# Set merchant category codes

Learn about merchant category codes (MCCs) and how to set them for your connected accounts.

[Merchant category codes (MCCs)](https://en.wikipedia.org/wiki/Merchant_category_code) are used to classify businesses by the type of goods or services they provide. For example, the MCC for grocery stores is `5411` and the MCC for bus lines is `4131`. These codes are often used for calculating interchange fees, authorizing payments, and preventing fraud, so it’s important that your connected accounts’ MCCs match their businesses.

Each Stripe account has exactly one MCC. To view the MCC for a connected account, retrieve the `Account` and look at the `configuration.merchant.mcc` property (Accounts v2) or `business_profile.mcc` property (Accounts v1).

Stripe automatically sets MCC codes for connected accounts, but you can choose to set them manually for `Accounts` that your platform controls.

Stripe sometimes flags connected accounts for manual review. If our review determines that an MCC is inaccurate, regardless of whether Stripe or the platform originally set it, we might update it. In that case, we notify you by sending a `v2.core.account[configuration.merchant].updated` webhook event (Accounts v2) or an `account.updated` webhook event (Accounts v1). The platform can’t change the new MCC, and attempting to do so returns an error.

## Set MCCs automatically 

Stripe automatically evaluates connected accounts to determine appropriate MCCs. That means you don’t need to build and maintain any custom logic. Generally, the industry listed in the Stripe Dashboard for the connected account determines its MCC. For connected accounts where Stripe collects updated information for due or changed requirements, or that use [Stripe-hosted onboarding](https://docs.stripe.com/connect/custom/hosted-onboarding.md), the MCC is set during onboarding.

If Stripe can’t determine the MCC using the industry that the connected account provides, we might use information from the connected account’s website. If that also fails, we use the platform’s MCC or Stripe’s default MCC (`5734` Computer Software Stores).

## Set MCCs manually 

You can set a specific MCC when you create or update an `Account` that you control. Stripe must verify that a manually set MCC fits the connected account’s industry, similarly to other identity information. The following examples use the code for Computer Software Stores (`5734`).

#### Accounts v2

```curl
curl -X POST https://api.stripe.com/v2/core/accounts/{{CONNECTEDACCOUNT_ID}} \
  -H "Authorization: Bearer <<YOUR_SECRET_KEY>>" \
  -H "Stripe-Version: 2025-11-17.preview" \
  --json '{
    "configuration": {
        "merchant": {
            "mcc": "5734"
        }
    },
    "include": [
        "configuration.merchant"
    ]
  }'
```

#### Accounts v1

```curl
curl https://api.stripe.com/v1/accounts/{{CONNECTEDACCOUNT_ID}} \
  -u "<<YOUR_SECRET_KEY>>:" \
  -H "Stripe-Account: {{CONNECTEDACCOUNT_ID}}" \
  -d "business_profile[mcc]=5734"
```

## Merchant category code list 

The following is a list of supported MCCs. You must contact Stripe to use a restricted MCC.