UK Domicile and Its Narrowed Role
Written and reviewed by the Non-Dom Accountants editorial team. Last reviewed 28 July 2026.
Domicile is the general law idea of where a person truly belongs, distinct from residence. For decades it decided who could use the remittance basis and whose worldwide estate fell inside UK inheritance tax. After 6 April 2025 it no longer performs either role.
This guide explains domicile of origin, choice and dependence, and where the concept still bites during the transition. Because the old regime it underpinned has now ended, read it alongside the 2025 abolition of the non-dom regime, and see our work on non-dom inheritance tax for how estates are assessed now.
Domicile of Origin, Choice and Dependence
A domicile of origin is acquired at birth, usually from the father. A domicile of choice replaces it when a person settles in a new country with the intention to remain there indefinitely. A domicile of dependence applies to those whose domicile follows another person, such as a child.
Domicile is sticky. A domicile of origin revives if a domicile of choice is abandoned and no new one is acquired, which is why it was so often disputed under the old rules.
Why Domicile Governed the Old Regime
Under the pre-2025 system, a non-UK domiciled resident could elect for the remittance basis and could keep a non-UK estate outside inheritance tax until deemed-domicile rules caught up with them. Domicile was therefore the pivot of the whole regime.
That pivot has been removed. The reform replaced a status people were born with by a test based on how long they have actually lived in the UK.
Domicile No Longer Decides Inheritance Tax
From 6 April 2025 inheritance tax turns on long-term residence, not domicile. A person who has been UK resident for at least ten of the last twenty tax years is a long-term resident, and their worldwide estate is in scope. HMRC's guidance on the residence-based system for inheritance tax sets out the detail.
The nil-rate band of £325,000 and the 40% standard rate are unchanged. What has changed is the gateway that decides whose foreign assets are counted at all.
Where Domicile Still Matters in the Transition
Domicile has not become irrelevant overnight. It helps decide who qualifies for capital gains tax rebasing, because rebasing is offered to former remittance-basis users who were not UK-domiciled or deemed-domiciled by 5 April 2025. It also remains a factor in how some double tax treaties allocate taxing rights.
So the concept keeps a narrower, transitional function even though it no longer decides the basis of assessment or the reach of inheritance tax.
How the Reform Reframed the Concept
The government's own account, in its paper on reforming the taxation of non-UK domiciled individuals, frames the shift as a move from a status-based system to a residence-based one.
For most people the practical takeaway is simple. Where you have lived, and for how long, now matters more than the older question of where you belong.