Hong Kong Offshore Tax Regime and EU Tax Cooperation: Impact of Economic Substance Laws on Offshore Structures

The European Union’s removal of Hong Kong from its “cooperative jurisdiction” list on 14 February 2023, and the subsequent implementation of the Inland Revenue (Amendment) (Taxation on Foreign-sourced Disposal Gains) Ordinance 2023 (the “2023 Ordinance”), has fundamentally altered the calculus for offshore holding structures routed through Hong Kong. For over a decade, family offices and mid-cap groups relied on Hong Kong’s territorial source principle to shelter foreign-sourced disposal gains from tax, a position that became untenable when the EU’s Code of Conduct Group (Business Taxation) formally objected to the regime in 2021. The 2023 Ordinance, effective from 1 January 2023, introduced a “deemed taxable” rule for foreign-sourced disposal gains on “qualifying intellectual property” and certain equity interests, unless the taxpayer can demonstrate adequate economic substance in Hong Kong. This shift, coupled with the EU’s ongoing peer review of Hong Kong’s compliance with the “economic substance” standard under the revised “Criteria for Cooperative Jurisdictions” (2024 version), means that any offshore structure relying on Hong Kong as a pure conduit jurisdiction now faces material tax exposure. The 2025-2026 review cycle by the EU’s Code of Conduct Group will examine whether Hong Kong’s enforcement of the economic substance requirement is “effective and proportionate,” directly impacting the viability of BVI and Cayman holding companies managed from Hong Kong.

The 2023 Ordinance: Deemed Taxable Gains and the Economic Substance Defence

The core of Hong Kong’s revised offshore tax regime is found in the Inland Revenue (Amendment) (Taxation on Foreign-sourced Disposal Gains) Ordinance 2023, which inserted new sections 15I to 15Q into the Inland Revenue Ordinance (Cap. 112). This legislation creates a “deemed taxable” framework for foreign-sourced disposal gains derived by a person carrying on a trade, profession, or business in Hong Kong. The operative tax position is that such gains are now chargeable to profits tax unless the taxpayer can demonstrate sufficient economic substance in Hong Kong.

Scope of the Deemed Taxable Gains

The 2023 Ordinance applies to disposal gains arising from the sale of “qualifying intellectual property” (including patents, copyrights, trademarks, and designs) and “equity interests” (shares or comparable interests in an entity) that are “foreign-sourced” under the territorial source principles. The Inland Revenue Department (IRD) has confirmed in its Departmental Interpretation and Practice Notes (DIPN) No. 59 (2023) that the deeming provision applies to gains accruing on or after 1 January 2023, regardless of when the underlying asset was acquired. For a Hong Kong-based family office holding a BVI-incorporated subsidiary that disposes of a Cayman-incorporated operating company, the gain on that disposal is now prima facie taxable in Hong Kong at the standard profits tax rate of 16.5% (or 8.25% for the first HKD 2 million of assessable profits under the two-tiered rates regime).

The Economic Substance Requirement

The defence against this deemed taxation is the “economic substance” requirement under section 15K of the IRO. The taxpayer must demonstrate that it has “adequate” economic substance in Hong Kong during the relevant period. The IRD’s DIPN No. 59 specifies four key criteria: (i) the number of full-time employees in Hong Kong with “requisite qualifications” (typically senior management and operational staff); (ii) the amount of operating expenditure incurred in Hong Kong; (iii) the physical presence of an office or premises in Hong Kong; and (iv) the “decision-making” nexus, meaning that strategic decisions regarding the disposal are made in Hong Kong. The IRD has indicated that a “one-person” holding company with a shared service agreement and a virtual office will generally fail this test. In practice, the IRD expects at least two to three senior employees with relevant experience and an annual operating expenditure of at least HKD 1 million to HKD 2 million for a standard holding entity.

Interaction with Existing Treaty Protections

The 2023 Ordinance does not override double taxation agreements (DTAs) that Hong Kong has concluded. For example, under the Hong Kong-Mainland China Double Taxation Arrangement (Article 13), gains from the disposal of shares in a Mainland-resident company by a Hong Kong resident are generally taxable only in Hong Kong if the Hong Kong resident is the “beneficial owner” of the shares. However, the “beneficial owner” test under the OECD’s 2011 Report on Treaty Abuse requires the Hong Kong entity to have “substance” (i.e., the ability to control the asset and the income derived from it). A Hong Kong holding company that fails the economic substance test under the 2023 Ordinance will likely also fail the beneficial ownership test under the DTA, exposing the gain to taxation in the source jurisdiction (e.g., Mainland China at 10% withholding tax on capital gains, subject to any applicable treaty relief). This dual failure creates a “taxation gap” that the IRD and the EU are actively monitoring.

EU Code of Conduct Group: Economic Substance as a Gatekeeping Standard

The EU’s “Criteria for Cooperative Jurisdictions” were revised in February 2024 to include a specific requirement that jurisdictions with “preferential tax regimes” must have “effective economic substance requirements” that are “enforced in practice.” Hong Kong’s 2023 Ordinance was specifically designed to meet this criterion, but the EU’s assessment is ongoing.

The EU’s “Economic Substance” Standard

The EU’s standard is derived from the OECD’s Base Erosion and Profit Shifting (BEPS) Action 5 (Countering Harmful Tax Practices More Effectively, Taking into Account Transparency and Substance). The EU requires that a jurisdiction’s economic substance requirement be “commensurate with the level of activities” that the entity undertakes. For a holding company, the EU expects the entity to have: (i) a physical office; (ii) at least one locally resident director with “strategic decision-making authority”; (iii) adequate staff and expenditure relative to the value of assets held; and (iv) records of board meetings held in the jurisdiction. The EU’s Code of Conduct Group has indicated that it will review Hong Kong’s enforcement of the 2023 Ordinance in its 2025-2026 cycle, focusing on the number of audits conducted, the penalties imposed for non-compliance, and the IRD’s interpretation of “adequate” substance.

The “Preferential Regime” Designation

The EU classified Hong Kong’s previous offshore regime as a “preferential regime” because it offered a zero-tax rate for foreign-sourced gains without requiring any economic substance. The 2023 Ordinance removed this preferential treatment by making such gains taxable unless substance is demonstrated. However, the EU has noted that the 2023 Ordinance still provides a “de facto” zero-tax rate for entities that can demonstrate substance, which the EU considers acceptable only if the substance requirement is “genuine and effective.” The EU’s concern is that Hong Kong’s regime could still be used as a conduit for “stateless” income if the IRD’s enforcement is lax. The Hong Kong government has responded by stating in its 2024 Budget that the IRD will conduct “targeted audits” of at least 100 holding companies per year starting from the 2024-2025 assessment year.

Impact on BVI and Cayman Structures

For Hong Kong-based family offices using BVI or Cayman holding companies, the EU’s scrutiny has direct implications. BVI and Cayman have themselves enacted economic substance laws under the EU’s “blacklist” pressure (the BVI Economic Substance Act, 2018, and the Cayman Economic Substance Law, 2018). A BVI holding company that is “tax resident” in Hong Kong (i.e., managed and controlled from Hong Kong) must now demonstrate economic substance in Hong Kong under the 2023 Ordinance, or face taxation on its disposal gains. Conversely, if the BVI holding company is “tax resident” in the BVI (i.e., managed and controlled from the BVI), it must demonstrate economic substance in the BVI under the BVI Economic Substance Act. A common structure—a BVI holding company with a Hong Kong management office and a Cayman operating subsidiary—now faces a “substance trap”: the IRD may argue that the BVI company is managed and controlled from Hong Kong, making it Hong Kong tax resident, while the BVI’s International Tax Authority may argue that the company has failed to demonstrate substance in the BVI, leading to penalties of up to USD 200,000 per year under the BVI Economic Substance Act. This dual exposure requires careful planning to ensure that the company’s “place of effective management” (POEM) is clearly established in one jurisdiction.

Structuring for Substance: Practical Implementation for Family Offices

Given the dual pressures from the 2023 Ordinance and the EU’s review, family offices and mid-cap groups must proactively restructure their offshore holding chains to ensure compliance while maintaining tax efficiency.

The “Substance First” Approach

The most straightforward approach is to ensure that the Hong Kong holding entity has genuine economic substance. This means: (i) a dedicated office in a Grade A building in Central or Admiralty (not a co-working space); (ii) at least two full-time employees with relevant experience (e.g., a CFO and a legal/compliance officer); (iii) annual operating expenditure of at least HKD 2 million to HKD 5 million, depending on the value of assets held; and (iv) board meetings held in Hong Kong with detailed minutes. The IRD’s DIPN No. 59 states that “the level of substance required will depend on the nature and scale of the business,” but for a holding company with assets exceeding USD 50 million, the IRD expects a substance level commensurate with a mid-sized corporate office. The cost of this substance—approximately HKD 2 million to HKD 4 million per year—is a small price compared to the 16.5% profits tax on a USD 10 million disposal gain (approximately HKD 12.8 million in tax).

The “BVI/Cayman Substance” Alternative

For groups that cannot relocate management to Hong Kong, an alternative is to ensure that the BVI or Cayman holding company maintains its tax residence in its jurisdiction of incorporation. This requires: (i) board meetings held in the BVI or Cayman (not by telephone or video conference); (ii) a locally resident director (often provided by a licensed corporate services provider); (iii) a physical office in the BVI or Cayman (typically a serviced office); and (iv) compliance with the BVI or Cayman economic substance filing requirements. The BVI’s “economic substance test” for a “pure equity holding entity” is relatively light: the entity must comply with its statutory filing obligations and have “adequate” employees and premises in the BVI. However, the BVI’s International Tax Authority has taken an increasingly strict view, and as of 2024, it has imposed penalties on approximately 15% of filing entities for non-compliance (source: BVI International Tax Authority, 2024 Annual Report).

The “Treaty-Protected” Structure

For groups with significant exposure to Mainland China, a hybrid structure may be optimal. The Hong Kong-Mainland China Double Taxation Arrangement (Article 13) provides that gains from the disposal of shares in a Mainland-resident company are taxable only in Hong Kong if the Hong Kong resident is the “beneficial owner” of the shares. To satisfy the beneficial ownership test, the Hong Kong holding company must have “substantive business operations” in Hong Kong, including: (i) the ability to make independent investment decisions; (ii) the ability to manage the risk associated with the investment; and (iii) the ability to control the disposal of the shares. The State Administration of Taxation (SAT) of China has issued Bulletin No. 9 of 2019, which provides that a Hong Kong resident claiming treaty benefits must demonstrate “substantive business operations” in Hong Kong. A Hong Kong holding company that meets the economic substance test under the 2023 Ordinance will generally also meet the SAT’s beneficial ownership test, providing a “double lock” of protection.

Enforcement Risks and the 2025-2026 Review Cycle

The IRD has signalled that it will actively enforce the 2023 Ordinance. In its 2024-2025 Annual Report, the IRD stated that it had selected 120 holding companies for audit in the 2024-2025 assessment year, focusing on entities with “low substance” (i.e., less than HKD 1 million in operating expenditure and fewer than two employees). The IRD has also indicated that it will apply penalties under section 82A of the IRO (penalty for incorrect returns) of up to 100% of the tax undercharged for cases where the taxpayer failed to disclose the disposal gain or provided false information about its substance.

The EU’s 2025-2026 review cycle will examine whether Hong Kong’s enforcement is “effective and proportionate.” If the EU determines that Hong Kong’s regime remains “preferential” (i.e., that the economic substance requirement is not being enforced in practice), Hong Kong could be re-listed on the EU’s “grey list” (the list of jurisdictions with harmful tax practices). A grey-listing would trigger: (i) enhanced due diligence by EU financial institutions on any transaction involving a Hong Kong entity; (ii) potential withholding tax implications under EU anti-tax avoidance directives; and (iii) reputational damage that could affect Hong Kong’s status as an international financial centre. The Hong Kong government has stated that it will “take all necessary measures” to remain on the cooperative list, but the outcome of the 2025-2026 review remains uncertain.

Actionable Takeaways

1. Conduct a substance audit immediately — Review all offshore holding entities managed from Hong Kong to determine whether they meet the economic substance test under the 2023 Ordinance, using the IRD’s DIPN No. 59 criteria as a baseline.
2. Document the “place of effective management” — For any BVI or Cayman holding company, ensure that board meetings are held in the jurisdiction of incorporation and that minutes clearly record the location and decision-making process.
3. Realign treaty benefit claims — For groups with Mainland China exposure, ensure that the Hong Kong holding company’s substance is sufficient to satisfy the SAT’s beneficial ownership test under Bulletin No. 9 of 2019, to avoid double taxation.
4. Budget for substance costs — Allocate at least HKD 2 million to HKD 4 million per year per holding entity for office, staff, and compliance costs, treating this as a non-negotiable cost of maintaining tax efficiency.
5. Monitor the EU’s 2025-2026 review — Appoint a tax advisor to track the EU’s Code of Conduct Group’s assessment of Hong Kong’s enforcement, and be prepared to restructure if Hong Kong is re-listed on the grey list.

Disclaimer: 本文不構成稅務建議。涉及個人稅務情況請諮詢持牌會計師或稅務師。 / This does not constitute tax advice. Consult a licensed CPA or tax advisor for your specific situation.