Basic information about TIN

  • Local name:

    香港身分證號碼 - HKID number

  • Allocating institutions:

    香港入境事務處 (Immigration Department of Hong Kong)

  • Allocation rules:

    Automatically appointed
    issued for all residents from 11 years of age

Identifier formats

  • A000000(0)

    8 characters (1 letter + 6 digits + 1 control character in bracket), the control character is always the letter A or digit

  • AA000000(0)

    9 characters (2 letters + 6 digits + 1 control character in bracket), the control character is always the letter A or digit

Documents and other resources

  • On the front side of the tax declarations and other documents for the communication with the tax authority.
  • In the lower right corner on the ID card (香 港 身 份 證).

Basic information about TIN

  • Local name:

    商業登記號碼 - Business Registration number

  • Allocating institutions:

    商業登記署 (Business Registration Office of Hong Kong)

  • Allocation rules:

    Automatically appointed

Identifier formats

  • 00000000

    8 digits

Documents and other resources

  • Can be traced in the local business register (Business Register) online.

    The first 8 digits

  • On the front side of the tax declarations and on other documents for the communication with the tax authority.
  • In the middle of the certificate of registration of business (商業登記證), under the heading "Certificate No.".

Legislative grounds for the survey

  • OECD Common Reporting Standard
  • The Convention on Mutual Administrative Assistance in tax matters, as amended by the Protocol of 2010, no. 2/2014 Coll. of international directives
  • The Czech Republic's agreement for avoidance of double taxation in the field of income tax, respectively from income and from assets