The Hong Kong Profits Tax Return: Which Form You Get and What Goes With It

A Hong Kong company does not choose its profits tax return — the Inland Revenue Department issues one, and which form arrives depends on what kind of company you are. The form number, the attachments required, and the deadline for filing all follow from that first classification. Getting any of these wrong means a penalty, a reassessment, or a return that sits in limbo while the company waits for accounts that should have been started months earlier.

How the Inland Revenue Department assigns your form

Each year the IRD issues profits tax returns to companies. The form you receive is not random — it reflects the company's legal status and how it reports its income.

Corporations incorporated in Hong Kong receive Form BIR51. This is the standard profits tax return for limited companies. It asks for the company's assessable profits for the year, the supporting tax computation, and, for most companies, a copy of the audited financial statements.

Unincorporated businesses — sole proprietorships and partnerships — receive Form BIR52. The structure is similar, but the tax computation and personal assessment options differ because the owners are taxed as individuals rather than at the corporate rate.

What the two-tier profits tax rates mean for your filing

Hong Kong operates a two-tier profits tax system. For corporations, the first HK$2,000,000 of assessable profits is taxed at 8.25%, and profits above that threshold are taxed at 16.5%. For unincorporated businesses, the rates are 7.5% and 15% respectively.

The two-tier system does not change which form you receive, but it does affect the tax computation that accompanies the return.

Audited accounts and the profits tax return

Do audited accounts have to be filed with the return?

Generally, yes. A company that receives a profits tax return is expected to submit it together with its audited financial statements and the relevant tax computation, so the accounts need to be ready on the same timetable as the return. The IRD sets out limited exceptions on its filing requirements page, for example for a dormant company, so check whether one applies before assuming the accounts can be left out.

Where audited financial statements are required, they must be prepared in accordance with applicable accounting standards and audited by a certified public accountant holding a Hong Kong practising certificate.

For a newly incorporated company, the first profits tax return may cover a period longer than twelve months. Where audited accounts are required, they should generally cover the full period shown on the return, subject to the exceptions on the IRD filing requirements page.

What is the difference between the returns issued to different companies?

The core difference is the entity type and the tax treatment that follows from it.

Form BIR51 (corporations) is filed at the corporate profits tax rate and generally requires audited financial statements.

Form BIR52 (unincorporated businesses) carries lower tax rates (7.5% / 15% versus 8.25% / 16.5%).

A dormant company is, for this purpose, a private company that has passed a special resolution under section 5 of the Companies Ordinance (Cap. 622) declaring it dormant and has delivered that resolution to the Companies Registry; the exemption from preparing audited accounts applies only once the resolution has been delivered. The IRD's published FAQ says it accepts a profits tax return filed by such a company without the audited financial statements, but a return that has been issued should still be completed and filed, not ignored.

When the return arrives before the accounts are ready

What happens if the return arrives and the accounts are not ready?

The better approach is to start the accounting and audit process well before the return arrives. A company that begins its accounts work only after receiving the profits tax return is already behind. Bank reconciliations, expense documentation, related-party transaction support, and inventory or revenue cut-off procedures all take time, and rushing them produces accounts that the auditor will query — which creates further delay.

Preparing for the profits tax return before it arrives

A company that waits for the IRD to issue its return before organising its affairs is reacting, not planning. The following steps should happen in the ordinary course of business, not as a scramble when the brown envelope arrives.

Keep records from the first transaction. Bank statements, invoices, contracts, expense receipts, payroll records, and shareholder transaction documents should be filed continuously. A company that dumps twelve months of bank statements on its accountant two weeks before the filing deadline is creating the delay it will later ask the IRD to excuse.

Reconcile related-party transactions. If the Hong Kong company transacts with related entities in mainland China, the United States or elsewhere — management fees, purchases, loans, profit allocations — the commercial basis and pricing support should be documented as the transactions occur. Retroactive documentation is less convincing to the IRD and more likely to be questioned during a profits tax audit.

Confirm the accounting period and any changes. A change in the financial year-end, a cessation of business, or a commencement of new activities may affect which period the profits tax return covers and how the tax computation is prepared. These should be flagged early, not discovered when the return arrives.

Engage the auditor before the year-end. An audit that begins after the financial year has closed will always take longer than one planned in advance. Preliminary audit work — confirming balances, reviewing significant transactions, and identifying areas that require additional evidence — can start before the year-end.

Filing the return

The profits tax return should be filed together with the audited financial statements, except in the cases the IRD lists on its filing requirements page.

This article is for general reference only and does not constitute tax advice. Hong Kong profits tax rules, rates, deadlines and filing requirements may change. For advice on a specific situation, consult a qualified tax professional familiar with Hong Kong tax law.

Kenneth Tax Advisory (kjetax.com) has served over 10,000 businesses since 2018. Our team of 150+ professionals, led by partners with more than 20 years of cross-border tax experience, supports clients across mainland China, Hong Kong and the United States.