🇬🇧UK tax residence

Concept

UK tax residence is a statutory status fixed for each tax year. It is not immigration residence, domicile, nationality, a bank address or wherever a client says the family base is. The tax year runs from 6 April to 5 April, and the Statutory Residence Test is applied separately to each one. The same broad logic that other systems reach through 183-day counts and a centre of vital interests is, in the UK, written into one mechanical test. Residence is the first gate to UK tax on worldwide income and gains, to FIG and OWR eligibility, and to long-term-resident inheritance tax.

From case law to statute

Before 6 April 2013 there was no statutory test. Residence turned on case law and HMRC's old IR20 practice, with elastic ideas like ordinary residence and a 'distinct break' from the UK. The result was litigated for years, the Gaines-Cooper line of cases being the best-known example, and advisers could rarely promise a clean answer. The SRT replaced that judgement call with arithmetic: count the days, test the ties, and the year resolves the same way for everyone. Certainty is the point of the regime, which is also why HMRC expects the day count to be documented rather than asserted.

The test

The SRT runs in a fixed order: automatic overseas tests first, then automatic UK tests, then the sufficient ties test. HMRC's RDR3 guidance makes 183 or more UK days conclusive of residence without looking at anything else. Below 183 days the analysis works through the overseas tests, then the UK tests, then the ties. It cannot start from the answer the client wants and fit the day count to it.

Counting days

A UK day is normally one where the person is in the UK at the end of the day, at midnight. Transit days can be ignored, and up to 60 days a year spent in the UK because of exceptional circumstances beyond the person's control, such as serious illness, do not count. The thresholds are not symmetrical. A leaver who was resident in any of the previous three years is automatically non-resident only below 16 days, then needs four ties between 16 and 45 days, three between 46 and 90, two between 91 and 120, and a single tie from 121 to 182. An arriver who was non-resident for the previous three years has more room: four ties bite only from 46 days, three from 91, and two beyond 120. The same itinerary can be safe for a new arriver and decisive for someone who has just left.

Scope and facts

The test reaches mobile executives, founders, retired HNWI, students, spouses, children and people with fragmented work patterns. The relevant facts are not only midnights. They include UK workdays, homes, family, available accommodation, prior residence, the 90-day history and the country tie for leavers. A travelling spouse can create a family tie even if another country is treated as the main base.

Split year and temporary non-residence

Split-year treatment is not a separate residence status. RDR3 explains that a person can be UK resident for the year yet taxed as if it splits into a UK part and an overseas part where a statutory case applies. Temporary non-residence has its own rules that can pull gains and certain income back into charge if the person returns within five years or so, so a short spell abroad does not always achieve what it promises. A departure can also trigger an exit tax in the origin or destination country, which is a separate question from the SRT. An investor leaving in September usually needs a split-year analysis, not a simple whole-year non-resident conclusion.

Consequences and treaty position

Residence opens the door to UK tax on worldwide income and gains, FIG eligibility, OWR, Self Assessment, trust and company anti-avoidance, and IHT residence counting. Non-residence normally removes foreign income from UK income tax, but UK-source income and UK property may remain in charge. Dual domestic residence is common: HMRC's dual residence manual (INTM154020) states that treaty non-residence can limit UK liability but does not override the fact of UK residence for domestic filing.

Residence after the 2025 reform

From 6 April 2025 domicile stopped driving UK personal tax, and residence now does almost all of the work. The remittance basis is closed to new claims and replaced by the four-year FIG regime: someone who arrives after ten consecutive non-resident years pays no UK tax on foreign income and gains for the first four years of residence, then moves to worldwide taxation. Inheritance tax became residence-based at the same time. A long-term resident, meaning someone UK resident in at least ten of the previous twenty tax years, is exposed to IHT on worldwide assets, and that status trails for between three and ten years after they leave. The SRT day count now decides more than income tax: it also runs the FIG clock and starts the IHT counter.

Evidence

Residence evidence includes travel records, passport stamps, flight logs, accommodation agreements, work calendars, employment contracts, school records, the residence of a spouse and children, board minutes and a contemporaneous day-count schedule. For treaty residence the file also has to support a permanent home, centre of vital interests, habitual abode and nationality. The same movements reach HMRC independently through CRS reporting, so a day count that does not match what banks and authorities report invites an enquiry. An enquiry tests the documents, not the memory.

Planning

Residence planning is legal modelling before conduct, not after-the-fact reconstruction. The client should model arrival and departure years, split-year cases, UK workdays, accommodation, family movements and treaty position before executing a relocation, a sale, a trust distribution or a company governance change.