
The MCC code is an abbreviation for Merchant Category Code.
It is a 4-digit code used to classify merchants according to their line of business.
Banks generally do not want to issue POS terminals to merchants with certain MCC codes, or to allow transactions through those POS terminals. For this reason, banks check whether the MCC code entered during the merchant application process is prohibited. Merchant applications for businesses defined under a prohibited MCC code are rejected.
The prohibited MCC check is not performed only at the merchant application stage. Transactions made through merchant POS terminals are also checked to see whether the merchant's MCC code is prohibited. Transactions made from merchant POS terminals defined under a prohibited MCC are generally rejected by the acquiring bank with error code 58 - Transaction Not Permitted to Merchant.
Is the prohibited MCC check performed only for merchants?
No. The prohibited MCC check is also performed for credit cards and debit (ATM) cards. In transactions made with a card, the MCC code of the merchant where the transaction takes place is checked by the card-issuing bank during authorization. If the merchant's MCC code is on the prohibited MCC list, the transaction is rejected with error code 57 - Transaction Not Permitted to Card.
How is the MCC code checked during authorization?
When a card transaction is made through a POS terminal, the merchant's MCC code is sent in Field 18 of the ISO 8583 standard. When the authorization request is forwarded from the acquiring bank to the card-issuing bank, the card-issuing bank performs the prohibited MCC checks based on the 4-digit code in Field 18.
Is the prohibited MCC list the same for every bank?
The prohibited MCC list differs from bank to bank. For example, participation banks prevent transactions from their cards at places such as alcohol retailers, tobacco shops, and casinos. Likewise, POS terminals are not connected to such merchants. While some banks are willing to allow transactions from casinos, others prefer to block transactions made at such merchants.
List of prohibited MCC codes
Although the prohibited MCC list varies from bank to bank, the MCC codes listed below are generally classified as prohibited by banks.
| MCC | Description | Business Category |
| 3551 | Mirage Hotel Casino | 06 - LODGING |
| 3555 | Tressure Island Hotel and Casino | 06 - LODGING |
| 3564 | Sam's Town Hotels and Casino | 06 - LODGING |
| 3582 | California Hotel and Casino | 06 - LODGING |
| 3624 | Lady Luck Hotel and Casino | 06 - LODGING |
| 3628 | Excalibur Hotel and Casino | 06 - LODGING |
| 3662 | Circus Circus Hotel and Casino | 06 - LODGING |
| 3667 | Luxor Hotel and Casino | 06 - LODGING |
| 3669 | Eldorado Hotel and Casino | 06 - LODGING |
| 3676 | Monte Carlo Hotel and Casino | 06 - LODGING |
| 3679 | Silver Legacy Hotel and Casino | 06 - LODGING |
| 3682 | Sahara Hotel and Casino | 06 - LODGING |
| 3708 | Virgin River Hotel and Casino | 06 - LODGING |
| 3712 | Buffalo Bill's Hotel and Casino | 06 - LODGING |
| 3728 | Bally's Hotel and Casino | 06 - LODGING |
| 3731 | Harrah's Hotel and Casinos | 06 - LODGING |
| 3737 | Riviera Hotel and Casino | 06 - LODGING |
| 3738 | Tropicana Resort & Casino | 06 - LODGING |
| 3761 | Primadonna Hotel and Casino | 06 - LODGING |
| 3762 | Whiskey Pete's Hotel and Casino | 06 - LODGING |
| 3764 | Beau Rivage Hotel and Casino | 06 - LODGING |
| 3766 | Fremont Hotel and Casino | 06 - LODGING |
| 3767 | Main Street Station Hotel and Casino | 06 - LODGING |
| 3768 | Silver Star Hotel and Casino | 06 - LODGING |
| 3769 | Stratosphere Hotel and Casino | 06 - LODGING |
| 3792 | Claridge Casino Hotel | 06 - LODGING |
| 3794 | Grand Casino Hotels | 06 - LODGING |
| 4829 | Money Transfer - Merchant (According to the BKM bulletin dated 07.11.2017, this MCC can be used for rent payments.) | 00 - OTHER |
| 5813 | Drinking Places (Alcoholic Beverages) - Bars, Taverns, Nightclubs, Cocktail Lounges, and Discotheques | 07 - CASINOS/DRINKING PLACES |
| 5921 | Package Stores - Beer, Wine, and Liquor | 20 - MISCELLANEOUS FOOD STORES |
| 5993 | Cigar Stores and Stands | 20 - MISCELLANEOUS FOOD STORES |
| 6012 | Financial Institutions - Merchandise and Services | 00 - OTHER |
| 6050 | Quasi Cash - Member Financial Institution | 00 - OTHER |
| 6051 | Quasi Cash - Merchant | 00 - OTHER |
| 6211 | Securities Brokers/Dealers | 00 - OTHER |
| 6529 | Remote Stored Value Load - Member Financial Institution | 00 - OTHER |
| 6530 | Remote Stored Value Load - Merchant | 00 - OTHER |
| 6534 | Money Transfer - Member Financial Institution | 00 - OTHER |
| 6535 | Value Purchase - Member Financial Institution | 00 - OTHER |
| 7273 | Dating and Escort Services | 16 - SERVICE PROVIDERS |
| 7800 | National Lottery Authorized Dealer Wholesale | 07 - CASINOS/DRINKING PLACES |
| 7995 | Betting, including Lottery Tickets, Casino Chips, Off-Track, and Racetrack Wagers | 07 - CASINOS/DRINKING PLACES |
| 9950 | Intra-Company Purchases | 00 - OTHER |