A merchant category code, or MCC, is a four-digit card-network classification used to describe a merchant’s primary business activity. Acquirers assign it during merchant setup.
Why does the MCC matter?
It can influence interchange, rewards, tax reporting, card acceptance, spending controls and risk monitoring.
How is the code assigned?
The acquirer reviews the merchant’s principal goods or services and selects the applicable scheme code. A business with several activities may need separate setups depending on provider rules.
Can an MCC change?
Yes, if the business model or provider assessment changes. The merchant should request review when the assigned code does not match actual activity.
What problems can an incorrect code cause?
It can produce unexpected fees, blocked corporate-card purchases, inaccurate rewards or compliance questions. Deliberate miscoding can violate network rules.
What should be retained?
Keep the assigned MCC, provider confirmation, effective date, business description and any reclassification history.
