Understanding Interchange Fees in Credit Card Processing

By Phillip Parker|April 15, 2026

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Interchange fees are the transaction fees that a merchant’s bank (the acquiring bank) pays to the cardholder’s bank (the issuing bank) every time a customer uses a credit or debit card to make a purchase. These fees are set by the card networks—primarily Visa, Mastercard, Discover, and American Express—and represent the largest component of the total cost a business pays to accept card payments. In 2026, understanding interchange fees remains essential for any business owner who wants to control processing costs and avoid overpaying for payment processing services.

How Interchange Fees Work

When a customer swipes, dips, or taps their card at checkout, the transaction triggers a series of fees. The interchange fee flows from the merchant’s processor to the card-issuing bank to compensate for the risk of extending credit, fraud protection, and the cost of maintaining the cardholder’s account. Interchange rates are expressed as a percentage of the transaction amount plus a fixed per-transaction fee. For example, a typical interchange rate might be 1.80% + $0.10 per transaction.

Interchange rates vary significantly depending on several factors, including the type of card used (rewards cards carry higher interchange than basic cards), the merchant’s industry category (grocery stores typically pay lower rates than restaurants), the transaction method (in-person transactions with chip or contactless payment cost less than manually keyed or online transactions), and the card network. In 2026, Visa and Mastercard publish their interchange rate schedules publicly, which are updated twice a year in April and October.

Components of Credit Card Processing Fees

The total processing fee a merchant pays for each card transaction consists of three main components: the interchange fee (paid to the issuing bank), the assessment fee (paid to the card network), and the processor’s markup (the fee charged by the merchant’s payment processor for handling the transaction). Of these three components, interchange fees typically account for 70% to 90% of the total processing cost, making them the most significant expense.

Assessment fees are relatively small and non-negotiable, typically ranging from 0.13% to 0.15% of the transaction amount. The processor’s markup is the only fully negotiable component of processing fees and varies widely between providers. Understanding this fee structure is critical because some processors use pricing models that obscure the interchange component, making it difficult for merchants to identify how much markup they are actually paying.

Pricing Models and Interchange

How a processor presents interchange fees to merchants depends on their pricing model. With interchange-plus pricing, the processor passes through the actual interchange cost and adds a transparent, fixed markup on top. This model provides the most visibility into costs and is generally considered the fairest pricing structure for merchants. In 2026, interchange-plus remains the recommended pricing model for most businesses.

Tiered pricing bundles transactions into categories (qualified, mid-qualified, and non-qualified) with different rates, often hiding the actual interchange costs and inflating the effective rate on many transactions. Flat-rate pricing, used by payment aggregators like Square and Stripe, charges a single rate regardless of the card type or transaction method. While flat-rate pricing is simple, it can be more expensive for businesses with higher volumes or lower-risk transaction profiles that would benefit from lower interchange rates under an interchange-plus model.

Strategies to Lower Your Interchange Costs

While interchange rates are set by the card networks and are non-negotiable at the merchant level, there are practical strategies businesses can use to lower their effective interchange costs. Accepting payments in person with EMV chip or contactless readers qualifies transactions for lower card-present interchange rates. Ensuring that transactions include complete data (such as address verification for card-not-present transactions) can qualify them for lower rate tiers. Settling batches promptly, ideally within 24 hours, prevents transactions from being downgraded to higher interchange categories.

Businesses should also regularly review their processing statements to verify that they are receiving the correct interchange rates and that their processor is not padding interchange costs. Negotiating a lower processor markup, switching from tiered to interchange-plus pricing, and comparing offers from multiple processors are all effective ways to reduce the overall cost of card acceptance. For businesses processing significant volume, even small reductions in the processor’s markup can translate to meaningful annual savings.

About The Author

Phillip Parker

CPO Creator & Founder

Since 2009, I have researched over 1,000 merchant services providers and published hundreds of payment education-related articles. This work has received national recognition, and my expertise in payments is regularly sought by large media outlets such as CNN, MSN, and INC Magazine, among dozens of others.

Shortly after graduating from college, I was recruited into a sales role with a credit card processor. Only later did I realize that the so-called "training" centered on selling expensive processing agreements... layered with hidden fees and long-term contracts. In my earliest transactions, I unknowingly steered friends and family into costly arrangements after they trusted my recommendation. When I fully understood the structure of what I had been selling, I resigned immediately and committed myself to exposing those practices. That commitment became the foundation of this website.

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CardPaymentOptions.com

Established 2009

This website was launched in 2009 as a modest blog dedicated to exposing questionable marketing and pricing practices within the credit card processing industry and how they negatively impact small business owners. What began as a side project has since evolved into a widely recognized platform advocating for transparency, accountability, and ethical standards in merchant services.

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We analyze all costs including rate structures (interchange-plus, tiered, flat-rate, etc), monthly fees, equipment costs, early termination fees, and hidden charges. This data is gathered from service agreements, statements and client feedback.

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