Hong Kong Profits Tax in 2026: A Filing Evidence Guide

Build the filing file from the Inland Revenue Department notice, current instructions, company records, and a review log. Keep the figures, election, supporting documents, and submission receipt connected. Your finance team then has a traceable pack for professional review without relying on a generic calendar or an unsupported tax-saving claim.

Build the return pack from the current IRD notice

Record the year of assessment, file number, issue date, and due date from the notice received by the company. Use that notice as the schedule source. The IRD’s current profits tax return page identifies BIR51 as the return for corporations, BIR52 for persons other than corporations, and BIR54 for non-resident persons.

The 2025/26 IRD filing tips tell filers to follow the Notes and Instructions and provide the schedules and supporting documents specified there. For a corporation, start a checklist with these fields:

Record	Question for the file
IRD notice	Which return, year of assessment, and date apply?
Accounts	Which signed financial statements support the return?
Tax computation	Who prepared it, from which accounts, and on which date?
Adjustments	Which source and company record support each adjustment?
Elections	Which entity made each election, and for which year?
Supplementary forms	Which forms do the current instructions call for?
Submission	Who signed or submitted the return, and where is the receipt?

Assign one owner to each missing item. Keep open questions separate from confirmed figures so the reviewer can see where the file still depends on a decision.

Separate accounting figures from assessable profits

The IRD’s Profits Tax page describes the scope of the charge and presents rates against assessable profits. Use the accounts as an input to the tax computation. Ask the preparer to show each step from the accounting result to the assessable profit or adjusted loss reported on the return.

For each adjustment, record:

• the account and amount;
• the treatment used in the computation;
• the official source or professional analysis supporting that treatment;
• the company document that supports the underlying fact;
• the person responsible for resolving any open point.

This guide does not decide whether a receipt has a Hong Kong source, qualifies for a deduction, or falls within a concession. Those questions depend on facts outside a headline rate table. Send them to a qualified adviser with the evidence attached.

Check the rate and connected-entity election

The IRD lists these two-tiered rates for the year of assessment 2018/19 onward:

Entity	First HK$2 million of assessable profits	Portion above HK$2 million
Corporation	8.25%	16.5%
Unincorporated business	7.5%	15%

The table does not establish that an entity qualifies for the lower tier. The IRD’s two-tiered rates FAQ says that, where an entity has connected entities, the two-tiered rates apply to the nominated entity for the relevant year. The FAQ also says the election cannot change for that year after the entity makes it.

For a group file, record the nominated entity, year of assessment, approving person, and return field that carries the election. Ask the adviser to resolve any uncertainty about connected-entity status before submission. Do not choose an entity from a tax-saving example alone.

Prepare the filing files and preserve the receipt

Use the filing route that applies to the company and year. The IRD’s electronic filing guide covers returns from 2022/23 through 2025/26 and divides the process into upload, completion, and submission services. Check the current page before preparing files because the covered years and technical instructions can change.

The same IRD guide tells filers to prepare the required supplementary forms, financial statements, tax computation, and supporting schedules for upload. It advises the filer to save or print the acknowledgement after submission. Store that acknowledgement with the final return, submitted files, sign-off, and any later correction notice.

The 2025/26 paper filing tips also address the practising certificate number for the CPA (practising) who signed an auditor’s report filed with BIR51 and the form of audited financial statements submitted with the return. Check the current Notes and Instructions against the company’s filing method instead of copying a prior-year pack.

Common questions

Which profits tax return does a Hong Kong corporation use?

The IRD’s profits tax return page identifies BIR51 as the return for corporations. Use the return and Notes and Instructions issued for the company’s year of assessment.

What are the two-tiered profits tax rates for a corporation?

The IRD lists 8.25% on the first HK$2 million of assessable profits and 16.5% on the portion above HK$2 million for corporations under the two-tiered regime.

Can two connected entities use the two-tiered rates for the same year?

No. The IRD’s two-tiered rates FAQ says the rates apply to the connected entity nominated for the relevant year and explains the election rules.

Which documents should support a corporation’s return?

The current IRD filing tips direct filers to the Notes and Instructions for the specified schedules and supporting documents. The page also describes filing audited financial statements and the practising certificate information for an auditor’s report submitted with BIR51.

Which deadline should the finance team use?

Use the date on the company’s IRD notice and any extension that applies to that exact filing. Keep the notice or extension record in the return pack. A generic online calendar cannot establish the company’s due date.