What is the first automatic overseas test?

The first automatic overseas test (RFIG20100) settles non-residency automatically if two conditions are both met: you spent 45 or fewer days in the UK in the tax year, and you were not UK resident in any of the three preceding tax years. Both conditions must be satisfied simultaneously. If either fails, this test does not apply.

How many days can I spend in the UK if I have never been UK resident?

45 or fewer UK days in the tax year. Days are counted using the midnight rule, a day counts if you are present in the UK at midnight. Arrival days count; departure days do not. If both conditions of the first automatic overseas test are met, non-residency is confirmed and no further analysis is needed.

What counts as a UK day under the statutory residence test?

A UK day is any day on which you are present in the UK at midnight at the end of that day (RFIG20060). The day you arrive counts if you are still in the UK at midnight. The day you depart does not count. Days spent in the UK only because of genuine exceptional circumstances beyond your control may be disregarded, up to a maximum of 60 days per tax year (RFIG20730).

What if I was UK resident four years ago but not the last three years?

You can still use the first automatic overseas test. The second condition requires that you were not UK resident in any of the three tax years immediately preceding the year being assessed. Residency from four or more years ago falls outside that window and has no effect on your eligibility. Provided you were non-resident in each of the three preceding years, the condition is met.

What happens if I spend 46 UK days and have never been UK resident?

The first automatic overseas test does not apply, as 46 days exceeds the 45-day limit. The second automatic overseas test also does not apply, as it is for people who were previously UK resident. You would then need to check the third automatic overseas test (if working full-time overseas), then the automatic UK tests, and if neither set applies, the sufficient ties test.

Do I need to count my UK ties if I pass the first automatic overseas test?

No. Passing any automatic overseas test settles non-residency for the tax year. You do not need to count your ties, apply the threshold tables, or assess any further stage of the SRT. The automatic overseas tests take statutory precedence, and the result is conclusive.

What are exceptional circumstances days under the first automatic overseas test?

Exceptional circumstances days are days you were present in the UK due to events genuinely beyond your control, for example a medical emergency that prevented travel, a natural disaster, or civil unrest making departure impossible. Work commitments and most transport disruption do not qualify. A maximum of 60 days per tax year can be disregarded. If disregarded, these days do not count towards the 45-day limit.

What is the difference between the first and second automatic overseas tests?

Both tests use a day-count threshold to confirm non-residency automatically, but the threshold differs based on your recent residency history. The first test (45-day limit) applies if you were not UK resident in any of the three preceding tax years. The second test (15-day limit) applies if you were UK resident in one or more of those years. If you were resident in even one of the previous three years, only the second test is available to you.

First Automatic Overseas Test: The 45-Day Rule Explained

For someone who has never been UK resident, the Statutory Residence Test offers a clean route to confirmed non-residency. Spend 45 or fewer days in the UK in the tax year, meet one further condition, and the result is settled immediately. No tie-counting, no further analysis required.

This is the first automatic overseas test (RFIG20100). It is the simplest route to non-residency in the SRT, and it applies to anyone who meets two specific conditions simultaneously. The difficulty is not in applying the test itself but in understanding exactly what the second condition requires, and where people most often get it wrong.

If you want to check whether this test applies to your situation, the SRT questionnaire works through all six automatic tests in the correct statutory order and gives you a clear determination in about 10 minutes.

Key points

The first automatic overseas test requires two conditions both to be met: 45 or fewer UK days, and no UK residency in any of the three preceding tax years
Both conditions must be satisfied in the same tax year — meeting only one is not enough
If you were UK resident in even one of the previous three years, this test is unavailable to you; the second automatic overseas test (15-day limit) applies instead
UK residency from four or more years ago does not affect eligibility — only the three immediately preceding years count
Passing this test settles non-residency conclusively — no ties test, no further analysis

What the first automatic overseas test requires

The first automatic overseas test is set out at paragraph 12 of Schedule 45 to the Finance Act 2013 and explained at RFIG20100. Two conditions must both be satisfied in the same tax year:

You spent 45 or fewer UK days in the tax year.
You were not UK resident in any of the three preceding tax years.

Condition 1: 45 or fewer UK days

Days are counted using the midnight rule. A day counts as a UK day if you are present in the UK at midnight at the end of that day (RFIG20060). The mechanics are straightforward:

Arrival days count: if you fly into the UK on a Monday and remain there at midnight, Monday is a UK day
Departure days do not count: if you leave the UK on a Friday, Thursday was your last counted day; Friday is not a UK day
Transit days do not count: if you arrive in and depart from the UK on the same calendar day without being present at midnight, that day does not count

The 45-day limit applies per tax year, running from 6 April to 5 April. Each year is assessed independently.

Days present in the UK solely because of circumstances genuinely beyond your control may be disregarded, up to a maximum of 60 days per tax year (RFIG20730). HMRC refers to these as exceptional circumstances days. The qualifying events are narrow: a medical emergency preventing travel, a natural disaster, or civil unrest making departure unsafe. Work commitments, meetings overrunning, or most transport delays will not qualify. Exceptional circumstances relief is available in genuine cases but cannot be treated as routine planning headroom.

If you want to track your UK days in real time against your threshold throughout the year, the Day Budget Dashboard updates as you log visits.

Condition 2: not UK resident in any of the previous three tax years

This is the condition that is most often misread. "Not UK resident in any of the previous three tax years" means all three of the preceding years must be non-resident. If you were UK resident in even one of those three years, the condition fails, and the first automatic overseas test is not available to you regardless of how few UK days you spent.

For the 2025-26 tax year, the three preceding years are 2022-23, 2023-24, and 2024-25.

One common question is whether a partial year of UK residency counts. It does. If you were UK resident for even part of one of those three years — because you arrived mid-year and a split year treatment case applied, for example — HMRC treats that as a year of UK residency for the purpose of this condition. The split year does not remove that year from the lookback.

Residency status for each year in the lookback is determined by the SRT as applied to that year. If you are unsure whether you were legally resident in a prior year, the safest approach is to work through the SRT for each of those years, or to take professional advice before relying on this test.

Who the first automatic overseas test is for

Two groups of people can use this test.

The first is someone who has never been UK resident — typically a foreign national who visits the UK for work, business, or family reasons. For this person, the three-year residency condition is met by default, and only the day count needs to be checked.

The second is someone who left the UK some years ago and has been non-resident for at least three complete tax years. Once three consecutive non-resident years have passed since the last year of UK residency, the first automatic overseas test becomes available again.

If you left the UK more recently — within the past one, two, or three years — the first test does not apply. You may still be non-resident, but under the second automatic overseas test (RFIG20120), which has a much stricter day limit of 15. The UK SRT automatic tests explained article covers the full set of tests and how they relate to each other.

Worked example: Yasmin

Yasmin is a Nigerian national employed by an international development organisation based in Nairobi. She has never been UK resident. In 2025-26 she makes two business trips to London: a 21-day visit in June for a global conference, and a 17-day visit in November for a funding review.

Total UK days in 2025-26: 38.

Applying the first automatic overseas test:

Condition 1: 38 days is fewer than 45 ✓
Condition 2: No UK residency in 2022-23, 2023-24, or 2024-25 ✓ (Yasmin has never been UK resident)

Yasmin passes the first automatic overseas test. She is non-resident for 2025-26.

HMRC does not need to consider her UK ties, her accommodation in London, or her employment arrangements. The test is conclusive. If Yasmin's November trip had run longer and pushed her to 46 UK days, the first automatic overseas test would fail on the day count, and she would need to work through the rest of the SRT.

Worked example: Robert and the four-year question

Robert left the UK in September 2020. He was UK resident in 2019-20 but non-resident in 2020-21, 2021-22, and 2022-23. In 2023-24 he wants to spend 44 days in the UK visiting family.

His concern is that his UK residency from 2019-20 will still count against him.

Applying the first automatic overseas test for 2023-24:

The three preceding tax years are 2020-21, 2021-22, and 2022-23. Robert was non-resident in all three.

Condition 1: 44 days is fewer than 45 ✓
Condition 2: Not UK resident in 2020-21, 2021-22, or 2022-23 ✓

The 2019-20 residency falls outside the three-year window. It is irrelevant to the assessment. Robert passes the first automatic overseas test and is non-resident for 2023-24.

This is the mirror of the main trap. Just as one year of residency within the three-year window disqualifies you from AOT1, residency that falls outside the window has no effect. The lookback is exactly three years — no more.

What if you do not qualify for the first automatic overseas test?

If either condition fails, the first automatic overseas test does not apply. Where you go next depends on the reason.

You spent 45 or fewer UK days but were UK resident in one or more of the previous three years. The first test fails on the residency condition. The second automatic overseas test now applies, but with a sharply lower threshold of 15 UK days. Spending 16 or more days means AOT2 also fails, and you continue to the next stage.

You spent more than 45 UK days and were not previously UK resident. The first test fails on the day count. The second test does not apply to you (it requires prior residency). You move to the third automatic overseas test — which may apply if you work full-time overseas — and then to the automatic UK tests if AOT3 does not settle the position.

You spent more than 45 UK days and were previously UK resident. Both AOT1 and AOT2 fail. Unless AOT3 applies (full-time overseas work), you will need to work through the automatic UK tests and potentially the sufficient ties test.

The UK SRT automatic tests explained article covers all six tests and the order in which they must be assessed. For most people approaching the sufficient ties test, the UK ties test explained sets out exactly what each tie requires and how ties affect your day threshold.

Common questions

Does passing the first automatic overseas test mean I have no UK tax obligations?

Non-residency under the SRT determines your residency status. It does not eliminate all UK tax exposure. UK-source income may still be taxable in the UK for non-residents, including certain employment income for work physically performed in the UK, UK rental income, and some investment income. Passing AOT1 means the SRT settles residency; a separate assessment of your UK-source income position may still be needed.

What if I was UK resident five years ago but non-resident for the last three?

The three-year lookback covers only the three tax years immediately before the year being assessed. Residency from five years ago is outside the window and has no effect. Provided you were non-resident in each of the three preceding years, the second condition is met.

Can exceptional circumstances days take me from above 45 to below 45?

Yes. If you would otherwise have more than 45 UK days but some of those days meet HMRC's exceptional circumstances criteria (RFIG20730), those days may be disregarded. If the disregarded days bring your count to 45 or fewer, the first condition is met. The 60-day annual cap and the qualifying conditions still apply — the circumstances must be genuinely beyond your control.

Does a split year affect the three-year residency lookback?

A year in which you were UK resident — even for only part of the year under split year treatment — counts as a year of UK residency for the purposes of the lookback. If the year in which you left the UK was 2022-23 and you were resident for the UK part of that split year, 2022-23 counts as a year of UK residency in the lookback.

What is the statutory basis for the first automatic overseas test?

The test is set out at paragraph 12 of Schedule 45 to the Finance Act 2013. HMRC's explanation and worked examples are at RFIG20100 in the Residence and FIG Regime manual.

The first automatic overseas test is the clearest route to confirmed non-residency in the SRT. For those who qualify — no UK residency in the three preceding tax years and 45 or fewer UK days in the current year — the result is settled with no further analysis required.

If your situation is more involved, or you are unsure whether either condition is met, the SRT questionnaire works through all six automatic tests in the correct order and gives you a determination with the applicable HMRC rule cited at each step. It is free, takes about 10 minutes, and requires no account.

This content is for informational purposes only and does not constitute tax advice. For complex situations, professional advice from a qualified tax adviser is recommended.