If you’re setting up a business in Hong Kong, you will likely come across two important identifiers: the Company Registration Number (CRN) and the Business Registration Number (BRN).
The distinction between the two may seem subtle, but it plays a crucial role in legal compliance, tax reporting, and business operations. This guide breaks down the CRN vs BRN in Hong Kong, explaining their purposes, legal foundations, and how they apply in real-world scenarios.
Whether researching the difference between CRN and BRN in Hong Kong or going through the Hong Kong company formation process, understanding both numbers is essential for proper compliance and documentation.
The Company Registration Number (CRN) is issued by the Companies Registry Hong Kong upon successful incorporation of a limited company. It serves as the company’s legal identifier and appears on the Certificate of Incorporation. The CRN is used mainly for filings with the Companies Registry and legal formalities.
The Business Registration Number (BRN) is issued by the Hong Kong Inland Revenue Department (IRD) through the Business Registration Office Hong Kong. It is listed on the Business Registration Certificate and serves as the key reference for tax, banking, and general business operations.
While incorporated companies receive both CRN and BRN, sole proprietors and partnerships receive only the BRN.
Understanding how these identifiers differ is critical for meeting Hong Kong company compliance requirements and avoiding administrative errors.
| Feature | Company Registration Number (CRN) | Business Registration Number (BRN) |
|---|---|---|
| Issuing Body | Companies Registry | Inland Revenue Department (IRD) |
| Purpose | Legal identification | Tax and business regulation |
| Applies to | Incorporated companies only | All business types |
| Appears on | Certificate of Incorporation | Business Registration Certificate |
| Renewal Required | No | Yes (annually or every 3 years) |
The CRN is used for company filings, while the BRN is the go-to number for tax reporting, bank documents, invoicing, and more.
The CRN is governed by the Companies Ordinance (Cap. 622), while the BRN falls under the Business Registration Ordinance (Cap. 310).
In a significant regulatory update, Hong Kong introduced the Unique Business Identifier (UBI) regime on 27 December 2023. Under this system, the BRN is the sole UBI number in Hong Kong for all government filings, replacing the CRN in most external identification contexts.
If you’re starting a company, you’ll automatically receive both numbers during the company formation process in Hong Kong:
For Incorporated Companies:
For Sole Proprietors / Partnerships:
Documents Required:
Unlike the CRN, which never expires, the BRN must be renewed either:
The IRD sends renewal notices in advance. Penalties for non-renewal include:
You must report changes in your business particulars (e.g. address or business nature) to the IRD within 1 month.
Using the correct number at the right time helps avoid delays, rejection of forms, or regulatory non-compliance.
CRN is typically used for:
BRN is required for:
Understanding the distinction between CRN and BRN in Hong Kong is essential for staying compliant, avoiding administrative errors, and streamlining your business operations. With the introduction of the UBI number in Hong Kong, using the correct identifier in filings, contracts, and tax submissions is more important than ever.
Whether you’re a founder, consultant, or finance lead, having clarity on your business identifiers is critical for smooth daily operations and long-term growth.
Need help navigating business registration or incorporation in Hong Kong? Contact Ascentium's corporate services team for expert guidance and end-to-end support tailored to your business structure.