The UK's four-year window: why ex-non-doms are restructuring through Singapore
Britain abolished the non-dom regime and, almost unnoticed in the noise, broke the structure that generations of international families were advised into: the offshore trust. What replaced domicile is a system of clocks — a four-year relief window, a ten-of-twenty-years inheritance test, a repatriation discount that steps up in 2027 — and families are planning against the clocks rather than the headlines. For wealth with any Asian orientation, the vehicle that fits the new mechanics is not another trust. It is a fund company.
The short answer
Since 6 April 2025 the UK taxes by residence, not domicile. Three mechanics now drive every planning conversation. The FIG regime: four tax years of full relief on foreign income and gains for arrivals who spent the prior decade outside the UK — a defined window in which offshore structures can be built cleanly. The long-term resident test: ten of the last twenty years' UK residence puts worldwide assets inside inheritance tax — with a tail that follows leavers for years. And the one the headlines missed: offshore trusts lost protected-settlement status, so a long-term-resident settlor's non-UK trust now sits in the relevant-property regime — 20% going in above the nil-rate band, up to 6% every ten years, charges coming out. The classic answer is broken, which is why the restructuring flow favours non-trust wrappers — and for families whose next chapter is Asian, that means a Singapore VCC: a company doing the trust's old jobs without being a settlement, inside the jurisdiction their portfolio is heading anyway.
The clocks, precisely
| Clock | The rule | The planning consequence |
|---|---|---|
| FIG window | 4 tax years of foreign income & gains relief; requires 10 prior years non-resident; pre-2025 arrivals get the remainder of their window | The clean period to establish offshore structures and realise gains — it does not pause and does not renew |
| TRF ladder | Pre-April-2025 foreign income/gains designated at 12% (2025-26, 2026-27), then 15% (2027-28), then gone | Money that will ever come onshore is cheapest designated before April 2027 |
| Long-term resident test | 10 of the last 20 tax years UK-resident → worldwide IHT exposure, persisting for a period after departure | Leavers must count backwards: the IHT tail shapes when estates settle, not just where people live |
| Trust charges | Protected settlements abolished; relevant-property regime applies to long-term residents' offshore trusts | Existing trusts need reviewing; new trusts are rarely the answer they were |
On the exodus numbers a note of honesty our competitors skip: the famous millionaire-headcounts have been publicly disputed, and their publisher stopped printing precise figures in 2026. The verifiable signals are quieter but real — Singapore reports UK-linked applications up 15% year on year — and UK policy is visibly reactive: an exit tax was floated and shelved within months, and softening of the IHT reach has been mooted. Families are rightly planning on enacted mechanics, not on either direction of headline.
Why the replacement is a fund company, not another trust
Strip the trust of its IHT shield and ask what it still did: consolidated the family's assets under governance, separated branches and generations, kept ownership private, managed succession without probate in every jurisdiction. A VCC does each of those jobs in corporate form. An umbrella holds ring-fenced sub-funds per branch, strategy or generation; shares pass by transfer and share-class design rather than trust deeds; the register is not public; capital moves at net asset value without capital-reduction mechanics; and — decisively — it is not a settlement, so the entry, decennial and exit charges that now haunt offshore trusts simply have no purchase on it. Add the Singapore layer: no capital gains tax, the 13O/13U exemptions where conditions are met, ninety-plus treaties working on Asian income, and an ecosystem — family offices, licensed managers, administrators — that processes exactly this arrival profile weekly.
Who this actually fits: the family leaving the UK whose wealth is globalising eastward; the FIG-window arrival building structures during the four clean years; the returning Asian family unwinding a UK chapter. Who it does not fit without heavy UK advice: anyone remaining UK-resident long term — the transfer-of-assets-abroad and settlements legislation reach UK residents regardless of wrapper, and the IHT tail follows recent leavers. The structure works with proper UK counsel and honest sequencing, never instead of them.
The sequencing that uses the clocks
- Inside a FIG window: establish the Singapore vehicle and realise/reorganise foreign gains within the relief years — the cheapest restructuring window UK law has offered this cohort in decades.
- Holding pre-2025 offshore money: run the TRF arithmetic before April 2027, while the 12% rate lasts, on anything that will ever be wanted onshore.
- Planning departure: count the ten-of-twenty test and its tail backwards from intended non-residence; structure the Singapore landing — vehicle, banking, the private-banking relationships — before the move, and consider whether the family's scale points at the GIP or simply at residence by employment.
- Sitting in an old offshore trust: have it reviewed now — the ten-year charge clock is running whether or not anyone looks.
Restructuring out of the old non-dom architecture?
Tell us where the family is on the clocks — FIG window, planned departure, an existing trust — and how much of the future is in Asia. We'll walk you through what a Singapore structure does and doesn't solve for your position, and connect you with MAS-licensed managers who work alongside UK counsel on these moves.
Speak to a specialist →What replaced the UK non-dom regime?
From 6 April 2025, domicile disappeared from UK tax and a residence-based system took over. New arrivals who were non-UK-resident for the previous ten years get the FIG regime — four tax years of full relief on foreign income and gains, regardless of remittance. After that, worldwide taxation applies. Inheritance tax also became residence-based: once someone has been UK-resident for ten of the last twenty tax years they are a 'long-term resident' with worldwide assets in scope — and that exposure follows them for years after leaving.
What happened to offshore trusts for UK residents?
They lost their shield. From 6 April 2025, protected-settlement status was abolished: a settlor who is a long-term UK resident now faces the relevant-property regime on non-UK trust assets — an entry charge of 20% above the nil-rate band, up to 6% every ten years, and exit charges. The structure that generations of non-doms were advised into now carries its own recurring inheritance-tax cost, which is why so much restructuring advice now points at non-trust wrappers.
Why does a Singapore VCC suit ex-UK wealth?
Because it is a company, not a settlement — so the punitive trust regime simply does not apply to it — and because it does the jobs the trust used to do: consolidated family holding, ring-fenced sub-funds for branches or strategies, a private register, succession through share classes rather than trust deeds. For families leaving the UK or inside their FIG window, it provides a Singapore-resident, treaty-connected vehicle for the global portfolio, with the 13O/13U exemptions where conditions are met. UK anti-avoidance rules still apply to UK residents — the structure works with proper UK advice, not instead of it.
What is the Temporary Repatriation Facility and why does its timing matter?
The TRF lets former remittance-basis users bring pre-April-2025 foreign income and gains to the UK at a discounted flat rate: 12% for the 2025-26 and 2026-27 tax years, rising to 15% in 2027-28 before ending. It is one of the few genuine use-it-or-lose-it dates in the new system — money that will ever come onshore is materially cheaper to designate before April 2027 than after.
Are Britain's wealthy really leaving in large numbers?
There is a documented outflow, but treat the famous headline numbers with care: the widely-cited millionaire-migration counts have been publicly challenged, and the firm behind them stopped publishing precise figures in 2026. What is verifiable: the mechanics that drive departures are real and dated, Singapore reports UK-linked applications rising, and UK policy remains volatile — an exit tax was floated and shelved within months. Plan on the rules, not the headlines.