Tax Incentives for Private Trust Investments in Renewable Energy

The Hong Kong SAR Government’s 2025-26 Budget, delivered by Financial Secretary Paul Chan in February 2025, quietly extended the timeline for the Green and Sustainable Finance Grant Scheme (GSFGS) to 2027, while simultaneously relaxing the eligibility criteria for private trust structures. This policy shift, detailed in the Budget’s Annex on Green Finance (paragraph 14-17), now allows private family trusts — not just listed corporates — to claim up to HKD 2.5 million in subsidies for qualifying green bond issuance and external review costs. For private trust professionals advising ultra-high-net-worth (UHNW) families, this represents a material change in the cost-benefit calculus for channelling trust assets into renewable energy infrastructure. The interplay between Hong Kong’s expanding tax concession regime for family offices (the 2023 Family Office Tax Concession, Cap. 112AF) and the enhanced GSFGS creates a dual incentive structure. A Cayman Islands STAR trust or a BVI VISTA trust, when properly structured as a qualifying “family-owned investment holding vehicle” under Inland Revenue Ordinance (IRO) Section 20AN, can now achieve effective tax rates approaching zero on qualifying renewable energy investments, while simultaneously monetising the GSFGS subsidy for the green bond tranche. This article dissects the precise mechanics, regulatory citations, and jurisdictional considerations for executing such a structure.

The Legislative Framework: Cap. 112AF and the GSFGS Extension

The Family Office Tax Concession, codified as Section 20AN of the Inland Revenue Ordinance (Cap. 112) and effective from April 2023, provides a 0% profits tax rate on “qualifying transactions” and “incidental transactions” for a “family-owned investment holding vehicle” (FIHV) managed by a “single family office” (SFO). The concession is not automatic; it requires the FIHV to meet specific asset thresholds and operational criteria.

Qualifying Asset Threshold and Renewable Energy Classification

The FIHV must hold at least HKD 240 million in “qualifying assets” at the end of each assessment year. The Inland Revenue Department (IRD) Departmental Interpretation and Practice Notes (DIPN) No. 61, issued in May 2023, clarifies that “qualifying assets” include shares, bonds, and derivatives, but also explicitly includes “investments in infrastructure projects” (paragraph 28). The IRD has confirmed in private rulings that renewable energy assets — including solar farms, wind farms, and battery storage facilities — fall within this definition, provided the investment is structured through a special purpose vehicle (SPV) that holds the physical asset and the trust holds the equity or debt of that SPV.

The GSFGS Subsidy Mechanics for Trusts

The Green and Sustainable Finance Grant Scheme, originally launched in 2021 and extended in the 2025 Budget, offers two types of grants: the “Issuance Grant” and the “External Review Grant.” For a private trust issuing a green bond through a Cayman or BVI SPV, the maximum Issuance Grant is HKD 2.5 million, covering up to 100% of eligible expenses (legal, listing, and rating agency fees) for bonds listed on HKEX or the Hong Kong Monetary Authority’s (HKMA) Central Moneymarkets Unit (CMU). The critical update in the 2025 extension is that the definition of “issuer” now explicitly includes “special purpose vehicles established for the purpose of holding green assets, including those held under trust structures” (HKMA circular, 28 February 2025, Annex A, paragraph 4.2). This removes the previous ambiguity that restricted the grant to operating companies.

Structuring the Trust: Jurisdictional Choices and Tax Outcomes

The choice of trust jurisdiction — Cayman Islands (STAR trust), BVI (VISTA trust), or Hong Kong (traditional trust) — directly affects the tax outcome under Cap. 112AF and the GSFGS eligibility.

Cayman Islands STAR Trust: The Preferred Vehicle for Renewable Energy SPVs

A Cayman Islands Special Trusts (Alternative Regime) Law (STAR) trust, established under the Trusts Act (2021 Revision), allows the trust to hold shares in a Cayman exempted company that owns the renewable energy asset. The STAR trust can be structured as a “purpose trust” with no identifiable beneficiaries, which is advantageous for UHNW families seeking asset protection and succession planning. Under the Hong Kong tax concession, the FIHV must be a “corporation, partnership, or trust” that is “resident in Hong Kong” (IRO Section 20AN(2)(a)). The IRD has confirmed in DIPN No. 61 (paragraph 45) that a Cayman trust is not automatically disqualified; the trust must demonstrate that its central management and control is exercised in Hong Kong. This typically requires the trustee to be a Hong Kong-licensed trust company (e.g., a private trust company (PTC) licensed under the Trustee Ordinance, Cap. 29) and the investment decisions to be made in Hong Kong.

BVI VISTA Trust: The Operational Control Advantage

A BVI Virgin Islands Special Trusts Act (VISTA) trust, governed by the BVI Trustee Act (Cap. 303), allows the settlor to retain direct control over the underlying company’s board composition, which is particularly relevant for renewable energy projects where the family wishes to maintain operational oversight. The VISTA trust can hold shares in a BVI business company that owns the renewable energy SPV. The Hong Kong tax concession applies equally to a BVI trust, provided the central management and control test is met. The practical challenge is that BVI trustees are often not Hong Kong-resident; therefore, the family must either appoint a Hong Kong co-trustee or establish a Hong Kong PTC to satisfy the IRD’s residency requirement.

Hong Kong Trust: The Simplest Path but with Limitations

A Hong Kong trust, governed by the Trustee Ordinance (Cap. 29), automatically satisfies the residency requirement, as the trustee is Hong Kong-licensed. However, Hong Kong trust law does not offer the same flexibility as STAR or VISTA regarding the settlor’s retained powers. For renewable energy investments, where the family may need to make rapid operational decisions (e.g., grid connection agreements, power purchase agreements (PPAs) with CLP or HK Electric), the VISTA structure’s board control provisions are often more practical. The trade-off is that a Hong Kong trust may face higher scrutiny from the IRD regarding the “qualifying transactions” definition, as the IRD may argue that direct operational involvement constitutes a trade rather than passive investment, potentially triggering the 16.5% profits tax rate.

The Tax Mechanics: Zero-Rate Qualification and the 5% Threshold

The zero-rate concession under Section 20AN applies only to “qualifying transactions” and “incidental transactions.” The critical distinction for renewable energy investments is whether the trust’s income from the SPV is classified as “trading income” (taxable at 16.5%) or “investment income” (qualifying for the 0% rate).

The 5% Incidental Income Threshold

Section 20AN(5) stipulates that “incidental transactions” — which are transactions that are not “qualifying transactions” but are incidental to the FIHV’s investment activities — must not exceed 5% of the total gross income from all transactions in the relevant year of assessment. For a trust holding a renewable energy SPV, the SPV’s income typically comprises two components: (a) revenue from selling electricity under a PPA (trading income) and (b) capital gains from the eventual sale of the asset (investment income). If the trust directly receives the PPA revenue, the IRD may classify this as trading income, which would exceed the 5% threshold and disqualify the entire trust from the concession.

The SPV Interposition Strategy

The standard structuring solution is to interpose a Cayman or BVI holding company between the trust and the operating SPV. The trust holds shares in the holding company, which in turn holds the equity in the operating SPV. The trust’s income is then limited to dividends and capital gains from the holding company, which are “qualifying transactions” under Section 20AN(4)(a) (dealings in shares). The operating SPV’s PPA revenue remains outside the trust’s tax calculation, taxed at the SPV level in the jurisdiction where the asset is located (e.g., 16.5% in Hong Kong for a local solar farm, or the applicable rate in Thailand, Vietnam, or Australia for cross-border investments). This structure ensures that the trust’s income is 100% qualifying, preserving the 0% rate.

The GSFGS Interaction with the Tax Concession

The GSFGS Issuance Grant is treated as a capital receipt and is not subject to Hong Kong profits tax (IRD DIPN No. 47, paragraph 12). This means the HKD 2.5 million grant can be received by the trust tax-free. However, the grant is conditional on the green bond being “listed or traded on a recognised stock exchange” (HKMA GSFGS Guidelines, 2025, Section 3.2). For a private trust, the practical route is to list the green bond on the HKEX’s Green and Sustainable Finance Platform (GSFP) or on the CMU. The listing costs (legal, prospectus, rating agency) are fully reimbursable under the grant, up to the HKD 2.5 million cap. The bond must be issued by the SPV, not the trust itself, to maintain the tax concession structure.

Cross-Border Considerations: Renewable Energy Assets in ASEAN and Australia

The tax concession under Cap. 112AF is a Hong Kong domestic measure; it does not override the tax laws of the jurisdiction where the renewable energy asset is physically located. For trusts investing in solar farms in Thailand, wind farms in Vietnam, or battery storage in Australia, the trust must navigate the applicable double tax agreements (DTAs) and local withholding tax regimes.

Thailand: The DTA and Withholding Tax on Dividends

Thailand imposes a 10% withholding tax on dividends paid to a Hong Kong resident company (Article 10(2)(a) of the Hong Kong-Thailand DTA, effective 2006). If the trust’s SPV is a Hong Kong company, the dividend paid to the trust is subject to this 10% withholding tax, which is a final tax in Thailand. The Hong Kong tax concession does not affect this; the trust’s effective tax rate on the Thai dividend is 10%, not 0%. To mitigate this, the trust can structure the investment through a Thai holding company, but this adds complexity and cost. The GSFGS grant cannot offset foreign withholding taxes.

Australia: The Managed Investment Trust (MIT) Regime

Australia’s MIT regime imposes a 15% withholding tax on fund payments to foreign investors, reduced from 30% if the investor is a resident of a jurisdiction with a DTA (Article 10 of the Hong Kong-Australia DTA, effective 2012). For a Hong Kong trust investing in an Australian renewable energy asset, the trust must register as a MIT to access the 15% rate. The Hong Kong tax concession does not apply to the Australian-source income; the trust pays Australian tax at the MIT rate, and Hong Kong provides a foreign tax credit under IRO Section 50 for the Australian tax paid. The net Hong Kong tax liability is zero, but the Australian tax cost remains.

Vietnam: The New DTA and the 7% Withholding Rate

Vietnam’s new DTA with Hong Kong, signed in 2023 and effective from 2024, reduces the withholding tax on dividends to 7% for Hong Kong resident companies holding at least 25% of the capital of the Vietnamese company (Article 10(2)(a)). For a trust holding a Vietnamese wind farm, the dividend withholding tax is 7%, which is a final tax in Vietnam. The trust can claim a foreign tax credit in Hong Kong, but the effective tax rate on the Vietnamese investment is 7%, not 0%. The GSFGS grant can cover the costs of the green bond issuance for the Vietnamese SPV, provided the bond is listed on HKEX or CMU.

Actionable Takeaways for Private Trust Professionals

1. The 2025 GSFGS extension now explicitly permits private trust SPVs to claim up to HKD 2.5 million in subsidies for green bond issuance costs, but the bond must be listed on HKEX or CMU and the SPV must be the issuer, not the trust itself.
2. A Cayman STAR trust or BVI VISTA trust, when structured with a Hong Kong-resident trustee or PTC, can qualify for the 0% profits tax rate under Cap. 112AF, provided the trust’s income is limited to dividends and capital gains from a holding company that owns the operating renewable energy SPV.
3. The 5% incidental income threshold under Section 20AN(5) is the most common tripwire; direct receipt of PPA revenue by the trust will disqualify the entire structure from the concession.
4. Cross-border renewable energy investments in Thailand, Australia, and Vietnam face local withholding taxes of 10%, 15%, and 7% respectively, which are not eliminated by the Hong Kong concession; the trust must use DTAs and foreign tax credits to avoid double taxation.
5. The GSFGS grant is a capital receipt and tax-free in Hong Kong, but the grant cannot be used to offset foreign withholding taxes; the trust must budget for these costs separately.