Changing Your Domicile of Choice: Legal Requirements and HMRC Risks

Domicile is one of the most consequential — and most misunderstood — concepts in UK tax planning. Unlike tax residence, which can be established or broken by counting days, domicile is a legal concept rooted in personal intention and connection to a country. It determines whether UK inheritance tax applies to your worldwide estate. Getting it right can save substantial sums; getting it wrong — or failing to defend a change — can expose an estate to a tax liability the deceased believed they had eliminated.

What Domicile Is (and Is Not)

Domicile is a legal concept originating in private international law, used to determine which country's law governs matters such as succession to movable property. For UK tax purposes, an individual's domicile determines:

• Whether worldwide assets are within the scope of UK inheritance tax (IHT), or only UK-situated assets;
• The availability of certain CGT and income tax reliefs and elections;
• Historically (until April 2025), access to the remittance basis for non-UK income and gains.

Domicile is distinct from nationality and from tax residence. A French national who has lived in the UK for 25 years and intends to stay permanently is almost certainly UK domiciled, regardless of their passport.

There are three types of domicile:

• Domicile of origin: acquired at birth (usually the father's domicile at birth, or the mother's if the parents were unmarried).
• Domicile of dependency: for minors, follows the parent's domicile.
• Domicile of choice: acquired by an adult who takes up residence in a country with the intention of making it their permanent home.

A domicile of origin is remarkably persistent. It does not disappear simply because a person moves abroad; it revives if a domicile of choice is subsequently abandoned without another being acquired.

Acquiring a Domicile of Choice

To acquire a domicile of choice in a new country, two elements must coexist:

1. Residence in that country: the individual must actually live there, not merely visit.
2. Intention to reside permanently: the individual must intend to make that country their permanent or indefinite home, without any present intention of leaving.

The intention element is assessed subjectively and at the relevant point in time. Courts and HMRC look at the totality of circumstances: what the individual said, did, and arranged. Relevant evidence includes:

• Where the individual owns property and to what standard it is maintained;
• Where family members live;
• Where the individual is buried or has expressed a wish to be buried;
• Business and financial connections;
• Club memberships, social and cultural affiliations;
• Expressed statements of intention (though these carry less weight than conduct);
• Whether they retain strong ties to the domicile of origin country (a UK property maintained for visits, instructions to be buried in the UK, continued active management of UK-situated business interests).

Abandoning a UK Domicile of Choice

An individual who acquired a UK domicile of choice (e.g. a foreign national who moved to the UK, built a life there, and came to regard it as home) can abandon it by ceasing to reside in the UK with the intention of not returning permanently. Both elements — physical departure and abandonment of intention — are required.

Abandoning a UK domicile of origin is more difficult, because the domicile of origin does not simply lapse; it revives in the absence of a valid domicile of choice. A UK-born individual who moves to Spain and establishes a new domicile of choice there has successfully displaced their UK domicile of origin — but only for as long as the Spanish domicile of choice is maintained. If they later leave Spain intending to roam, the UK domicile of origin revives until they settle elsewhere with sufficient intention.

Evidence Required

HMRC can challenge domicile claims, particularly where large estates are involved. Common evidence gathered in enquiries includes:

• Correspondence (personal and professional) evidencing statements about home, plans, and intentions;
• Medical and social records;
• Location of close family;
• Property ownership and maintenance records;
• Investment account jurisdictions;
• Which country's news, politics, sport, and culture the individual engaged with;
• Funeral and burial instructions;
• Preparation of wills (particularly whether they reference the law of the new domicile country);
• Statements made to banks, insurers, and other institutions.

Documentary evidence assembled contemporaneously — a letter to a solicitor setting out one's intention to settle permanently in the new country, a will drafted under the law of that country, property purchased as a permanent home — is far more persuasive than statements made in retrospect when a domicile claim is being challenged.

HMRC Challenge Risk

HMRC's approach to domicile challenges has become more robust. The department has specialist units experienced in reviewing domicile claims on death (and sometimes during lifetime). The burden of proof in IHT matters rests with the taxpayer's estate, not with HMRC: the estate must demonstrate that the deceased had acquired and maintained a non-UK domicile.

Challenges are most common where:

• The deceased maintained significant UK property or financial assets;
• There are UK family members who stood to inherit;
• The change of domicile was proximate to a large anticipated IHT event (e.g., made shortly before death or while terminally ill);
• The domicile of choice country has weak legal ties to the deceased (property rented rather than owned, few social connections, no cultural ties).

Professional advisers increasingly recommend that individuals seeking to change domicile document their intention formally — via letters of wishes, a new will, and contemporaneous correspondence — and maintain a regular record of why they regard the new country as home.

The IHT Tail for Former UK Domiciliaries

Even after a UK domicile has been successfully abandoned, UK IHT exposure does not end immediately. Important: the rules governing this tail changed substantially from 6 April 2026. The old statutory concept (in IHTA 1984 s267A) was based on the deemed domicile test — individuals who had been UK domiciled for at least 15 of the 20 preceding tax years. From 6 April 2026, that test has been replaced by a residence-based Long-Term Resident (LTR) test: individuals who have been UK-resident for 10 or more of the preceding 20 tax years are subject to UK IHT on worldwide assets. The LTR test is determined by residence, not domicile.

Under the post-2026 rules, an individual who qualifies as a Long-Term Resident at the date they leave the UK remains subject to UK IHT on worldwide assets for 10 years after their departure. An individual who has been UK-resident for fewer than 10 of the last 20 years retains a shorter or no post-departure IHT tail on non-UK assets. UK-situated assets remain within the scope of UK IHT indefinitely, regardless of domicile or residence status.

This tail (commonly described as the "10-year IHT tail") applies to anyone who has crossed the LTR threshold. During this period, it is worth considering:

• Whether life insurance written in trust can hedge the residual IHT liability;
• Whether gifting during the tail period — using the normal expenditure out of income exemption or the PET rules — can reduce the taxable estate;
• Whether UK-situated assets should be disposed of or restructured.

Deemed Domicile Versus Domicile of Choice

Deemed domicile is a separate, statutory concept introduced to capture long-term UK residents who retain a non-UK domicile of origin. Under IHTA 1984 s267 and its successors:

• An individual who was resident in the UK for at least 15 of the 20 tax years ending with the year of the chargeable event was treated as UK domiciled for IHT purposes.
• This is a legal fiction — deemed domicile exists only for IHT (and previously, for the non-dom remittance basis rules) and does not affect domicile under private international law.

Following the April 2025 non-dom reform, the deemed domicile concept has been substantially replaced by a new residence-based test for IHT purposes. The post-2025 rules are complex and transitional provisions apply. Individuals who were previously protected by non-dom status for IHT purposes should take specific advice on their position under the new framework.

Practical Steps

If you are considering changing your domicile:

1. Engage a specialist tax solicitor or barrister with domicile expertise — not just an accountant.
2. Document your intention clearly and contemporaneously at the point of departure.
3. Execute a new will under the law of your intended new domicile country.
4. Establish genuine substance in the new country: permanent housing, financial ties, and social connections.
5. Review UK asset holdings and model IHT exposure throughout the tail period.
6. Do not retain excessive UK connections — club memberships, social engagements, and maintained UK property all count against a clean break.

How Global Investments Can Help

Domicile planning requires deep expertise across both English law and the legal system of the new intended domicile country. Our wealth team works alongside specialist domicile barristers and cross-border tax solicitors to assess the strength of a change, model the remaining IHT exposure, and implement structures that reduce risk during the transition period. These are not decisions to take lightly or without qualified legal advice; outcomes in enquiries depend heavily on the strength of the evidential record built over years. Contact us to discuss your position in confidence.