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clientservices@lsrpartners.comMost people planning to leave the UK focus on day counts. How many days can I spend here? When do I need to be gone? What they often miss is that the statutory residence test can make you a full year UK tax resident from a single day in the country. Day counts do not always come into it.
Most people who are planning to leave the UK focus on day counts. How many days can I spend here? When do I need to be gone by? What ties do I still have?
It is a reasonable place to start. But it misses something important.
The statutory residence test can make you a full year UK tax resident from a single day in the country. In certain circumstances, day counts do not come into it at all. That is the reality Simon Roue and Laura Sant tackle head-on in Episode 22 of the Tax Compass Podcast, which covers split year treatment in full: what it is, why it exists, and why getting it wrong can expose you to UK tax on your worldwide income for an entire year.
The UK tax year runs from the 6th of April to the 5th of April. That calendar is out of step with almost every other country in the world. When someone moves into or out of the UK part way through a tax year, a strict full-year residency test would create obvious problems. Someone who arrives in the UK in January and starts work would technically be a UK tax resident for the entire year, including the nine months they spent living somewhere else entirely.
Split year treatment exists to address that. It allows the tax year to be divided into two portions: one where UK tax residence applies and one where it does not. But there is an important starting point that people often miss. You have to have been UK tax resident for the full year before split year treatment becomes relevant. It is not an alternative to the statutory residence test. It operates within it.
The outbound rules are more demanding than the inbound ones. There are three cases.
Case one covers starting full-time work outside the UK. It is the most commonly used outbound route for people going on overseas assignment, but it comes with a condition that is easy to overlook. You must also meet the full-time work overseas test in the following tax year. HMRC will not allow someone to split their year on the basis of starting work abroad if they are back in the UK within a few months. The requirement is there to prevent manipulation, and for most people going on a genuine long-term assignment it will not cause problems. But for anyone whose circumstances change unexpectedly, it absolutely can.
Simon describes a client currently in exactly that position. They left the UK, took up an overseas role, and then lost the job when circumstances changed. That kind of unforeseen situation can put the entire split year position at risk, and it is one of the reasons why taking advice before you move matters so much.
Case two covers being the partner of someone starting full-time work outside the UK. The same requirements apply.
Case three covers ceasing to have a home in the UK, and it is the only outbound route available to retirees who are not working. It is also, as Laura points out, one of the more interesting cases in the whole statutory residence test.
From the point you cease to have a home in the UK, you are limited to a maximum of 15 midnights back in the UK. People who plan to spend a few extra days here after moving out need to be careful: those days start counting immediately. Case three also requires you to have links in another country within six months of leaving, whether that is a home, tax residence or simply physical presence. That condition is designed to stop people using the test to become digital nomads without genuinely establishing themselves elsewhere.
The definition of home matters here too. Under the statutory residence test, a home has its everyday meaning. A property that has been emptied of belongings and rented out is no longer a home, even if it has not been sold. Simon and Laura describe a couple who relocated to New Zealand to retire, packed up their flat, moved their furniture out and left the next day. The flat had not sold, but it was no longer their home. The substance of what they were doing was clear, and the rules reflected that.
One of the most common scenarios LSR Partners encounters is someone going to work in the Middle East while their family remains in the UK. The home stays. The family stays. The individual goes.
This arrangement creates real risk. If circumstances change and the person returns to the UK before the full tax year following the split year has passed, they may not have broken UK tax residence at all. The starting point for UK tax is worldwide income. If residence has not been cleanly broken, HMRC can look at everything.
This is not a theoretical concern. It is a situation that arises regularly, and it is one where early advice makes the difference between a clean outcome and a very expensive one.
The inbound rules are more numerous. There are cases covering starting to have a home in the UK, starting full-time work in the UK, ceasing full-time work outside the UK, and being the partner of someone doing so. The matrix of cases and the order in which they take priority is, as Laura puts it, complex enough to fill a spreadsheet.
The practical reality is simpler. If you arrive in the UK, take a job and get a home, you will be tax resident from the point those things happen. The technical complexity on the inbound side is mostly relevant to edge cases. One worth knowing: someone who arrives in the UK very late in the tax year and has never lived here before may still fall within the automatic non-residence tests, depending on how many days they have spent here and when they arrived.
Simon describes a situation where someone started work on the 1st of March. That left fewer than 46 days in the tax year. Because of how the flowchart nature of the residence tests works, they remained non-resident for that year. Those situations are not common, but they do arise.
One of the more interesting planning points in the episode is what happens when someone breaks UK tax residence before becoming tax resident somewhere else.
A classic example: someone leaves the UK in October to start work in Spain, but does not become Spanish tax resident until the 1st of January. Between October and the end of the calendar year, they are technically not tax resident anywhere.
For employment income, this can create genuine planning opportunities. Employment income is sourced to where the work is actually done, so income earned in that window may not be taxable in either country.
Pension income is a different matter entirely. Pension income is sourced to the UK. It remains taxable here unless a double tax treaty provides relief, and that relief only applies if the individual is paying tax somewhere else. Laura flags this point directly in the episode, and it is one that people in or approaching retirement need to be aware of.
Split year treatment is technical. The cases on the way out each carry their own requirements. The sequence of events matters. The timing matters. And the consequences of getting it wrong, whether that means failing to break residence at all or losing the split year position through a change in circumstances, can be significant.
Simon and Laura make the same point they make throughout the Tax Compass Podcast: have the conversation before you make the move. The wrong sequence of events, even by a matter of days, can close off options that would otherwise have been available to you.
Episode 22 of the Tax Compass Podcast is available now on Spotify, Apple Podcasts, YouTube and wherever you get your podcasts.
If you are considering a move and want to understand how split year treatment applies to your situation, book a call with us at lsrpartners.com. LSR Partners help you pay the right tax in the right place at the right time.
LSR Partners help you pay the right tax in the right place at the right time. Book a call with us at lsrpartners.com.
This article is for general information purposes only and does not constitute tax advice. Your individual circumstances will affect how these rules apply to you. Please contact us to discuss your specific position.
You can listen to the full episode of the Tax Compass Podcast here.
