Credit Card Processing for Restaurants: Fees, Providers, and Cost-Saving Strategies

Restaurant operators tend to fixate on food cost and labor cost as the two big variables that make or break margin. They are right that those are the largest expenses. But according to the NerdWallet 2025 analysis of restaurant processing costs, credit card processing is the third largest operating expense — and unlike food and labor, it is an area where many restaurants are quietly paying more than they need to.

Understanding how processing fees actually work, and how to evaluate providers intelligently, is worth a few hours of your attention.

The Fee Structure: What You Are Actually Paying

Every credit card transaction generates fees that pass through three different entities. Understanding who collects what clarifies why the fees are what they are and where you have leverage to negotiate.

Interchange fees are paid to the card-issuing bank — the bank that issued the credit card your customer is using. These are the largest portion of processing costs, typically ranging from 1% to 3% of the transaction. Interchange rates are set by the card networks (Visa, Mastercard, American Express, Discover) and vary based on card type, transaction type, and industry. A premium rewards card has a higher interchange rate than a basic debit card. You do not pay interchange rates directly — they are built into whatever rate your processor charges you — but they form the baseline cost that every processor is paying.

Assessment fees are paid to the card network itself (Visa, Mastercard, etc.) for the use of their payment infrastructure. These are smaller — typically 0.1% to 0.2% of the transaction. Like interchange fees, these are costs your processor passes through to you.

Processor service fees are what the payment processor adds on top of interchange and assessment for the service of processing transactions, providing hardware, and maintaining the relationship. These typically add another 0.1% to 0.5%.

Combined, total processing costs typically fall between 1.5% and 3.5% of every transaction, according to the NerdWallet analysis. The US average swipe fee is approximately 2.35% per sale, based on Texas Restaurant Association data.

Flat-Rate vs. Interchange-Plus Pricing

The way processors bundle these fees creates two fundamentally different pricing models, and understanding the difference matters more for high-volume restaurants than it does for low-volume operations.

Flat-rate pricing combines all fee components into a single predictable rate. Square’s standard rate is a well-known example: 2.6% plus $0.10 per transaction. You always know exactly what you will pay. Flat-rate pricing is transparent, simple to reconcile, and straightforward to include in financial projections.

The limitation of flat-rate pricing is that it applies the same blended rate regardless of whether a customer uses a low-cost debit card (which has a real interchange cost of around 0.5%) or a premium travel rewards card (which might carry a 2.5% interchange cost). The processor captures the spread on low-cost cards and breaks even on high-cost cards. For restaurants processing significant volume, this spread adds up.

Interchange-plus pricing passes through the actual interchange rate for each transaction and adds a fixed markup on top. An interchange-plus rate might be expressed as “interchange + 0.4% + $0.08.” When a customer pays with a low-cost debit card, you pay the actual low interchange rate plus the markup. When they pay with a premium rewards card, you pay the higher interchange rate plus the same markup.

Interchange-plus is more complex to understand and reconcile — your monthly statement will show dozens of different interchange rates for different card types. But for high-volume restaurants, paying actual interchange rates on each transaction rather than a blended flat rate is consistently less expensive. The NerdWallet analysis confirms that interchange-plus typically saves money for restaurants processing significant transaction volumes.

The break-even point where interchange-plus starts saving meaningful money depends on your card mix and volume. As a rough guide, high-volume restaurants processing more than $30,000 to $50,000 monthly often benefit from exploring interchange-plus providers.

The American Express Problem

American Express consistently charges the highest processing fees among major card networks. According to the NerdWallet analysis, the difference can be 0.5% to 1% per transaction compared to Visa or Mastercard — which is a meaningful number on thousands of transactions.

This is why some restaurants have historically not accepted American Express. The decision involves a trade-off: excluding American Express eliminates the fee premium but also excludes some customers who prefer or primarily use Amex. In practice, most restaurant segments have found it worth accepting Amex to avoid customer friction, and the fee difference has narrowed somewhat over time. But if you are running a high-volume quick-service operation where transaction fees are highly visible, it is a decision worth examining with your actual card mix data.

Provider Landscape

Square is the most common flat-rate processor for smaller restaurants and a frequent choice for new operations because of its integrated POS capabilities. The 2.6% plus $0.10 standard rate is competitive for low-to-medium volume, and the integration with the Square POS eliminates a separate processing relationship. The downside is that Square’s flat-rate model becomes less competitive at high volume.

Toast Payments integrates processing directly with the Toast POS ecosystem. For restaurants already on Toast, the integration is seamless and the rates are competitive. Like most integrated POS payment solutions, it ties processing costs to the POS relationship.

Stripe operates on an interchange-plus model for higher-volume businesses and is particularly common in restaurants with significant online ordering volume. Its API flexibility makes it popular for tech-forward operators who want custom integrations.

Heartland Payment Systems and Worldpay are traditional merchant services providers that typically offer interchange-plus pricing for restaurant clients. These providers are worth evaluating for higher-volume operations where the interchange-plus structure delivers meaningful savings.

TSYS (now Global Payments) and similar enterprise processors serve larger multi-location restaurant groups where negotiating custom rates is possible and the volume justifies the engagement.

Where You Can Actually Save

Negotiate your markup. Interchange rates and assessment fees are set by the card networks and are non-negotiable. Processor markup is negotiable, particularly for businesses with significant transaction volume. If you are processing more than $50,000 per month and have a clean processing history, ask for a rate review.

Move to interchange-plus if volume justifies it. If you are on a flat-rate plan processing significant volume, get quotes from interchange-plus providers and run the math on your actual card mix. The transition involves more complexity in your statements but often delivers real savings.

Reduce manual entry transactions. Card-not-present and manually entered transactions carry higher interchange rates than swiped or tapped transactions. Phone orders entered manually into a terminal cost more per transaction. If you have a high volume of manual entry transactions, a better online ordering system that accepts cards through a secure hosted payment page can reduce those costs.

Review your statement regularly. Processors occasionally add fees, adjust rates at contract renewal, or charge miscellaneous service fees that appear on statements. A monthly statement review to catch unexpected fee additions is a useful habit.

The Surcharge Question

Some restaurants are now adding credit card surcharges to customer bills — passing the processing fee directly to customers who choose to pay by card. The NerdWallet analysis notes that this practice is legal in most states (with notable exceptions including Colorado and Massachusetts, where surcharging is prohibited) but comes with trade-offs.

Customers generally do not like surcharges. There is evidence that visible card surcharges create negative guest experiences and can affect repeat business, particularly in full-service dining where the relationship between guest experience and return visits is critical.

→ Read more: POS System Comparison

→ Read more: Restaurant Data Privacy and PCI Compliance Quick-service operations where price transparency is the norm may handle surcharges more gracefully.

Cash discount programs — where the listed price is the cash price and card-paying customers pay a small premium — are a legally distinct version of the same concept, but consumer perception tends to be similar.

The National Restaurant Association has been actively advocating for congressional action to reduce swipe fees industry-wide. Until that changes, the decision to surcharge remains a business and guest experience judgment call that operators need to evaluate for their specific market and customer base.

→ Read more: Restaurant Financial KPIs

The bottom line: credit card processing is a real cost center that deserves the same analytical attention you give food cost and labor. Most operators have at least some room to reduce fees through better pricing model selection, negotiation, or reducing high-cost transaction types. The savings may not transform your economics, but they are real money that compounds over time.