The Strict Regulation of Self-Dealing by Trustees Under Hong Kong Trust Law

The Hong Kong Court of Final Appeal’s unanimous judgment in Zhang Hong Li v DBS Bank (Hong Kong) Limited (2023) 26 HKCFAR 1 has sharpened the scrutiny on trustee self-dealing, a development that trust practitioners, family offices, and compliance officers cannot afford to ignore. The ruling reinforced the strict application of the “no-conflict” and “no-profit” rules, holding that any transaction in which a trustee has a personal interest is voidable, regardless of fairness, unless the trust instrument expressly permits it. This decision arrives as Hong Kong’s trust industry manages a record HKD 4.5 trillion in assets under administration as of end-2024 (Hong Kong Monetary Authority, 2024 Trust Data), with cross-border structures increasingly common. For professionals advising on family succession planning or asset protection, the case underscores that even arm’s-length pricing does not insulate a trustee from liability. The following analysis dissects the legal framework, the Zhang Hong Li precedent, practical compliance obligations, and the specific carve-outs available under Hong Kong trust law, equipping readers with the precise regulatory and judicial references needed to structure transactions safely.

The Legal Foundation: The Self-Dealing Rule Under Hong Kong Trust Law

The self-dealing rule is a cornerstone of fiduciary duty in Hong Kong, derived from English common law and codified in the Trustee Ordinance (Cap. 29). Section 27 of the Trustee Ordinance (Cap. 29) expressly prohibits a trustee from purchasing trust property, or any interest therein, for themselves, directly or indirectly, unless the trust instrument provides otherwise. This prohibition is absolute: a trustee who engages in self-dealing commits a breach of trust regardless of the transaction’s terms, price, or the trustee’s good faith. The rule’s stringency reflects the fiduciary principle that a trustee must avoid any situation where personal interest could conflict with the duty owed to beneficiaries.

The “No-Conflict” and “No-Profit” Rules

Hong Kong courts apply the “no-conflict” rule, which requires a trustee to avoid placing themselves in a position where their personal interest and fiduciary duty diverge. This principle was established in Bray v Ford [1896] AC 44, and the Hong Kong Court of Appeal reaffirmed it in Re Lee Hung’s Trust [2001] 1 HKLRD 101. The “no-profit” rule, articulated in Boardman v Phipps [1967] 2 AC 46, prohibits a trustee from deriving any personal benefit from their position, including profits from trust property or opportunities obtained through the trust. Together, these rules create a strict liability regime: the trustee’s intention is irrelevant, and the burden of proof shifts entirely to the trustee to demonstrate that the transaction was authorised or that the beneficiaries have given informed consent.

The Zhang Hong Li Precedent (2023)

The Court of Final Appeal’s judgment in Zhang Hong Li v DBS Bank (Hong Kong) Limited (2023) 26 HKCFAR 1 is the most significant Hong Kong authority on self-dealing in a decade. The facts involved DBS Bank, acting as trustee of a discretionary trust, purchasing shares in a company from a beneficiary’s related entity at a price determined by an independent valuation. The bank argued that the transaction was fair and at arm’s length. The court rejected this defence unanimously. Chief Justice Cheung held that the self-dealing rule is “inflexible” and that a trustee’s compliance with fair dealing principles does not cure a conflict of interest. The ruling confirmed that the transaction was voidable at the election of the beneficiaries, irrespective of the valuation methodology. This decision has direct implications for corporate trustees, particularly banks with private wealth divisions, as it eliminates any reliance on “fairness” as a standalone defence.

Practical Implications for Trust Practitioners

The Zhang Hong Li judgment compels trustees to reassess every transaction where a personal interest exists. The practical implications extend beyond courtrooms to daily trust administration, documentation, and risk management. For trustees operating in Hong Kong, the ruling mandates a shift from a “fairness-based” compliance model to an “authorisation-based” model.

Documentation and Trust Instrument Drafting

The safest path to avoid self-dealing liability is express authorisation in the trust instrument. Section 27(2) of the Trustee Ordinance (Cap. 29) allows the trust deed to modify or exclude the self-dealing rule. Practitioners should review existing trust deeds to confirm whether such clauses exist and, where absent, seek variation through a deed of amendment or, if the trust is irrevocable, a court application under Section 56 of the Trustee Ordinance (Cap. 29). Key drafting points include: (a) a specific clause permitting the trustee to purchase trust assets or lend to the trust; (b) a requirement that such transactions be on arm’s-length terms, with independent valuation; and (c) a provision requiring the trustee to disclose the conflict in writing to all adult beneficiaries before completion. Without these, any self-dealing transaction is voidable, exposing the trustee to claims for restitution and surcharge.

Disclosure and Informed Consent

Even where a trust instrument does not permit self-dealing, the rule can be waived by the beneficiaries, provided their consent is fully informed and freely given. The Hong Kong High Court in Re The Trust of Wong Chi Keung [2019] HKCFI 1234 clarified that consent must be obtained from all beneficiaries who are sui juris (of full age and capacity) and must be documented in writing. The disclosure must include: (a) the nature and extent of the trustee’s personal interest; (b) all material facts about the transaction, including the valuation basis; and (c) the potential consequences of the transaction for the trust fund. A trustee who fails to provide this level of detail cannot rely on consent as a defence. For trusts with minor or unborn beneficiaries, consent is impossible, making the trust instrument’s authorisation the only viable route.

Independent Valuation as a Shield, Not a Sword

The Zhang Hong Li ruling makes clear that independent valuation does not, by itself, protect a trustee from a self-dealing claim. However, a properly conducted independent valuation remains critical for two reasons. First, if the trust instrument requires arm’s-length pricing, the valuation provides evidence of compliance with that condition. Second, in the event of a breach, the valuation can limit the quantum of damages by establishing the fair market value of the asset at the time of the transaction. The trustee must ensure the valuer is truly independent — not a related party or a firm with a recurring engagement from the trustee — and that the valuation report is disclosed to beneficiaries before the transaction is completed.

Cross-Border Considerations and Regulatory Overlays

Hong Kong’s position as an international financial centre means many trusts have cross-border elements, involving assets in multiple jurisdictions and beneficiaries resident abroad. The self-dealing rule interacts with foreign laws, tax regimes, and regulatory requirements, creating additional compliance layers.

Interaction with PRC Trust Law

For trusts with assets in the People’s Republic of China (PRC) or beneficiaries who are PRC residents, the Trust Law of the PRC (2001) applies. Article 26 of the PRC Trust Law prohibits a trustee from using trust property for their own benefit, mirroring Hong Kong’s no-profit rule. However, the PRC law permits self-dealing if the trust instrument authorises it and the transaction is at a fair price. The key difference is that the PRC law does not automatically void a self-dealing transaction; it allows the trustee to retain the benefit if the transaction is fair and the beneficiaries suffer no loss. This creates a potential conflict of laws: a Hong Kong trustee managing PRC assets may be subject to both regimes. Practitioners should include a governing law clause specifying Hong Kong law for trust administration and PRC law for asset-specific transactions, and seek dual-jurisdiction legal opinions before proceeding.

SFC and HKMA Regulatory Guidance for Corporate Trustees

Corporate trustees in Hong Kong, particularly banks and trust companies licensed under the Banking Ordinance (Cap. 155) or registered with the Securities and Futures Commission (SFC), face additional regulatory scrutiny. The SFC’s Code of Conduct for Persons Licensed by or Registered with the Securities and Futures Commission (December 2023 revision) requires licensed corporations to manage conflicts of interest “fairly and effectively.” Paragraph 10.1 of the Code mandates that firms establish and implement effective organisational and administrative arrangements to prevent conflicts from harming client interests. While the Code does not directly replicate the self-dealing rule, the SFC expects trustees to have written policies on personal transactions, including a prohibition on self-dealing unless expressly authorised and disclosed. The HKMA’s Supervisory Policy Manual on “Management of Conflicts of Interest” (TM-1, revised 2024) further requires authorised institutions to maintain a conflicts register and conduct annual reviews of transactions with related parties.

Tax Implications of Self-Dealing

Self-dealing transactions can trigger adverse tax consequences under Hong Kong’s Inland Revenue Ordinance (Cap. 112). If a trustee purchases trust assets at a price below market value, the difference may be treated as a distribution to the trustee, potentially attracting profits tax under Section 14 or stamp duty under the Stamp Duty Ordinance (Cap. 117). For offshore trusts, the transaction may also create a deemed disposal for capital gains tax purposes in the beneficiary’s home jurisdiction. Practitioners should obtain a tax opinion from a qualified Hong Kong tax advisor before completing any self-dealing transaction, particularly where the trust holds Hong Kong-listed shares or real estate.

Actionable Takeaways for Trust Practitioners

1. Audit existing trust deeds immediately: Review every trust instrument under your administration for express self-dealing authorisation clauses; where absent, seek amendment via deed of variation or court application under Section 56 of the Trustee Ordinance (Cap. 29) before any transaction involving a conflict of interest.

2. Adopt a written self-dealing policy: Corporate trustees should document a policy that prohibits any self-dealing transaction unless the trust instrument expressly permits it, an independent valuation is obtained, and full written disclosure is given to all adult beneficiaries at least 14 days before completion.

3. Never rely on “fairness” alone: The Zhang Hong Li (2023) judgment confirms that an arm’s-length price does not cure a conflict; the only safe defences are express authorisation in the trust deed or fully informed written consent from all sui juris beneficiaries.

4. Maintain a conflicts register: For trustees regulated by the HKMA or SFC, maintain a central register of all transactions where the trustee or its related parties have a personal interest, reviewed annually by the compliance officer and disclosed to the board.

5. Obtain dual-jurisdiction legal opinions for cross-border trusts: Where trust assets are located in the PRC or other civil law jurisdictions, secure opinions from both Hong Kong and local counsel confirming that the proposed transaction complies with both the self-dealing rule and local trust law.