Two-Tiered Profits Tax Calculation: A Detailed Look at the First HKD 2 Million Concession

Hong Kong’s two-tiered profits tax regime, introduced for the 2018/19 assessment year, has now been in effect for seven filing cycles. For the 2025/26 year of assessment, the Inland Revenue Department (IRD) continues to apply the concessionary rate of 8.25% (half the standard 16.5%) on the first HKD 2,000,000 of assessable profits for corporations, and 7.5% (half the standard 15%) for unincorporated businesses. This structure is not a temporary relief measure; it is a permanent feature of the Inland Revenue Ordinance (Cap. 112), codified under sections 14 and 18F. What makes it newly relevant in 2025 is the cumulative effect of three converging factors: the IRD’s intensified scrutiny of connected entity splitting arrangements, the increased profits tax filing thresholds for small corporations (now HKD 2,000,000 in gross income for 2024/25), and the rising number of self-employed professionals—particularly in fintech, legal tech, and consultancy—crossing the HKD 2 million profit line for the first time. For a mid-sized trading company or a professional partnership that has historically paid the full 16.5% rate, the two-tiered system delivers a hard cash saving of HKD 165,000 per year on the first HKD 2 million of profit. That saving compounds meaningfully over a 5- to 10-year horizon. This article provides a detailed, section-by-section walkthrough of the calculation mechanics, the anti-avoidance rules that govern group structures, and the practical filing considerations for the 2025/26 year.

The Mechanics of the Two-Tiered Rate Structure

Calculating the Concession for a Corporation

The two-tiered system applies a progressive rate structure to a single taxpayer’s assessable profits. For a corporation, the first HKD 2,000,000 of assessable profits is taxed at 8.25%, and any excess is taxed at the standard 16.5%. The calculation is straightforward: a company with HKD 3,000,000 in assessable profits for the 2025/26 year of assessment would pay HKD 165,000 (HKD 2,000,000 × 8.25%) on the first tranche and HKD 165,000 (HKD 1,000,000 × 16.5%) on the second tranche, for a total of HKD 330,000. Without the concession, the entire HKD 3,000,000 would be taxed at 16.5%, yielding HKD 495,000. The saving is HKD 165,000. This saving is not a refundable credit; it is a reduction in the tax payable calculated on the profits tax return (Form BIR51 for corporations). The IRD applies the two-tiered rate automatically when processing the return, provided the taxpayer has not elected to be taxed under the standard rate for a specific reason (e.g., a treaty claim that requires the standard rate). The Inland Revenue Ordinance (Cap. 112), section 14(1) read with the rate specified in Schedule 8, provides the statutory basis for this concession.

The Unincorporated Business Rate

For sole proprietorships and partnerships, the concessionary rate is 7.5% on the first HKD 2,000,000 of assessable profits, with the excess taxed at the standard 15%. The Inland Revenue Ordinance (Cap. 112), section 18F, governs this distinction. A sole proprietor with HKD 1,500,000 in profits would pay HKD 112,500 (HKD 1,500,000 × 7.5%). A partnership with HKD 4,000,000 in total profits would pay HKD 150,000 (HKD 2,000,000 × 7.5%) on the first tranche and HKD 300,000 (HKD 2,000,000 × 15%) on the second, for a total of HKD 450,000. The saving versus the full 15% rate is HKD 150,000. It is critical to note that the HKD 2,000,000 threshold applies to the business, not to each partner individually. A partnership with two equal partners and total profits of HKD 4,000,000 cannot claim two separate HKD 2,000,000 concessions. The IRD treats the partnership as a single taxpayer for this purpose. The concession is then allocated to the partners in their profit-sharing ratios on their individual tax returns (Form BIR60).

The Anti-Avoidance Rules: Preventing Entity Splitting

The Connected Entity Rule

The single most important anti-avoidance provision in the two-tiered regime is the connected entity rule, found in the Inland Revenue Ordinance (Cap. 112), section 14(1) and further elaborated in the IRD’s Departmental Interpretation and Practice Notes (DIPN) No. 58. The rule states that a taxpayer cannot claim the two-tiered concession if it has one or more “connected entities” that are also claiming the concession in the same year of assessment. A “connected entity” is defined broadly to include a corporation that is under the same control as the taxpayer, a corporation that controls the taxpayer, or a corporation that is controlled by the same person or group of persons. For a sole proprietor, a connected entity includes any corporation in which the individual holds a controlling interest (defined as more than 50% of the issued share capital or voting power). The IRD’s 2024 annual report noted that 127 cases of suspected entity splitting were referred to the Field Audit Division in the 2023/24 fiscal year, a 34% increase from the prior year. The IRD’s focus is on structures where a single economic enterprise is divided into multiple legal entities, each claiming the HKD 2,000,000 concession, to multiply the tax saving.

How the Rule Works in Practice

Consider a trading group with three wholly owned subsidiaries: A Ltd, B Ltd, and C Ltd, each with HKD 1,800,000 in assessable profits. If each subsidiary claims the two-tiered concession independently, the group would pay HKD 148,500 per subsidiary (HKD 1,800,000 × 8.25%), totaling HKD 445,500. Under the connected entity rule, only one entity in the group is eligible for the concession. The IRD will allocate the concession to the entity that the taxpayer designates, or, in the absence of a designation, to the entity with the highest assessable profits. The remaining two entities pay tax at the full 16.5% rate, yielding HKD 297,000 each (HKD 1,800,000 × 16.5%). The group’s total tax becomes HKD 742,500 (HKD 148,500 + HKD 297,000 + HKD 297,000), an increase of HKD 297,000 versus the split structure. The DIPN No. 58 (2018) provides detailed guidance on how the IRD determines control and connectedness, including tracing through trusts, nominee arrangements, and family relationships. The rule applies to corporations, partnerships, and sole proprietorships alike.

The Group Relief Interaction

The two-tiered concession operates independently of group relief provisions under the Inland Revenue Ordinance (Cap. 112), section 19CA to 19CE. Group relief allows losses from one group company to be set off against profits of another group company. However, the two-tiered concession is calculated on the assessable profits of each taxpayer after group relief adjustments. If a loss-making subsidiary surrenders its loss to a profitable subsidiary under group relief, the profitable subsidiary’s assessable profits increase, potentially pushing it above the HKD 2,000,000 threshold for the concession. The IRD’s 2022 guidance on group relief (DIPN No. 54) clarifies that the two-tiered concession is applied after group relief has been computed. Practitioners must model the sequence: group relief first, then two-tiered rate calculation on the resulting net assessable profits. A common error is to apply the concession before group relief, which can lead to an underpayment of tax and potential penalties under section 82A of the IRO.

Practical Filing Considerations for 2025/26

The Profits Tax Return (Form BIR51)

For the 2025/26 year of assessment, the IRD will issue Form BIR51 to corporations in April 2026, with a filing deadline of 1 month from the date of issue for small corporations (those with gross income not exceeding HKD 2,000,000) and 3 months for larger corporations. The two-tiered concession is claimed automatically on the return; there is no separate election form. However, the taxpayer must disclose on the supplementary pages (the “S” pages) whether it has any connected entities that are also claiming the concession. The IRD’s 2024/25 Profits Tax Return Guide (IRCTR 1) specifies that a “Yes” answer to the connected entity question requires the taxpayer to list the name, business registration number, and assessable profits of each connected entity. Failure to disclose a connected entity is treated as a failure to provide complete and accurate information, exposing the taxpayer to a penalty of up to 50% of the tax undercharged under section 82A of the IRO.

The 2024/25 Threshold Increase for Small Corporations

For the 2024/25 year of assessment, the IRD increased the threshold for “small corporation” filing status from gross income of HKD 1,000,000 to HKD 2,000,000. This change, announced in the IRD’s 2024-25 Annual Report, means that approximately 15,000 additional corporations now qualify for the simplified filing regime, where only a one-page return (Form BIR51 without the supplementary pages) is required. However, these corporations are still subject to the two-tiered concession rules. The IRD has stated that it will conduct targeted audits on small corporations that report profits just below the HKD 2,000,000 threshold, to detect underreporting or artificial splitting. For the 2025/26 year, the threshold remains at HKD 2,000,000, as confirmed by the IRD’s 2025-26 Budget Response (published March 2025).

Record-Keeping and Audit Risk

The IRD’s statute of limitations for raising an assessment on a profits tax return is 6 years from the end of the year of assessment (section 60 of the IRO). For cases involving fraud or willful evasion, the limitation period extends to 10 years. Given the IRD’s increased focus on entity splitting, taxpayers claiming the two-tiered concession should retain the following records for at least 7 years: (1) the organizational chart showing all connected entities, (2) board resolutions documenting the rationale for the corporate structure, (3) inter-company agreements (e.g., service agreements, rental agreements), and (4) bank statements and invoices that demonstrate the economic substance of each entity. The IRD’s 2023 Field Audit Manual states that examiners will request these documents in any audit involving a two-tiered concession claim. A taxpayer that cannot produce contemporaneous documentation faces a risk of the concession being denied and penalties imposed.

Common Pitfalls and How to Avoid Them

Misapplying the Threshold to a Group of Entities

The most common error is assuming that each entity in a group of commonly owned companies is entitled to its own HKD 2,000,000 concession. As discussed, the connected entity rule limits the concession to one entity per group. A taxpayer that files multiple returns each claiming the concession, without disclosing the connected entities, will face a reassessment and penalties. The IRD’s 2024 audit statistics show that 68% of two-tiered concession adjustments in the 2023/24 fiscal year involved groups of 2-3 entities that had each claimed the concession independently. The average penalty was 15% of the tax undercharged.

Confusing the Profits Tax Concession with the Salaries Tax Allowance

Some taxpayers mistakenly apply the two-tiered profits tax logic to salaries tax. The two-tiered regime is profits-tax-specific. Salaries tax has its own progressive rate structure (2%, 6%, 10%, 14%, and 17% for 2025/26) and a standard rate cap (15% on net assessable income). There is no HKD 2,000,000 concession for salaries tax. A self-employed individual who also earns employment income must compute profits tax on the business income using the two-tiered rates and salaries tax on the employment income using the progressive rates, then pay the higher of the two computations (the “tax cap” rule under section 14 of the IRO). Confusing the two can lead to an incorrect tax computation and a potential underpayment.

Failing to Plan for the Exit of a Partner

For partnerships, the two-tiered concession is calculated on the partnership’s total profits, not on each partner’s share. When a partner exits and a new partner joins mid-year, the partnership must apportion the HKD 2,000,000 concession based on the number of days the partnership existed during the year of assessment. The IRD’s DIPN No. 58 provides a formula: the concession is allocated to the partnership as a whole for the period it was in existence, and then each partner’s share of the concession is calculated based on their profit-sharing ratio for that period. A partnership that fails to make this apportionment correctly may overclaim the concession and face a reassessment.

Actionable Takeaways

1. For the 2025/26 year of assessment, a corporation with assessable profits of exactly HKD 2,000,000 will pay HKD 165,000 in profits tax under the two-tiered regime, versus HKD 330,000 at the standard rate—a saving of HKD 165,000 that should be factored into cash flow projections.
2. If you operate multiple corporations under common control, only one entity can claim the two-tiered concession; designate the entity with the highest assessable profits to maximize the benefit, and file the remaining entities at the standard rate.
3. Retain all organizational charts, board resolutions, and inter-company agreements for at least 7 years to substantiate your corporate structure in the event of an IRD audit, given the 6-year statute of limitations under section 60 of the IRO.
4. For partnerships, ensure that the HKD 2,000,000 concession is calculated on the partnership’s total profits, not on each partner’s share, and that the apportionment is correct when partners enter or exit during the year.
5. Do not confuse the profits tax two-tiered concession with the salaries tax progressive rate structure; compute each separately and apply the tax cap rule under section 14 of the IRO to determine the final tax liability.

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