Your first UK tax year: what the year of arrival actually taxes

A rule that divides a tax year of arrival or departure into two parts. Britain taxes only the UK part on the basis that applies to a resident. HMRC's residence guidance sets out the cases.

Yes, and this surprises people who expect the split to decide residence. It only applies to somebody who counts as UK resident for the tax year under the statutory residence test. It changes how Britain taxes that residence rather than whether the residence exists.

So the residence test comes first, every time.

Our guide to the statutory residence test sets out how it works.

Only once the test makes you resident for the year does the question of splitting it arise.

Several, and they turn on different facts. The arriving cases cover somebody starting to have a home here, somebody starting full-time work here, and the partner of either. HMRC's manual works through each one.

Each case has its own conditions and its own start date for the UK part.

More than one can apply, in which case the rules decide which takes priority.

So the task is to identify the case rather than to argue the general position.

In practice two facts settle most arrivals: where you first had a home here, and when a British job started. Everything else tends to follow from those.

On a date the relevant case fixes, which is not always the day you landed. One case starts the UK part when you first have a home in Britain, another when full-time work here begins, and the dates can differ by weeks.

Getting that date right is the whole exercise.

It drives which income falls in which part.

So establish the case and its trigger before splitting any figures.

Write the date down with the reason beside it. Three years later, nobody remembers whether the tenancy started before the job or after, and the return already assumed one of them.

UK source income, broadly. The split takes foreign income out of charge for the overseas part, and it does not exempt income arising in the United Kingdom during those months.

Rent from a British property is the usual example.

Employment duties performed here before the UK part begins can also be caught.

So the overseas part is not a period of no UK tax at all.

So check what British income you already had before arriving. People who let out a UK flat while living abroad usually have more of it than they expect.

Considerably, because it keeps pre-arrival American income out of the British calculation. Someone who sold shares in June and moved in October avoids a British charge on that gain where the split applies and the case fits.

Without the split, the whole tax year would be within scope.

In our practice this is the single largest number in a first-year British return.

So it is worth establishing before anybody files anything.

It also tidies the American side, because a gain that stays outside the British charge needs no credit claim and no matching exercise across two tax years.

It applies automatically where the conditions are met, rather than by election. What you do have to do is report on the correct basis, which means identifying the case and applying it in the return.

The residence pages of the Self Assessment return are where that happens.

Getting that right is what makes the rest of the return sensible.

So the treatment is automatic and the paperwork is not.

Software handles this badly. Several packages ask one yes or no question about the split and fill the pages from the answer. That works where the case is obvious, and not otherwise.

Dates, and the evidence behind them. A tenancy agreement, an employment contract with its start date, flight records, and the date you gave up a home abroad all support the case.

A case that turns on having a home needs evidence about homes.

A case that turns on work needs evidence about work.

So keep the documents that prove the trigger rather than the ones that prove you moved.

Six documents usually cover it. The tenancy, the contract, two flight confirmations, the notice ending a foreign lease, and a utility bill from your first month here.

Only in its own way, on its own tests. An American citizen's year never splits, because citizenship taxation applies throughout. A green card holder or a British national becoming American resident can have a dual-status year instead.

The two splits rarely fall on the same date.

Our guide to the dual-status tax return covers the American version.

So expect two different treatments of one move.

So a Briton moving here from America and an American doing the same thing produce completely different first-year files. The dates and the income can match exactly.

Carefully, because the two tax years do not align and the split dates do not either. Income taxed in both countries can still attract relief, and matching it up takes more work than in a settled year.

The sterling and dollar figures come from different periods.

Our guide to the foreign tax credit carryover covers surplus credits.

So the first year usually needs both returns prepared together rather than separately.

Our double tax treaty relief service handles the claim where income genuinely falls into both systems in the year of the move.

That is a separate question with its own rules, and the landscape has changed. A different regime now applies to new arrivals in place of the old remittance basis for non-domiciled individuals, and the conditions and timing differ.

Eligibility turns on recent years of non-residence.

Our guide to the new rules for arrivals touches on the wider position.

So treat the split year and the arrival regime as two questions rather than one.

Easily, and that is the risk worth naming. Assuming the year splits when no case applies leaves foreign income out of a return that should have included it, which is an error rather than a position.

HMRC can correct it years later.

Our guide to what happens in an HMRC enquiry sets out that process.

So establishing the case properly protects you as much as it saves you.

So document the case at the time. A file note written in year one is worth more than a reconstruction in year four.

A sequence for a first British tax year.

Most of this takes an afternoon. The part that takes longer is finding the documents, which is why it pays to collect them while the move is still recent.

Then Britain taxes the whole year as a resident year, and the planning moves elsewhere. That can happen where somebody arrives without taking a home or a job immediately, or where the facts fall between the cases.

The credit then carries more of the weight.

Timing a disposal before the tax year begins is the other lever, where that is possible.

So the answer may be to move the transaction rather than the date of the move.

In our practice the people caught by this arrived with no fixed address and no job offer, stayed with family for a few months, and only later took a tenancy.

Consider an American who sold a US holiday home in May, arrived in Manchester in September, and started a British job the following week.

The gain arose months before he arrived. Without a split, it would have fallen inside a British resident year and attracted UK tax with credit for the American tax paid.

With the split applying from the start of his UK part, the gain sat in the overseas part and outside the British charge altogether.

These facts are illustrative. The pattern is the ordinary one: the whole UK tax year of arrival turned on a date and a case.

The first assumes the year splits automatically on the date of arrival. The case fixes the date, not the removal van.

The second applies the split without residence for the year at all, which puts the analysis in the wrong order.

The third leaves UK source income out of the overseas part, where it generally belongs.

The fourth files the British return first and the American one later, which makes the credit harder than it needs to be.

In a UK tax year of arrival we work the residence test first and the case second, because that order is what the legislation requires and what HMRC expects to see.

Then we prepare both returns together for the year of arrival, since the credit position depends on figures that sit in different periods on each side.

Our UK Self Assessment service covers the British side, and fees stay fixed and agreed in writing. How we work sets out the process.

If you arrived part-way through a tax year, talk to us before the first return.