The UK Statutory Residence Test Explained: A Guide for Expats

Whether or not you are UK tax-resident in any given year is one of the most fundamental questions in expat financial planning. It determines whether HMRC can tax your worldwide income and capital gains, whether you qualify for UK pension contributions, and whether UK inheritance tax applies to your global estate.

The Statutory Residence Test (SRT) has been in force since 6 April 2013 and provides the definitive framework for determining UK tax residency. Despite being introduced over a decade ago, it remains widely misunderstood — and the consequences of getting it wrong can be severe.

This guide explains how the SRT works, the tests that determine your residence status, what "split year treatment" means, and the most common mistakes expats make.

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Why the SRT Matters

Before the SRT, UK tax residency was determined by case law — a patchwork of precedents that produced uncertain outcomes. The SRT replaced this with a statutory code, but it is far from simple. HMRC's own guidance on the SRT runs to well over 100 pages.

Getting the SRT wrong has serious consequences:

• If you believe you are non-UK-resident but the SRT puts you as UK-resident, HMRC can claim tax on your worldwide income and gains — including income that you have not disclosed on a UK return, potentially resulting in penalties, interest and in serious cases, investigation
• If you are incorrectly treated as non-UK-resident in a year when you were actually UK-resident, the time limits for HMRC to assess you are extended
• Double tax treaty relief may be unavailable if you are simultaneously resident in two countries and the tie-breaker has not been properly applied

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Overview of the SRT Framework

The SRT applies a three-step process:

Step 1: Automatic non-UK residence tests — If you meet any of these, you are automatically non-UK-resident for that tax year (regardless of anything else)

Step 2: Automatic UK residence tests — If you meet any of these, you are automatically UK-resident for that tax year (regardless of anything else)

Step 3: Sufficient ties test — If you pass neither step 1 nor step 2, your residence status is determined by counting your UK days and your "UK ties"

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Step 1: Automatic Non-Residence Tests

You are automatically non-UK-resident in a tax year if:

Test A: You were UK-resident in one or more of the three previous tax years, and you spend fewer than 16 days in the UK in the current year.

Test B: You were not UK-resident in any of the three previous tax years, and you spend fewer than 46 days in the UK in the current year.

Test C: You are working full-time abroad (35+ hours per week, averaged over the year, with no significant work days in the UK) and spend fewer than 91 days in the UK with no more than 30 days doing significant work in the UK.

Key terms:

• A "day" in the UK counts if you are in the UK at midnight (with limited exceptions for transit and exceptional circumstances)
• "Significant work" means more than 3 hours of work in the UK on a day

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Step 2: Automatic UK Residence Tests

You are automatically UK-resident in a tax year if:

Test A: You spend 183 days or more in the UK in the tax year.

Test B: You have a home in the UK in which you spend a sufficient number of days (broadly, you have a UK home available for at least 91 days and you spend at least 30 days there during the period, and you do not have a home abroad in which you spend comparable time).

Test C: You work full-time in the UK (35+ hours per week, averaged) with no significant overseas periods.

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Step 3: The Sufficient Ties Test

If you are not automatically resident or non-resident, your status depends on combining:

• The number of days you spend in the UK, AND
• The number of "UK ties" you have

The five UK ties

1. Family tie: Your spouse, civil partner or minor child is UK-resident (unless the child lives full-time in UK education and you spend time there only for the purposes of seeing the child)

2. Accommodation tie: You have a place to stay in the UK (whether your own home, a family home, a rented property, or somewhere else you use) and you spend at least one night there during the year

3. Work tie: You do more than 40 work days in the UK during the year (more than 3 hours' work on each such day)

4. 90-day tie: You have spent more than 90 days in the UK in either (or both) of the two previous tax years

5. Country tie: The UK is the country you have spent most time in during the tax year (only applies to individuals who were UK-resident in one or more of the previous three tax years)

The day-count thresholds

The number of UK days that tip you into UK residence depends on how many ties you have:

For individuals who were UK-resident in one or more of the three previous years (often called "leavers"):

UK days	Ties needed to be UK-resident
Fewer than 16	Automatic non-residence
16–45	4 ties
46–90	3 ties
91–120	2 ties
121–182	1 tie
183+	Automatic residence

For individuals not UK-resident in any of the three previous years (often called "arrivers"):

UK days	Ties needed to be UK-resident
Fewer than 46	Automatic non-residence
46–90	All 4 ties (not the country tie)
91–120	3 ties
121–182	2 ties
183+	Automatic residence

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Split Year Treatment

In the year you leave or return to the UK, the tax year is often split into a UK-resident period and a non-UK-resident period. This is known as "split year treatment" and means HMRC taxes you on UK basis for the UK-resident part of the year and on a non-resident basis for the rest.

There are eight defined "cases" of split year treatment; not everyone qualifies. Common cases include:

• Case 1: Starting full-time work abroad (with partner)
• Case 4: Starting full-time work abroad (without partner, or partner leaving later)
• Case 5: Ceasing full-time work abroad and returning to the UK

Split year treatment is not automatic — it must be claimed on your UK self-assessment return, and the specific case must be identified.

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Day Counting: The Devil Is in the Detail

Day counting for SRT purposes sounds straightforward but contains several traps:

Midnight rule

A day counts if you are in the UK at midnight — not if you merely pass through or arrive and depart within the same calendar day without sleeping there. However, if you are in the UK at the end of the day (midnight) then it counts.

Exceptional circumstances

Days spent in the UK due to exceptional, unforeseen circumstances beyond your control (serious illness, bereavement, national emergency affecting travel) do not count as UK days, up to a maximum of 60 days per year. This must be documented.

Deeming rule for transit

Days where you are in the UK in transit between two overseas journeys (arriving and departing on the same day, not at midnight) generally do not count.

Record keeping

You must be able to prove your day count if challenged by HMRC. Keep travel records: passport stamps, boarding passes, flight records, hotel receipts, credit card statements and calendar entries. The burden of proof is on you.

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Common Mistakes

1. Thinking 183 days is the only test that matters. Many people believe they are UK non-resident simply by spending fewer than 183 days in the UK. In fact, far fewer UK days can result in UK residency if you have multiple UK ties.

2. Maintaining a UK family home without understanding the accommodation tie. If you maintain a UK property and stay there even one night during the year, you have an accommodation tie. Combined with other ties, this can establish UK residence at relatively low day counts.

3. Forgetting about the 90-day tie. If you spent more than 90 days in the UK in either of the two previous years, you carry a 90-day tie forward. This is a common pitfall for people who have only recently left the UK.

4. Not claiming split year treatment. Some individuals are entitled to split year treatment but fail to claim it, resulting in full-year UK-basis taxation.

5. Believing leaving the UK permanently solves everything immediately. If you have three or more UK ties, you could be UK-resident in the year of departure even with relatively few UK days. The transition to non-residence typically takes careful management over 1–2 tax years.

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Checklist: Managing Your SRT Position

• Count your UK days for the current tax year carefully, using the midnight rule
• Identify all five potential UK ties and which ones you have
• Verify whether any automatic test (Step 1 or Step 2) applies
• If neither automatic test applies, use the sufficient ties table to determine residence status
• Check whether split year treatment applies in the year of departure or return
• Maintain records of travel dates (boarding passes, passport stamps, credit card records)
• Document any exceptional circumstances that should not count as UK days
• File UK self-assessment returns as required, claiming any split year or treaty reliefs

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This guide provides general information only and does not constitute tax advice. The Statutory Residence Test is complex and involves detailed analysis of individual facts. HMRC guidance and the legislation itself should be consulted for authoritative guidance. Seek qualified UK tax advice, particularly in the year of departure from or return to the UK.

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How Global Investments Can Help

Getting your UK tax residency status right is the foundation of effective expat financial planning. At Global Investments, we work with internationally mobile clients and their UK tax advisers to ensure their SRT position is correctly understood, properly documented, and that the financial planning strategies we recommend are appropriate for their actual residency status. If you are unsure of your UK tax residency position — or approaching a change of residence — contact us to arrange a review.