Moving into or out of the UK partway through a tax year raises an obvious question. Do you pay UK tax on the whole year, or only part of it?
UK tax residence rules normally look at the full tax year, from 6 April to 5 April, and settle your residence status for that entire period. But split year treatment can divide a single tax year into a UK part and an overseas part when specific conditions are met.
Split year treatment is not a test you apply on its own. It sits inside the Statutory Residence Test, and it only comes into play once you already count as a UK resident for the year under that test. Moving countries by itself does not switch it on. You still need to meet the conditions of one of eight specific cases HMRC recognises, and get the reporting right through your Self Assessment return.
Split year treatment lets part of a tax year be treated as a UK resident period and the rest as an overseas period, for certain tax purposes. It does not change your overall residence status for the year. You remain UK resident for the whole tax year under the Statutory Residence Test. What changes is how some of your income and gains get taxed during the part of the year spent overseas.
HMRC sets out eight sets of circumstances, known as cases, where split year treatment can apply. Cases 1 to 3 cover people leaving the UK. Cases 4 to 8 cover people arriving in the UK or returning. You only need to meet the conditions of one applicable case, though more than one can apply to your circumstances. Where that happens, priority rules in HMRC’s guidance decide which case takes precedence and where the split falls.
Split year treatment can apply to a range of situations, and most involve either leaving the UK for overseas work or family reasons, or arriving in the UK to take up work or move into a new home. You might qualify if you:
Simply moving abroad or arriving in the UK does not qualify you on its own. Eligibility depends on factors such as your residence status under the Statutory Residence Test, your work arrangements, the availability of a home in the UK or overseas, the exact date your circumstances changed, how much time you spend in the UK, and your residence position in the tax years before and after the one in question.
HMRC groups split year treatment into eight cases, each with its own conditions. The case that applies to you decides where the line falls between the UK part of the year and the overseas part. Below is a plain English summary of each one. For the complete tests, see HMRC’s Residence and FIG Regime Manual.
This case can apply when you leave the UK to begin full-time work overseas. You need to meet the automatic overseas test for full-time work, which includes limits on how many days you spend in the UK and how many of those count as UK workdays.
This case can apply when you leave the UK to live with a spouse, civil partner or qualifying partner who meets the conditions of Case 1. You do not need to be working overseas yourself. You need to move at the same time as them, or join them once they have already moved.
This case can apply when you leave the UK, stop having a home here, and set up your only home overseas. HMRC lists ceasing to have a UK home as one of the specific circumstances that can trigger split year treatment on departure.
This case can apply when you arrive in the UK and begin having a home here, whilst also meeting the related conditions about not having an overseas home for a set period.
This case can apply when you begin full-time work in the UK and meet the third automatic UK test over a 365 day period, with enough of your working days in the UK.
This case can apply when you return to the UK after a period of full-time overseas employment ends.
This case can apply when you return to the UK alongside a partner who qualifies under Case 6.
This case can cover certain people who begin living in the UK and meet the relevant residence and home conditions, where none of the earlier arrival cases apply.
People leave the UK for a variety of reasons. Common ones include starting a job abroad, moving with a spouse or partner who has taken overseas work, selling or renting out a UK home, and setting up a permanent home in another country. Our page on UK tax residence and domicile covers this in more depth, but the date you physically leave is not always the date your tax year splits.
The split date depends on which case applies and when all its conditions are actually met. Someone who leaves the UK in June but does not start their new overseas job until September, for example, might find the split falls in September rather than June. Getting this date right matters, because it decides which income and gains fall into the UK part of the year and which fall into the overseas part.
James left the UK in September to start full-time work overseas. He limits his UK visits and keeps his UK working days low, and he meets the conditions of the automatic overseas test for full-time work. His tax year is likely split into a UK part before he leaves and an overseas part from the date his overseas work begins. This is a simplified example, and real cases depend on every applicable condition being met, so it is worth checking your own position carefully.
Arriving in the UK raises the same kind of question in reverse. Common situations include returning after a spell of overseas work, starting a new job in the UK, buying or renting a home here for the first time, and moving with a partner who has stopped working abroad.
Maria moved to the UK in November, sets up her home here and meets the Statutory Residence Test for the year. If she also meets the conditions of an applicable split year case, the part of the year before she arrived may be treated as the overseas part, with the period after treated as the UK part. Someone arriving in the UK partway through a tax year should look at this in their first year of UK residence, since it affects how much of that year’s income counts under UK rules.
The tax result depends on several things working together, including the type of income or gain, when it arose, its source, the split year case that applies, other UK tax rules, and any double taxation agreement covering the countries involved.
Income that arises during the UK part of a split year generally falls under the normal rules that apply to UK residents. This can include employment income, self-employment income, rental income, interest, dividends and pension income.
Foreign income tax treatment during the overseas part of a split year depends on the type of income and the specific rules that apply to it, so it is not automatic across the board. Not all income earned after you leave the UK is tax free, and the details matter.
UK-source income can remain taxable in the UK even during the overseas part of a split year, though the exact position depends on your circumstances. Examples include income from UK property, some UK employment income, UK business income, certain pension income and some capital gains.
Split year treatment is not something you elect for as an optional choice, in the way some tax reliefs work. If you are UK resident for the year and meet all the conditions of an applicable case, the treatment applies under the rules themselves. HMRC does not need to approve it before it takes effect.
That said, you still need to tell HMRC about your residence position through the correct reporting process. Getting the facts and dates right on your tax return matters just as much as meeting the underlying conditions, because HMRC uses what you report to check your position.
If you complete a Self Assessment tax return, you will normally report your residence position through the residence pages, commonly known by their form number, SA109. This form sits alongside your main SA100 return, and you may need to provide:
HMRC’s residence and foreign income notes for the current tax year include guidance aimed at taxpayers who may meet the split year criteria. Forms and filing procedures do change from year to year, so it is worth checking the latest instructions on the SA109 page before you file, or getting help from our Self Assessment tax return service.
Good records back up the dates and circumstances behind your residence calculation. HMRC can ask questions about your residence position, and having the right paperwork ready makes an HMRC enquiry far more straightforward. Useful records include:
These records should support the dates and circumstances you use in your residence calculation. Gaps between what you claim and what you can show are a common reason HMRC asks further questions.
A few mistakes come up again and again with split year treatment, and most stem from treating the rules as simpler than they are.
Moving into or out of the UK is not enough by itself. You still need to meet the Statutory Residence Test and satisfy the conditions of an applicable split year case.
The date your tax year actually splits can depend on when your employment starts, when a home becomes available, or when other specific conditions are met, rather than the day you physically travelled.
Time spent working or staying in the UK after you leave can still affect your eligibility for split year treatment, so these visits are worth tracking carefully.
The source and timing of income matter a great deal. Some overseas income can still be taxed in the UK, depending on your circumstances.
UK rental income and other UK-source income may still need to be declared, even during the overseas part of a split year.
Tax residence is a separate concept from nationality, citizenship and domicile, and mixing these up can lead to incorrect assumptions about your tax position.
HMRC may ask for evidence of travel, employment and living arrangements, and gaps in your records can make it harder to support the position you have taken on your return.
Sometimes a person counts as resident under the domestic tax rules of two different countries at once. A double taxation agreement between the UK and the other country can help work out which country has the primary right to tax specific income, if foreign tax credit relief is available, and how employment income, pensions, dividends or property income get treated between the two.
If you are UK resident for a year but do not qualify for split year treatment, a relevant tax treaty might still limit the UK’s right to tax certain income from before you arrived or after you left, and double taxation relief may be available to prevent the same income being taxed twice. Cross-border situations like this get complicated quickly, and professional input is worth getting when two countries are involved.
Split year treatment often comes up alongside other cross-border tax questions, and our expat tax advice team deals with these regularly. Speaking to a tax adviser is worth considering if you:
It might apply, but leaving halfway through the tax year is not enough on its own. You need to be UK resident for the year under the Statutory Residence Test and meet all the conditions of an applicable departure case.
It can apply when you return and meet one of the arrival cases, such as starting full-time work or setting up a home in the UK.
Not necessarily. The split date depends on the case that applies to you and the date its conditions are actually met, which is not always the same as your travel date.
Not automatically. It depends on the source and timing of the income, your residence circumstances, and the tax rules that apply to that type of income.
This depends on your filing circumstances and the income or gains you receive. People who already file Self Assessment may need to complete the residence related supplementary pages, form SA109, as part of their Self Assessment tax return.
SA109 is the supplementary section used to report your residence status, and related information, alongside your main UK Self Assessment return.
Yes. Specific residence and capital gains rules can apply to assets sold during the UK or overseas part of a split year. Getting advice on property, shares or other valuable assets is often worthwhile.
Not generally. It is not something you can freely opt into or out of. It applies when the legal conditions of an applicable case are met.
Split year treatment can divide a qualifying tax year into a UK part and an overseas part, but the rules behind it reward accuracy and punish guesswork. You need to establish your residence position under the Statutory Residence Test first, then check you meet an applicable split year case. The split date depends on your specific facts, UK-source income can remain taxable even after you leave, and solid travel, work and accommodation records make the whole process far easier.
Moving into or out of the UK can create tax questions that are easy to get wrong and costly to fix later. Our team at ETC Tax can help you review your residence position, work out which split year case applies, and handle the reporting on your Self Assessment return correctly the first time. Get in touch with our team to talk through your situation.
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