How does an MCC work?
The code is set on the merchant account and travels in every authorization. Stripe’s documentation describes MCCs as classifying businesses by the type of goods or services they provide, gives 5411 for grocery stores and 4131 for bus lines as examples, and notes that the codes are used for calculating interchange fees, authorizing payments and preventing fraud. Payment method providers also use them: Stripe’s OXXO documentation lists codes that are prohibited or restricted for that method.
Why does the MCC matter for approval rate?
Issuers apply rules by category. A code that signals higher risk can be blocked on some cards, restricted on credit cards or declined cross-border. As an illustrative example: if 15% of the cards in a market belong to issuers that block a category outright, card approval for that category cannot rise above about 85% there, however the payments are routed. The remaining customers need a method that the issuer’s category rules do not touch.
What are the risks of getting the MCC wrong?
Processing under a code that does not match the business breaks scheme rules, hides the payment from controls issuers are required to apply, and can end the acquiring relationship.
Where does Omno use it?
MCCs are assigned by the acquirers and PSPs Omno connects to. Omno’s PSP eligibility rules send each merchant’s traffic only to providers set up for its category in the right countries, and the hosted checkout can offer local methods where cards in a category decline.