Is there a UK exit tax? What leaving actually triggers

The United Kingdom does not have an exit tax on individuals. There is no charge that crystallises because you left, no deemed disposal of your portfolio on the day your residence ends, and no departure return to file that settles a tax bill on unrealised gains. If you have arrived here after reading about Canada’s departure tax or Australia’s CGT event I1, the honest answer is that the UK simply did not follow them.

That matters, because the searches that lead people here are usually a proxy for a different and more consequential set of questions. Nothing charges you for leaving. Several things determine whether you have actually left, and one of them can reach forward and tax you years later if you come back.

What people mean when they search for a UK exit tax

Four distinct concerns tend to sit behind the phrase, and they have four different answers.

“Will my unrealised gains be taxed when I go?” No. Your assets are not deemed disposed of on departure. You keep your original acquisition cost, and a later disposal is taxed — or not — by reference to your residence status at the time of that disposal.

“When do I stop being UK resident?” That is the Statutory Residence Test, and it is decided for a whole tax year rather than on the date your flight left.

“Will the UK still tax me after I go?” On UK-source income, generally yes. Rental profits from UK property, and gains on UK land and property, remain within the UK net for non-residents. That is a source rule, not an exit charge.

“If I come back, does any of this unwind?” Sometimes. This is the temporary non-residence regime, and it is the closest thing the UK has to a departure charge — except that it triggers on return rather than on departure.

What actually governs leaving: the Statutory Residence Test

Residence is not something you elect out of by moving. The Statutory Residence Test decides it for each tax year, running from 6 April to 5 April, through an ordered sequence: the automatic overseas tests first, then the automatic UK tests, then sufficient ties.

The numbers that matter on the way out are the automatic overseas ones. Someone who was UK resident in any of the three prior tax years is a leaver, and a leaver is automatically non-resident with no more than 15 UK midnight days in the year. Working full-time overseas without significant breaks raises the allowance to 90 UK days, subject to conditions on hours and on how many of those days are workdays. Reaching 183 UK days makes you resident whatever else is true.

Between those points, residence depends on how many UK ties you retain against your day count — family, accommodation, work of more than 40 UK workdays, the 90-day tie, and for leavers the country tie. The practical consequence of an emigration is therefore counted in days and ties, not paid in tax.

Two mechanical points catch people. A UK day is a day you were in the UK at midnight, so a same-day visit is not a UK day. And the 30-day deeming rule means that for leavers with three or more ties, frequent same-day visits stop being free once that threshold is passed. The SRT calculator works the sequence through in order.

Split-year treatment: the year you leave

Because residence attaches to a whole tax year, the year of departure would otherwise be an all-or-nothing affair. Split-year treatment softens that, dividing the year into a UK part and an overseas part so that foreign income and gains arising after you go fall outside the UK charge.

It is narrower than most people assume. It applies only if you are UK resident for the year under the SRT, it operates through eight statutory cases checked in a priority order, and each case has its own conditions on homes, work and days. It is not a general apportionment and it is not elective. The detail is in split-year treatment.

Temporary non-residence: the rule that reaches forward

This is the provision that people are half-remembering when they search for an exit tax, and it is worth stating precisely because it operates in the opposite direction.

If you were UK resident in at least four of the seven tax years immediately before the year you left, and your period of non-residence is five years or less, you are a temporary non-resident. Certain income and gains realised during the period away are then charged in the year you resume UK residence, as though they had arisen then.

The catch-up covers capital gains on assets held before departure, and a specified list of income items: distributions from close companies, certain pension withdrawals and lump sums, remitted foreign income for former remittance-basis users, loans to participators written off, and life policy gains. It does not sweep in everything. Employment income earned abroad while genuinely non-resident stays outside, and gains on assets acquired after you left are generally unaffected.

The consequence for planning is straightforward and rarely appreciated. Realising a large gain in the first year abroad, then returning inside the window, produces a UK charge that would not have arisen had the return been later. The clock is measured in tax years and in residence status, both of which come back to day counts.

The charges that genuinely do exist

Exit charges exist in UK law, but not on individuals.

A company that ceases to be UK resident is treated as disposing of its assets at market value immediately before migration, giving rise to a corporation tax charge with a deferral regime in some European cases. A trust that becomes non-resident faces an equivalent deemed disposal. Neither applies to a person.

Individuals leaving retain exposure to non-resident capital gains tax on UK land and property, and to income tax on UK-source income, most commonly rental profits under the non-resident landlord scheme. Employment income for duties performed in the UK stays taxable here. None of these is triggered by departure; they persist because the source is here.

There is also an administrative step rather than a charge: the P85, which tells HMRC you have gone and starts the process of reclaiming overpaid PAYE.

What Residay tracks

Because there is no exit charge, the entire question of what leaving costs you resolves into whether you were resident, and residence resolves into days.

Residay records where each day belongs and applies the UK midnight convention rather than the set-foot convention people carry in their heads. It tracks leaver and arriver status from your residence history, counts qualifying departure days against the deeming threshold, and separates UK workdays from ordinary presence, because the work tie and the full-time-overseas test need them apart. It keeps the record dated as you go, which is the only form in which it is useful when a question arrives about a tax year that closed three years ago.

Planning notes

• The tax year boundary on 6 April is the pivot of everything. A departure in late March and one in early April sit in different tax years and can produce entirely different outcomes.
• If you may return, know your temporary non-residence window before you realise a gain abroad, not after. The rule is the one genuine trap in an otherwise charge-free departure.
• Split-year treatment is not automatic relief for a mid-year move. Check which case you fall in, and whether you meet its conditions, before assuming the year divides.
• Keep the day record from the year of departure, not just the years after it. The automatic overseas tests are decided on that year’s count, and it is the year people document least.