Interchange Fee

What Is an Interchange Fee?

An interchange fee is a per-transaction charge that flows from the merchant's bank (the acquirer) to the cardholder's bank (the issuer) every time a consumer pays with a credit or debit card. Set by card networks such as Visa and Mastercard, interchange fees compensate the issuing bank for the costs of underwriting credit risk, preventing fraud, and maintaining cardholder accounts.

For merchants, interchange is typically the single largest line item in the cost of accepting card payments. It is bundled into the broader merchant discount rate alongside scheme fees charged by the card network and the acquirer's markup. On a $100 credit card purchase, approximately $1.75 goes to the issuing bank as interchange, $0.18 goes to the card network, and a smaller amount goes to the acquirer: leaving the merchant with roughly $98 or less.

How It Works

Every card payment triggers a multi-party flow of funds and fees. Understanding this flow clarifies why interchange exists and who ultimately bears the cost.

1. The cardholder taps, inserts, or enters their card details at a point-of-sale terminal or online checkout. The transaction request is sent to the merchant's payment processor (the acquirer).
2. The acquirer forwards the transaction to the card network (Visa, Mastercard, or another scheme), which routes it to the cardholder's issuing bank for authorization.
3. The issuing bank checks the cardholder's account, approves or declines the transaction, and sends the response back through the network to the acquirer and merchant.
4. At settlement (typically within one to two business days), the issuing bank deducts the interchange fee from the transaction amount and transfers the remainder to the acquirer.
5. The acquirer deducts its own markup and passes the net amount to the merchant's bank account.

What Determines the Rate

Visa and Mastercard publish interchange schedules containing hundreds of rate categories. The rate applied to any given transaction depends on several factors:

• Card type: rewards cards, premium cards, and corporate cards carry higher interchange than standard consumer cards. Issuers use interchange revenue to fund cardholder rewards programs.
• Transaction method: card-present transactions (tap, chip insert) have lower rates than card-not-present transactions (online, phone orders) because the fraud risk is lower when the physical card is verified.
• Merchant category code (MCC): supermarkets, utilities, and charities often qualify for reduced interchange rates, while higher-risk categories pay more.
• Transaction size: some interchange categories use a flat fee component plus a percentage, meaning the effective rate shifts depending on the dollar amount.
• Region: interchange rates vary dramatically by jurisdiction. The EU caps consumer interchange at 0.2% for debit and 0.3% for credit, while unregulated US credit card interchange averages around 1.8%.

Typical Rates

Visa and Mastercard typically update their interchange schedules twice per year, in April and October, which means merchants must continuously monitor rate changes.

Regulatory Landscape

Because interchange fees are set by card networks rather than negotiated by merchants, regulators in several jurisdictions have intervened to cap rates and promote competition.

United States: the Durbin Amendment

Enacted in 2010 as part of the Dodd-Frank Act, the Durbin Amendment directed the Federal Reserve to limit debit card interchange fees for banks with more than $10 billion in assets. The resulting Regulation II set a cap of $0.21 per transaction plus 0.05% of the transaction value, with an additional $0.01 allowed for issuers meeting certain fraud-prevention standards.

In August 2025, a US District Court vacated the Regulation II interchange fee cap, ruling that the Federal Reserve's methodology exceeded its statutory authority. The court stayed the vacatur pending appeal, so the existing cap remains in effect while litigation continues. The Durbin Amendment does not cap credit card interchange, which remains unregulated in the US.

European Union: the Interchange Fee Regulation

The EU's Interchange Fee Regulation (IFR), effective since 2015, caps consumer card interchange at 0.2% for debit and 0.3% for credit within the European Economic Area. Corporate and commercial cards are exempt from these caps, creating an incentive for issuers to reclassify consumer cards as commercial products. Industry groups have noted that while interchange fell, card network scheme fees rose to offset the reduction, leaving total merchant costs higher than before the regulation in some cases.

Why Interchange Matters for Crypto Payments

Interchange fees represent a structural cost of the legacy card payment system: a cost that alternative payment rails can potentially eliminate. This is one of the core economic arguments for merchant adoption of cryptocurrency and dollar-denominated digital payments.

Traditional card processing costs merchants 1.5% to 3.5% per transaction domestically, and up to 5% to 7% for cross-border sales when foreign exchange spreads and additional surcharges are included. By contrast, crypto payment processors typically charge 0.4% to 1% per transaction, and on-chain stablecoin transfers or Layer 2 settlement can reduce costs even further.

The savings are most significant for three merchant categories:

• Cross-border commerce: international card transactions incur the highest interchange categories plus FX fees. Stablecoin settlement on networks like Spark eliminates both the interchange and the currency conversion markup.
• High-volume, low-margin businesses: for merchants operating on thin margins (grocery, fuel, wholesale), even a 1% reduction in payment processing costs can meaningfully improve profitability.
• Subscription and recurring billing: card-not-present interchange rates apply to every recurring charge. A push payment model using crypto rails avoids these recurring fees entirely.

For a deeper analysis of how card network economics shape merchant payment costs, see the research article on card network economics. For merchants exploring Bitcoin payment integration, the Bitcoin merchant payments guide covers practical implementation considerations.

Use Cases

Interchange Optimization

Merchants and their payment processors invest significant effort in interchange optimization: structuring transactions to qualify for lower rate categories. Techniques include sending enhanced transaction data (Level II and Level III data for B2B transactions), using address verification, and settling transactions promptly. Payment orchestration platforms route transactions through networks and processors that offer the lowest interchange for each specific card and transaction type.

Interchange-Plus Pricing

Many payment processors offer interchange-plus pricing models, where the merchant pays the actual interchange rate plus a fixed markup. This is generally more transparent and cost-effective than flat-rate or tiered pricing, because the merchant can see exactly what goes to the issuing bank versus the processor. Understanding interchange categories is essential for merchants evaluating processor pricing.

Surcharging and Cash Discounting

In jurisdictions where it is permitted, some merchants add a surcharge to card transactions to offset interchange costs, or offer a discount for cash and debit payments. These practices are regulated differently by state and country, and card network rules impose additional restrictions on how surcharges can be applied.

Risks and Considerations

Cost Shifting

Experience in the EU has shown that capping interchange alone may not reduce total merchant costs. Card networks can increase scheme fees to compensate for lost interchange revenue, and issuers may shift cardholders to exempt card categories (corporate or commercial cards). Any analysis of interchange regulation must consider the full merchant cost stack, not just the interchange component.

Rewards Program Funding

Interchange revenue funds the cashback, miles, and points programs that make premium credit cards attractive to consumers. Regulations that reduce interchange can lead to reduced rewards, higher annual fees, or the elimination of free banking services. This creates a tension: merchants benefit from lower interchange, but their customers may lose valued card benefits.

Small Bank Exemptions

The Durbin Amendment exempts banks with under $10 billion in assets from debit interchange caps. In practice, card networks often set similar rates for exempt and non-exempt issuers, limiting the intended competitive benefit for smaller institutions. Regulatory carve-outs do not always produce their intended market effects.

Cross-Border Complexity

For merchants operating across multiple jurisdictions, interchange rates, regulations, and card network rules differ significantly. A transaction involving a US-issued card used at an EU merchant falls outside the IFR caps and may incur inter-regional interchange rates exceeding 2%. This complexity is one reason merchants increasingly explore alternative settlement methods for international commerce.

This glossary entry is for informational purposes only and does not constitute financial or investment advice. Always do your own research before using any protocol or technology.