Statutory Residence Test Calculator

How the Statutory Residence Test works

The Statutory Residence Test (SRT) was introduced in Finance Act 2013, Schedule 45, and is the legal framework HMRC uses to determine whether you are UK tax resident for a given tax year. It applies to all individuals — whether you are a UK citizen living abroad, a foreign national working in the UK, or a UK expat who has relocated to Dubai, Abu Dhabi, or elsewhere in the UAE.

The SRT applies three tests in sequence. If any test gives a definitive answer, the remaining tests are skipped.

Test 1: Automatic Overseas Test

You are automatically non-UK-resident if any of these conditions are met: you were previously UK resident and spend fewer than 16 days in the UK; you were never UK resident and spend fewer than 46 days; or you work full-time overseas (averaging 35+ hours per week), spend fewer than 91 UK days, and have 30 or fewer UK work days.

For UK expats who have recently moved to Dubai or elsewhere in the Gulf, the first condition is most relevant. If you were UK resident in any of the previous three tax years and keep your UK visits under 16 days, you automatically qualify as non-resident without needing to consider ties.

Test 2: Automatic UK Test

If you spend 183 or more days in the UK during the tax year (6 April to 5 April), you are automatically UK tax resident. This applies regardless of your ties, work location, or any other factor. A UK day is counted under the midnight rule — any day you are present in the UK at midnight counts as one day.

Test 3: Sufficient Ties Test

If neither automatic test is conclusive, HMRC looks at how many UK ties you have combined with how many days you spend in the UK. The five ties are: family (spouse or minor child in the UK), accommodation (available UK property for 91+ consecutive days), work (40+ UK work days), the 90-day tie (90+ UK days in either of the two previous tax years), and the country tie (more UK days than any other single country — only relevant if previously resident).

More ties means a lower day threshold before you become UK resident. For example, a previously UK resident individual with 4 ties becomes UK tax resident at just 16 days. With no ties, the threshold is 183 days — the same as the automatic UK test.

The 90-day rule — why it's a myth

One of the most common misconceptions about UK tax residence is the so-called “90-day rule” — the belief that you can spend up to 90 days in the UK each year without becoming tax resident. This is not correct. There is no fixed 90-day threshold in the Statutory Residence Test.

The actual number of days you can spend in the UK depends entirely on your UK ties and your residency history. If you were previously UK resident and have four ties, your limit is just 15 days — not 90. Conversely, if you have no ties at all, you can spend up to 182 days in the UK without triggering the Sufficient Ties Test.

The confusion often arises from the “90-day tie” — one of the five UK ties under the SRT. The 90-day tie means you spent 90 or more days in the UK in either (or both) of the two previous tax years. Having this tie reduces your day allowance for the current year. But it is a tie, not a threshold. Use the calculator above to find your actual day limit based on your specific circumstances.

The midnight rule explained

Under the SRT, a “UK day” is any day on which you are present in the UK at midnight — that is, at the end of the day. This is known as the midnight rule. If you fly into London at 9am for a business meeting and leave at 8pm the same evening, that day counts as zero UK days because you were not present at midnight.

However, be aware of the deeming rule: if you have three or more UK ties and you make more than 30 such day-trips in a tax year, the excess trips beyond 30 are added to your UK day count even though you were not present at midnight. This prevents frequent same-day visitors from exploiting the midnight rule.

Worked example: UK expat in Dubai with 3 ties

Consider a UK national who moved to Dubai in 2024. They were previously UK tax resident, and for 2025/26 they have three UK ties: a family tie (spouse still in the UK), an accommodation tie (they still own their London flat), and a 90-day tie (they spent over 90 days in the UK in 2024/25 during the transition).

With 3 ties and a previous UK residence history, the Sufficient Ties Test limits them to 45 days in the UK for the 2025/26 tax year. If they have already spent 30 days visiting family and attending meetings, they have just 15 days remaining. Reducing even one tie — for example, by selling or renting out the London flat on a long-term lease to remove the accommodation tie — would raise their threshold from 45 to 90 days. This is why actively managing your ties is as important as counting your days.

Why this matters for UK expats in Dubai and the UAE

The UAE has no personal income tax, making it an attractive destination for UK nationals relocating from London, Manchester, or other UK cities. However, if you fail the SRT and are classified as UK tax resident, HMRC will tax your worldwide income — including your UAE salary, investment returns, and any capital gains. This can result in an unexpected UK tax bill running into tens of thousands of pounds.

Common mistakes include underestimating the impact of UK ties (keeping a family home, having children in UK schools, or frequent business trips to London), not tracking day-trips which may count under the deeming rule with 3+ ties, and assuming that having a UAE residency visa is sufficient to prove non-UK-residence. HMRC does not consider overseas visas when applying the SRT — only UK days and ties matter.