Temporary Non-Residents and Capital Gains Tax

Introduction

If you leave the UK but return within five years, special anti-avoidance rules mean you may still have to pay Capital Gains Tax on assets you sold whilst living abroad. These "temporary non-resident" rules are designed to prevent people from avoiding UK tax by briefly moving overseas to dispose of assets. Understanding whether these rules apply to you is essential if you're planning to leave the UK or have recently returned.

Who counts as a temporary non-resident?

You're caught by the temporary non-resident rules if you meet all of the following conditions:

• You were UK resident for at least four out of the seven tax years immediately before the year you left the UK
• You stopped being UK resident for a period of fewer than five years
• You return to the UK and become UK resident again

The five-year period is measured in complete tax years. If you're non-resident for five complete tax years or more, these rules don't apply to you.

What gains are affected?

When you return to the UK and become resident again, you'll be taxed on certain capital gains that arose during your period of non-residence. The rules apply to gains on assets you owned before you left the UK, or that were given to you by your spouse or civil partner whilst you were abroad.

The key point is that the asset must have been yours before you became non-resident, or must have come from your spouse or civil partner during the non-resident period. If you buy a completely new asset whilst non-resident and sell it whilst still non-resident, those gains usually fall outside these rules.

When the tax becomes due

The tax charge arises in the tax year you return to the UK and become resident again. You'll need to report these gains on your Self Assessment tax return for that year, even though the actual disposal happened in an earlier year when you were non-resident.

You'll use the Capital Gains Tax rates and annual exempt amount (the tax-free allowance) that apply in the year of return, not the rates that applied when you actually made the disposal.

For the 2025/26 tax year, the annual exempt amount is £3,000. This means the first £3,000 of your total gains (including any temporary non-resident gains) is tax-free.

Gains on assets acquired after departure

Assets you acquire for the first time after you've left the UK and become non-resident are treated differently. If you buy something whilst non-resident and dispose of it whilst still non-resident, the gain will not normally be caught when you return.

However, there's an important exception: if your spouse or civil partner transfers an asset to you whilst you're both non-resident, and that asset was owned by them before they left the UK, the temporary non-resident rules can still apply to gains on that asset.

Split year treatment

In some circumstances, the tax year during which you leave or return to the UK can be split into a UK part and an overseas part. This is known as split year treatment and was previously covered by Extra-Statutory Concession D2.

If split year treatment applies to you, it affects when you're considered to have become non-resident or resident again for the purposes of the temporary non-resident rules. This can be particularly important in working out whether your period abroad was fewer than five years, and in determining which gains are caught.

Split year treatment doesn't apply automatically—it depends on your specific circumstances and the reasons for leaving or returning to the UK.

Non-resident companies and settlements

The temporary non-resident rules can also affect you if you have gains from:

• Companies that are non-resident but that you have a significant stake in
• Offshore trusts and settlements

If you're involved with non-resident companies or settlements that make capital gains during your period abroad, you may still be taxable on those gains when you return to the UK. This is a complex area that extends beyond simple personal asset disposals.

Double taxation relief

If you pay tax on the same gain in another country during your period of non-residence, and then face a UK tax charge when you return, you may be entitled to double taxation relief. This prevents you from being taxed twice on the same gain.

The relief works by allowing you to credit the foreign tax you've paid against your UK tax bill on the same gain. The amount of relief depends on the specific double taxation treaty between the UK and the other country, if one exists.

How to report temporary non-resident gains

When you return to the UK and become resident again, you must include your temporary non-resident gains on your Self Assessment tax return for that tax year. You'll need to:

• Identify which disposals you made whilst non-resident are caught by the rules
• Calculate the gains using UK Capital Gains Tax rules
• Report them alongside any other gains you make in the year of return
• Apply the annual exempt amount and pay any tax due

The deadline for your tax return is 31 January following the end of the tax year. Any tax due is also payable by this date.

Planning considerations

If you're considering a move abroad and plan to dispose of assets, the temporary non-resident rules are a crucial factor in your planning. The key threshold is five complete tax years of non-residence. Returning even slightly earlier can trigger a significant tax charge.

It's also important to consider the timing of asset disposals. Disposing of assets before you leave the UK, or waiting until after you've been non-resident for five complete tax years, may result in a better tax outcome depending on your circumstances.

Sources

• Temporary non-residents and Capital Gains Tax (Self Assessment helpsheet HS278)

This article provides general guidance based on current HMRC rules. For advice specific to your situation, speak to your accountant.