Merchant Category Code (MCC)

A four-digit ISO 18245 standard classification code assigned to businesses that categorizes the type of goods or services they provide, used by card networks to determine interchange rates, assess risk, and apply processing rules.

Merchant Category Codes are assigned by acquiring banks during the merchant account application process based on the business's primary products or services. The International Organization for Standardization (ISO) maintains over 500 MCC classifications ranging from retail and restaurants to professional services and utilities. Common examples include 5411 (grocery stores and supermarkets), 5812 (eating places and restaurants), 5999 (miscellaneous and specialty retail stores), and 8011 (doctors and physicians).

MCCs serve multiple functions in payment processing. Card networks use MCCs to determine applicable interchange rates, with certain categories like grocery stores, utilities, and fuel stations often qualifying for lower interchange rates due to their essential nature and lower fraud risk. MCCs also influence chargeback liability rules, fraud monitoring thresholds, and eligibility for specific card programs or restrictions.

Accurate MCC classification is critical because an incorrect code can result in higher interchange rates, disqualification from preferential rate programs, or processing restrictions. Businesses selling different product types may be assigned multiple MCCs or require classification under a blended category. If a merchant's transaction patterns significantly deviate from their assigned MCC, acquirers or card networks may require reclassification or impose restrictions to ensure proper risk management and fee assessment.

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Related Terms

3D Secure

An authentication protocol for online card transactions that adds an additional verification layer between the cardholder and issuing bank, shifting fraud liability from merchants to card issuers when properly implemented.

ACH Payment

Automated Clearing House payment is an electronic bank-to-bank payment method that transfers funds directly between bank accounts through the ACH network, typically used for direct deposits, bill payments, and recurring transactions.

Acquirer

A financial institution that processes credit card payments on behalf of merchants, maintains merchant accounts, and facilitates the settlement of funds from card-issuing banks to merchant bank accounts.

Address Verification Service (AVS)

A fraud prevention tool that compares the numeric portions of a billing address provided during a transaction against the address registered with the card-issuing bank, returning match result codes to help merchants assess transaction risk.

Aggregator

A payment service provider that enables multiple merchants to process card transactions under a single master merchant account rather than each merchant having their own dedicated merchant account, common with services like Square, Stripe, and PayPal.