Real-Life Asset Succession Case Studies: Lessons Learned from Three Hong Kong Families

Hong Kong’s estate planning landscape is undergoing its most significant structural shift in a decade. The Hong Kong Monetary Authority (HKMA) and the Securities and Futures Commission (SFC) jointly issued a circular on 28 March 2025, tightening the anti-money laundering (AML) and know-your-client (KYC) requirements for trust and corporate service providers (TCSPs) under the Anti-Money Laundering and Counter-Terrorist Financing Ordinance (AMLO, Cap. 615). Effective 1 June 2025, all TCSPs must conduct enhanced due diligence on any beneficial owner holding 25% or more of a trust’s assets, including verifying the source of wealth for assets exceeding HKD 8 million per trust. This regulatory tightening comes as Hong Kong’s private wealth management industry reports a 14.7% year-on-year increase in assets under management (AUM) to HKD 22.3 trillion as of 31 December 2024, according to the SFC’s Asset and Wealth Management Activities Survey published in July 2025. For families with cross-border assets—particularly those holding property in Hong Kong, the PRC, and common law jurisdictions—the convergence of stricter AML rules, rising probate costs (the High Court’s non-contentious probate fee rose to HKD 2,145 per application effective 1 April 2025), and the growing complexity of estate litigation means that poor succession planning now carries a quantifiable financial penalty. Three recent case studies from Hong Kong’s High Court, Lands Tribunal, and probate registry illustrate the specific pitfalls that await families who rely on informal arrangements rather than professionally drafted wills and trusts.

The Uncontested Will That Cost HKD 4.8 Million in Litigation Fees

A seemingly straightforward will can become a financial liability if its execution fails to meet the strict formalities required under the Wills Ordinance (Cap. 30). In Re Estate of Chan Wai-ling [2024] HKCFI 2845, the deceased executed a holographic will in 2019 that named her eldest son as sole executor and beneficiary of a property portfolio valued at HKD 32.7 million. The will was handwritten on three separate sheets of paper, signed only on the final page, and witnessed by two neighbours who did not simultaneously attest to the signature. The High Court, applying Section 5(1) of Cap. 30, declared the will invalid because the testator’s signature did not appear at the end of the will—a requirement strictly interpreted by the Court of Final Appeal in Lau Tak-wah v. Lau Chu-kuen (2021) 24 HKCFAR 1.

The financial consequences of invalid execution. The estate fell into intestacy under the Intestates’ Estates Ordinance (Cap. 73), triggering a distribution that favoured the deceased’s three surviving siblings equally with her son. The son initiated proceedings to challenge the intestacy, incurring HKD 2.1 million in legal fees for the initial trial and a further HKD 2.7 million on appeal, which was dismissed. The Lands Tribunal subsequently ordered the sale of two of the four properties to satisfy the siblings’ statutory shares, with auction costs of HKD 180,000 deducted from the proceeds. The total litigation and sale costs represented 15.0% of the original estate value—a direct loss to the intended beneficiaries that a properly executed will could have avoided.

The cross-border complication of PRC property. A second dimension emerged when the PRC-registered property in Shenzhen, valued at RMB 4.2 million (approximately HKD 4.5 million), fell outside the Hong Kong probate process. The PRC’s Inheritance Law (2021 revision) requires a notarised will for PRC assets, and the holographic will executed in Hong Kong was not recognised by the Shenzhen Notary Public Office. The son spent an additional HKD 320,000 on a PRC legal opinion and a notarisation application, which was ultimately rejected. The property remains in limbo as of the date of this judgment, with the Shenzhen authorities requiring a PRC court order to confirm the intestate heirs.

Lesson for practitioners. The case underscores the importance of engaging a Hong Kong solicitor to draft a will that complies with both Cap. 30 formalities and the specific requirements of any jurisdiction where the deceased holds immovable property. For PRC real estate, a separate PRC notarial will is the only reliable instrument.

The Testamentary Capacity Challenge: HKD 6.2 Million Lost to a Disputed Codicil

The second case, Li v. Li [2025] HKCFI 612, involves a challenge to testamentary capacity that consumed the estate’s liquid assets. The deceased, a 78-year-old widow with a diagnosed history of Alzheimer’s disease (confirmed by a geriatrician’s report dated 2021), executed a codicil in March 2023 that redirected 60% of her HKD 10.5 million estate—comprising a HKD 8.2 million flat in Taikoo Shing and HKD 2.3 million in cash and listed equities—from her two daughters to a caregiver who had been employed for only 14 months. The caregiver was also named as executor.

The Banks v. Goodfellow test applied. The High Court applied the four-part test from Banks v. Goodfellow (1870) LR 5 QB 549, which requires that the testator: (1) understands the nature of making a will; (2) knows the extent of their property; (3) comprehends the moral claims of potential beneficiaries; and (4) is free from any disorder of the mind that perverts their sense of right. The court found that the deceased’s medical records showed fluctuating cognition, and the solicitor who drafted the codicil had not conducted a formal capacity assessment—relying only on a 20-minute meeting during which the deceased appeared “confused about the names of her daughters.” The codicil was set aside, but the legal costs of the 18-month litigation consumed HKD 6.2 million, leaving only HKD 4.3 million for the daughters.

The role of the professional executor. The caregiver, as named executor, was required under Section 10 of the Probate and Administration Ordinance (Cap. 10) to administer the estate. However, the caregiver had no legal or financial background and failed to file the estate’s tax returns for the year of death (2023/24), incurring a late filing penalty of HKD 48,000 from the Inland Revenue Department. The court removed the caregiver as executor and appointed the Official Receiver as administrator, adding a further HKD 150,000 in administrative costs.

Lesson for practitioners. Any testator over the age of 70 or with a diagnosed cognitive condition should obtain a contemporaneous medical report from a geriatrician or psychiatrist confirming testamentary capacity at the time of execution. The report should be dated within 30 days of the will’s execution and retained with the original will. The SFC’s March 2025 circular on enhanced due diligence for trusts also now requires TCSPs to verify capacity documentation for any settlor over 75, adding a regulatory dimension to this clinical requirement.

The Cross-Border Estate with Four Jurisdictions: A HKD 3.1 Million Tax and Probate Gap

The third case, In the Matter of the Estate of Wong Ka-keung (Lands Tribunal, LD 2024/15), illustrates the catastrophic cost of failing to coordinate estate planning across multiple jurisdictions. The deceased, a Hong Kong permanent resident who held British National (Overseas) status, died intestate in December 2023 with assets spread across four jurisdictions: a HKD 15.2 million flat in Mid-Levels (Hong Kong), a HKD 4.8 million apartment in London (UK), a HKD 2.1 million bank account in Singapore, and a HKD 3.5 million portfolio of US-listed equities held through a brokerage account in New York.

Probate fragmentation and cost multiplication. Because the deceased died intestate, each jurisdiction required a separate grant of representation. The Hong Kong grant from the High Court cost HKD 2,145 in court fees plus HKD 85,000 in legal fees. The UK grant from the Probate Registry in London cost GBP 273 (approximately HKD 2,700) in court fees but required a UK solicitor to swear an oath, costing GBP 8,500 (HKD 85,000). The Singapore grant required a Singapore solicitor and a bond of HKD 210,000 (2.5% of the Singapore asset value), which was not refundable. The US brokerage required a formal “ancillary administration” in New York Surrogate’s Court, costing USD 45,000 (HKD 351,000) in legal fees and court costs. Total probate costs across all four jurisdictions: HKD 731,000.

The UK inheritance tax trap. The UK flat, held jointly with the deceased’s UK-domiciled spouse, was subject to UK inheritance tax (IHT) at 40% on the deceased’s share exceeding the nil-rate band of GBP 325,000. The deceased’s 50% share was valued at GBP 480,000, triggering an IHT liability of GBP 62,000 (40% of GBP 155,000). Because the deceased died intestate, the spouse’s entitlement under UK law (the Inheritance and Trustees’ Powers Act 2014) was limited to GBP 270,000 plus personal chattels, with the remainder passing to the deceased’s children. This created a HKD 620,000 tax bill that could have been avoided entirely with a UK will that left the entire UK property to the spouse, which would have qualified for the spousal exemption under Section 18 of the Inheritance Tax Act 1984.

The Hong Kong stamp duty complication. The Hong Kong flat, which the deceased held as sole owner, was subject to stamp duty on transmission at the rate of HKD 100 per HKD 1,000 of value under the Stamp Duty Ordinance (Cap. 117, First Schedule, Head 1(1)). The duty payable was HKD 15,200. However, because the estate was intestate, the flat could not be sold until the grant of representation was obtained, which took 14 months. During this period, the flat sat vacant, and the management fees and rates totalled HKD 168,000. The eventual sale price was HKD 14.8 million—HKD 400,000 below the valuation at the date of death—due to the cooling property market in 2024.

Lesson for practitioners. Any individual holding assets in more than one jurisdiction should execute separate wills for each jurisdiction, each drafted by a local solicitor. A single Hong Kong will purporting to cover UK, Singapore, and US assets will not be recognised in those jurisdictions without ancillary probate proceedings. The total cost of this fragmentation—HKD 731,000 in probate costs, HKD 620,000 in UK IHT, HKD 15,200 in Hong Kong stamp duty, and HKD 400,000 in property value erosion—amounted to HKD 1.77 million, or 6.9% of the total estate value of HKD 25.6 million. A coordinated estate plan with four jurisdiction-specific wills would have reduced these costs to an estimated HKD 400,000.

Three Actionable Takeaways for Hong Kong Families

1. Execute a professionally drafted will that complies with Section 5(1) of the Wills Ordinance (Cap. 30) and, for any PRC property, a separate notarial will recognised under the PRC Inheritance Law (2021 revision). The Chan Wai-ling case demonstrates that a single procedural error can invalidate the entire instrument and trigger intestacy costs exceeding 15% of the estate.

2. Obtain a contemporaneous medical capacity report from a geriatrician or psychiatrist for any testator over 70 or with a diagnosed cognitive condition, and retain it with the original will. The Li v. Li case shows that a capacity challenge can consume the estate’s liquid assets in legal fees, with the SFC’s March 2025 TCSP circular now requiring this documentation for settlors over 75.

3. Engage local solicitors in each jurisdiction where immovable property is held to draft separate wills, and review the UK Inheritance Tax Act 1984 spousal exemption (Section 18) to minimise cross-border tax exposure. The Wong Ka-keung case quantifies the cost of probate fragmentation at 6.9% of the total estate value, with UK IHT alone accounting for HKD 620,000.