The Multi-Jurisdictional Estate Problem
A principal with a primary residence in London, a family office in Singapore, real estate in Dubai, and investment accounts in Switzerland does not have an estate planning problem — they have several, simultaneously. Each jurisdiction applies its own succession laws, forced heirship rules, and tax treatment to assets located or deemed located within its borders.
Without deliberate cross-border structuring, wealth built across decades can be fragmented, taxed multiple times, or transferred to unintended beneficiaries under foreign inheritance rules the principal never considered.
Forced Heirship: The Silent Constraint
Many civil law jurisdictions — France, the UAE, Saudi Arabia, and parts of Latin America — impose forced heirship rules that reserve a fixed portion of an estate for specific heirs regardless of testamentary intent. A principal who believes their will governs asset distribution may find that local law overrides it for assets sited in those jurisdictions.
Common mitigation approaches include holding assets through structures domiciled in common law jurisdictions, using lifetime trusts to remove assets from the estate before succession rules apply, or selecting jurisdictions with international succession regulation compliance (EU Succession Regulation 650/2012 offers some flexibility for EU-resident principals).
Situs Rules and Asset Location
Each asset class has a legal situs — the jurisdiction where it is deemed to be located for inheritance and tax purposes. Real property sits where it stands. Listed securities are typically sited at the exchange or custodian location. Shares in private companies follow incorporation jurisdiction. Cash and deposits are generally sited at the bank’s domicile.
UHNW principals and their advisers must map every asset class to its situs jurisdiction, then overlay local succession rules and tax treatment. The result is a matrix of obligations that often reveals structural inefficiencies — assets held directly that would be better held through a trust or holding company in a more favourable jurisdiction.
The Role of International Trusts and Holding Structures
A well-designed holding structure interposes a trust or foundation between the principal and their underlying assets. Because the legal owner is the trust rather than the principal, the assets typically fall outside the principal’s taxable estate in jurisdictions that recognise the trust concept — though anti-avoidance rules in the principal’s country of residence may claw back assets if the transfer was not genuinely irrevocable.
Jurisdictions popular for holding structures include the Cayman Islands, BVI, Jersey, Guernsey, and Liechtenstein, each offering different trust law nuances, political stability, and treaty access. The selection depends on the principal’s residency, the asset types involved, and the intended beneficiary jurisdictions.
Governing Law Clauses and Forum Selection
Cross-border wills and trust deeds should explicitly specify governing law and dispute resolution forum. Without clear governing law clauses, courts in multiple jurisdictions may assert jurisdiction, leading to parallel proceedings, inconsistent outcomes, and significant legal costs.
Many UHNW principals maintain separate wills for each major jurisdiction where they hold assets — an English will for UK assets, a UAE will for Middle Eastern property, a Singapore will for Asian holdings. Coordinating these instruments to avoid conflict while ensuring comprehensive coverage requires specialist multi-jurisdictional legal counsel.
Tax Treaty Navigation
Estate and inheritance tax treaties are far less common than income tax treaties. The UK has bilateral estate tax treaties with only a handful of countries. Most principals rely on unilateral relief provisions — foreign tax credits or exemptions — rather than treaty protection.
Where treaties do exist, careful analysis of domicile definitions is essential. Treaty domicile often differs from common law domicile, creating planning opportunities — or traps — for principals who have moved between jurisdictions.
Succession Planning as a Living Process
Cross-border estate plans are not static documents. Changes in residency, asset location, family circumstances, and tax law require ongoing review. A principal who relocates from the UK to Switzerland changes their domicile profile materially, potentially triggering Swiss inheritance tax exposure while removing UK inheritance tax liability — or vice versa, depending on the specifics.
Annual reviews with a coordinated team of tax advisers, trust lawyers, and family office professionals are the standard for estates of material complexity. Hype Luxury works with principals and their advisory teams to ensure the full picture is considered.
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