Does leaving the UK end my inheritance tax exposure?

Not immediately. A long-term resident, UK resident for 10 of the last 20 tax years, keeps a worldwide estate within UK inheritance tax for 3 to 10 years after leaving, depending on time spent here.

What is split-year treatment?

It divides your year of departure into a resident part and a non-resident part, so foreign income and gains arising after you leave can fall outside the UK charge where the rules are met. We confirm eligibility and file on that basis.

Can gains still be taxed after I leave?

Yes, in some cases, including UK property and gains realised if you return within a short period. We time disposals around your departure date to avoid an unnecessary charge.

Leaving the UK and Its Tax Tail

Written and reviewed by the Non-Dom Accountants editorial team. Last reviewed 28 July 2026.

Leaving the UK cleanly is a tax exercise, not just a change of address. The year you go is usually a split year, part resident and part not, and the way you break residence under the statutory residence test decides what the UK can still tax.

We handle the departure return, the treatment of foreign assets on the way out, and the part most people miss: the inheritance-tax tail. Since 6 April 2025 long-term residents keep a worldwide exposure for years after they go, which is a question of UK domicile replaced by residence. If you are only now arriving, arriving in the UK is where to start.

The Year You Depart

We establish whether your year of departure qualifies for split-year treatment, so foreign income and gains after you leave fall outside the UK charge where the rules allow. We work out the exact date residence ends under the residence test and prepare the return that reports it. Getting the date right matters, because the day-count ties and the automatic overseas position turn on it.

We also deal with UK assets you keep, such as property, which remain within UK tax after you go, and with capital gains that can be caught if you return within a short period.

Where Departure Gets Complicated

The awkward part is the tail. Under the residence-based inheritance tax rules from 6 April 2025, a long-term resident, meaning someone UK resident for 10 of the last 20 tax years, keeps a worldwide estate exposure for between 3 and 10 years after leaving, depending on how long they were here. Leaving does not switch that off on the day you land elsewhere.

Timing gains around the departure date, and around any later return, is the other trap. A disposal in the wrong tax year can sit inside the UK charge that a few weeks would have avoided.

How We Manage Your Exit

We review your residence history, fix the departure date, prepare the split-year return, and map how long the inheritance-tax tail runs in your case.

We advise on the tax position and file the returns. We do not recommend trusts, offshore bonds or insurance products, and we do not sell any structure to shorten the tail.

What Departure Work Costs

We agree a fixed fee before we start, set against the departure return and the estate review you need. The figure is fixed at the outset and does not move with the size of your foreign holdings.