Capital Gains Tax Planning for UK Expats: Timing Disposals Around Non-Residence

For internationally mobile individuals, few tax decisions carry higher stakes than the timing of a significant asset disposal. Whether you are selling a business, a portfolio of shares, investment property, or other capital assets, the difference between disposing of those assets as a UK resident or as a non-resident can run to hundreds of thousands of pounds — or more. Yet the rules are more nuanced than many people assume, and the penalties for getting them wrong are severe.

This guide explains how UK capital gains tax (CGT) applies to expats, how the statutory residence test determines your exposure, what the temporary non-residence anti-avoidance provisions mean in practice, and how to plan disposals lawfully and effectively as of 2026.

How UK CGT Works for Non-Residents

UK CGT taxes gains made by UK-resident individuals on the disposal of chargeable assets. For most asset classes — shares, funds, bonds, business assets — a non-UK resident individual is outside the scope of UK CGT entirely. This is the fundamental planning opportunity: if you are genuinely non-resident, gains on non-UK-situs assets and most UK assets (excluding UK property and land) are not subject to UK CGT.

The key exception, introduced in April 2015 and extended in April 2019, is UK land and property. Non-resident CGT (NRCGT) now applies to all direct and indirect disposals of UK residential and commercial property, regardless of residence status. That is covered in a separate guide. For this guide the focus is on non-property assets — shares, business interests, and investment portfolios.

Determining Your Residence Status: The Statutory Residence Test

Since April 2013, whether you are UK-resident for tax purposes is determined by the Statutory Residence Test (SRT). The SRT is a three-part test:

The automatic overseas tests — if you meet any of these, you are non-resident. Examples: you were not UK-resident in any of the previous three tax years and spend fewer than 46 days in the UK in the current year; or you work full-time overseas (averaging at least 35 hours per week) and spend fewer than 91 days in the UK.

The automatic UK tests — if you meet any of these, you are UK-resident. Examples: spending 183 or more days in the UK; having a UK home available to you for 91 or more days in the year whilst having no overseas home.

The sufficient ties test — if neither automatic test applies, your residence depends on the number of UK ties you have (family tie, accommodation tie, work tie, 90-day tie, country tie) combined with your day count.

Accurate day counting is essential. A day of UK presence is any day on which you are in the UK at midnight. Certain transit days may be excluded where specific conditions are met. HMRC audits expats' day counts and travel records rigorously, so contemporaneous records — diary, passport stamps, boarding passes — are indispensable.

Split-Year Treatment

In the year you leave or return to the UK, split-year treatment may apply, dividing the tax year into a UK part and an overseas part. Gains on disposals made in the overseas part of a split year are treated as arising when you were non-resident, taking them outside the scope of UK CGT (subject to the temporary non-residence rules below).

There are eight cases under which split-year treatment applies; the most common for departing expats is Case 1 (leaving to work full-time overseas) and Case 4 (leaving as a partner of a full-time overseas worker). Identifying the correct split date is critical — it determines whether a particular disposal falls inside or outside the UK part of the year.

The Temporary Non-Residence Rules: The Critical Anti-Avoidance Trap

This is where many expats make costly errors. The temporary non-residence (TNR) provisions — contained in TCGA 1992, s.10A — bring certain gains back into the UK CGT net even if made during a period of non-residence, if the individual returns to the UK within five complete tax years of departure.

Under the TNR rules, if you:

• Were UK-resident for at least four of the seven tax years before departure, and
• Return to the UK as a resident within five complete tax years of your year of departure,

then certain gains accrued (or "realised") during the non-resident period are taxed in the year of return as if they had arisen in that year.

The TNR rules apply to gains on assets you owned before you left the UK. Gains on assets acquired after departure (and disposed of before return) are generally not caught.

This means that to dispose of pre-departure assets free of UK CGT, you must remain non-resident for at least five complete tax years. "Complete tax years" means full UK tax years (6 April to 5 April) between the year of departure and the year of return. If you leave during 2026/27 and return during 2031/32, you have been non-resident for only four complete intervening tax years and the TNR rules will apply.

Practical Planning: Timing the Disposal

Given the above, effective CGT planning for expats requires co-ordinating:

1. Departure date and the split year. The earlier in the tax year you depart (and the cleaner the SRT analysis), the earlier your overseas part begins and the more tax year remains for disposals outside the UK.

2. Asset ownership before and after departure. The TNR rules only catch assets owned at the point of departure. Assets acquired after becoming non-resident can generally be disposed of free of UK CGT without the five-year constraint (though check for substance requirements and overseas tax obligations).

3. The five-year clock. If you intend to return to the UK, plan disposals of significant pre-departure assets within the first five complete tax years of non-residence, before the TNR clock expires. Conversely, if the return date is uncertain, consider whether it is worth deferring until you can be confident of remaining non-resident for the full five-year period.

4. Bed-and-breakfast within split year. Where assets stand at a gain at the date of departure, it may be possible to sell and repurchase within the overseas part of the split year, crystallising the gain as a non-resident. The 30-day share matching rules must be observed — if the same shares are repurchased within 30 days of disposal, the gain is matched against the new acquisition, defeating the purpose. Using a spouse, civil partner, or a wrapped investment structure may allow the economic exposure to be maintained.

5. Year of departure allowances. In the UK part of the split year you retain the annual exempt amount (AEA) pro-rated to the UK period. As of 2026, the AEA is £3,000, having been reduced significantly from £12,300 in 2022/23. Gains within the AEA in the UK part are free of CGT.

6. Losses. Non-residents cannot usually offset UK CGT losses against gains on non-property assets (since they are not within the scope of UK CGT), but losses on UK property held by non-residents can be used against NRCGT gains. On return, losses arising during the non-resident period may be available against gains in the year of return under the TNR rules.

Overseas Tax Considerations

Exiting UK CGT does not mean exiting all tax. Most jurisdictions tax gains arising while you are resident there. If you move to France, Germany, the UAE, or Singapore, your gains may be taxable under local rules — and the rates and bases vary considerably. UAE and Bahrain levy no personal income or capital gains tax as of 2026, making them popular destinations for pre-disposal planning. However, anti-abuse provisions in the relevant double tax treaties and the substance requirements of the jurisdiction must be respected; artificial or contrived arrangements will be scrutinised.

Furthermore, if you hold US assets or are a US person, FBAR, FATCA, and US capital gains rules create an additional compliance layer entirely separate from UK CGT.

Record-Keeping and HMRC Compliance

HMRC expects returning expats to be able to demonstrate:

• Actual day counts in the UK and overseas for each tax year of non-residence
• The basis on which the split year applies and the split date
• Dates and proceeds of all disposals made during non-residence
• Acquisition costs (including indexation allowance history for pre-1998 assets)

Self-assessment returns must be filed for the year of departure and any year in which UK-situs disposals (including NRCGT) arise. Penalties for late or inaccurate returns can be substantial, particularly where HMRC suspects deliberate avoidance.

Common Errors to Avoid

• Returning too soon. The most expensive mistake is returning to UK residence before five complete tax years have elapsed, triggering the TNR provisions on gains already realised.
• Ignoring split-year cases. Not identifying the correct case for split-year treatment can mean disposing of assets in the wrong part of the split year.
• Assuming all assets are outside UK CGT. UK land and property is always within NRCGT scope, regardless of non-residence.
• Failing to consider double tax treaties. Some treaties contain provisions that limit the host country's right to tax and preserve the UK's taxing right; this is relatively rare for CGT but must be checked.
• Buying replacement assets within 30 days. The share-matching rules catch this and negate the disposal.

How Global Investments Can Help

Global Investments works with internationally mobile clients who hold complex portfolios — shares, business interests, investment funds, and overseas property — and need to structure disposals around genuine life events such as relocation, business sale, or return to the UK. Our advisers understand both UK CGT rules and the local tax environments in the international markets we work in, and can coordinate with specialist tax counsel to model the optimal disposal timing for your specific assets and circumstances. We help clients establish the correct residence position under the SRT, identify the appropriate split-year case, and design practical disposal strategies that respect the TNR rules. Tax rules change, and this guide reflects the position as of 2026; we recommend taking personalised advice before acting. Capital at risk.