How does split-year treatment work when moving to Dubai?

The UK tax year runs 6 April to 5 April, and HMRC’s default is binary: for a given year you’re either UK-resident or you’re not. Leave in October and, by default, you could be treated as UK-resident for the whole year, including the months you were already living in Dubai. Split-year treatment is the relief that fixes that. But it doesn’t apply itself.

What split-year treatment actually does

It splits your departure year into two parts:

• A UK part, up to the date you leave, taxed as UK-resident.
• An overseas part, after you leave, taxed as non-resident.

The effect is that your UAE income earned after you go isn’t dragged into UK tax simply because you happened to leave mid-year.

The catch: it isn’t automatic

This is the bit people miss. Split-year treatment only applies if you meet one of HMRC’s defined cases. The ones most relevant to a Dubai move include:

Each case has its own conditions on days, timing and what counts as “full-time” or “a home”. The detail is fiddly, and meeting the spirit of a case isn’t enough, you have to meet its specific tests.

Why the departure year is the one that matters

Your departure year is where most of the planning value lives. Get it right and your UAE earnings fall cleanly outside UK tax from the day you leave. Get it wrong, wrong timing, a UK home left available, too many return days, and you can lose a year of the benefit you moved for.

A few things that quietly undermine a split-year claim:

• Leaving too late in the tax year to satisfy the case cleanly.
• Keeping a UK home available and spending time in it.
• Misjudging what counts as full-time work overseas.
• Forgetting that some UK-source income (rent, certain pensions) stays taxable regardless.

Return days are the part you control. RezTally, our own day-log app, counts them for the tax year you leave in.

Split-year treatment is one of those reliefs that is simple to describe and easy to fumble. It works alongside the Statutory Residence Test rather than instead of it, and the departure year is precisely the point where it’s worth getting proper advice rather than a guide.

Capital gains tax in your departure year

Split-year treatment covers income tax. Capital gains tax (CGT) has its own set of rules for the departure year, and they interact with split-year in ways that regularly catch people off guard.

Gains made during the UK part of your split year are subject to UK CGT on all assets, including those held overseas, just as they would be for any UK-resident disposal.

Gains made during the overseas part are generally outside UK CGT for non-UK assets. This is one reason the timing of disposals (shares, crypto, business interests) around your departure date can make a material difference.

Two important limits:

• UK residential property stays within the UK CGT net regardless of your residency. If you sell a UK property after leaving, NRCGT (Non-Resident CGT) still applies and the disposal must be reported to HMRC within 60 days of completion.
• Temporary non-residence rules: if you return to the UK within five years of leaving, HMRC can treat gains made during your absence on assets you owned before you left as taxable in the year you come back. This catches people who treat a short stint abroad as a clean break when it legally isn’t.

The sequencing of asset sales around your departure date is worth thinking through before you leave, not after.

Split-year and the UK-UAE double tax treaty

The UK-UAE double tax agreement is relevant once you’re established as a UAE tax resident, but during the departure year itself, the split-year rules under the SRT come first. They determine which portions of your income fall under UK jurisdiction at all. The treaty doesn’t override or replace split-year treatment; the two operate in sequence. Broadly: split-year defines the boundary, the treaty handles what happens on either side of it for certain income types.

Want to see whether a split applies to you? The free split-year calculator runs the three leaver cases against your plans and shows your reduced day budget for the rest of the departure year.

If you want the departure year planned with a UK-registered tax adviser before you go, that is our UK and UAE tax planning service.

Already left and unsure your departure year was handled right? The Clean Break Review reviews your UK tax position, split-year included, with a UK-registered tax adviser.