The short answer
An MCC code (Merchant Category Code) is a four-digit number that classifies a business by the kind of goods or services it sells. ISO 18245 defines the standard. Visa, Mastercard, Discover, and American Express each maintain their own MCC list (largely overlapping). When an acquirer boards a merchant account, they assign one MCC to that MID based on the merchant's declared business. The MCC is transmitted on every authorization and affects interchange rates, card-issuer reward-category mapping, surcharge rules, and card-network compliance program scope.
A few examples
- 5411: Grocery Stores, Supermarkets
- 5499: Miscellaneous Food Stores — Convenience Stores, Markets, Specialty Stores
- 5912: Drug Stores, Pharmacies
- 5967: Direct Marketing — Inbound Teleservices
- 5969: Direct Marketing — Other Direct Marketers (Not Elsewhere Classified) — flagged elevated-risk
- 5993: Cigar Stores and Stands
- 7273: Dating Services
- 7995: Betting (including Lottery Tickets, Casino Gaming Chips) — high-risk
- 5967 / 7995: flagged under Visa GBPP (Global Brand Protection Program) with higher scrutiny
What operators need to know
- MCC drives interchange. Visa's CPS (Custom Payment Service) rate programs assign different interchange categories by MCC. MCC 5411 (grocery) gets one of the lowest interchange bands. MCC 5499 (convenience / specialty food) gets a higher band. Miscategorization can cost 40–120 bps over time.
- Misdeclaration = termination. Declaring MCC 5499 (food) when you sell peptides (which Visa/MC consider MCC 5969 or outside the consumer card brand network entirely) is cause for immediate acquirer termination and potential MATCH list placement. The MATCH list effectively blacklists you from getting a merchant account anywhere for 5 years.
- MCC change requires re-underwriting. If your business mix shifts (added a new vertical), you request an MCC update. Acquirer re-reviews underwriting; may reset reserve or chargeback-ratio calibration.
- Card issuers use MCC for reward-category multipliers. Amex Gold earns 4x on MCC 5411/5812/5813 (groceries and restaurants). Chase Sapphire Preferred earns 3x on MCC 5812/5814 (restaurants + takeout). Your MCC determines how attractive your charges are to the customer's points balance.
- Dynamic MCC is rare and tightly controlled. Some aggregators (DoorDash, Uber) have approval for dynamic MCC per transaction context (food delivery vs. transportation). This is not available to normal merchants.
MCC vs. the restricted-business list
The PayFac restricted-business list (Stripe's, Square's, PayPal's) is operational, not regulatory. Some restricted-business categories do map to specific MCCs (MCC 5912 partial for pharmaceuticals, MCC 5993 for tobacco, MCC 7995 for gambling), but the PayFacs restrict more liberally than MCC coding alone requires. A dedicated merchant account at a vertical-specialized acquirer can board you at the correct MCC for your actual business, even when PayFacs refuse.
How multiflow handles MCC
During onboarding we coordinate the MCC declaration with the acquirer based on your actual business mix. For multi-vertical portfolios (e.g., a peptide brand + a CBD brand + a supplement brand), we structure separate MIDs under the same parent umbrella so each MID carries the correct MCC rather than forcing one catch-all categorization. See our industry pages for vertical-specific placement logic.