Interchange

Interchange is the largest single cost component in card payment acceptance. It flows from the acquiring side of the transaction to the issuing side, representing the card network’s mechanism for compensating issuers for the float, fraud risk, and loyalty program costs embedded in payment cards.

Interchange Rate Determination

Interchange rates are published in detailed tables by Visa and Mastercard. The key variables that determine the applicable rate:

Card type: Rewards cards, premium cards (Signature, Infinite), and corporate cards attract higher interchange rates than standard debit or basic credit. The higher rate funds the rewards program the issuer offers cardholders.

Transaction environment:

• Card-present (chip/NFC): Lower interchange — fraud risk is lower.
• Card-not-present (e-commerce): Higher interchange — CNP fraud rates are higher, and the issuer absorbs more fraud risk.
• 3DS2 authenticated: Some networks offer slightly preferential rates for authenticated transactions.

Merchant category code (MCC): Certain MCCs receive preferential interchange rates. Supermarkets, fuel merchants, and utilities often receive debit interchange discounts. High-risk MCCs (travel, gambling) may attract surcharges.

Geography: Interchange varies dramatically by market. Regulated markets (EU, Australia, India) have mandated caps. Unregulated markets (US, most of Southeast Asia) see rates set by market dynamics and card network policy.

Interchange Regulation

Interchange regulation has significantly reduced costs in several major markets:

• European Union: Interchange capped at 0.2% for debit, 0.3% for credit under the Interchange Fee Regulation (IFR). This dramatically changed PSP pricing economics in Europe.
• Australia: RBA interchange benchmarks of 0.50% (credit) and 0.15% (debit) apply on average.
• India: RBI has regulated merchant discount rates for domestic debit transactions, effectively capping interchange.
• United States: The Durbin Amendment caps interchange on debit cards from large banks at 0.05% + $0.21 per transaction — but only for issuers with assets above $10 billion. Small-bank debit interchange remains unregulated.

Southeast Asia has minimal interchange regulation, leaving rates to be set by the card networks and local acquiring market dynamics.

Interchange vs. MDR

Interchange is the portion of MDR that flows to the issuer — it is not the total cost of card acceptance. MDR = Interchange + Scheme fees + Acquiring margin. Merchants negotiating MDR can only directly influence the acquiring margin component; interchange and scheme fees are set by the networks and passed through at cost.

Understanding your interchange composition (what mix of card types and transaction environments drives your volume) is prerequisite to meaningful MDR benchmarking and negotiation.