Tax residency in the UK
Last updated
The most mechanical residency system in the world. It counts your midnights, crosses them with your ties, and settles residency by a table. Your personal limit could be 16 days, or 182.
Quick facts · United Kingdom
- Income tax 20–45%
- Residency test SRT · 16–183 days
- How a day counts Midnight rule
- Temporary non-residence 5 years
- VAT 20%
- Treaty network 130+ DTAs · CRS
Why it matters now
The world's most mechanical residency test, at the moment of its biggest exodus.
The Statutory Residence Test turns residency into arithmetic: midnights counted, ties tallied, the answer read off a table. And since the non-dom regime ended in April 2025, the largest wave of high-value departures in decades now has to prove, year after year, that they stay under their day limit.
- Top rate
45% income tax
Progressive from 20% to 40% and a top additional rate of 45% above £125,140. Residents are taxed on worldwide income. Scotland sets its own bands.
- The exodus
Non-dom abolished
The remittance basis ended on 6 April 2025. Thousands of non-doms and high earners are leaving, each now a "leaver" who must watch UK days for years.
- Treaties
130+ DTAs
One of the world's largest double-taxation treaty networks, plus CRS automatic exchange. HMRC receives foreign financial-account data automatically.
- The test
16 to 182 days
There is no single number. Your day limit depends on your ties: a leaver with four ties is resident at 16 days; with one tie, not until 121.
- The trap
5-year tail
Temporary non-residence claws back gains if you return within 5 years. A leaver must count days consistently for at least five full tax years.
- New regime
4-year FIG
Arrivers after 10+ years abroad get 0% on foreign income and gains for 4 years, at the cost of their personal allowance and CGT exemption.
The test
The Statutory Residence Test, in three layers
The SRT (Finance Act 2013, Schedule 45) is applied to each tax year, 6 April to 5 April, in order. You work down the layers until one gives an answer.
- Layer 1
Automatic overseas tests
Meet one and you are automatically non-resident: fewer than 16 days in the UK if you were resident in any of the prior 3 years; fewer than 46 days if you were not; or full-time work abroad (averaging 35 hours a week) with fewer than 91 days in the UK and fewer than 31 UK working days.
- Layer 2
Automatic UK tests
Meet one and you are automatically resident: 183 days or more in the tax year; the home test (a UK home available for 91+ consecutive days, present there on at least 30 days in the year); or full-time work in the UK across a 365-day period.
- Layer 3
The sufficient ties test
If no automatic test decides, residency turns on how many of the five ties you have, crossed with your days. This is where most real cases land, and where a day here or there flips the result. It is the heart of the SRT, and of the day count.
- The five ties
Family, home, work, 90-day, country
Family (UK-resident spouse or minor child), accommodation (available 91+ days, used at least once), work (40+ UK working days), the 90-day tie (90+ days in either of the last 2 years, so the app must look back), and the country tie for leavers (the UK is where you spend most midnights).
The numbers
Tax rates
The UK taxes residents on worldwide income at progressive rates. Getting the residency question wrong is what puts foreign income and gains into scope.
For 2025/26, income tax runs from a 20% basic rate above the £12,570 personal allowance, through 40% above £50,270, to a top additional rate of 45% above £125,140. The personal allowance itself tapers away between £100,000 and £125,140. Capital gains tax for individuals is 18% within the basic-rate band and 24% above it (rates raised in the October 2024 Budget), with a £3,000 annual exempt amount. Dividends are taxed at 8.75%, 33.75% or 39.35% above a £500 allowance, and VAT is 20%. Scotland sets its own income tax bands.
None of this reaches your foreign income and gains while you are non-resident, which is precisely why the day count matters so much. Cross your SRT threshold and worldwide income comes into charge, the 183-day line being only the most obvious of several ways in.
Top marginal income tax rate: UK vs common leaver destinations
Top marginal rates on personal income (2026). The gap to 0% Dubai is why leavers move, and why they must prove they stayed under their UK day limit.
Inheritance tax now follows residence, not domicile. Since 6 April 2025, your worldwide estate is within the 40% IHT net (above the £325,000 nil-rate band) if you have been UK resident for at least 10 of the previous 20 tax years, with a "tail" of 3 to 10 years after you leave. For a leaver, that is one more reason to document complete years of non-residence, cleanly and continuously.
Counting days
The rules that break a spreadsheet
The SRT does not count days the way people assume. Four rules decide whether a day is yours or HMRC's, and each one is a place where a manual tally quietly goes wrong.
- Midnight rule
Where you sleep counts
A day counts if you are in the UK at midnight at the end of it. Leave before midnight and it generally does not count, with exceptions. Your whole year turns on where you were at 00:00, every night.
- Deeming rule
Partial days can count
If you were resident in one of the last 3 years, have 3+ ties, and rack up more than 30 days present without a UK midnight, every such day from the 31st counts as a full day. A midnight-only counter misses this entirely.
- Transit days
Connections may be free
A transit arrival does not count if you pass through on a through ticket and leave the next day without doing anything unrelated to travel. Dinner at the hotel is fine; a meeting, the cinema or seeing family makes the day count.
- Exceptional
Capped at 60 days
Days you are stuck in the UK by unforeseeable events outside your control can be ignored, but only up to 60 days per tax year across all events. HMRC's own example: five months hospitalised still leaves 142 countable days.
The deeming rule is the one that catches commuters. Someone based in Monaco or Dublin with a London business can leave before every midnight and still become resident, because from the 31st qualifying day those partial days are deemed full. It is invisible on a boarding-pass tally, and it is exactly the kind of thing HMRC reconstructs in an enquiry.
And each year stands alone. The SRT is assessed tax year by tax year, and split-year treatment can carve a single year into resident and non-resident parts under eight defined cases. You cannot average across years or opt out. The only defence is a continuous, day-level record you can put in front of HMRC.
How HMRC watches
HMRC is data-driven and documentary. A residence enquiry asks you to prove your days one by one, and the burden of showing you stayed under your limit sits with you, not with them.
What HMRC sees
- CRS automatic exchange: foreign account data from 100+ jurisdictions, arriving automatically from your new country of residence.
- Nudge letters and enquiries: "we believe you may have been UK resident" prompts that ask for day-by-day evidence going back years.
- The deeming and midnight rules: applied to your actual movements, including partial days you may not have logged.
- Travel and border data: cross-referenced against the days and ties you declare on your return.
What you can prove
- A certified record of where you were at midnight, every night, that HMRC can verify independently.
- The partial days logged too, so the deeming rule can't surprise you three years later.
- Continuous evidence across five-plus tax years, the span temporary non-residence demands.
- An enquiry-ready pack that shifts the argument from your word to the record.
HMRC counts your midnights. The only question is whether you can too.
Traps & timing
Where UK leavers get caught
The SRT is full of edges that only show up in an enquiry. These are the ones that catch expats and leavers most often.
- Trap
Temporary non-residence
Return within 5 years, after being resident 4 of the prior 7, and gains realised abroad are taxed on your return. You need "5 years and a day".
- History
The 90-day tie
Spend 90+ days in the UK in either of the last 2 years and you carry a tie into this year. The count looks backwards, so the past shrinks your limit now.
- Timing
Split-year cases
Eight cases can split a year into resident and non-resident parts, and they apply automatically when the conditions are met. You don't get to choose.
- Trap
The home test
Keep a UK home available and spend just 30 days there, and an automatic UK test can make you resident regardless of how few total days you spent.
- IHT
Long-term residence
From April 2025, IHT follows residence: worldwide estate in scope after 10 of 20 years resident, with a 3 to 10 year tail after leaving.
- Onus
Weak evidence
Boarding passes fade and spreadsheets don't hold up. In an SRT enquiry, if you can't prove the days, HMRC's view of your residence stands.
Your solution
How ResidenceSafe handles the SRT
Built for the most literal day-counting test in the world: track your midnights and partial days, know your personal limit, and hold proof for the five years HMRC can reach back.
- Track
Midnight and partial days
Counts your UK midnights and logs partial days too, so the deeming rule can't catch you. Alerts before you approach your personal ties-based limit.
- Know your number
Your ties-based limit
Set your ties and prior-year history and see your actual day allowance, 16, 45, 90, 120 or 182, and how much of it you've used this tax year.
- Certify
Evidence for HMRC
Each check-in is biometrically verified, geolocated and timestamped with eIDAS 2 compliance, tamper-proof for an enquiry.
- Five years
Multi-year continuity
Temporary non-residence spans 5+ years. Keep an unbroken record across every tax year so a single gap can't undo the whole departure.
- Report
Enquiry-ready packs
Export a certified presence report in the shape HMRC asks for, ready to answer a nudge letter or a full residence enquiry.
Calendar
Key dates
The UK tax year runs 6 April to 5 April. Self Assessment deadlines follow it.
- 6 Apr Tax year begins (runs to 5 April the following year)
- On leaving File form P85 to tell HMRC you have left the UK
- 5 Oct Register for Self Assessment if newly required
- 31 Oct Paper Self Assessment return deadline
- 31 Jan Online Self Assessment return and payment deadline
- 5+ years Minimum non-residence to escape temporary non-residence
FAQ
Frequently asked questions
How does the UK determine tax residency?
The UK uses the Statutory Residence Test (Finance Act 2013, Schedule 45), assessed for each tax year (6 April to 5 April). It has three layers: automatic overseas tests (which make you non-resident, e.g. fewer than 16 days if you were resident in any of the prior 3 years), automatic UK tests (which make you resident, e.g. 183 days or more), and the sufficient ties test, which combines your days in the UK with personal ties to decide the rest. It is a mechanical, day-counting test.
How few days can make me UK tax resident?
As few as 16. A "leaver" (someone resident in at least one of the previous three tax years) with four sufficient ties becomes UK resident at just 16 to 45 days. The thresholds scale with ties: 46 to 90 days with three ties, 91 to 120 days with two ties, 121 to 182 days with one tie. Your personal limit depends on how many ties you have, so two people can have very different day allowances.
What is the midnight rule and the deeming rule?
The midnight rule means a day counts if you are in the UK at midnight at the end of it (leaving before midnight generally means the day does not count). The deeming rule is an anti-avoidance measure: if you were resident in one of the prior three years, have at least three ties, and spend more than 30 days in the UK without being present at midnight, every such "qualifying day" from the 31st onwards counts as a full day. A simple midnight counter misses this, so partial days must be tracked too.
What is temporary non-residence?
If you were UK resident in at least 4 of the 7 tax years before leaving, and you return within 5 years or fewer, HMRC taxes certain income and gains you realised while abroad on your return. To escape it you generally need to be non-resident for more than 5 years ("5 years and a day"). This is why a leaver must keep counting days consistently for at least five full years, not just the year of departure.
What is the FIG regime that replaced non-dom status?
From 6 April 2025 the remittance basis and non-dom regime were abolished and replaced by the 4-year Foreign Income and Gains (FIG) regime. A new UK resident who was non-resident for at least the previous 10 consecutive tax years can claim 0% UK tax on eligible foreign income and gains for their first 4 years of residence, but loses the personal allowance and the CGT annual exempt amount for years they claim it.
How does UK inheritance tax work for leavers now?
There is no single exit tax, but temporary non-residence can claw back gains if you return within 5 years. From 6 April 2025, inheritance tax follows long-term residence rather than domicile: your worldwide estate is in scope if you were UK resident for at least 10 of the previous 20 tax years, with a "tail" of 3 to 10 years after you leave. Both rules reward documenting complete years of non-residence.
Sources. Based on official sources as of July 2026: HMRC RDR3 Statutory Residence Test, Finance Act 2013 Schedule 45, GOV.UK income tax rates, GOV.UK FIG regime, GOV.UK IHT long-term residence.
Disclaimer. This guide is for general information only. The Statutory Residence Test, its ties and counting rules, the FIG regime and inheritance tax rules are detailed and change frequently. It does not constitute legal, tax, or immigration advice, always consult a qualified professional for your situation.
HMRC counts your midnights. ResidenceSafe counts them with proof.
Track every day from the moment you leave. You can't reconstruct a midnight three years later when HMRC asks.
Learn more: the 183-day rule · expats · Saudi Arabia · all country guides