--- title: Hong Kong Company Bookkeeping, Audit & Tax Filing Guide description: Hong Kong company bookkeeping, financial statements, statutory audit and BIR51 filing explained, including record retention, extensions and dormant-company treatment. --- [![Asomerit Consulting](https://asomerit.com/hubfs/Asomerit%20Logo/Asomerit%20Consulting%20Logo.png)](https://asomerit.com/) China Services ### Setup - [WFOE Registration](https://asomerit.com/wfoe-registration) - [Registered Address](https://asomerit.com/wfoe-registration) - [Bank Account Opening](https://asomerit.com/china-bank-account-opening) ### Operate - [Bookkeeping & Tax](https://asomerit.com/bookkeeping) - [Annual Compliance](https://asomerit.com/bookkeeping) - [Hiring Support](https://asomerit.com/china-hiring-support) - [Payroll & Social Insurance](https://asomerit.com/china-hiring-support) - [Work Visa](https://asomerit.com/china-work-visa) - [Export Tax Rebate](https://asomerit.com/china-import-export-tax-rebate) ### Documents & Licences - [NCR Certificate](https://asomerit.com/china-no-criminal-record-certificate) - [Document Authentication](https://asomerit.com/china-document-authentication-apostille) - [Import & Export License](https://asomerit.com/import-export-license-application) - [Food Operation License](https://asomerit.com/food-operation-license-application) ### Change & Exit - [Company Change](https://asomerit.com/china-company-change) - [Company Deregistration](https://asomerit.com/china-company-deregistration) Hong Kong - [Hong Kong Incorporation](https://asomerit.com/hong-kong-incorporation) - [Hong Kong Bank Account Opening](https://asomerit.com/hong-kong-bank-account-opening) - [Hong Kong Accounting & PTR](https://asomerit.com/hong-kong-accounting-tax) - [Hong Kong Company Secretary](https://asomerit.com/hong-kong-company-secretary) [About](https://asomerit.com/about-us-asomerit-consulting) Resources - [Blog](https://asomerit.com/blog) - [Tools](https://asomerit.com/tools) - [Downloads](https://asomerit.com/downloads) [Contact](https://asomerit.com/contact) [Get a quote](https://asomerit.com/contact) China Services #### Setup [WFOE Registration](https://asomerit.com/wfoe-registration) [Registered Address](https://asomerit.com/wfoe-registration) [Bank Account Opening](https://asomerit.com/china-bank-account-opening) #### Operate [Bookkeeping & Tax](https://asomerit.com/bookkeeping) [Annual Compliance](https://asomerit.com/bookkeeping) [Hiring Support](https://asomerit.com/china-hiring-support) [Payroll & Social Insurance](https://asomerit.com/china-hiring-support) [Work Visa](https://asomerit.com/china-work-visa) [Export Tax Rebate](https://asomerit.com/china-import-export-tax-rebate) #### Documents & Licences [NCR Certificate](https://asomerit.com/china-no-criminal-record-certificate) [Document Authentication](https://asomerit.com/china-document-authentication-apostille) [Import & Export License](https://asomerit.com/import-export-license-application) [Food Operation License](https://asomerit.com/food-operation-license-application) #### Change & Exit [Company Change](https://asomerit.com/china-company-change) [Company Deregistration](https://asomerit.com/china-company-deregistration) Hong Kong [HK Incorporation](https://asomerit.com/hong-kong-incorporation) [HK Bank Account Opening](https://asomerit.com/hong-kong-bank-account-opening) [HK Accounting & PTR](https://asomerit.com/hong-kong-accounting-tax) [Hong Kong Company Secretary](https://asomerit.com/hong-kong-company-secretary) [About](https://asomerit.com/about-us-asomerit-consulting) Resources [Blog](https://asomerit.com/blog) [Tools](https://asomerit.com/tools) [Downloads](https://asomerit.com/downloads) [Contact](https://asomerit.com/contact) [Get a quote →](https://asomerit.com/contact) **Ex-government** corporate experts Trusted by **800+** international clients **Replies in a few hours,** every weekday [★★★★★ **Excellent** on Trustpilot](https://www.trustpilot.com/review/asomerit.com) # Hong Kong Company Bookkeeping, Audit and Profits Tax Filing: Annual Requirements ![Tommy Zhang](https://asomerit.com/hubfs/%E6%9C%AA%E6%A0%87%E9%A2%98-1-2.jpg) [Tommy Zhang September 30, 2026](https://asomerit.com/blog/author/tommy-zhang) - [Finance and Taxation](https://asomerit.com/blog/tag/finance-and-taxation) - 6 mins A Hong Kong company has separate obligations for accounting records, financial statements, audit where applicable, and BIR51 filing when the return is issued. This guide sets out how the four connect, where the main exception applies and how the filing deadline is fixed. ## Key takeaways - A Hong Kong company must keep the accounting records the Companies Ordinance requires. The Ordinance's retention rule and the Inland Revenue tax-record rule are separate and use different triggers. - Directors must prepare financial statements for each financial year in accordance with the Companies Ordinance. - A reporting exemption does not by itself remove the audit requirement; the exception the Companies Registry states is a company dormant under section 447. - BIR51 is the Profits Tax Return for corporations. It is due within one month of its issue date unless an applicable extension applies. - Annual accounts and audit work should not wait for the return to be issued. Where returns are not lodged by the extended due date, IRD states that estimated assessments will be issued or penalty proceedings instituted. ## Four Separate Obligations Make Up the Annual Compliance Cycle A Hong Kong company's annual compliance involves four obligations. Completing one does not discharge another. | Obligation | What it covers | When it applies | | --- | --- | --- | | Accounting records | Records the Companies Ordinance requires the company to keep | Throughout the year | | Financial statements | Formal financial reporting prepared by the directors | Each financial year | | Statutory audit | Audit of the financial statements | Required unless the company is dormant under section 447 | | BIR51 | Profits Tax Return for corporations | When the Inland Revenue Department (IRD) issues the return | Keeping accounting records does not replace the annual financial statements. Preparing the financial statements does not complete the audit, and filing BIR51 is a separate tax step. A company not yet incorporated starts with the incorporation process, covered under Asomerit's [Hong Kong incorporation service](https://asomerit.com/hong-kong-incorporation). ## Accounting Records Fall Under Two Separate Retention Rules A Hong Kong company must keep the accounting records required by the Companies Ordinance. The Ordinance also requires the relevant accounting records, accounts and returns to be preserved for seven years after the end of the financial year to which the last entry or recorded matter relates. The Inland Revenue Ordinance imposes a separate duty. As IRD's BIR51 notes describe it, each person carrying on a trade, profession or business in Hong Kong must keep sufficient records of income and expenditure, and of assets and liabilities, to enable assessable profits to be readily ascertained. IRD states that these records should be retained for at least seven years after the transactions to which they relate, or until the corporation is dissolved if that is sooner. | Rule | What it concerns | Retention period | | --- | --- | --- | | Companies Ordinance | Relevant accounting records, accounts and returns | Seven years after the end of the financial year to which the last entry or recorded matter relates | | Inland Revenue | Records sufficient for assessable profits to be readily ascertained | At least seven years after the relevant transactions, or until dissolution if sooner | The two periods start from different points. A company should apply each rule to the records it covers rather than rely on a single seven-year rule for every document. ## Directors Must Prepare Financial Statements for Each Financial Year Financial statements are the formal annual report prepared from the accounting records. The Companies Registry states that a company's directors must prepare financial statements for each financial year that comply with the relevant Companies Ordinance requirements. If the company is a holding company, the financial statements must be consolidated financial statements, subject to the exceptions set out in the Ordinance. Whether a particular holding company falls within an exception depends on the statutory conditions and its ownership structure. ## A Reporting Exemption Does Not Remove the Audit Requirement Some companies qualify for simplified reporting under the Companies Ordinance. That exemption does not by itself remove the audit requirement. The Companies Registry states that audit of financial statements is required for all companies, including those falling within the reporting exemption, except companies dormant under section 447. Reporting exemption is not audit exemption. A company that is small, or that qualifies for simplified reporting, should not assume that no audit is required. ### Dormant is a statutory status Under section 447, the financial-statement and audit requirements do not apply to a company that is dormant. Dormant is a statutory status with conditions. It is not the same as being inactive, small or low-revenue. Before relying on dormant-company treatment, a company should confirm that it satisfies the applicable statutory conditions. ## The BIR51 Deadline Runs From the Issue Date on the Return BIR51 is IRD's Profits Tax Return for corporations. The return states that it must be completed and submitted, together with any required supplementary forms, within one month from its date of issue. Unless an applicable extension applies, the deadline is therefore set by the issue date printed on the return the company receives. ### Block Extension Scheme IRD operates a Block Extension Scheme for Profits Tax Returns. From April 2026, tax representatives must submit block extension applications or notifications for their clients electronically, through the online block extension service on the Tax Representative Portal. An extension under the scheme is subject to its requirements and deadlines and is not automatic. ### Voluntary e-filing extension IRD grants a further one-month extension on application where the taxpayer or its service provider voluntarily e-files the Profits Tax Return, subject to the applicable process. | Extension route | How it works | Boundary | | --- | --- | --- | | Block Extension Scheme | Application or notification by a tax representative through the Tax Representative Portal | Subject to the scheme's requirements and deadlines; not automatic | | Voluntary e-filing | Further one-month extension on application | Filing method and eligibility must be confirmed | A company should confirm that an extension route applies to its return before planning around the additional time. ## Accounts and Audit Work Should Start Before the Return Arrives As of 30 September 2026, IRD's FAQ on BIR51 and BIR52 returns issued on or after 1 April 2026 advises taxpayers not to wait for the issue of Profits Tax Returns before preparing annual audited accounts. Bookkeeping, financial statements and audit work should therefore run on the company's financial-year cycle rather than start when BIR51 arrives. In a circular letter, IRD states that where returns are not lodged by the extended due date, estimated assessments will be issued or penalty proceedings instituted. The circular asks tax representatives to remind clients that failing to file returns, or not filing them on time, without reasonable excuse exposes them to the risk of action under section 80 or 82A of the Inland Revenue Ordinance. ## Annual Accounting and Tax Checklist for a Hong Kong Company 1. Keep the accounting records the Companies Ordinance requires, and keep them current throughout the year. 2. Have the directors prepare the financial statements for the financial year. 3. Confirm the audit treatment. A reporting exemption does not remove the audit requirement, and dormant-company treatment depends on the statutory conditions. 4. Start the accounts and audit work without waiting for BIR51 to be issued. 5. When BIR51 arrives, note the issue date. The return is due within one month of that date unless an applicable extension applies. 6. Before relying on additional time, confirm that the Block Extension Scheme or the voluntary e-filing extension applies to the return. ## When Professional Support Is Useful Professional support is useful where accounting records are incomplete, dormant-company treatment needs to be assessed, or BIR51 has arrived and the accounts, audit and filing must be coordinated together. Asomerit coordinates bookkeeping, financial-statement preparation, audit preparation and communication with a Hong Kong CPA or auditor, together with Profits Tax filing support. The statutory audit itself is performed by the Hong Kong CPA or auditor. For the annual accounting and tax cycle, see Asomerit's [Hong Kong accounting and tax service](https://asomerit.com/hong-kong-accounting-tax). Company secretary and statutory maintenance matters follow a separate route through Asomerit's [Hong Kong company secretary service](https://asomerit.com/hong-kong-company-secretary). ## Sources and Currentness Last verified: 30 September 2026. - Companies Registry: Companies Ordinance (Cap. 622), Part 9 (Accounts and Audit); Accounts and Audit guidance; FAQ on Accounts and Audit. - Inland Revenue Department: BIR51 Notes and Instructions; Profits Tax Return – Corporations (BIR51); Completion of Profits Tax Returns and Supplementary Forms; Block Extension Scheme; Electronic filing of Profits Tax returns; Circular Letter on failure to lodge returns by the due date or the extended due date; FAQ on BIR51 and BIR52 returns issued on or after 1 April 2026. ![Tommy Zhang](https://asomerit.com/hubfs/%E6%9C%AA%E6%A0%87%E9%A2%98-1-2.jpg) ### Tommy Zhang Practical China business guidance from Asomerit’s bilingual corporate services team. 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