles their daily transactions — typically $0.25 to $1 per batch. If a merchant settles once daily, that's $7.50 to $30 monthly just for batch fees. Merchants also pay for chargebacks (when a customer disputes a charge), usually $15 to $100 per chargeback, plus the cost of the original transaction.

For a small business processing $5,000 monthly in credit card sales, these flat and monthly fees might add $50 to $150 on top of the percentage-based interchange and processing fees. That's why some small merchants prefer cash — it has no fees at all.

Why some merchants add surcharges or set minimum purchase amounts

In most states, merchants are legally allowed to add a surcharge to credit card purchases — typically 2% to 4% — to offset their fees. However, they must disclose the surcharge before you complete the purchase, and they cannot surcharge debit cards or American Express in most states (some state laws vary). Despite being legal, most merchants don't surcharge because they worry it will drive customers away.

Minimum purchase requirements are more common. A coffee shop might require a $5 minimum for card purchases because the flat fees ($0.30 plus a percentage) eat too much of a small transaction's profit. On a $2 coffee, the merchant might pay $0.50 to $0.70 in fees, leaving almost nothing. With a $5 minimum, the fees are still $0.40 to $0.60, but they're a smaller percentage of the sale.

Some merchants offer a discount for cash or debit card purchases instead of surcharging credit cards. This is also legal and often feels friendlier to customers — you see a discount rather than a penalty.

How payment processors and merchant size affect the total cost

Not all payment processors charge the same rates. Large processors like Square, Stripe, and PayPal offer standardized rates to small merchants (often around 2.6% plus $0.30 per transaction for Visa and Mastercard). Traditional merchant services providers, which work with larger businesses, negotiate custom rates based on volume and business type.

A solo freelancer using Stripe might pay 2.9% plus $0.30 on every transaction. A mid-sized restaurant with a dedicated merchant services account might negotiate 2.2% plus $0.25. A large retail chain might pay 1.8% plus $0.15. The difference compounds over time — on $100,000 in monthly sales, the difference between 2.9% and 1.8% is $1,100 monthly.

Merchants also have leverage through their processor. If they're processing high volume or have low chargeback rates, they can sometimes negotiate lower rates. A merchant with a history of fraud or chargebacks will pay higher rates or be rejected entirely.

Frequently Asked Questions

Can a merchant charge me more for using a credit card?

Yes, in most states. Merchants can add a surcharge of up to 4% for credit card purchases, but they must tell you the surcharge before you pay. They cannot surcharge debit cards or American Express in most states. Some merchants offer a discount for cash or debit instead of surcharging credit.

Why do some stores ask for a minimum purchase with a card?

Flat fees ($0.30 or more per transaction) make small purchases unprofitable. On a $2 purchase, the merchant might pay $0.50 in fees. A $5 minimum ensures the fees are a smaller percentage of the sale, so the merchant actually makes money.

Do debit cards cost merchants less than credit cards?

Yes, significantly. Debit card interchange fees are capped by federal law at 0.05% plus $0.21 per transaction, compared to 1% to 3.5% for credit cards. This is why some merchants prefer debit and may offer discounts for it.

Why don't all merchants accept American Express?

American Express charges merchants 2.5% to 3.5% per transaction, compared to 1% to 2.5% for Visa and Mastercard. For a business with thin profit margins, the extra cost isn't worth it, especially if most customers use Visa or Mastercard anyway.

Do online purchases cost merchants more in fees?

Yes. Card-not-present transactions (online, phone, mail order) have higher fraud risk, so interchange fees are typically 0.5% to 1% higher than in-person purchases. A merchant might pay 2.5% for a Visa swipe but 3% to 3.5% for the same card used online.