The UK Statutory Residence Test: A Complete Practical Guide

The question of whether you are a UK tax resident is not one of intuition or common sense. It is a legal determination made by applying the Statutory Residence Test (SRT), a framework that has governed UK residence since 6 April 2013. For the internationally mobile individual — whether you are leaving the UK, arriving in it, or simply spending time in both — the SRT determines your exposure to UK income tax, capital gains tax, and inheritance tax, and shapes your entire tax position. This guide walks through the complete framework in practical terms.

Why the SRT Matters

Before 2013, UK residence was determined by a patchwork of case law, Revenue guidance, and vague principles such as "ordinary residence." The SRT replaced this with a statutory code: a set of rules that can be applied mechanically, provided you know the inputs. The inputs are principally your day count in the UK and the number of connecting ties you hold.

If you are UK resident, the UK taxes your worldwide income and gains. If you are non-UK resident, the UK taxes only your UK-source income and certain UK gains (principally gains on UK real estate). The financial consequences of getting this wrong — in either direction — are severe.

The Three-Part Structure

The SRT works in sequence. You apply each part in order, stopping when you have a definitive answer.

Part 1: Automatic Overseas Tests. If any of these apply, you are automatically not UK resident for the tax year, regardless of your ties.

• You spent fewer than 16 days in the UK in the tax year (46 days if you were not UK resident in any of the three preceding tax years).
• You worked full-time overseas throughout the tax year (35 or more hours per week on average, with no more than 30 UK workdays and no more than 90 days in the UK), and you spent fewer than 91 days in the UK.
• You died during the tax year and were not resident in either of the preceding two years, and spent fewer than 46 days in the UK in the year of death.

If none of the automatic overseas tests applies, proceed to Part 2.

Part 2: Automatic UK Tests. If any of these apply, you are automatically UK resident for the tax year, regardless of your ties.

• You spent 183 or more days in the UK in the tax year.
• You had a home in the UK for at least 91 consecutive days within the tax year, and you were present in that home on at least 30 separate days in the tax year, and you either had no overseas home or spent fewer than 30 days in any overseas home during the same period.
• You worked full-time in the UK throughout the tax year (35 or more hours per week on average), with no significant break from UK work.

If none of the automatic UK tests applies, proceed to Part 3.

Part 3: The Sufficient Ties Test. You are neither automatically resident nor automatically non-resident. Your status depends on the combination of days spent in the UK and the number of connecting ties you hold.

The Five UK Ties

Each of the following counts as one tie. The more ties you have, the fewer days you need to spend in the UK before becoming resident.

Family tie. Your spouse or civil partner (or common-law equivalent if you are living together as such) is UK resident in the tax year, or your minor child (under 18) is UK resident and you see them in the UK on 61 or more days during the year. Note: if you are separated, the family tie through a former partner does not apply, though minor children may still be relevant.

Accommodation tie. You have a place to live in the UK that is available to you for a continuous period of at least 91 days in the tax year and you actually spend at least one night there. "Available" has a specific meaning: a home owned or rented by you counts; a home owned by a close relative that you can use also counts. A hotel room, by contrast, is not accommodation for this purpose.

Work tie. You do at least 40 days of UK work in the tax year, where a workday means a day on which you do more than three hours of work in the UK. This is a relatively low threshold — just under eight weeks of activity — and is frequently overlooked by business travellers.

90-day tie. You spent more than 90 days in the UK in either (or both) of the two preceding tax years. This is a backward-looking tie and catches individuals who have recently departed the UK and are still visiting frequently.

Country tie. You spent more days in the UK in the tax year than in any other single country. This tie applies only to people who were UK resident in at least one of the three preceding tax years (i.e., former residents returning). It is potentially the easiest tie to acquire inadvertently if you lead a peripatetic lifestyle.

How Ties and Days Interact

For a previously UK-resident individual (resident in at least one of the three preceding years), the sufficient ties test operates as follows:

Days in UK	Ties needed to become UK resident
16 to 45	4 ties
46 to 90	3 ties
91 to 120	2 ties
121 to 182	1 tie
183 or more	Automatically resident (Part 2)

For a previously non-UK-resident individual (not resident in any of the three preceding years), the thresholds are more generous (you need more ties for the same day count), because the automatic overseas test also applies at the lower end (under 46 days rather than under 16 days).

The practical implication is stark. An individual with a UK-resident spouse and a UK property (two ties) becomes UK resident if they spend more than 90 days in the UK. An individual with all four ties becomes resident if they spend more than 15 days in the UK. For someone with strong UK connections, the margin for visiting the UK without triggering residence is extremely narrow.

Day Counting: The Rules in Detail

What counts as a day. A day in the UK is any day on which you are present in the UK at midnight. If you fly in on Monday and fly out on Monday, that day does not count. If you fly in on Monday and fly out on Tuesday (having been present at midnight Monday/Tuesday), that counts as one day.

Transit days. Days on which you arrive from overseas and depart the same day (so-called "transit days") generally do not count for day-count purposes. However, if you spend more than 30 such transit days in the UK in a tax year, the excess transit days are counted as normal days. This rule prevents habitual short stopovers accumulating without consequence.

Exceptional circumstances. Days spent in the UK due to exceptional circumstances beyond your control — such as a sudden illness, a flight cancelled due to bad weather, or an international incident — can be disregarded up to a maximum of 60 days per tax year. HMRC applies this rule narrowly; planned delays or commercial cancellations rarely qualify.

The diary imperative. Because the SRT is a facts-and-circumstances test based on precise day counts, record-keeping is essential. A contemporaneous travel diary — passport stamps, boarding cards, hotel receipts, calendar records — is your evidence in the event of an HMRC enquiry. Creating this diary retrospectively is possible but far less credible.

Split-Year Treatment

In the year you leave or arrive, you may not be resident for the whole tax year. Split-year treatment divides the tax year into a UK-resident period and a non-UK-resident period. UK source income in the non-UK-resident period is still taxable in the UK; foreign income in the non-UK-resident period may not be. The cases for split-year treatment are complex.

HMRC identifies eight cases covering departure and arrival scenarios. Cases 1 to 3 cover individuals leaving the UK; Cases 4 to 8 cover individuals arriving. The most common departure cases are:

• Case 1: Starting full-time work overseas (and meeting the full-time overseas work test from the date you start working).
• Case 2: Your partner starts full-time work overseas and you accompany them.
• Case 3: You cease to have a UK home and you either had no UK home from the split point or your main home becomes overseas.

Each case has precise conditions. Not everyone who leaves the UK part-way through the year qualifies for split-year treatment. If split-year does not apply and you are UK resident for the full year, your worldwide income and gains are taxable in the UK for the entire year — even the months before or after you departed.

Full-Time UK Work and Full-Time Overseas Work

Two specific rules can override the day-count framework entirely.

Full-time UK work. If you work 35 or more hours per week on average in the UK throughout the tax year (subject to permitted gaps and holiday), you are automatically UK resident regardless of days. This catches secondments and extended UK assignments.

Full-time overseas work. If you work 35 or more hours per week on average overseas throughout the tax year, spend fewer than 31 days doing UK work, and spend fewer than 91 days in the UK, you are automatically non-UK resident. This is the key test for employees sent abroad by their employer. It is strict: a single breach of the 30-day UK workday limit or 90-day day-count limit means the automatic overseas test fails, and you may find yourself falling into the sufficient ties test instead.

Common Mistakes

Assuming departure equals non-residence. Leaving the UK, renting out your property, and registering as non-resident for tax is not the same as actually being non-resident under the SRT. If you still have four or five UK ties, your day-count tolerance may be in the low tens.

Forgetting business travel. Flying in and out of London for meetings adds up. Forty days of UK work (the work tie) is fewer than eight weeks of client meetings. Track every UK workday.

Ignoring the country tie. If you had no single country in which you spent more days than the UK, you acquire the country tie. Digitally mobile individuals who travel extensively may inadvertently end up spending more days in the UK than anywhere else.

Treating a UK home as inactive. If you have a family home in the UK that is available to you — even if a family member lives there — it is likely an accommodation tie.

Not planning the split-year. If you are leaving the UK part-way through the year, consider whether you can arrange your departure (including the cessation of UK work, the loss of a UK home, and your day count) to meet one of the split-year cases from an earlier date in the tax year. Earlier split points mean less UK-taxable income for the year.

The SRT and Non-Dom Status

The SRT determines residence; it does not determine domicile. These are separate legal concepts. A non-UK-domiciled individual may be UK resident under the SRT. In that case, prior to the 2025 reforms, they could potentially use the remittance basis to shelter overseas income and gains. Under the new foreign income and gains (FIG) regime introduced from April 2025, new arrivals to the UK can elect for a four-year exemption on foreign income and gains in their first four tax years of UK residence (after at least 10 years of non-UK residence). The SRT remains the gateway test: you must first establish when you became UK resident.

Practical Steps

1. Maintain a day-count diary from 6 April every year. Record every day in the UK, every workday, every overnight stay.
2. At the end of October each year (before self-assessment deadlines), count your days and assess your ties to determine whether you are resident or non-resident.
3. If you are near a threshold — within 10 to 15 days of a tie/day-count combination — seek advice before spending additional time in the UK.
4. Keep all travel documentation: passport stamps, boarding passes, hotel receipts, credit card statements showing overseas transactions.
5. In the year of departure or return, take advice on split-year treatment before the tax year ends, not after.

How Global Investments Can Help

The Statutory Residence Test has direct consequences for your UK income tax, capital gains tax, and inheritance tax position. Getting it wrong — in either direction — can result in significant unexpected tax liabilities or missed opportunities. At Global Investments, our international tax specialists work with internationally mobile clients on SRT planning as a core element of the annual financial planning review. We model the tie consequences of your travel patterns, advise on departure and arrival year structuring, coordinate with UK tax counsel on split-year treatment, and integrate the SRT analysis with your broader wealth planning. Speak with an adviser if your travel schedule or life plans are changing — the time to analyse the SRT is before the tax year is over, not after.