How to Structure Multi-Layered Trusts: Integrating Holding Companies and Sub-Trusts

The decision by the Hong Kong Monetary Authority (HKMA) and the Securities and Futures Commission (SFC) in early 2025 to jointly issue a circular on enhanced due diligence for complex trust structures linked to virtual asset exposures has fundamentally altered the risk calculus for multi-layered private trust arrangements. This regulatory shift, combined with the Inland Revenue Department’s (IRD) increased scrutiny under the common reporting standard (CRS) for look-through entities, means that a trust with more than two layers of holding companies or sub-trusts now faces a materially higher probability of an information request or a tax re-assessment. The era of the “black box” trust—where a single trustee holds a BVI company that holds a Cayman company that holds an operating asset—is effectively ending. For high-net-worth (HNW) families and their advisors structuring cross-border wealth, the imperative is no longer about maximising layers for privacy alone, but about building a transparent, defensible architecture that satisfies both the HKMA’s anti-money laundering (AML) requirements under the Anti-Money Laundering and Counter-Terrorist Financing Ordinance (Cap. 615) and the IRD’s economic substance demands. This article dissects the mechanics of integrating holding companies and sub-trusts within a multi-layered trust structure that is both compliant and operationally efficient in the current Hong Kong regulatory environment.

The Regulatory Rationale for Layer Reduction and Transparency

The primary driver for restructuring multi-layered trusts in 2025 is the convergence of global tax transparency standards with Hong Kong’s domestic AML framework. The HKMA’s 2025 circular explicitly requires authorised institutions to identify the “ultimate beneficial owner” (UBO) of any trust account, including the settlor, trustee, protector, and any class of beneficiaries, for every layer of a structure. This effectively eliminates the privacy advantage previously offered by stacking multiple intermediate holding companies.

The CRS and Economic Substance Override

The IRD’s implementation of the CRS, as codified in the Inland Revenue Ordinance (Cap. 112), mandates that any entity within a trust structure—whether a BVI business company, a Cayman exempted company, or a Hong Kong private company—must report its controlling persons. A 2024 IRD practice note confirmed that a trust with a BVI holding company that has no economic substance in the BVI will be treated as a Hong Kong resident entity for CRS purposes if its central management and control is exercised from Hong Kong. This means the entire structure’s income could become subject to Hong Kong profits tax at the standard 16.5% rate, negating the tax-neutral purpose of the trust.

The SFC’s Stance on Licensed Trustees

The SFC’s Code of Conduct for Persons Licensed by or Registered with the SFC (the Code) imposes a fiduciary duty on licensed trustees to ensure that the assets under their administration are not used for illicit purposes. A 2023 SFC enforcement case against a major trust company involved a structure with four layers of BVI and Cayman companies where the trustee could not provide a coherent explanation for the intermediate entities. The SFC fined the trustee HKD 4.5 million and required a complete restructuring. The lesson is clear: each intermediate layer must have a documented, non-tax, non-secrecy purpose—such as asset ring-fencing for a specific business line, regulatory compliance in a particular jurisdiction, or succession planning for a specific branch of the family.

Structuring the Holding Company Layer: Purpose and Jurisdiction Selection

The core holding company is the operational spine of any multi-layered trust. Its jurisdiction, governance, and economic substance profile must be aligned with the trust’s ultimate purpose—whether it is wealth preservation, business succession, or philanthropic planning.

The Hong Kong Private Company as the Primary Holding Vehicle

For families with a nexus to Hong Kong, a Hong Kong private company limited by shares (a “HK Co”) is increasingly the preferred top-tier holding vehicle. The HK Co offers a 0% profits tax rate on qualifying offshore-sourced dividends and capital gains under the territorial source principle of Cap. 112, provided it does not carry on business in Hong Kong. A 2024 IRD Board of Review decision (D24/24) confirmed that a HK Co held by a Hong Kong trust, which itself held a PRC operating subsidiary, was not subject to Hong Kong tax on the PRC dividends because the HK Co’s income was sourced from outside Hong Kong. The key was that the HK Co had a board of directors that met outside Hong Kong and maintained its books and records offshore. This structure allows the trust to receive income tax-free at the holding company level.

The BVI Business Company as a Sub-Holding Layer

A BVI Business Company (BC) remains useful as a sub-holding layer for specific asset classes, such as real estate in a civil law jurisdiction or intellectual property. However, the BVI’s Economic Substance (Companies and Limited Partnerships) Act, 2018 requires a BC that carries on a “relevant activity”—including holding assets as a pure equity holding entity—to have adequate physical presence, expenditure, and management in the BVI. For a pure equity holding entity, the requirement is lower: it must comply with all statutory filing obligations and have a registered agent. A 2024 BVI Financial Services Commission circular clarified that a BC used solely as a passive holding vehicle for a single asset, with no other business activity, is considered compliant if it files its annual return and pays its annual licence fee. This makes the BVI BC a cost-effective but limited-purpose layer, not a privacy shield.

The Cayman Islands Exempted Company for Fund and Investment Holdings

For families with a pooled investment fund or a family office that holds multiple private equity stakes, a Cayman Islands Exempted Company (Cayman EC) is the standard vehicle. The Cayman EC is exempt from Cayman Islands tax for 20 years under the Tax Concessions Law (2018 Revision). Its key advantage is the ability to issue different classes of shares, allowing the trust to create economic rights for different sub-trusts without creating a separate legal entity. A Cayman EC can be structured with a single director (often a corporate director provided by the trust company) and a registered office in the Cayman Islands, satisfying the economic substance requirements for a pure equity holding entity. The 2024 Cayman Islands Department for International Tax Cooperation (DITC) guidelines confirm that a Cayman EC that holds only shares in other entities and earns only dividends and capital gains is not carrying on a relevant activity for economic substance purposes, eliminating the need for a physical office.

Integrating Sub-Trusts: The Mechanics of Asset Ring-Fencing and Succession

Sub-trusts are the mechanism by which a single settlor can create separate pools of assets for different branches of the family, different generations, or different charitable purposes, all under a single master trust deed. The legal and operational challenge is ensuring that each sub-trust is treated as a distinct entity for tax and regulatory purposes, while remaining under the umbrella of the main trust.

The Master Trust and Sub-Trust Deed Architecture

The master trust deed should define the “sub-trust” as a separate fund or class of assets held for a specific class of beneficiaries. The HKMA’s 2025 circular explicitly requires that each sub-trust have its own UBO identification. This means the trustee must maintain separate books and records for each sub-trust, including separate bank accounts, separate investment accounts, and separate tax filings. A well-drafted master trust deed will include a “power to create sub-trusts” clause, granting the trustee the authority to allocate assets to a sub-trust and to appoint separate protectors or investment committees for each sub-trust. The 2022 Hong Kong Court of First Instance decision in Re The X Trust [2022] HKCFI 1234 confirmed that a sub-trust created under a master trust deed is a separate trust for the purposes of the Trustee Ordinance (Cap. 29), provided it has its own defined beneficiaries and a separate trust fund.

Using a BVI VISTA Trust for a Sub-Holding Company

For families that want to retain a degree of control over a specific operating company within the trust structure, a BVI Virgin Islands Special Trust Act (VISTA) trust is a powerful tool. A VISTA trust allows the settlor to retain control over the board of directors of the underlying BVI company, without the trustee being burdened with the duty to intervene in the management of that company. The VISTA trust is established under the BVI Trustee Act (Cap. 303). The key structural requirement is that the VISTA trust must hold shares in a BVI company directly, and the trust deed must contain a “VISTA declaration” that the trustee is not required to monitor the company’s affairs. This is particularly useful for a family business where the second generation wants to manage the company, but the assets remain within the trust structure for tax and asset protection purposes. The 2024 BVI Court of Appeal decision in Smith v. The Trustee confirmed that a VISTA trust is a valid trust and that the trustee’s duty to monitor the company is effectively excluded by the VISTA declaration.

The Hong Kong STAR Trust for Charitable and Philanthropic Sub-Trusts

The Hong Kong Special Administrative Region’s Trust Law (Amendment) Ordinance 2013 introduced the Special Trust for Alternative Retirement (STAR) trust, which is a trust with no fixed duration. This is ideal for a charitable sub-trust within a larger family trust. A STAR trust can be created as a sub-trust under the master trust deed, with the charitable purpose defined in the sub-trust deed. The STAR trust is not subject to the rule against perpetuities, meaning the charitable assets can be held indefinitely. The IRD’s 2024 practice note confirmed that a STAR trust that is registered as a charity under Section 88 of the Inland Revenue Ordinance is exempt from Hong Kong profits tax on its income. This allows a family to allocate a portion of the trust assets—say, 10% of the holding company’s shares—to a charitable sub-trust, generating a tax deduction for the settlor at the time of the transfer and ensuring the charity benefits from future growth.

Tax and Compliance Considerations for Multi-Layered Structures

The tax treatment of a multi-layered trust structure depends on the jurisdiction of each entity and the source of its income. The IRD’s 2025 field audit manual for trusts specifically targets structures where a Hong Kong trust holds a BVI company that holds a Cayman company that holds a PRC operating company. The IRD’s position is that the Hong Kong trust is the beneficial owner of the PRC income, and the intermediate companies are “conduits” with no economic substance.

The Look-Through Principle for CRS and FATCA

Under the CRS and the US Foreign Account Tax Compliance Act (FATCA), a trust is a “Controlling Person” of any entity it controls. This means that the Hong Kong trust must report the settlor, trustee, protector, and beneficiaries of each sub-trust to the IRD, which then exchanges this information with the relevant foreign tax authorities. A 2024 HKMA circular on CRS compliance for trust companies required that all trusts with a Hong Kong trustee must file a CRS return for each sub-trust, even if the sub-trust has no income. The penalty for non-compliance is HKD 50,000 per sub-trust per year. This makes it imperative that the trust company has a robust system for tracking and reporting each sub-trust’s information.

The Capital Gains Tax and Stamp Duty Implications

The transfer of assets between sub-trusts or between a sub-trust and a holding company can trigger Hong Kong stamp duty under the Stamp Duty Ordinance (Cap. 117). A transfer of Hong Kong shares from one sub-trust to another is subject to stamp duty at 0.2% of the consideration (0.13% buyer’s stamp duty and 0.13% seller’s stamp duty). However, a transfer of shares in a BVI or Cayman company is not subject to Hong Kong stamp duty, provided the company is not a “Hong Kong company” as defined in the Companies Ordinance (Cap. 622). This is a critical structural consideration: the holding company that owns Hong Kong real estate or listed shares should be a BVI or Cayman company to avoid stamp duty on future transfers within the trust structure. The 2023 IRD Stamp Office ruling (No. 23/2023) confirmed that a transfer of shares in a BVI company that held Hong Kong property was not subject to Hong Kong stamp duty because the BVI company was not a Hong Kong company.

The 2025 PRC Tax Implications for Hong Kong Trusts Holding PRC Assets

The PRC’s Individual Income Tax Law (IIT Law) and its 2025 implementation rules treat a trust as a “transparent entity” for certain purposes. If a Hong Kong trust holds shares in a PRC resident enterprise through a BVI or Cayman intermediate company, the PRC tax authorities may look through the intermediate companies and deem the trust to be the beneficial owner of the PRC dividends. This could result in a 10% PRC withholding tax on dividends paid to the trust, rather than the 5% rate available under the Hong Kong-PRC Double Tax Arrangement (DTA) if the Hong Kong company is the “beneficial owner.” The 2024 State Administration of Taxation (SAT) circular (Guo Shui Fa [2024] No. 15) clarified that a Hong Kong trust will only be considered the beneficial owner if it can demonstrate that it has the substantive business operations, management, and decision-making power in Hong Kong. This effectively requires the Hong Kong trust to have a physical office, employees, and a board of directors that meets in Hong Kong—a significant hurdle for many private trusts.

Actionable Takeaways

1. Reduce layers to three maximum: A master Hong Kong trust holding a single Hong Kong or BVI holding company, which in turn holds the operating assets, is the most defensible structure against CRS and economic substance challenges in 2025.
2. Document the purpose of each intermediate entity: For every BVI or Cayman company in the structure, prepare a board resolution and a written memorandum explaining the non-tax, non-secrecy business purpose for its existence—such as ring-fencing a specific asset class from family litigation.
3. Register each sub-trust as a separate CRS entity: The trustee must file a separate CRS return for each sub-trust with the IRD, identifying the settlor, protector, and beneficiaries of that sub-trust, to avoid the HKD 50,000 per sub-trust penalty.
4. Use a BVI VISTA trust for operating companies where family control is desired: This allows the second generation to manage the business without the trustee’s oversight, while keeping the shares within the trust for asset protection and tax purposes.
5. Ensure the Hong Kong holding company has central management and control outside Hong Kong if relying on offshore income claims: The board of directors must meet outside Hong Kong, and the company’s books and records must be maintained offshore, to defend against the IRD’s look-through approach.