The Statutory Residence Test, in force since 6 April 2013, decides UK tax residence for each tax year separately. Spending 183 days or more in the UK always makes someone UK resident. Below that, an automatic overseas test, an automatic UK test, or a sufficient ties test involving up to 5 connecting factors determines the outcome.
TL;DR · LAST REVIEWED 10 July 2026
- The 183-day automatic UK test has no exceptions: spend 183 days or more in the UK in a tax year (6 April to 5 April) and you are UK resident for that year regardless of any other factor.
- The automatic overseas tests can make someone non-resident on far fewer days: under 16 days if UK resident in any of the previous 3 tax years, or under 46 days if not UK resident in any of the previous 3 tax years.
- A third automatic overseas test covers full-time work abroad: fewer than 91 days in the UK and no more than 30 days working over 3 hours in the UK, with no significant break from overseas work.
KEY FACTS
- The 183-day automatic UK test has no exceptions: spend 183 days or more in the UK in a tax year (6 April to 5 April) and you are UK resident for that year regardless of any other factor.
- The automatic overseas tests can make someone non-resident on far fewer days: under 16 days if UK resident in any of the previous 3 tax years, or under 46 days if not UK resident in any of the previous 3 tax years.
- A third automatic overseas test covers full-time work abroad: fewer than 91 days in the UK and no more than 30 days working over 3 hours in the UK, with no significant break from overseas work.
- The sufficient ties test weighs 5 possible UK connections, family, accommodation, work, a 90-day tie, and a country tie, against day counts; the more ties held, the fewer UK days are allowed before residence is triggered.
- Up to 60 days a tax year can be disregarded for genuinely exceptional circumstances, such as sudden illness preventing departure, though this exclusion is applied narrowly by HMRC.
Why the Statutory Residence Test exists
Before 6 April 2013, UK tax residence was decided through a mix of case law and HMRC practice built around vague concepts of intention and habitual presence, which was widely criticised as unpredictable and heavily litigated. The Statutory Residence Test, SRT, replaced that with a mechanical, rules-based framework set out in HMRC's RDR3 guidance and the underlying legislation. It determines residence separately for each UK tax year, which runs 6 April to 5 April, meaning a person can be UK resident for one tax year and non-resident for the next, or vice versa, purely based on how that specific year's facts play out. Getting this right matters directly: UK tax residents are generally taxable on worldwide income and gains, while non-residents are generally taxed only on UK-source income, such as UK rental property or UK-based employment earnings for days worked in the UK.
The test is applied in a fixed sequence and stops at the first conclusive answer: first the automatic overseas tests, then the automatic UK tests, and only if neither is conclusive, the sufficient ties test. A UK day, for counting purposes, is generally any day where a person is in the UK at midnight, with a separate deeming rule that can, in narrow circumstances involving multiple ties and heavy UK work activity, count additional days even without a midnight presence.
The automatic overseas tests: the fastest route to certainty
Three tests can make someone automatically non-UK resident for a tax year, regardless of any other factor, provided one is met. The first applies to someone who was UK resident in one or more of the three tax years before the one being considered, and who spends fewer than 16 days in the UK in the year under consideration. The second applies to someone who was not UK resident in any of the previous three tax years, who spends fewer than 46 days in the UK. The third, generally the most relevant for UK citizens who have taken up genuine full-time employment abroad, requires working full time overseas for the tax year with no significant break, spending fewer than 91 days in the UK, and working more than three hours in the UK on no more than 30 days in that year. Full-time overseas work is generally assessed against a sufficient hours test, broadly averaging 35 hours a week across the year without a significant break in that pattern. Meeting any one of these three tests ends the analysis; the automatic UK tests and the sufficient ties test do not need to be considered.
The automatic UK tests, including the absolute 183-day rule
If none of the automatic overseas tests apply, the automatic UK tests are considered next. The clearest and most absolute is straightforward: spend 183 days or more in the UK in the tax year and that person is UK resident for the year, with HMRC explicit that there are no exceptions to this specific test. Two further automatic UK tests can trigger residence on considerably fewer days. The first, sometimes called the only or main home test, applies broadly where a person has a UK home available to them for a continuous period of at least 91 days, is present in that home on at least 30 days in the tax year, and either has no overseas home at all during that period or spends fewer than 30 days in any overseas home. The second covers full-time work in the UK, broadly working in the UK for 365 days or more with no significant break and more than 75% of working days falling in the UK. Meeting any one of these automatic UK tests, without also meeting an automatic overseas test, makes a person UK resident for the year, and the sufficient ties test does not need to be considered.
The sufficient ties test: days and connections combined
Where neither an automatic overseas test nor an automatic UK test gives a conclusive answer, residence is decided by combining the number of days spent in the UK with the number of qualifying UK ties held. There are five possible ties: a family tie, where a spouse, civil partner, cohabiting partner or minor child is UK resident; an accommodation tie, broadly having UK accommodation available for a continuous period of at least 91 days and spending at least one night there, or at least 16 nights if the accommodation belongs to a close relative; a work tie, generally working in the UK for more than three hours on at least 40 days in the tax year; a 90-day tie, having spent more than 90 days in the UK in either of the two tax years immediately before the one being considered; and a country tie, broadly where the UK is the country in which the person spends the most time in that tax year, which only needs to be considered by someone who was UK resident in one or more of the previous three tax years.
The test distinguishes between arrivers, someone not UK resident in any of the previous three tax years, and leavers, someone who was UK resident in at least one of them; leavers must consider all five ties including the country tie, while arrivers only need to consider the first four. The general pattern is that the more ties a person holds, the fewer days they can spend in the UK before becoming resident, and the exact day thresholds attached to each tie combination are set out in detailed tables in HMRC's RDR3 guidance rather than a single simple rule, so anyone close to a threshold should check the specific table for their arriver or leaver status rather than relying on a rough approximation.
Split year treatment and what non-residence does not mean
A tax year is not always wholly resident or wholly non-resident. Split year treatment allows a single tax year to be divided into a UK part and an overseas part where specific conditions are met, most commonly where someone leaves partway through the year to take up full-time work abroad, or where they meet other defined departure or arrival cases set out in the legislation. Where it applies, split year treatment is automatic in the sense that no separate application is required, but it must still be claimed on a Self Assessment tax return using the SA109 supplementary pages, with evidence retained to support the claim. Becoming non-UK resident, whether for a full tax year or the overseas part of a split year, does not mean UK tax stops entirely: UK-source income, such as rental income from a UK property or certain UK employment earnings, generally remains taxable, and a separate anti-avoidance rule on temporary non-residence can bring certain gains and dividends back into UK tax if someone returns to UK residence within five complete tax years of leaving. Given how narrow the margins in this test can be, particularly around the sufficient ties tables and the deeming rule, UK citizens planning a move abroad should keep a contemporaneous, evidenced log of every UK day and take professional advice before relying on a specific residence outcome.
RELATED GUIDES
DISCLAIMER
This article is editorial information, not immigration, legal, tax or investment advice. Rules, thresholds and fees change and should be verified against the official sources cited below before acting. Kael Tripton Ltd receives no fee, commission or referral payment in connection with any programme described on this page.
Frequently asked questions
How many days can I spend in the UK before becoming tax resident?
It depends on your ties and history, not a single number. Spending 183 days or more always makes you resident. Below that, the threshold ranges from as few as 16 days, if you have several UK ties and were recently UK resident, up to around 120 days with minimal ties, under the sufficient ties test.
Does leaving the UK to work abroad automatically make me non-resident?
Not automatically, but it can qualify you for split year treatment or an automatic overseas test if you meet specific conditions, most commonly working full-time abroad with fewer than 91 UK days and no more than 30 UK working days over 3 hours.
What counts as a UK day for the Statutory Residence Test?
Generally, any day you are in the UK at midnight. A separate deeming rule can, in narrow circumstances involving multiple UK ties and significant UK work activity, count additional days even without a midnight presence.
If I become non-UK resident, do I stop paying any UK tax?
No. Non-residents are still generally taxed on UK-source income, such as UK rental property or certain UK employment earnings. Only worldwide income and gains outside the UK fall outside UK tax once non-residence is established.
Can I split a single tax year between UK and non-UK residence?
Yes, in defined circumstances, through split year treatment, most commonly where someone leaves partway through the year for full-time overseas work. It applies automatically where the conditions are met but must still be claimed on a Self Assessment return using the SA109 pages.
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