A business activity code is declared by you when the business is registered, while the MCC code is assigned by the payment side based on what you actually sell. That is why they regularly diverge: the register may list a broad range while the MCC is a single one matching the real assortment.
The difference
- The activity code is about registration and reporting to the state.
- The MCC is about payments: banks use it for cashback and risk scoring.
- You choose the first yourself; the second is assigned at onboarding after review.
Why it matters
- MCC drives buyer cashback and whether corporate cards work with your store.
- A mismatch between MCC and the real assortment invites questions from payment systems.
- When the assortment changes, the code should be revisited rather than left as is.
What an MCC code is and what it affects is covered separately.
