Moving overseas can materially change the UK tax position of business owners, investors and internationally mobile families. Genuine non-residence can affect foreign income, investment gains, a future business sale and, over time, the Inheritance Tax treatment of overseas assets. But simply moving abroad does not switch off UK tax.
When are you actually non-UK resident?
Residence is determined under the Statutory Residence Test, which applies automatic overseas tests, automatic UK tests and, where necessary, a sufficient-ties test. Days spent in the UK matter, but so do work, homes, family and previous residence history.
The common idea that fewer than 183 UK days automatically means non-residence is wrong. A person can remain resident with far fewer days depending on their circumstances. Anyone leaving the UK should therefore plan and record UK visits and working days carefully.
The year of departure
Where the relevant conditions are met, split-year treatment can divide the departure year into a UK part and an overseas part. It is not optional and does not arise merely because somebody moves during the tax year.
Selling shares while non-resident
A non-UK resident will generally not pay UK Capital Gains Tax on many ordinary share disposals, subject to specific exceptions. A business owner who genuinely relocates may therefore find that a later disposal of a UK trading company falls outside UK CGT.
However, temporary non-residence rules are designed to prevent a short move abroad followed by a quick return. Broadly, someone with the required prior UK residence who is non-resident for no more than five years can have certain gains taxed when they return. Avoiding those rules requires a period exceeding five years, not simply five complete tax years.
Dividends can also be caught
Owner-managers should not assume they can become temporarily non-resident, take a large dividend and return shortly afterwards. For individuals returning from 6 April 2026 onwards, the temporary non-residence rules can apply to the full amount of certain qualifying distributions from closely controlled companies, including amounts relating to profits generated after departure.
UK property remains taxable
Non-residence does not remove UK property from the tax system. UK rental profits remain taxable and disposals of UK land can remain within CGT. Shares in a company deriving at least 75% of its value from UK land can also be caught where the individual holds the required substantial interest.
Inheritance Tax now follows residence history
Since April 2025, the UK has largely replaced domicile with a residence-based regime for overseas assets. An individual is generally a long-term UK resident after the relevant ten-year residence history is met. Once they leave, worldwide Inheritance Tax exposure can continue for a further three to ten tax years depending on their previous residence.
After ten consecutive tax years of non-UK residence, the previous UK residence history is effectively reset for these purposes. A later return would therefore not immediately restore long-term-resident status.
Returning to the UK
Someone returning after at least ten consecutive years of non-UK residence may be able to claim the four-year Foreign Income and Gains regime during their first four UK-resident years. It can exempt qualifying foreign income and gains, although the regime is claim-based and can affect personal allowances and other reliefs.
Do not forget the destination country
Becoming non-resident in the UK does not mean becoming tax-free. The destination country may tax worldwide income, gains, dividends or wealth, and tax treaties may influence which country has primary taxing rights.
The best non-residence planning happens before departure. Day counts, homes, work patterns, anticipated dividends, a possible business sale, UK property, Inheritance Tax exposure, the destination country’s rules and the intended length of the move should all be reviewed together.
