A Merchant Category Code (MCC) is a standard four-digit number assigned to a business by credit card networks (like Visa and Mastercard) to classify the specific type of goods or services the business provides. For example, MCC 5411 represents Grocery Stores, while MCC 7995 represents Betting/Casino Gambling.
Why are MCCs Crucial in Payments?
MCCs act as the foundation for how a merchant is treated within the payment ecosystem. They directly influence:
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Interchange Fees: Different business categories are subject to different baseline transaction fees.
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Risk Classification: Acquirers use MCCs to determine if a merchant is low-risk or high-risk. High-risk MCCs (like adult entertainment or travel) are prone to higher chargeback rates.
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Prohibited Categories: Acquiring banks have restricted lists; certain MCCs may be entirely blocked based on the acquirer's risk appetite or card network rules (like BRAM).
The Danger of MCC Misclassification
Sometimes merchants intentionally misclassify their business under a lower-risk MCC to bypass strict underwriting, get lower fees, or commit transaction laundering. Accurate website scanning and entity correlation are required to ensure the MCC matches the actual business operations.
Managing MCC Risk with Onlayer
Onlayer enables you to tailor your onboarding logic directly to acquirer-specific rules and MCC risk levels. By automatically categorizing merchants and mapping their operational behavior across the web, Onlayer ensures accurate classification and flags unauthorized brand usage or hidden high-risk activities instantly.
