How many business activities (SSIC) can a Singapore company register?

When incorporating a Singapore company, you usually register up to two SSIC codes: one primary activity and, if needed, one secondary activity. The secondary activity is optional.

SSIC is the 5-digit code of the Singapore Standard Industrial Classification and is used by all ACRA-registered companies. Some activity codes are subject to review by other authorities, which may delay registration.

• If you plan to run several businesses: it is best to choose the business with the largest share of revenue as the primary activity.

You can check what to prepare in the Lee Kim Alliance company setup checklist.

As of November 2026, source: ACRA