How many days can I stay in the UK without becoming a UK tax resident?

For arrivals (not UK resident in the previous three tax years), fewer than 46 days in the tax year makes you automatically non-resident regardless of ties. From 46 days the sufficient ties test decides: 46–90 days needs all 4 ties to make you resident, 91–120 needs 3, 121–182 needs 2. At 183 or more days you are automatically resident.

Does the day I arrive in the UK count?

Yes — and the day you leave does not. A day counts if you are present in the UK at the end of the day, so a stay from 6 June to 20 June counts 14 days (6th through 19th) and a same-day visit counts for nothing.

What are the five UK ties?

Family (partner or minor children in the UK), accommodation (a place to live available for 91+ continuous days with at least 16 nights of use), substantive UK work (40 days of more than 3 hours), 90-day UK presence in either of the previous two tax years, and — for leavers only — having your only country of residence overseas. The more ties, the fewer days it takes.

I used to be UK resident. What changes?

The automatic overseas threshold tightens from 46 to 16 days, and the ties bands loosen one step: 16–45 days makes you resident with 4 ties, 46–90 with 3, 91–120 with 2, and 121 or more with just 1. Previous residency is assumed away by our calculator — it states this as a boundary.

Why does the UK tax year start on 6 April?

The Statutory Residence Test runs over the UK tax year (6 April to 5 April). A December trip and a February trip belong to the same tax year, which a calendar-year calculator would split — one of the reasons UK results differ from other countries.

The UK Statutory Residence Test, explained properly

The UK replaced its old day rules in 2013 with a three-layer test — and most online "UK 183-day calculators" still describe only the top layer. Here is how the whole machine works, pinned to Finance Act 2013, Schedule 45, verified against the statute text.

Layer 1: the automatic overseas tests

Applied first. If any is met, you are non-resident for the year and the other layers never run. The two day-based ones:

Arrivals (para 13): you were UK resident in none of the previous three tax years, and you spend fewer than 46 days in the UK — automatically non-resident, whatever your ties.
Leavers (para 12): you were UK resident in at least one of the previous three years, and you spend fewer than 16 days — automatically non-resident.

There are three more (full-time work overseas, death in the year, previously-considered non-resident), but the two above carry most planning weight. This is why our calculator's headline answer for arrivals is "below 46 days → not resident, this test".

Layer 2: the automatic UK tests

Next: if any automatic UK test is met, you are resident for the year. The day-based one is 183 or more days of presence in the tax year (para 7). Two more catch people with low day counts: having your only home in the UK (used for at least 30 days of a 91-day period), and full-time work in the UK (365 days with no significant break, more than 3 hours a day on 75%+ of workdays).

Layer 3: the sufficient ties test

Everyone else falls through to the ties test: the more UK connections you have, the fewer days it takes to make you resident. The statute prints two tables (paras 18–19) — and they differ by prior residency:

Days in UK (tax year)	Leavers (para 18)	Arrivals (para 19)
16–45	4 ties	— (already non-resident: auto overseas)
46–90	3 ties	All 4 ties
91–120	2 ties	3 ties
121–182	1 tie	2 ties
183+	automatic UK resident (layer 2)

The five connectors are family, accommodation (a UK place to live available for a 91-day period and used at least 16 nights), substantive UK work (40 days of more than 3 hours), a 90-day tie (90+ UK days in either of the previous two tax years), and — leavers only — having the UK as your only country of residence. Arrivers face the harsher column: between 46 and 90 days, every single connector must be present.

How the UK counts days — end-of-day

UK counting is unusual and often got wrong: a day counts if you are present in the UK at the end of the day. Arrive 6 June, leave 20 June → present at the end of 14 days (6th through 19th); the departure day itself does not count, and a same-day visit counts for nothing. There is also a deeming rule (para 23): leavers with 3+ ties whose "qualifying days" (present at some point but not at the end) exceed 30 have the excess days deemed to count.

And the window is the UK tax year, 6 April – 5 April — not the calendar year. A December trip lands in the tax year ending the following 5 April.

Check your own numbers

The UK tax residency calculator runs the automatic tests over your actual travel ledger with end-of-day counting and the 6 April window. Inside the ties band it reports honestly that the outcome depends on your ties rather than guessing — and your same ledger is evaluated against 13 other countries' rules in one pass. Moving mid-year? The UK split-year wizard applies the Part 4 case tests with prorated thresholds. Planning a move to the continent afterwards? See the 183-day rule in Europe.

Rule text verified 2026-09-30 (against statute text)

Finance Act 2013, Schedule 45 — paras 7 (auto UK 183), 12–13 (auto overseas under 16/under 46 days), 17–19 (sufficient ties test and tables), 23 (deeming rule) — official text
HMRC guidance — the former RDR3 manual now lives in the Residence and FIG Regime Manual — official collection

Informational only — not tax advice. Split-year treatment (Part 4 of Sch 45), treaty positions and the ties themselves are facts no calculator can see. Confirm with a qualified UK cross-border adviser.