UK Inheritance Tax Reform 2025: What British Expats in Singapore Must Know

Major changes to inheritance tax (IHT) rules for non-domiciled individuals will take effect from 6 April 2025. For British expats in Singapore, the end of the domicile-based regime brings both new risks and new opportunities for cross-border estate planning.

A Fundamental Shift: From Domicile to Long-Term Residence

British citizens living abroad have long relied on their non-UK domicile status to shield overseas assets from UK inheritance tax. But from April 2025, the UK will move to a residence-based inheritance tax system. Under the new rules, long-term UK residents—defined as those who have been UK tax resident for at least 10 of the past 20 years—will become liable to UK inheritance tax on their worldwide assets, regardless of domicile.

This shift represents a significant acceleration of exposure to IHT. Currently, non-doms become “deemed domiciled” after 15 years of UK residence. Under the new rules, exposure begins after 10 years.

Why British Expats in Singapore Should Pay Attention

For British expats in Singapore who may still have ties to the UK—through family, property, or the possibility of returning in the future—the implications are profound:

– If you return to the UK even temporarily for work, family, or retirement, and spend 10 out of 20 years as a UK resident, you’ll become a long-term resident and subject to UK IHT on global assets.

– Even after leaving the UK, your worldwide assets can remain within the scope of UK IHT for up to 10 years—a period referred to as the inheritance tax tail.

– Existing trust structures will also face new scrutiny. Trusts funded by a settlor who is a long-term UK resident may now be within the IHT net, even if the trust holds non-UK assets.

The Inheritance Tax Tail: Planning Your Exit from the UK

The new rules create a graduated “IHT tail” after an individual ceases UK residence:

– If you were UK resident for 10–13 years, the IHT tail is 3 years.

– Each additional year of residence adds another year of exposure, up to a maximum tail of 10 years.

Transitional relief will be available for non-doms who are non-resident in the 2025/26 tax year and do not return. These individuals will benefit from a fixed 3-year tail, even if they had been resident for longer before April 2025.

However, to qualify, individuals must still prove they are non-UK domiciled under common law as of 30 October 2024—a complex and sometimes contentious matter requiring careful documentation and potentially legal opinion.

Trusts No Longer Offer Full Protection

Historically, trusts have been the cornerstone of estate planning for British non-doms, including many British expats in Singapore. But the new rules impose IHT charges on non-UK trusts if the settlor is a long-term resident at the time of a chargeable event—such as the 10-year anniversary of the trust or a capital distribution.

Two trust regimes now come into focus:

1. Relevant Property Regime – Applies a charge of up to 6% every 10 years, even on foreign assets, if the settlor is a long-term resident.

2. Gift with Reservation of Benefits (GWRB) – If the settlor retains benefit from the trust, the entire trust may be taxed at up to 40% on death.

There is partial grandfathering for trusts settled before 30 October 2024, but only for GWRB purposes—not for relevant property charges.

Estate Planning Implications for British Expats in Singapore

1. Avoiding Long-Term Resident Status

If you intend to return to the UK temporarily, be aware that spending even part of a 10th tax year in the UK will classify you as a long-term resident under the new rules. Consider limiting UK tax residence to no more than nine years in any 20-year window to avoid global IHT exposure.

2. Using the Transition Period Wisely

The window before 6 April 2025 is crucial. Individuals should:

– Finalize trust arrangements before 30 October 2024 to take advantage of partial grandfathering.

– Consider making lifetime gifts of excluded property to family members. Gifts made more than 7 years before death can fall outside the IHT net.

– Revisit existing wills, ensuring they are aligned with both UK law and the laws of Singapore or other jurisdictions where you hold assets.

3. Insurance as a Liquidity Solution

Some expats may choose to obtain life insurance to meet anticipated IHT liabilities. Given the cross-border nature of many estates, ensure that insurance is held in a tax-efficient manner—possibly via a Singaporean or offshore trust—to prevent policy proceeds from falling into the UK IHT net.

How Estate Treaties and Domicile Still Matter

While the new rules diminish the relevance of domicile in domestic UK tax law, the UK’s estate tax treaties with certain countries—including India, the U.S., France, and Pakistan—still rely on domicile to allocate taxing rights. Unfortunately, Singapore has no estate tax treaty with the UK, so British expats in Singapore are not protected by treaty in this respect.

Even so, if a British expat in Singapore is non-UK domiciled under common law, and has been non-resident in the 2025/26 tax year, they may qualify for the three-year tail and avoid the long-term resident regime—assuming proper documentation and legal positioning.

Relief on Business and Agricultural Property to Be Capped

From 6 April 2026, existing 100% reliefs for business and agricultural property will be capped at £1 million per estate. Beyond that, only 50% relief applies. Many British expats maintain farms, private companies, or property interests overseas—these holdings may now face effective IHT rates of 20% (or 3% for trustees) on value exceeding the cap.

What Should You Do Now?

✅ Immediate Action Points for British Expats in Singapore:

– Review your UK tax residency history and project your UK exposure over the next 20 years.

– Engage a specialist adviser to assess your domicile status under common law before 30 October 2024.

– Reassess your trust structures—particularly those established for succession or tax planning.

– Evaluate gifting strategies for excluded property, particularly where assets can be transferred without disrupting your broader wealth strategy.

– Review estate planning documents and international wills to ensure alignment with the new rules and local law.

Conclusion: Strategic Planning is No Longer Optional

For British expats in Singapore, the 2025 reforms represent a fundamental change in the UK tax landscape. The shift to a residence-based IHT regime closes a long-standing planning path for non-domiciled individuals. The days of indefinite protection through offshore trusts and permanent non-dom status are numbered.

Instead, proactive, international, and coordinated estate planning will be critical. Understanding the interaction between UK residence, domicile, and trust law—and how this plays out across borders—is now a priority for British expatriates serious about preserving wealth across generations.

If you would like information on any of the above areas or any other area of financial planning, please contact:

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