By Abhay Ray 
If you are a credit card user, you would have come across a number of terms that explain the various charges, financial parameters, and key metrics associated with it. But do you know what an interchange fee is? Interchange fee is probably the most important element in the world of credit cards and keeps the cycle of financing the purchases running uninterrupted. Every time you use a credit card to make a purchase, the merchant’s bank account is levied an interchange fee. The merchant’s bank (acquiring bank) recovers it from the merchant in due course after giving she/he certain discounts. “Interchange is a small fee paid by a merchant’s bank (acquirer) to a cardholder’s bank (issuer) to compensate the issuer for the value and benefits that merchants receive when they accept electronic payments,” according to Mastercard, the global payment card services behemoth.
What is Interchange Frees?
Interchange fees are transaction fees charged between banks for processing credit and debit card payments. When a customer makes a purchase using a card, the business’s acquiring bank pays the interchange fee to the cardholder’s issuing bank.
Card networks set interchange fees, which are typically a percentage of the transaction amount plus a fixed fee. The interchange fee depends on various factors, including the type of card used (credit or debit), the type of transaction (in person or online), the industry of the business, and the region where the transaction occurs.
Interchange fees serve several purposes:
Compensation for issuing banks: Interchange fees compensate the cardholder’s issuing bank for the costs of providing and maintaining the payment card, managing the associated accounts and managing the risk involved in extending credit.
Incentives for issuing banks: Higher interchange fees can incentivise issuing banks to promote payment cards to customers. This encourages cardholders to use the cards, benefiting the banks and card networks.
Network maintenance: Interchange fees support maintaining and operating the card networks. They help cover the costs associated with network infrastructure, fraud prevention measures and other services provided by the networks.
Acquiring costs: Acquiring banks, which facilitate payment processing for businesses, pay the interchange fees as part of their cost structure. The fees help cover the issuing banks’ expenses in processing card transactions and provide an incentive for them to offer card acceptance services.
Interchange fees differ from other fees that businesses may incur, such as merchant service fees, which are charged by acquiring banks or payment processors for handling card transactions on behalf of the business. Some jurisdictions have regulated interchange fees because they can affect businesses’ costs and potentially affect customer prices. Regulations and negotiations between various stakeholders can influence the structure and impact of interchange fees in different regions.
How are interchange fees calculated?
Interchange fees are calculated on the basis of several factors. These fees are set by the card networks – Visa, MasterCard, Discover and American Express – and can vary significantly, depending on:
Type of card: Different types of card have different interchange rates. For instance, rewards cards, business cards and premium cards typically have higher interchange fees compared with those of standard debit or credit cards. Issuing banks often use interchange fees to fund reward programmes.
Transaction method: How the card is processed also affects the interchange fee. For example, card-present transactions, in which customers physically swipe, insert or tap a card at a point-of-sale (POS) terminal, usually have lower fees than card-not-present transactions, such as online or over-the-phone payments. This difference is because of the increased risk of fraud in card-not-present transactions.
Merchant category code (MCC): The type of business or industry also influences the interchange fee. Different types of business have different levels of risk and different average transaction sizes, which are reflected in their MCC.
Size of transaction: Typically, the interchange fee is a percentage of the total transaction amount plus a flat fee. So larger transactions incur larger interchange fees in absolute terms, although they might be smaller as a percentage of the transaction.
Processing details: Certain specifics of how the transaction is processed can also affect the rate. For example, transactions in which the card information is manually keyed in or transactions not settled within a certain time frame might be charged higher rates because of the increased risk of error or fraud.
The formula for calculating interchange fees is complex and varies between card networks, but it typically involves a combination of the factors above. Each card network publishes its own interchange rates twice a year, in April and October. These rates can change, although consumer card interchange fees are capped at 0.2% for debita
How Do Interchange Fees Work ?
Every time your customer pays with a credit or debit card, there’s a behind-the-scenes process that happens in seconds — and interchange fees are baked into every step. While invisible to the buyer, this flow is critical to how money moves from the customer’s bank account to your business bank account.
Here’s a simplified breakdown of how interchange fees work in a typical card transaction:
Purchase Initiated – A customer makes a purchase using a credit or debit card on your website, POS terminal, or mobile app. This request is sent to your payment processor (the acquiring bank or gateway).
Authorization Request – Your processor sends the transaction details to the card network (Visa, Mastercard, etc.), which routes the request to the cardholder’s issuing bank.
Bank Approval – The issuing bank checks the cardholder’s account to verify:
- Available credit or funds
- Fraud concerns
- Card validity
If approved, the authorization is sent back through the network to your processor, then to your business, allowing the sale to go through.
Settlement & Clearing – At the end of the business day, your processor groups approved transactions into a batch and submits them for settlement. The card network routes each transaction to the correct issuing bank.
Interchange Fee Applied – The issuing bank deducts an interchange fee from the total transaction amount and transfers the net amount to the acquiring bank.
Business Receives Funds – You receive the remaining amount in your business bank account, minus:
- Interchange fees (paid to the issuing bank)
- Assessment fees (paid to the card network)
- Processor markup (paid to your payment processor)
Impact on Customers
For customers, the interchange fee is invisible, but it still affects them in several ways. On the positive side, banks use this fee revenue to fund rewards programs, cashback offers, discounts, and EMIs, making credit cards attractive. It also supports fraud protection and transaction security. However, the cost can indirectly come back to customers—merchants may increase product prices or add convenience fees to offset interchange expenses. In some cases, small businesses may even refuse card payments if fees are high, limiting customer choice. If regulators reduce interchange fees, customers may face fewer rewards or perks, as banks cut back on benefits. Thus, while customers don’t pay interchange fees directly, they are impacted through pricing, availability of card acceptance, and the range of benefits offered.
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