Hong Kong Profits Tax: Rates, Returns and Compliance Obligations for Corporations

Hong Kong Profits Tax Rates, Returns and Compliance

Hong Kong charges profits tax under a two-tiered progressive structure. For corporations, the rate is 8.25% on the first HK$2,000,000 of assessable profits. The rate rises to 16.5% on any amount above that threshold. Unincorporated businesses pay 7.5% on the first HK$2,000,000 and 15% on the remainder.

Only one entity in a group of connected entities may elect the two-tiered rates. The others are charged at the upper rate on all their profits. The Inland Revenue Department (IRD) defines a connected entity by reference to common control or significant influence. The election is made on the profits tax return itself.

Hong Kong Profits Tax Return Filing

The IRD issues profits tax returns annually to businesses on its assessable list. The form depends on legal structure:

• Form BIR51 - for corporations
• Form BIR52 - for persons other than corporations (partnerships, sole proprietors)
• Form BIR54 - for non-resident persons

Each return is accompanied by supplementary forms, labelled S1 to S18. These collect tax computations, financial statements, and details of connected transactions. The specific supplementary forms required depend on the size and nature of the business.

A newly incorporated company receives its first profits tax return 18 months after incorporation. The return must be filed within one month of the issue date. The only exception is where a tax representative has been appointed and a block extension applies.

Two-Tiered Profits Tax Rates Hong Kong and the Connected Entity Rule

The two-tiered rates are a concession, not an entitlement. The connected entity rule prevents a group from splitting its business across multiple entities to claim the lower rate more than once. If you control two or more entities, only one may use the two-tiered rates in a given year of assessment. The others must compute their assessable profits entirely at the upper rate.

Complete the relevant section of the profits tax return to make the election. There is no separate form. The IRD may request information about connected entities to verify the election.

Hong Kong Profits Tax Due Date

The due date for filing a profits tax return is one month from the date of issue. Where a tax representative is appointed, the IRD publishes a block extension letter each year setting later filing dates based on the taxpayer's accounting date:

The block extension applies automatically if the tax representative is registered on the Tax Representative Portal. No extension means the original one-month deadline stands.

Provisional tax is payable in two instalments. The first instalment is due by the same date as the profits tax return. The second instalment is due approximately three months later. Apply to hold over provisional tax if the estimated assessable profits for the current year are lower than the previous year's figure.

Hong Kong Profits Tax Computation

Start with the accounting profit before tax. Adjust for items that are not deductible or not chargeable under the Inland Revenue Ordinance (Cap. 622). The key adjustments:

• Add back non-deductible expenses: domestic or private expenditure, capital expenditure, and fines
• Deduct allowable items: depreciation allowances, interest on borrowings used to produce chargeable profits, and certain pre-trading expenses
• Apply the territorial source principle: only profits arising in or derived from Hong Kong are chargeable

The IRD's guidance on the locality of profits is set out in Departmental Interpretation and Practice Note 21 (DIPN 21). Profits sourced outside Hong Kong are not chargeable, whatever the residence of the taxpayer. An offshore claim must be supported by evidence of where the profit-generating activities took place.

The basis period for a year of assessment is normally the accounting year ending in that year. For a newly incorporated company, the first basis period may be longer than 12 months.

Provisional Tax and Holdover

Hong Kong operates a provisional tax system. The IRD assesses provisional profits tax for the current year based on the assessable profits of the preceding year. The taxpayer pays this amount in two instalments. The final tax liability is reconciled when the return for the current year is filed.

Apply to hold over all or part of the provisional tax if:

• The assessable profits for the current year are expected to be less than the preceding year's figure
• The business has ceased or will cease before the end of the year
• The taxpayer has elected to be assessed on a different basis period

The holdover application must be made in writing to the IRD before the due date of the first instalment. There is no prescribed form. The IRD provides a sample letter on its website.

Electronic Filing and iXBRL

Filing is available through the Business Tax Portal and the Tax Representative Portal. Mandatory electronic filing began on 1 April 2026 for relevant entities of in-scope multinational enterprise groups, from the year of assessment 2025-26. The threshold follows the OECD Pillar Two rule of consolidated revenue of EUR 750 million or more.

Electronic filers tag financial statements and tax computations in iXBRL. The IRD provides preparation tools and a validation service. The Department has stated an intention to reach full electronic filing by 2030.

Supplementary Forms and Additional Requirements

The supplementary forms S1 to S18 cover:

• S1 - Tax computation
• S2 - Balance sheet and profit and loss account
• S3 - Details of connected transactions
• S4 - Details of offshore claims
• S5 - Details of depreciation allowances
• S6 - Details of losses
• S7 - Details of interest income
• S8 - Details of dividend income
• S9 - Details of rental income
• S10 - Details of royalties
• S11 - Details of management fees
• S12 - Details of service fees
• S13 - Details of commission income
• S14 - Details of other income
• S15 - Details of capital expenditure
• S16 - Details of research and development expenditure
• S17 - Details of intellectual property
• S18 - Details of group relief

The IRD may also request additional information or documents. Contracts, invoices, and bank statements are commonly sought to support the return.

Record Keeping and Compliance

Every person chargeable to profits tax must keep sufficient records to enable the assessable profits to be readily ascertained. Records must be retained for at least seven years after the completion of the transactions to which they relate. Failure to keep proper records may result in penalties under section 80 of the Inland Revenue Ordinance.

The IRD may conduct field audits or tax investigations. During an investigation, the taxpayer must produce all relevant records and answer questions. Penalties for tax offences under sections 80 and 82A can include additional tax of up to three times the amount undercharged, plus a fine and imprisonment.