Every merchant on earth carries a Merchant Category Code. It quietly sets the interchange rate, whether your card earns rewards, whether the purchase counts as a cash advance — and whether it goes through at all.
Each major airline gets its own MCC — United is 3000, Lufthansa 3010… That's how 'airline credit card' benefits know what you bought, and how corporate travel policies enforce themselves.
Like airlines, big rental brands get dedicated codes. Rental MCCs also trigger the card's collision-damage insurance benefits.
Chain-specific codes; independent hotels use 7011. Hotel MCCs allow incremental authorizations — the rare power to increase a hold after checkout.
Transit gets special small-ticket interchange and tap-to-ride rules — the reason you can board the metro with zero PIN and no receipt.
Uber and Lyft live here. Watch how often 'transport' card offers really mean MCC 4121.
Remittances and P2P top-ups. Many issuers treat 4829 as quasi-cash: no rewards, sometimes cash-advance fees. The card sees you're buying money, not things.
Where your Netflix charge lives — a workhorse of recurring billing rules and network-token adoption.
One of the most politically protected categories: discounted interchange tiers, won through decades of lobbying by high-volume, thin-margin chains. Also the MCC your '5% on groceries' card actually checks.
Not 5411! Corner shops and food trucks often land here — and 'grocery' card rewards quietly don't apply. The eternal cardholder forum complaint.
The store at the gas station. The pump itself is 5542 — two MCCs for one location, different rules at each.
The famous $1 status check: the pump pre-authorizes a token amount (or ~$100–175 hold), then completes for the real total later. The reason for those mystery holds on your statement.
A favorite of fraudsters cashing out stolen cards — high value, easy resale — so risk models watch 5732 baskets closely.
The tip-adjustment MCC: in tip markets, the final clearing amount may legitimately exceed the authorization by ~20% — a tolerance written into network rules.
Higher fraud and dispute profiles than 5812 — some issuers' models price the night out accordingly.
Quick-service: small tickets, no-signature/no-PIN limits, special small-ticket interchange. The MCC in our ISO 8583 artifact.
Eligible for FSA/HSA (flexible spending account / health savings account) cards in the US — the card checks the MCC, plus an item-level standard called IIAS (Inventory Information Approval System), before approving.
High ticket + high resale = elevated fraud screening and, often, higher reserve requirements from acquirers.
One of the classic high-risk MCCs: harder underwriting, rolling reserves, and default declines from some issuers.
Historically the adult-content and psychic-hotline MCC. High-risk underwriting, high chargebacks, and special network registration programs.
Recurring-billing merchants get extra rules: clear cancellation, trial-to-paid disclosures, and (Visa/MC) specific dispute treatment. The negative-option economy lives here.
The catch-all. Acquirers parking a business in 5999 instead of its true category is a compliance problem called MCC miscoding — sometimes accidental, sometimes very much not.
Cash at a bank counter via card — quasi-cash, treated as a cash advance: fees and interest from day one.
The one to know in 2026: most crypto purchases by card land here, and many issuers treat 6051 as a cash advance — instant fees, no grace period, no rewards. Read this MCC before buying bitcoin on a credit card.
High-risk: elevated disputes ('I forgot the subscription' meets 'I'd rather not explain the charge'), special underwriting.
Where most B2B software charges land — a quiet giant of card volume as the world's software went card-billed.
Legal-but-restricted: many issuers block 7995 outright; others allow it regionally. In the US it pairs with special transaction-type flags for legal wagering. The MCC that proves 'approved by the network' ≠ 'approved by your bank.'
Tuition by card: some schools surcharge for it; some card programs exclude 8220 from rewards — a constant points-forum debate.
Discounted interchange in many markets — one of the few feel-good lines in the rate tables. Also a favorite target for card-testing bots, who love small-donation forms.
Governments may pass card costs to you as a 'convenience fee' — one of the places surcharging rules carve out exceptions. Points hackers know 9311 well.