Leaving the UK partway through the tax year: what split-year treatment means for your return

If you moved abroad partway through the tax year, you may come across a question on your tax return asking whether your only home during that year was in the UK. This matters more than it looks: your answer feeds into what's called the Automatic UK Residence Test, which is one of the ways HMRC works out whether you count as UK resident for tax purposes. If you actually only had one home, and it was in the UK, for part of the year before you left, that section needs to reflect that accurately - getting it wrong can change your overall residence position for the whole tax year.

When you leave the UK during the tax year rather than at the very start or end of it, you then need to consider something called split-year treatment. This is a way of splitting a single tax year into two parts: a period when you're treated as UK resident, and a period when you're treated as non-resident from the point you meet certain conditions. Importantly, split-year treatment is not automatic just because you moved abroad partway through the year - it only applies if you meet specific conditions set by HMRC, and there are different sets of conditions (HMRC refers to these as different 'cases') depending on your circumstances.

Because of this, correcting a residence answer on your return - such as the 'only one home' question - is often the first step, not the final answer. Whether you actually qualify for split-year treatment still needs to be worked through against the relevant conditions for your situation. This can have a material effect on the figures in your return, so it's worth getting your residence position confirmed before you submit, ideally with the help of a qualified tax expert who can check the detail against your circumstances.

Common question: I've corrected my 'only one home' answer on my return - does that automatically mean I qualify for split-year treatment?

Not on its own, no. Correcting that answer fixes one part of the residence test, but split-year treatment is a separate question that depends on whether you meet the specific conditions for one of HMRC's split-year 'cases' - and which case, if any, applies depends on your personal circumstances. It isn't confirmed simply because you left the UK during the tax year. If you think split-year treatment might apply to you, it's best to have a qualified tax expert check your position against the conditions before you submit your return, since it can affect your figures.