How Does Domicile of Choice Work in 2026/27? UK Tax Guide

For decades, establishing a “domicile of choice” was the cornerstone of international tax planning in the UK. However, if you are advising clients in the 2026/27 tax year, you must understand a fundamental legislative shift: the UK government removed the concept of domicile from the tax system on 6 April 2025.

While the general legal definition of domicile remains relevant for succession and family law, UK taxation now relies entirely on a statutory residence-based regime.  This guide explains exactly how domicile of choice works under common law, and how the new 2026/27 statutory tests apply to your clients instead.

The Common Law Definition: Acquiring a Domicile of Choice

Although obsolete for modern tax purposes, the common law test for domicile of choice dictates how historical trust structures and pre-2025 tax liabilities are judged.

Every individual is born with a domicile of origin, which adheres to them unless it is displaced by satisfactory evidence that they have acquired a new domicile of choice.  Acquiring a domicile of choice requires the combination of two strict elements:

1. Residence: The individual must establish a physical presence in a country as “an inhabitant of it”, excluding casual visitors.
2. Intention: The individual must form the intention to reside there permanently and indefinitely.

The burden of proof always rests heavily on the party seeking to establish that a domicile of choice has been acquired.  Tribunals conduct a multi-factorial assessment, assigning weight to the taxpayer’s conduct before, during, and after the alleged acquisition date.

The Intention Test and Contingencies

The courts have provided strict parameters on what constitutes a permanent intention. Lord Westbury established in Udny v Udny that residence must be freely chosen, rather than dictated by external necessities such as the duties of an office or the relief of illness.

“Domicil of choice is a conclusion or inference which the law derives from the fact of a man fixing voluntarily his sole or chief residence in a particular place, with an intention of continuing to reside there for an unlimited time.”

Crucially, tribunals assess future contingencies to test this intention. If a person intends to return to their country of birth upon a “clearly foreseen and reasonably anticipated contingency” (such as the end of a specific employment contract), they lack the requisite intention, and their domicile of choice fails.  Conversely, if the individual only harbours a “vague possibility” of returning—such as a desire to return if they win the lottery—this state of mind remains consistent with acquiring a domicile of choice.

The 2026/27 Tax Reality: The Shift to Tax Residence

From 6 April 2025, the UK government officially removed the outdated concept of domicile from the tax system to implement a residence-based regime designed to attract global talent.

For income tax and capital gains tax, the remittance basis of taxation (which shielded non-UK domiciled individuals from UK tax on unremitted foreign income) has been abolished.  In its place, the government introduced a 4-year Foreign Income and Gains (FIG) regime.  Qualifying new residents can now bring foreign income to the UK tax-free during their first four years of residence, completely disregarding their common law domicile status.

Inheritance Tax (IHT): The “Long-Term UK Resident” Test

The most profound change affects Inheritance Tax (IHT). Historically, a non-UK domiciled individual was only subject to IHT on their UK assets (their foreign assets were “excluded property”). In 2026/27, domicile is completely irrelevant to IHT.

Section 44 of the Finance Act 2025 replaces the domicile test with the “long-term UK resident” test.  Under these new rules, an individual’s worldwide estate falls within the scope of UK IHT if they meet the statutory definition of a long-term UK resident.

An individual is a long-term UK resident at all times in a tax year if they were UK resident for at least 10 of the previous 20 tax years.  Once an individual triggers this 10-year threshold, they remain within the UK IHT net globally until they successfully shed their long-term resident status. To lose this status, they must become non-UK resident for 10 consecutive tax years (or a shorter required number of years if they were resident in the UK for fewer than 20 years prior to leaving).

Transitional Provisions

For individuals attempting to determine their status for events occurring before 6 April 2025, the repeal of the old deemed domicile rules is disregarded.  Furthermore, specific transitional protections exist for “pre-commencement emigrants”. An individual who was not domiciled in the UK on 30 October 2024 and has not been UK resident in the tax year 2025-26 or the relevant current tax year may be treated as not being a long-term UK resident if they meet strict historical non-residence conditions.

Spousal Elections in 2026/27 (Section 267ZC)

Under the old regime, a non-UK domiciled individual could elect to be treated as UK domiciled (under section 267ZA of the Inheritance Tax Act 1984) to benefit from the unlimited spousal IHT exemption if their spouse was UK domiciled.

Because domicile is obsolete, Schedule 13 of the Finance Act 2025 introduced a new equivalent election. Under the new section 267ZC of IHTA 1984, an individual can now elect to be treated as a “long-term UK resident” if, within the 7 years prior to the election, they had a spouse or civil partner who was a long-term UK resident.

Once made, this lifetime election cannot be revoked.  However, the election automatically ceases to have effect if the electing person is subsequently not resident in the UK for a period of 10 successive tax years.

Summary Table: Domicile vs. Residence (2026/27)

Next steps for research: Audit the historic residence records of all internationally mobile clients to map their exact day counts over the previous 20 tax years, as this data—rather than their subjective intentions or common law domicile of choice—now exclusively governs their worldwide Inheritance Tax exposure under the 2026/27 rules.