UK Statutory Residence Test (SRT) Explained : The Complete Guide to UK Tax Residency for Expats

What Is the Statutory Residence Test?

The Statutory Residence Test (SRT) has determined UK tax residence since 6 April 2013. It provides a statutory framework for deciding whether an individual is UK tax resident for a particular tax year, replacing the previous reliance on case law and the concept of "ordinary residence."

The SRT applies separately to each UK tax year (6 April to 5 April). Your residence status does not automatically continue from one year to the next. Instead, you must assess your circumstances each tax year by applying the statutory tests in the correct order.

The SRT follows a structured three-stage process:

1. Automatic Overseas Tests - if one of these applies, you are automatically non-UK resident for that tax year.
2. Automatic UK Tests - if none of the overseas tests apply, you consider whether one of the automatic UK residence tests is met.
3. Sufficient Ties Test - if neither automatic test determines your status, you assess your UK connections ("ties") together with your UK day count.

For most individuals, one of the automatic tests determines the outcome. The sufficient ties test is only required where the automatic tests do not provide a definitive answer.

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Tier 1: Automatic Overseas Tests

You are automatically non-UK resident if any one of the following statutory tests applies.

Test 1 - Previously UK Resident

You are automatically non-resident if:

• you were UK resident in one or more of the previous three tax years, and
• you spend fewer than 16 days in the UK during the current tax year.

This is commonly known as the 16-day rule and is frequently relied upon by established expatriates making short visits to the UK.

Test 2 - Newly Arrived Individuals

You are automatically non-resident if:

• you were not UK resident in any of the previous three tax years, and
• you spend fewer than 46 days in the UK during the tax year.

This rule typically applies to individuals who have not recently lived in the UK.

Test 3 - Full-Time Work Overseas

You are automatically non-resident if throughout the relevant period:

• you work full-time overseas,
• you spend fewer than 91 days in the UK,
• you work in the UK on fewer than 31 UK workdays, and
• there is no significant break from your overseas employment.

A UK workday generally means performing more than three hours of work in the UK on a calendar day.

If any Automatic Overseas Test applies, there is no need to consider the Automatic UK Tests or the Sufficient Ties Test.

Tier 2: Automatic UK Tests

If none of the Automatic Overseas Tests applies, you should consider whether you satisfy any of the Automatic UK Tests.

You are automatically UK resident if one of the following applies.

Test 1 - 183-Day Test

You spend 183 days or more in the UK during the tax year.

This is the simplest and most commonly encountered automatic residence test.

Test 2 - Only Home Test

You may be automatically UK resident if:

• you have a home in the UK for at least 91 consecutive days,
• you spend at least 30 days in that home during the tax year, and
• during the relevant period you have no overseas home, or you spend only limited time in any overseas home.

This test often affects individuals who relocate to the UK while retaining property overseas.

Test 3 - Full-Time Work in the UK

You are automatically UK resident if you work full-time in the UK over a continuous 365-day period (subject to statutory conditions), with part of that period falling within the relevant tax year.

Because the detailed conditions can be complex, professional advice is often appropriate where this test may apply.

If none of these tests determines your residence status, you must move to the Sufficient Ties Test.

Tier 3: The Sufficient Ties Test (The Ties Test)

If you don't satisfy Tiers 1 or 2, the ties test determines your status.

The ties test has two parts:

1. Count your ties to the UK (there are five possible ties).
2. Compare your UK day count to your ties. The more ties you have, the fewer UK days you need to be considered resident.

The Five Ties

• Family tie: You have this tie if your spouse, civil partner, cohabiting partner, or minor child is UK resident. Children in the UK only for full-time education do not count (e.g., a child at boarding school does not trigger the family tie).
• Accommodation tie: You have this tie if you have accommodation available to you in the UK for a period of at least 91 consecutive days, and you actually occupy it (at least one night). This could be your own home, a property you own but let out (if you have keys and could use it), or a property owned by a close relative where you spend 16+ nights in the year.
• Work tie: You have this tie if you work in the UK for 3+ hours on at least 40 days in the tax year. This can be employed work, self-employed work, or any work. Remote work for an overseas employer done in the UK counts. If you work in the UK on 39 days, you don't have a work tie.
• 90-day tie: You have this tie if you spent more than 90 days in the UK in either of the two previous tax years. If you spent 91 days in 2025/26 or 2024/25, you have the 90-day tie in 2026/27. If you spent exactly 90 days, you don't have the tie (it's more than 90, not 90 or more).
• Country tie: You have this tie if you spent more days in the UK than in any other single country in the current tax year. However, this tie only applies if you were UK resident in at least one of the three preceding tax years. If you're a fresh start (never been UK resident), the country tie doesn't apply.

Applying the Sufficient Ties Test

Unlike the automatic tests, the Sufficient Ties Test uses different residence tables depending on your recent residence history.

HMRC distinguishes between:

• Arrivers - individuals who were not UK resident in any of the previous three tax years, and
• Leavers - individuals who were UK resident in one or more of the previous three tax years.

Because the day-count thresholds differ significantly between Arrivers and Leavers, it is essential to apply the correct statutory table.

Rather than relying on simplified thresholds, always assess:

• your UK day count,
• the number of UK ties you have, and
• whether you are classified as an Arriver or Leaver for that tax year.

Using the wrong table is one of the most common causes of incorrect residency calculations.

Split-Year Treatment

Split-year treatment is a separate statutory provision that can apply when an individual either leaves the UK or arrives in the UK during a tax year.

Where the statutory conditions are satisfied, the tax year is divided into:

• a UK resident period, and
• a non-UK resident period.

There are eight statutory split-year cases, covering situations such as:

• starting full-time work overseas,
• accompanying a spouse or civil partner overseas,
• ceasing to have a UK home,
• establishing a home in the UK,
• beginning full-time work in the UK.

Split-year treatment is not automatic simply because you move abroad. The relevant statutory conditions must be satisfied, and where required, the claim should be reflected correctly on your Self Assessment return, including the SA109 Residence pages where applicable.

Because the rules are highly technical, professional advice is recommended where split-year treatment may significantly affect your UK tax liability.

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Common Mistakes in the Ties Test

Mistake 1: Counting sleeping nights, not calendar days

A 'day in the UK' is any calendar day when you're physically present, even for a few hours. If you arrive in London on 15 December and leave on 20 December, that's 6 days in the UK (including arrival and departure days). HMRC counts arrival/departure days as full days. Don't undercount.

Mistake 2: Misunderstanding the accommodation tie

You don't have an accommodation tie just because you could theoretically stay in a property. You must have actual access (keys, availability) and could realistically use it. If you rent out a furnished holiday let with a management company and have never entered it, the courts say you don't have the tie.

Mistake 3: Forgetting the child at boarding school

A child in the UK only for education does not count towards the family tie. If your only UK tie is a child at boarding school, you have zero ties and are non-resident regardless of day count.

Mistake 4: Getting the 90-day threshold wrong

The 90-day tie triggers on "more than 90 days," not "90 or more." If you spent exactly 90 days last year, you don't have the tie. Count carefully.

Mistake 5: Ignoring the country tie

The country tie only applies if you were UK resident in one of the three preceding years. If you're a fresh start, the country tie doesn't exist for you. This is easy to forget.

HMRC's Approach and Documentation

HMRC takes the SRT seriously and challenges expat tax returns regularly. To avoid an enquiry or challenge:

• Document your status: Prepare a brief written statement of your SRT analysis for each year, showing day counts, ties, and conclusion.
• Keep records: Maintain a day-count log, passport records, or travel documentation showing when you were in/out of the UK.
• Report consistently: If you claim non-residency, be clear on your Self-Assessment return (SA109 supplementary page).
• Get advice: If you're in the gray area (close to residency thresholds), get professional advice and file with confidence, knowing an expert has reviewed it.

Tools and Resources

HMRC publishes extensive guidance on the SRT in its "Residence, Familiarisation and Gains Manual" (RFIG). There are also SRT calculators available online that help you work through the tests step-by-step.

However, calculators are only as good as your input. If you miscalculate day counts or misidentify ties, a calculator won't save you. Get professional advice if you're unsure.

Your Action Plan

Step 1: Gather your records-passport, travel documents, employment contracts-for the relevant tax year.

Step 2: Count your days in the UK precisely. Don't round. Every day counts.

Step 3: Identify your ties. Be honest: if you don't have a tie, don't claim it.

Step 4: Apply the automatic overseas test. If you satisfy it, you're non-resident. Done.

Step 5: If not, apply the automatic UK test. If you satisfy it, you're resident. Done.

Step 6: If not, apply the ties test. Count ties, find the threshold, compare to day count, determine status.

Step 7: If you left partway through the year, check if you qualify for split-year treatment. If so, claim it on your SA109.

Step 8: File your Self-Assessment confidently, and keep your SRT working paper for six years.

The Bottom Line

The Statutory Residence Test is one of the most detailed areas of UK personal taxation, but it follows a logical sequence when applied correctly. Start with the Automatic Overseas Tests, then consider the Automatic UK Tests, and only apply the Sufficient Ties Test if neither automatic test determines your position.

Because small differences in day counts, workdays, or UK ties can change your residency status, maintaining accurate travel records and reviewing your circumstances each tax year is essential. Where your position is close to the statutory thresholds, obtaining professional advice can help reduce the risk of HMRC enquiries and unexpected tax liabilities.