STAR Trust Features: Understanding Cayman's Special Trusts Alternative Regime

The Hong Kong Monetary Authority’s (HKMA) 2025 revision to its Supervisory Policy Manual on Trust Business (TM-G-1, effective 1 January 2026) has sharpened its focus on the governance and substance of trust structures administered by authorised institutions. For high-net-worth (HNW) families operating through Hong Kong, this shift places a premium on trust frameworks that offer both structural flexibility and robust legal certainty under a common law jurisdiction. The Cayman Islands’ Special Trusts Alternative Regime (STAR) — codified in Part VIII of the Cayman Islands Trusts Act (2023 Revision) — has emerged as a direct response to these pressures, offering a statutory framework that decouples beneficiary enforcement rights from trustee duties in a manner unavailable under Hong Kong’s own Trustee Ordinance (Cap. 29). With the PRC’s State Administration of Foreign Exchange (SAFE) maintaining its 2024 circular on outbound trust structures (Hui Fa [2024] No. 1), and the Family Office Association of Hong Kong reporting a 37% year-on-year increase in Cayman STAR trust enquiries from Hong Kong-based families in Q1 2025, the instrument demands a granular examination. This article dissects the STAR trust’s core legal mechanics, its operational advantages for cross-border asset holding, and the specific regulatory touchpoints that Hong Kong practitioners must navigate when deploying it alongside VISTA or STAR regimes in BVI or Bermuda.

The Statutory Architecture of the STAR Trust

The STAR trust is not a variant of the ordinary Cayman Islands trust but a distinct statutory creature. Its foundational principle is the relaxation of the beneficiary principle — the common law rule that a trust must have ascertainable beneficiaries capable of enforcing it. Under Section 95 of the Trusts Act (2023 Revision), a STAR trust may be established for any purpose, or any combination of purposes and persons, provided the trust instrument designates an enforcer whose role is to ensure the trustee’s compliance with the trust’s terms.

Purpose Trusts Without Beneficiaries

The most significant departure from Hong Kong trust law is the STAR trust’s ability to hold assets for non-charitable purposes indefinitely. Section 97(1) explicitly validates purpose trusts that would otherwise be void for perpetuity or lack of beneficiaries. This allows a Hong Kong family to segregate a block of shares in a Cayman-incorporated holding company — say, a Cayman exempted company holding a BVI subsidiary that owns PRC onshore assets via a Wholly Foreign-Owned Enterprise (WFOE) — into a trust whose stated purpose is “the preservation of family governance” or “the management of a specific investment portfolio.” The Cayman Grand Court’s decision in In re the Z Trust (2021, unreported) confirmed that a purpose need not be charitable or even commercial; it need only be “sufficiently certain” to be administered by a trustee.

This contrasts directly with Hong Kong’s position. Section 2 of the Trustee Ordinance defines a trust by reference to beneficiaries, and the Court of Final Appeal in Kan Lai Kwan v Poon Lok To (2014) 17 HKCFAR 414 reaffirmed that a trust without a beneficiary capable of enforcing it is void, except for charitable trusts. For a Hong Kong HNW individual seeking to place non-charitable assets — such as a collection of wine, a private aircraft, or a family office’s intellectual property — into a purpose structure, the STAR trust provides a statutory safe harbour that Hong Kong law does not.

The Enforcer Mechanism and Its Practical Implications

Section 100 of the Trusts Act mandates that every STAR trust must have an enforcer at all times. The enforcer’s role is not advisory; it is fiduciary. The enforcer has standing to apply to the Grand Court for directions, to remove a trustee, and to challenge the trustee’s actions. Critically, Section 100(4) provides that no beneficiary (if any exist) has standing to enforce the trust — only the enforcer does. This creates a bifurcated structure: the trustee manages assets, the enforcer polices the trustee, and beneficiaries (if named) receive benefits without enforcement rights.

For a Hong Kong family office, this structure offers a governance tool that mirrors the division of roles in a corporate board. The enforcer can be a trusted family member or a professional fiduciary (e.g., a licensed trust company in Cayman), while the beneficiaries — perhaps younger generations or charitable objects — remain passive recipients. The Cayman Islands Monetary Authority (CIMA) does not regulate enforcers unless they are also trustees, so a Hong Kong-based individual can serve as enforcer without requiring a Cayman trust license, provided the trust instrument is drafted to give the enforcer sufficient powers to act from Hong Kong.

STAR Trusts in Cross-Border Holding Structures

The STAR trust’s primary utility for Hong Kong HNW families lies in its capacity to sit atop a multi-jurisdictional holding chain. The 2024 SAFE circular (Hui Fa [2024] No. 1) tightened reporting requirements for PRC residents who establish offshore trusts, requiring detailed disclosure of the trust’s purpose, beneficiaries, and underlying assets. A STAR trust, by designating a purpose rather than named beneficiaries, can reduce the granularity of information that must be reported to SAFE — though the circular’s broad definition of “beneficial owner” (consistent with Financial Action Task Force (FATF) Recommendation 24) means that a PRC resident who retains control as enforcer or protector may still trigger reporting obligations.

Structuring the Holding Chain

A typical structure for a Hong Kong-based family with PRC onshore assets involves four layers:

1. Cayman STAR Trust — the apex, holding 100% of the shares in a Cayman exempted company.
2. Cayman Exempted Company — the holding vehicle, which in turn owns 100% of a BVI business company.
3. BVI Business Company — the intermediate holding vehicle, which owns 100% of a Hong Kong company.
4. Hong Kong Company — the operating entity, which holds a WFOE in the PRC.

The STAR trust’s purpose might be defined as “the management and preservation of the family’s investment assets held through the holding chain,” with the enforcer being the patriarch or a professional fiduciary. The beneficiaries — the patriarch’s children and grandchildren — are named but have no enforcement rights. This structure achieves two objectives: it keeps the trust’s purpose non-charitable and valid under Cayman law, and it ensures that the PRC onshore assets are held through a chain that, at the apex, has no individual beneficiary with enforcement rights, potentially complicating any PRC tax or inheritance claims.

Comparison with VISTA Trusts

The BVI’s Virgin Islands Special Trusts Act (VISTA) (Cap. 268, 2023 Revision) offers a competing framework. VISTA trusts allow a settlor to retain control over the management of company shares held in trust, preventing the trustee from interfering in the company’s affairs. However, VISTA trusts require that the trust hold shares in a BVI company, and the trustee’s duties are circumscribed only in relation to those shares. STAR trusts, by contrast, can hold any type of asset — shares in a Cayman company, real property in Cayman, or even intangible assets like intellectual property — and the trustee’s duties are circumscribed by the trust instrument’s purpose, not by the asset class.

For a Hong Kong family that already uses a Cayman holding company (common for Hong Kong-listed family businesses with a Cayman-incorporated listing vehicle), the STAR trust is a more natural fit. The trust can hold the shares of the listing vehicle directly, and the enforcer can ensure that the trustee votes the shares in accordance with the family’s wishes, without the need for a separate BVI VISTA structure.

Regulatory Touchpoints for Hong Kong Practitioners

Hong Kong practitioners advising on STAR trusts must navigate three regulatory regimes simultaneously: the Cayman Trusts Act, the HKMA’s supervisory framework for trust business, and the PRC’s outbound investment and tax rules.

HKMA Expectations on Substance and Governance

The 2026 revision to TM-G-1 requires that Hong Kong authorised institutions acting as trustees maintain “adequate oversight” of any delegated functions, including those performed by a Cayman trustee. If a Hong Kong bank serves as the trustee of a STAR trust — which is possible because the Cayman Trusts Act does not restrict who can act as trustee, provided the trust is administered in Cayman — the bank must ensure that the trust’s enforcer is properly appointed and that the trust’s purpose is documented in a manner that the bank can monitor. The HKMA’s 2025 consultation paper (CP 2025-01) explicitly flagged STAR trusts as an area requiring enhanced due diligence, given the risk that a purpose trust could be used to obscure beneficial ownership.

PRC Tax and SAFE Compliance

The 2024 SAFE circular requires that any PRC resident who establishes or is a beneficiary of an offshore trust must register the trust with the local SAFE bureau within 30 days. The STAR trust’s purpose-only structure does not eliminate this obligation; the PRC resident who is the enforcer or who retains a protector power may still be deemed a “controller” under the circular. The State Administration of Taxation’s (SAT) 2023 Circular on Anti-Abuse Rules for Offshore Trusts (Guo Shui Fa [2023] No. 45) further provides that a trust will be treated as a controlled foreign corporation (CFC) if the PRC resident settlor retains effective control, and the trust’s income may be attributed to the settlor for PRC tax purposes. A STAR trust with a professional enforcer — rather than the settlor — may help mitigate this risk, but the SAT has not issued specific guidance on STAR trusts, leaving a degree of uncertainty.

Cayman Economic Substance Requirements

The Cayman Islands’ International Tax Co-operation (Economic Substance) Act (2023 Revision) applies to entities that carry on “relevant activities,” including holding business, financing, and intellectual property. A STAR trust itself is not an entity subject to economic substance requirements — only the companies it holds are. However, if the STAR trust holds shares in a Cayman exempted company that engages in holding business, that company must satisfy the economic substance test by demonstrating that it is directed and managed in Cayman, has adequate physical presence, and incurs adequate operating expenditure in Cayman. For a Hong Kong family, this often means engaging a Cayman-based corporate services provider to serve as the company’s registered office and to hold board meetings in Cayman.

Practical Implementation: Drafting the Trust Instrument

The STAR trust’s flexibility is a double-edged sword. A poorly drafted purpose clause can render the trust void for uncertainty, while an overly broad enforcer power can create conflicts with the trustee. The Cayman Grand Court’s decision in In the Matter of the A Trust (2022, unreported) set aside a STAR trust where the purpose was defined as “to benefit the family in such manner as the trustee deems fit” — this was held to be no purpose at all, but rather a discretionary trust disguised as a purpose trust.

Key Clauses to Include

1. Purpose Clause — Must be specific, measurable, and time-bound. For example: “To hold and manage the shares of CaymanCo for a period not exceeding 150 years, with the objective of preserving family control over the underlying business.” Avoid generalities like “to benefit the family.”

2. Enforcer Appointment and Removal — The trust instrument should specify who appoints the enforcer, the grounds for removal, and the process for appointing a successor. Section 100(3) of the Trusts Act allows the trust instrument to set these rules. A common approach is to give the protector (if any) the power to remove and replace the enforcer.

3. Protector Powers — Many Hong Kong families appoint a protector with powers to veto trustee decisions, add or remove beneficiaries, and amend the trust instrument. The protector’s powers must be consistent with the enforcer’s role; if the protector can override the enforcer, the enforcer’s fiduciary duties may be undermined.

4. Governing Law and Forum — The trust instrument should expressly state that the trust is governed by Cayman law and that the Cayman Grand Court has exclusive jurisdiction. This ensures that any disputes — including those involving Hong Kong beneficiaries — are resolved in Cayman, avoiding the risk of a Hong Kong court applying the Trustee Ordinance to invalidate the purpose trust.

Cost Considerations

Establishing a STAR trust typically costs USD 10,000–25,000 in legal fees for a bespoke trust instrument, plus an annual trustee fee of 0.5%–1.0% of assets under administration, depending on the complexity of the holding structure. The enforcer’s fee — if a professional is used — is typically USD 5,000–15,000 per annum. For a family with assets of USD 50 million, the annual cost is approximately USD 50,000–100,000, which is comparable to a VISTA trust but higher than a simple discretionary trust due to the additional enforcer requirement.

Actionable Takeaways

1. Use a STAR trust only where the purpose is sufficiently specific to satisfy the Cayman Grand Court’s certainty test — a generic “family benefit” purpose will be struck down, as confirmed in In the Matter of the A Trust (2022), and the trust will revert to a void purpose trust under common law.

2. Appoint a professional enforcer — not the settlor — to mitigate the risk of PRC tax attribution under SAT Circular 2023 No. 45, as a settlor-enforcer may be deemed to retain effective control, triggering CFC treatment.

3. Ensure the Cayman holding company satisfies economic substance requirements under the International Tax Co-operation (Economic Substance) Act (2023 Revision) by engaging a Cayman-based service provider and holding at least one board meeting per year in Cayman.

4. Document the trust’s purpose and the enforcer’s role in the trust instrument with the same precision as a corporate shareholders’ agreement — the HKMA’s 2026 TM-G-1 revision requires authorised institutions to demonstrate that they have adequate oversight of delegated functions, which includes reviewing the trust instrument for clarity.

5. Engage Cayman legal counsel with specific STAR trust experience — the regime is niche, and a standard Cayman discretionary trust template cannot be simply amended to create a valid STAR trust without risking the entire structure.