The UK Statutory Residence Test: A Complete Technical Guide

The UK Statutory Residence Test (SRT), introduced by Finance Act 2013, replaced the previous non-statutory residence rules with a codified, objective framework. For internationally mobile individuals — whether leaving the UK, returning to it, or managing time between multiple countries — understanding the SRT in full is fundamental to managing UK tax exposure.

Getting the SRT wrong has significant consequences in either direction: spending too many days in the UK unintentionally can make you UK-resident and trigger UK tax on your worldwide income; incorrectly assuming non-residence can result in you failing to file UK tax returns and facing penalties and interest on unpaid tax.

This guide works through the SRT in full.

The Structure of the SRT

The SRT has three parts, applied in order:

1. Automatic overseas tests (if you meet one, you are non-UK resident for the whole year — stop here)
2. Automatic UK residence tests (if you meet one, you are UK resident for the whole year — stop here)
3. Sufficient ties test (if you fall into neither automatic category, the number of "ties" you have to the UK determines residency based on your UK day count)

Part 1: Automatic Overseas Tests

If you meet any of the following, you are automatically non-UK resident for that tax year.

Test 1: Fewer than 16 days in the UK If you were present in the UK for 15 days or fewer during the tax year, you are non-UK resident, regardless of any other factors. This is the safest and simplest non-residence position. There are no ties to consider, no exceptions.

Test 2: Fewer than 46 days — previous non-residence If you were non-UK resident in each of the three preceding tax years AND you are present in the UK for 45 days or fewer in the current year, you are non-UK resident.

Test 3: Full-time work abroad If you work full-time abroad for at least 365 days during the tax year (with no significant breaks), you are non-UK resident provided:

• You spend fewer than 91 days in the UK during the tax year, and
• Fewer than 31 of those UK days are "working days" in the UK (a working day is defined as spending more than 3 hours working in the UK on that day)

"Full-time work" means working an average of 35 hours or more per week over the 365-day period. The definition of a significant break (a period of more than 31 days with no working days) is important — a long holiday can disrupt the test.

This test allows people genuinely working full-time overseas to return to the UK regularly without triggering UK residency, provided the UK day count and UK working-day tests are met.

Part 2: Automatic UK Residence Tests

If you have already passed the automatic overseas tests (none apply), check whether any automatic UK residence test applies.

Test 1: Present in the UK for 183 days or more If you are present in the UK for 183 days or more in the tax year, you are automatically UK-resident regardless of any other factors.

Test 2: Only home is in the UK If you have a home in the UK AND you have no home elsewhere (or your only home abroad is somewhere you visit for fewer than 30 days during the tax year), you are UK-resident. A "home" is a settled abode — a place you spend time with a degree of regularity and permanence, not a hotel or temporary accommodation.

Test 3: Full-time work in the UK If you work full-time in the UK for at least 365 days during the tax year (with no significant breaks), you are UK-resident provided:

• More than 75% of your working days in the 365-day period are UK working days, and
• At least one working day in the UK falls within the tax year

Part 3: The Sufficient Ties Test

If you have not been resolved by either the automatic overseas or automatic UK tests, your residence status depends on how many "connecting ties" you have to the UK and how many days you spend in the UK.

There are five possible connecting ties. The number of ties that are "sufficient" to make you UK-resident decreases as your UK day count increases.

The Five Ties

Family tie: You have a spouse, civil partner, or partner (not separated) who is UK-resident, or you have a minor child who is UK-resident and you see them in the UK on more than 60 days during the tax year. Note: if you are working full-time abroad (but not meeting the full automatic overseas test), the family tie is not counted for that test.

Accommodation tie: You have accommodation available to you in the UK — meaning a place where you can stay that is available on more than 90 days in the tax year, and you spend at least one night there. This includes a family home you have access to, a flat you own, or a rented property. A hotel room is not an accommodation tie unless it is the same hotel room available over an extended period.

Work tie: You work in the UK on more than 40 days during the tax year. A UK working day is any day on which you do more than 3 hours of work in the UK.

90-day tie: You spent more than 90 days in the UK in either of the two preceding tax years. This is a look-back tie — it catches people whose recent history of UK presence is high.

Country tie (applies only to those who were previously UK-resident): The UK is the country in which you spent the most days during the tax year (or joint-most, in which case it counts). This tie does not apply to those who have never been UK-resident.

The Sufficient Ties Threshold Table

For someone who was previously UK-resident (resident in one of the three preceding tax years), the thresholds are more stringent:

UK days	Ties needed to be UK-resident
16-45	4 or more
46-90	3 or more
91-120	2 or more
121-182	1 or more

For someone who was not previously UK-resident (not resident in any of the three preceding tax years), only four of the five ties apply (the country tie does not):

UK days	Ties needed to be UK-resident
46-90	All 4
91-120	3 or more
121-182	2 or more

If UK days are fewer than 46 and you are not previously UK-resident, the automatic overseas test (Test 2) would already have resolved the position as non-resident.

Counting UK Days

A "day" for SRT purposes is a day on which you are present in the UK at midnight. If you arrive in the UK on Tuesday and depart on Wednesday, that is one UK day (the midnight between Tuesday and Wednesday). If you arrive and leave on the same day, it is zero UK days.

Exceptional circumstances: Up to 60 days can be disregarded if you are present in the UK in exceptional circumstances beyond your control — serious illness, natural disaster, or similar events that prevent you from leaving. These days must be genuinely exceptional and involuntary.

Transit: Being in the UK in transit — arriving and departing on the same calendar day without staying overnight — does not count as a UK day. If a connecting flight delay forces an overnight stay, that day counts.

Split-Year Treatment

In the year you leave the UK for permanent residence abroad, or arrive in the UK from abroad, it would be unfair to tax you as UK-resident for the full year if you only became resident (or ceased to be resident) partway through it. Split-year treatment addresses this.

There are eight specific "cases" of split-year treatment, each with its own conditions. The most commonly applicable are:

Case 1 (departure): You start working full-time abroad in the year and meet the full-time work abroad condition from a point in the year. The overseas part begins on the day you start work abroad.

Case 4 (arrival): You begin working full-time in the UK in the year. The UK part begins on the day you start.

Case 3 (departure): You leave the UK and have no home in the UK from a point in the year, and you subsequently meet the conditions of being non-UK resident for the remainder of the year.

Case 8 (arrival): You have been non-UK resident for the whole of the previous tax year, you arrive in the UK and acquire a home here, and you do not have a home in the UK at the start of the year.

Each case has specific conditions. It is not sufficient to simply note that you arrived or departed — you must identify which case applies and confirm all conditions are met.

The Importance of Diary Evidence

HMRC's Compliance Handbook confirms that it can enquire into a taxpayer's residence status for up to four years after the end of the tax year, extending to six years where there is a loss of tax and 20 years for fraudulent behaviour. In practice, this means records need to be kept for at least six years.

The minimum records to maintain:

• A diary or log of all days in the UK (date of arrival, date of departure)
• Evidence of presence outside the UK (boarding passes, hotel receipts, passport stamps)
• Employment records, payslips, or invoices showing where work was performed
• Details of accommodation in the UK and abroad
• Any family circumstances relevant to the family tie

In a potential enquiry, HMRC may request mobile phone location data, credit card statements, and other third-party records to verify your day count. Keeping your own records contemporaneously — rather than reconstructing them from memory — is essential.

How Global Investments Can Help

The SRT is objective and deterministic — given the facts, the answer is clear — but establishing the facts accurately requires careful record-keeping and analysis, particularly where ties are borderline or UK day counts are close to relevant thresholds. Global Investments works with internationally mobile clients to review their residence position, identify risk areas, and ensure proper self-assessment filings are made. We also provide pre-departure and pre-return planning to ensure you understand the implications before you act. Please speak with one of our advisers.