Hong Kong Business Tax Portal (BTP): frequently asked questions

What is Hong Kong's Business Tax Portal?

The Business Tax Portal (BTP) is an online platform launched by Hong Kong's Inland Revenue Department (IRD) for electronic tax and business filing. It replaces paper-based processes and introduces a structured, tiered access model that applies to all registered businesses in Hong Kong.

Who can be the Responsible Person for a BTP Business Account?

The Responsible Person (RP) must be a natural person holding one of the IRD's specified roles. For a Hong Kong company, this can be a director, an individual company secretary, a liquidator or provisional liquidator, or an authorised representative for a non-Hong Kong company. A corporate company secretary can also act as RP, provided that a natural person director of that entity completes the registration.

What is the difference between a BTP Responsible Person, Administrator and Authorised User?

The BTP operates on three tiers. The Responsible Person opens the initial Business Account and appoints Administrators. Each account can have a maximum of five Administrators. Administrators have full access to the account's services and appoint Authorised Users, who only access what the Administrator grants them. There is no cap on the number of Authorised Users.

Can one person register multiple Hong Kong entities on the BTP?

Yes. A common director or company secretary can register up to 500 Business Accounts in a single bulk upload. This is useful for groups with large Hong Kong entity populations but also means that one person's registration decisions apply across a significant number of entities.

What happens if all BTP Administrators leave the business?

If every Administrator leaves or can no longer serve, the Responsible Person must use the IRD's reappointment function to name new Administrators. Until that process is approved, the account is effectively suspended. This is one of the most significant operational risks for groups that have not built continuity into their BTP governance model.

What happens if the Responsible Person is a director who leaves the company?

If the RP is a departing director, the group faces a genuine access gap. New RP registration may be required, and filings cannot proceed smoothly until the account is back under active control. This is why many multinational groups are reviewing who holds the RP role and whether a more stable arrangement is appropriate.

Why are multinational groups treating BTP as a governance issue, not just a filing one?

For groups with many Hong Kong entities, BTP introduces structural questions about continuity, access control and accountability. Staff turnover, director rotations and acquisitions can all disrupt BTP access if the underlying governance model has not been designed to withstand them. Tax, finance, legal and company secretarial teams often need to work through these questions together.

What are the advantages of appointing a professional company secretary as BTP Responsible Person?

Appointing a professional company secretary as RP can provide continuity when directors change, a single point of oversight across a group's BTP accounts, a consistent process for onboarding new entities, reduced dependency on individual employees, and clearer control over who is added as Administrator or Authorised User.

How can Law Debenture help with BTP governance?

Law Debenture acts as company secretary for a number of Hong Kong entities. We help clients assess who should hold the Responsible Person role, structure Administrator and Authorised User access, coordinate bulk onboarding across entity populations, and ensure continuity when personnel change. If you would like to review your group's BTP arrangements, please get in touch.

To find out more about our solutions for those doing business in Hong Kong do contact marc.comack-bissett@lawdeb.com