Family office in the Cayman Islands: tax-neutral holding, fund and fiduciary architecture with a defined regulatory perimeter

Cayman is chosen less as a place to live than as a neutral jurisdiction for holding, investment and fiduciary vehicles: no direct taxes, English common law with final appeal to the Privy Council, a specialist Financial Services Division of the Grand Court and the deepest offshore funds industry. It fits families who already invest through Cayman funds, who hold assets across several countries, or who want a neutral top holding layer for family branches living in different places. The investment team itself usually sits onshore, in London, New York, Singapore or Dubai, with Cayman holding the vehicles; US-connected families need particular care with US trust, PFIC and CFC rules. The trade-offs are higher professional costs than smaller centres and the need to show that decisions are genuinely taken where the structure claims.

The regulatory question turns on the Securities Investment Business Act (2020 Revision) (SIBA). Until 2020 single family offices were listed among non-registrable persons, so they sat outside CIMA's prudential supervision. The Securities Investment Business (Amendment of Schedule 2A and Repeal of Schedule 4A) Order, 2020, gazetted on 20 August 2020, removed that exemption. SIBA still defines a single family office as an entity or arrangement formed in Cayman by a single family to conduct securities investment business for that family without holding itself out to the public. An SFO is not automatically caught: it must register or be licensed only if it actually carries on securities investment business, such as dealing, arranging, managing or advising on securities, in the course of business. A vehicle simply investing its own assets may fall outside, while an entity managing portfolios for several family members or entities is more likely to be inside. Those within scope can usually be registered persons, rather than full licensees, where they serve group entities, high net worth or sophisticated persons; registered persons must meet minimum director requirements, appoint an MLRO, deputy MLRO and AML compliance officer, and notify CIMA of material changes within 21 days.

The fiduciary layer is typically a private trust company. Under the Banks and Trust Companies Act and the Private Trust Companies Regulations, a PTC that carries on only connected trust business (for settlors and contributors connected by family relationship or group membership, and without soliciting the public) can register with CIMA without a trust licence or prior approval. It must have its registered office at a licensed trust company, at least one natural-person director, the words 'Private Trust Company' or 'PTC' in its name, and file an annual declaration by 31 January. Its shares are often held by a STAR trust, a Cayman trust regime that permits non-charitable purposes and perpetual duration and gives enforcement rights to a named enforcer rather than beneficiaries, or by a foundation company under the Foundation Companies Act, 2017, which needs no members.

Funds legislation also matters. CIMA guidance on the Private Funds Act treats single family offices as non-fund arrangements, so a family vehicle investing family capital does not register as a private fund; once capital is accepted from non-family investors, the Mutual Funds Act or Private Funds Act may apply. The Beneficial Ownership Transparency Act came into force on 31 July 2024 and brought PTCs and many private wealth companies into scope. From 28 February 2025, journalists, civil society organisations and counterparties with a legitimate AML/CFT interest can apply for limited access to beneficial ownership details, subject to protection orders for individuals at serious risk. There is still no public register.