The statutory residence test: how the UK decides you belong to it

Figures relate to tax year 2025-26 (UK)

The statutory residence test is how HMRC decides whether you are UK resident for a tax year. Resident means the UK can tax your worldwide income. Not resident means it generally taxes only UK sources. The test runs on counted days and defined ties, so it leaves very little room for opinion.

That precision cuts both ways. Follow the rules and your position is certain. Ignore them and you can become resident by accident, simply by visiting too often. So this guide walks through the three parts of the test, the day counts behind them, and the traps that catch Americans and returning Britons alike.

Key takeaways

• The test has three parts, applied strictly in order: automatic overseas, automatic UK, then sufficient ties.
• A day usually counts if you are in the UK at midnight.
• Spend 183 days or more here and you are resident, with no further argument.
• Between the extremes, ties decide it — family, accommodation, work, prior presence and country.
• The UK tax year runs 6 April to 5 April, so day counts never match the calendar year.

What is the statutory residence test?

It is the set of rules that replaced decades of vague case law in 2013. Instead of judging where your life feels centred, the statutory residence test asks measurable questions: how many days were you here, and do you have a home and family here? Each answer is checkable, which is precisely the point of the design.

The full rules live in HMRC's guidance note RDR3 on the statutory residence test (opens in a new tab). It is dense, but it is also definitive. When a position matters, that document settles it rather than any summary.

Part one: are you automatically non-resident?

Check this first, because passing it ends the enquiry. You are automatically not resident if you spend fewer than 16 days here and were resident in any of the three previous years. Arrivals get more room: fewer than 46 days works if you were not resident in those years.

A third route covers full-time work abroad. Broadly, you must work sufficient hours overseas across the year, with limited UK workdays and fewer than 91 UK days. Anyone taking a job abroad mid-year should model this carefully, because part-year moves rarely qualify cleanly.

Part two: are you automatically resident?

This part catches the obvious cases. Spend 183 days or more in the UK during the tax year and you are resident, full stop. No ties, no arguments, no planning left to do.

Two further routes apply. Having your only home in the UK for a qualifying period makes you resident. So does working full-time here across a defined period. Most people meet the day count long before either of these matters.

Part three: how do the sufficient ties work?

If neither automatic part settles the question, ties decide it. You count how many ties you have to the UK, then compare that against your days here. The more ties, the fewer days it takes to make you resident, which is the whole logic of the sliding scale.

• Family tie — a spouse, partner or minor child resident in the UK.
• Accommodation tie — a place available to you here for 91 days, used at least once.
• Work tie — 40 or more UK workdays of three hours or more.
• 90-day tie — more than 90 UK days in either of the two previous tax years.
• Country tie — the UK is where you spent the most days, for leavers only.

Read the two columns side by side. Leavers are held to tighter counts than arrivers, because the rules assume existing connections take time to fade. A returning Briton with family and a flat here can become resident on 46 days, while a genuine newcomer would need 91.

Residence is arithmetic dressed as a lifestyle question. Count the days before the days count you.

What actually counts as a day?

The basic rule is midnight. If you are in the UK at the end of the day, that day counts. Fly out on Tuesday morning and Tuesday does not count. Fly in on Tuesday evening and it does.

Two refinements matter. Transit days can be ignored where you arrive and leave without doing anything unrelated to travel. And an exceptional circumstances rule can discount days spent here because of events beyond your control, capped at 60 days a year and applied narrowly.

How do you work through the test?

Order matters, because the three parts apply in strict sequence and the first clear answer wins. So never jump straight to the ties. Work through the steps below in order, keeping evidence as you go, and stop at the first part that gives you a definite result:

1. Fix the tax year you are testing — 6 April to 5 April, never the calendar year.
2. Count your UK midnights for that year, using boarding passes rather than memory.
3. Apply the automatic overseas tests first; if one applies, you are not resident and you stop.
4. Apply the automatic UK tests next; if one applies, you are resident and you stop.
5. Otherwise count your ties, then read the days-versus-ties table for leavers or arrivers.
6. Check whether split-year treatment applies to a year of arrival or departure.
7. Keep the workings with your tax records, because HMRC can ask years later.

Split years: the exception that softens a move

Normally residence applies to a whole tax year. Split-year treatment can divide the year into a UK part and an overseas part, so you are taxed as resident for only part of it. It applies in defined cases, such as starting full-time work abroad or acquiring a home here.

The cases are specific and the conditions strict, so split-year status is claimed rather than assumed. Anyone moving mid-year should check it before booking flights, because a departure date a few weeks either side can change the outcome entirely. Our moving to the UK tax checklist covers the practical sequence.

Why Americans need this test too

American citizens file US returns wherever they live, so it is tempting to treat UK residence as somebody else's problem. It is not. UK residence decides whether HMRC taxes your worldwide income, including US dividends, interest and gains.

In our practice we see the consequences most often at the edges. Someone splits time across the Atlantic, assumes they are American for tax and nothing else, and discovers a UK filing duty covering their entire portfolio. The guide to what Americans in the UK actually file sets out both sides of that picture.

A worked example

Take an illustrative example. A consultant leaves London for New York in 2024 but keeps a flat here, and his children stay at school in Surrey. In 2025-26 he returns for 100 days of meetings and family time.

He counts three ties: family, accommodation and the 90-day tie. As a leaver with three ties, 46 days makes him resident. At 100 days he is comfortably over, so the UK taxes his worldwide income for that year. That sweeps in roughly £40,000 of US dividends he never expected HMRC to see.

Fifty fewer days would have changed the answer completely. Nobody told him to count, and by the time anyone asked, the year had closed. That is how most residence problems begin — not with a decision, but with an unexamined travel habit.

Planning around the thresholds

Because the test is arithmetic, it responds to planning better than almost any other tax rule. Ties are structural and slow to change, but days are a diary matter you control. So the practical work is usually about shaping the calendar.

Start by counting ties honestly, then read your limit off the table above. Track midnights in a running note from 6 April, not in December. Then, if you approach the line, move the discretionary trips into the next tax year rather than gambling on the last week of March.

The mistakes and penalties that follow bad counting

Residence errors cascade, because everything else on a return depends on the answer. According to HMRC's guidance on residence and foreign income (opens in a new tab), residents are taxed on worldwide income, so getting this wrong misstates the whole return. These are the repeat offenders:

• Counting calendar years instead of the 6 April to 5 April tax year.
• Forgetting the midnight rule and counting arrival days that never counted.
• Missing the accommodation tie because the flat is a relative's rather than owned.
• Assuming full-time work abroad automatically applies, without meeting the hours conditions.
• Treating split-year treatment as automatic when it must be claimed and justified.
• Reconstructing travel a year later, when airlines have already purged the itineraries.

The penalty exposure is indirect but real. A wrong residence call usually means an incorrect or missing return, and the late-filing ladder starts from there. That ladder opens at £100, adds £10 a day after three months, then charges percentages of the tax at six and twelve months. Our free late-filing penalty calculator shows how quickly those charges build.

How US UK Tax Accountants helps

We run the statutory residence test properly, with day counts documented and ties assessed against the facts rather than assumptions. Our UK Self Assessment service then files the position that follows, and coordinates it with the American return where both apply.

One senior specialist holds the whole picture, on a fixed fee agreed in writing before any work begins. Where a few days either way would change your position, we say so while you can still act on it.

Know your position before the year ends

The statutory residence test rewards people who count early and punishes those who reconstruct late. If your travel pattern is anywhere near a threshold, this is the moment to model it. Tell us your situation and we will confirm the position and quote a fixed fee in writing. Book a consultation and hear back within one working day.

Last reviewed 8 September 2026 by the US UK Tax Accountants Tax Team. This article is general information, not personal tax advice — speak to a qualified US/UK tax adviser about your own position.

For the neighbouring question, State tax after you leave: the bill that follows Americans abroad walks through it in detail.