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Keep your books · Course 3 · Lesson 3 of 7

How long can a Hong Kong company's first financial period be?

  • 1 min read
  • Checked 29 October 2026
In this course · 3 of 7
Otty, the OCTIS octopus

The short answer

A Hong Kong company's first financial period can be up to 18 months. If it is longer than 12 months, the deadline for the accounts is the later of 9 months after the first anniversary of incorporation and 3 months after the period ends (private company, Companies Ordinance (Cap. 622) s.431).

The primary accounting reference date, which closes the first period, must fall within 18 months after the date of incorporation (s.369(6)). The first financial period therefore runs from incorporation up to a maximum of 18 months. If directors specify nothing, the first period ends on the last day of the month of the first anniversary of incorporation.

Deadline for the first set of accounts. For a private company whose first period is longer than 12 months, section 431 gives whichever of these ends later:

  • 9 months after the first anniversary of incorporation; or
  • 3 months after the end of the first accounting reference period.

For a period of 12 months or less, the ordinary deadline applies: 9 months after the year end for most private companies.

Longer first periods spread set-up costs over one audit, but they also mean a larger first set of accounts and a longer wait before you have audited figures. Tax filing dates are separate, so ask your tax adviser how your first period fits them.

Legal basis and sources

The law

  • Companies Ordinance (Cap. 622), ss.369, 431

General information for business owners, not legal, tax or professional advice. Rules change, so check the sources or ask a licensed professional before you act.

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    How long can a Hong Kong company's first financial period be? | OCTIS