The UK Statutory Residence Test runs in three layers, in order. You apply the automatic overseas tests first. If none of those make you non-resident, you apply the automatic UK tests. If none of those make you UK resident, you fall to the sufficient ties test. Every founder we meet who landed in the wrong place did so because they jumped to the ties table without checking the automatic tests first.
The automatic overseas tests
You are automatically non-UK resident for the tax year if any one of these is true.
- You were UK resident in one or more of the previous three tax years and you spend fewer than 16 days in the UK in the current tax year.
- You were UK non-resident in all of the previous three tax years and you spend fewer than 46 days in the UK in the current tax year.
- You work full-time overseas (averaging at least 35 hours per week with no significant break), you spend fewer than 91 days in the UK, and no more than 30 of those involve UK work of 3+ hours.
The 16-day test is the strictest. If you are a UK leaver in tax year 1 of moving to Dubai, you almost certainly need split-year treatment (covered below) because spending fewer than 16 UK days in a full tax year is rare for anyone who keeps property, family, or business in the UK.
The automatic UK tests
You are automatically UK resident if any one of these is true.
- You spend at least 183 days in the UK in the tax year.
- Your only home is in the UK for at least 91 consecutive days, of which 30+ fall in the tax year, and you have no overseas home or you have an overseas home in which you spend fewer than 30 days.
- You work full-time in the UK for any 365-day period, with at least one day of that period in the tax year.
The sufficient ties test (where most founders actually land)
If neither automatic test resolves your status, you count UK ties and compare against UK days.
The ties are: family tie (UK-resident spouse/civil partner or minor child), accommodation tie (UK home available for 91+ days and used at least once), work tie (40+ days working in the UK at 3+ hours per day), 90-day tie (90+ UK days in either of the previous two tax years), and country tie (more UK days than days in any other single country, only relevant if you were UK resident in any of the previous 3 tax years).
Days threshold for leavers
| UK days in current year | Ties that make you resident |
|---|---|
| 16 to 45 days | 4 ties |
| 46 to 90 days | 3 ties |
| 91 to 120 days | 2 ties |
| 121 to 182 days | 1 tie |
Arrivers (people who were non-resident for all 3 prior tax years) get the same thresholds but with one fewer tie required at each step. Read the HMRC RDR3 guidance for the full table.
Where the real traps hide
Accommodation tie
If you keep your UK home empty (or available to you) for 91 consecutive days in the tax year and you spend one night there, you have an accommodation tie. Letting it on a long arm's-length tenancy through an agent removes the tie. Letting it to a family member at a peppercorn rent does not.
Work tie
The 40-day threshold counts any day with more than 3 hours of UK work. A board meeting in London counts. A pitch meeting counts. An afternoon at your UK accountant's office counts. Founders who fly back for "just a few meetings" routinely cross 40 days before realising it.
The 90-day tie
This is the trap nobody sees coming. Even after you leave, if you spent 90+ UK days in either of the two prior years, you carry the 90-day tie forward. A founder who left mid-2024 (90+ UK days), is non-resident for 2025/26, still has the 90-day tie for 2026/27 because of the 2024/25 days. Combined with one or two other ties, that determines whether 91 UK days is fine or whether 46 days is the new ceiling.
Count days obsessively. Use a spreadsheet with one row per UK day, with the date, the reason for the trip, the hours of UK work that day, and whether you stayed in your UK home. We have never seen a founder lose an HMRC enquiry on the SRT when they had a clean day log. We have seen plenty lose without one.
Split-year treatment
If you leave the UK part-way through a tax year, split-year treatment can break the year into a UK-resident part (pre-departure) and a non-UK-resident part (post-departure). Three relevant cases for UAE-bound founders.
- Case 1, starting full-time work overseas. You meet the automatic full-time overseas test in the relevant overseas period.
- Case 2, partner of a Case 1 person. Your spouse moves under Case 1 and you move to join them.
- Case 3, ceasing to have a UK home. You stop having any UK home and remain without one for at least the rest of the tax year and the whole of the following tax year.
Split-year is not automatic. You claim it on the SA109 (residence pages) of your Self Assessment return for the year of move. Get the conditions wrong and HMRC denies the claim on enquiry. Most founders we see qualify under Case 1 if they have a UAE FZE or employment contract in place by the move date.