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The short answer
Under the Statutory Residence Test you are automatically not UK resident for a tax year if you spend fewer than 16 days in the UK and were resident in at least one of the previous three years, or fewer than 46 days if you were resident in none of them. A day counts only if you are in the UK at midnight, with transit days excluded and a deeming rule that can add days back for people with strong UK ties.
If you spend most of the year in Lagos or Abuja and come to the UK for weddings, graduations or business, the number of nights you spend here may decide whether you are UK resident for tax. The Statutory Residence Test, in force since 6 April 2013, starts with simple day thresholds before it gets to anything complicated. Getting the count right is the whole game.
The automatic overseas tests
HMRC's RDR3 guidance sets out three tests. Meet any one and you are not UK resident for the tax year (6 April to 5 April), whatever your ties.
| Test | Who it applies to | Threshold |
|---|---|---|
| First | UK resident in one or more of the previous three tax years | Fewer than 16 days in the UK |
| Second | Not UK resident in any of the previous three tax years | Fewer than 46 days in the UK |
| Third | Working full-time overseas | Fewer than 91 UK days, fewer than 31 days working more than three hours in the UK, and no significant break from the overseas work |
So someone who left London for Lagos two years ago is held to the tighter 16-day test, while a Nigerian who has never lived in the UK, or left more than three full tax years ago, has 46 days. "Fewer than" matters: 16 days fails the first test, 15 passes.
How a day is counted
- Midnight rule. HMRC's SA109 notes say a day counts if you are in the UK at midnight. Land at Heathrow at 6pm and that day counts; leave on a 9am flight and that day does not.
- Transit days. A day travelling from one country outside the UK to another, passing through the UK, is a transit day and is not counted.
- Exceptional circumstances. Days spent in the UK only because of exceptional circumstances beyond your control can be left out, up to a maximum of 60 days in a year; HMRC's RDR3 guidance explains what qualifies.
- Deeming rule. If you were UK resident in one or more of the previous three years, have at least three UK ties, and are in the UK on more than 30 days without being here at midnight, some of those days are counted anyway.
Worked example
Example only. Chidi left Manchester for Abuja in 2024 and was UK resident in 2023 to 2024, so the 16-day test applies to him. In 2026 to 2027 he makes three trips:
- Arrives Sunday evening, leaves the following Saturday morning: in the UK at midnight on Sunday to Friday, six days.
- Arrives Thursday afternoon, leaves on a flight in the early hours of Tuesday: in the UK at midnight on Thursday, Friday, Saturday, Sunday and Monday, five days.
- Lands at 7am and flies on to Toronto at 9pm the same day: he is not in the UK at midnight, so the day does not count, and as a day travelling between two other countries it is also a transit day.
Total: 11 days, under 16, so Chidi passes the first automatic overseas test and is not UK resident for 2026 to 2027. One more five-night trip would push him to 16 and fail the test, and he would then need the rest of the Statutory Residence Test.
If you miss the automatic tests
Failing an automatic overseas test does not make you UK resident. RDR3 next checks the automatic UK tests (for example 183 days or more in the UK, or your only home being in the UK), and if none apply, the sufficient ties test. The five ties are family, accommodation, work (40 or more days working more than three hours in the UK, per the SA109 notes), 90-day and country; the country tie counts only if you were resident in one or more of the previous three years. The more ties you have, the fewer days it takes to become resident:
| UK days | Resident in 1+ of previous 3 years | Resident in none |
|---|---|---|
| 16 to 45 | 4 ties needed | Always non-resident (under 46) |
| 46 to 90 | 3 ties | 4 ties |
| 91 to 120 | 2 ties | 3 ties |
| Over 120 | 1 tie | 2 ties |
Our full guide to the Statutory Residence Test for Nigerians covers the ties in detail. If you might come back within five years, also read the temporary non-residence rule.
Keeping a day log
Keep a simple record for each trip: arrival date and time, departure date and time, the purpose, and whether you worked. Keep boarding passes, e-tickets and hotel receipts. If you need to file, the day total goes in box 10 of the SA109 residence pages and transit days in box 11.1. Nigerian tax residence is a separate test with its own rules; see Nigerian tax residence after moving.
Where Pryme fits
Card and account activity is one of the simplest ways to reconstruct where you were. A Pryme account works from Nigeria and the UK with GBP and NGN in one place, and dated statements can be produced as verifiable documents through VerifyDoc.ai if an adviser needs them.
Questions people ask
How many days can I spend in the UK without being tax resident?
If you were UK resident in any of the previous three tax years, fewer than 16 days makes you automatically non-resident. If you were not, the limit is fewer than 46 days. Above those, the ties test decides.
Does the day I arrive in the UK count?
Yes, if you are still in the UK at midnight. The day you leave counts only if you are here at midnight that day, which usually you are not.
Does a connecting flight through Heathrow count as a UK day?
Not if it is a transit day: travelling between two other countries without staying past midnight.
What happens if I spend 20 days in the UK?
You fail the 16-day test if you were recently resident, but you are not automatically resident. The sufficient ties test then applies; with 16 to 45 days you would need four ties to be resident.
Sources
- HMRC: RDR3 Statutory Residence Test guidance note (updated 11 Jun 2026) · accessed Oct 2026
- HMRC: SA109 Residence, remittance basis etc. notes 2026 · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.