The Statutory Residence Test: 10 ways to accidentally become UK tax resident

The top 10 common pitfalls

1. Spending too many days in the UK without tracking
   The SRT is highly sensitive to day counts. But what counts as a day? Under the SRT, a day is measured as midnights spent in the UK. So, beware, just one extra midnight can tip you into residence.
2. Thinking “183 days is the only rule”
   Many assume staying under 183 days in a tax year = non-resident. In reality, you can become UK resident with far fewer days if you have UK ties. Exceptionally, 16 nights or fewer in a tax year is the only ‘safe’ number.
3. Keeping a UK home “just in case”
   A property available for 91+ days creates an accommodation tie. You only need to stay there one night for it to count, or 16 nights if it’s a close relative’s home.
4. Working casually while in the UK
   A workday is defined as 3+ hours. Just 40 UK workdays create a work tie. Work here includes emails, telephone calls, research and board meetings.
5. Having family based in the UK
   Having a spouse or minor children in the UK = family tie. Even children under 18 at a UK school can trigger this unintentionally.
6. Not understanding the 90-day tie
   If you spent more than 90 days in the UK in either of the previous two tax years, you carry a tie forward. This means that past behaviour affects current residence risk.
7. Assuming leaving mid-year makes you non-resident
   Split year treatment is not automatic. If strict conditions aren’t met it could mean you are deemed to be a full-year UK resident.
8. Failing the full-time overseas work test
   To meet the full-time overseas work test you need to work around 35 hours per week and there should be no significant breaks. This means that even short gaps or leave can break the test - particularly common with contract-based roles.
9. Ignoring “the country in which you spend the most days”
   If the UK is your most visited country, you may trigger the country tie. So, if you visit a number of countries, a surprisingly small number of days in the UK may still see you classified as UK resident. This means one may need to track global as well as UK days.
10. Relying on “intent” rather than facts
    There you have it - our top 10 common mistakes when applying the SRT – and there are a lot more that can be made. Good financial planning and a keen eye on the detail is required to avoid mistakes. And remember, it only takes one mistake for an individual to accidentally become a UK tax resident.