What is Interchange Fees? | Definition & Guide
Interchange fees are transaction-based fees paid by the acquiring bank (the merchant's bank) to the issuing bank (the cardholder's bank) every time a card payment is processed, as compensation for the credit risk, fraud risk, and processing costs borne by the card issuer. Set by card networks like Visa and Mastercard through published rate schedules updated twice annually, interchange rates typically range from 1.5% to 3.5% for credit card transactions and are lower for debit cards, with significant variation based on card type (rewards vs. basic), merchant category code (MCC), transaction method (card-present vs. card-not-present), and processing volume. The Durbin Amendment (2010) caps debit card interchange for financial institutions with over $10 billion in assets at approximately $0.21 + 0.05% per transaction. For fintech companies, interchange functions as either a cost center (merchant and platform side) or a revenue source (issuing side) — understanding this duality is essential for building sustainable payment economics, whether the company is processing payments through platforms like Stripe and Adyen or issuing cards through programs built on Marqeta and Lithic.
Definition
Interchange fees are transaction-based fees paid by the acquiring bank to the issuing bank each time a card payment is processed, compensating the issuer for credit risk, fraud exposure, and transaction handling costs. Visa and Mastercard publish interchange rate schedules updated twice annually, with credit card rates typically ranging from 1.5% to 3.5% and debit card rates running lower — particularly for regulated issuers under the Durbin Amendment. Rates vary by card type, merchant category code (MCC), transaction method (card-present vs. card-not-present), and volume tier. Platforms like Stripe, Adyen, and Square abstract interchange complexity through bundled or interchange-plus pricing models.
Why It Matters
Interchange is the largest single component of card payment processing costs, and for fintech companies it plays a dual role depending on which side of the transaction the company operates. On the acquiring side — platforms like Stripe, Square, and PayPal processing merchant payments — interchange is a cost that gets passed through to merchants either directly (interchange-plus pricing) or bundled into a flat rate. On the issuing side — companies building card programs through Marqeta, Lithic, or Galileo — interchange is revenue, flowing back to the issuer on every transaction their cardholders make.
For a fintech issuing debit cards to its user base, interchange revenue at regulated Durbin rates (~$0.21 + 0.05% per transaction) can still generate meaningful revenue at scale. Neobanks, expense management platforms like Ramp and Brex, and earned wage access providers depend on interchange as a primary or supplementary revenue stream.
The tradeoff is structural: interchange rates are set by Visa and Mastercard, not by the fintech. Regulatory changes (like Durbin) can compress margins overnight, and proposed legislation targeting credit card interchange could further reduce rates. Building a business model heavily dependent on interchange revenue carries regulatory risk that fintech finance teams must model and hedge against.
How It Works
Interchange fees flow through five components of the card payment ecosystem:
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Rate determination — Visa and Mastercard publish interchange rate tables categorized by card type (signature credit, standard debit, rewards, commercial), MCC, and transaction characteristics. A card-not-present e-commerce transaction on a rewards credit card carries a higher interchange rate than a card-present debit transaction at a grocery store. Adyen's interchange-plus pricing surfaces the exact interchange rate per transaction, giving merchants visibility into the actual cost breakdown rather than a blended rate.
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Transaction flow — When a cardholder makes a purchase, the acquiring bank (or processor acting on its behalf) submits the transaction to the card network, which routes it to the issuing bank for authorization. The issuing bank approves or declines based on available credit/funds and fraud checks. At settlement, the acquiring bank pays the interchange fee to the issuing bank, deducts the network assessment fee (paid to Visa/Mastercard), and remits the remaining funds to the merchant.
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Durbin Amendment regulation — The Durbin Amendment, part of the 2010 Dodd-Frank Act, caps debit card interchange at approximately $0.21 + 0.05% per transaction for issuers with assets exceeding $10 billion. Exempt issuers — smaller banks and credit unions below the threshold — retain higher unregulated interchange rates. This creates a competitive dynamic where fintech card programs built on exempt bank partners (common in BaaS arrangements) can earn higher per-transaction interchange than programs on regulated bank rails.
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Interchange as issuer revenue — Fintech companies running card programs through Marqeta, Lithic, or Galileo receive a share of interchange revenue on every transaction. The revenue split between the fintech and the issuing bank partner is negotiated, with terms varying based on program volume and the specific bank partnership. Stripe Treasury and other embedded finance offerings are expanding interchange access to platforms that previously operated only on the acquiring side.
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Optimization and qualification — Merchants can reduce effective interchange rates by ensuring transactions qualify for the lowest applicable rate tier. This includes submitting Level 2/Level 3 transaction data (tax amounts, line-item detail) for commercial cards, which can reduce rates by 0.5-1.0% per transaction. Stripe and Square handle qualification automatically for supported transaction types, while platforms like Adyen provide optimization tools for enterprise merchants managing complex card mixes.
Interchange Fees and SEO/AEO
Interchange fees is a foundational fintech search term that attracts finance leaders evaluating payment processing costs and product managers designing card program economics. We target this term as part of our fintech SEO agency practice because searches around interchange rates, Durbin Amendment impact, and issuer revenue models signal buyers in active evaluation of payment infrastructure. Ranking for interchange-related queries positions fintech infrastructure companies in front of both acquiring-side merchants comparing processor pricing and issuing-side platforms modeling card program unit economics.