Investing

ISAs and British expats: what happens when you leave

Last updated September 2026 · 5 min read

You can keep an ISA you already have. You generally cannot pay into it while you are non-resident. And the country you move to probably does not recognise the wrapper at all, which means it may tax what is inside it regardless of the UK shelter.

The three rules

You cannot subscribe to an ISA for a tax year in which you are not UK resident.
Existing ISAs stay open and stay invested, keeping their UK tax-free status.
You can start contributing again for any tax year in which you are UK resident.

The shelter may be worthless where you live

An ISA is a UK construct. Most other countries do not recognise it, so your new country of residence may tax dividends, interest and gains inside the ISA under its own rules. People assume the wrapper travels with them. It generally does not.

Tell your provider

Do not keep contributing quietly. Contributions made while non-resident have to be unwound, and providers are obliged to act on residency information. Telling them at the time is far less painful than fixing it years later.

What expats use instead

International brokerage accounts built for cross-border clients.
Offshore investment accounts or bonds, which can suit some situations but need the charges examined carefully.
Regular savings plans, portable between countries, subject to eligibility where you live.
Local tax-advantaged accounts in your country of residence, if they exist and if you will stay long enough to benefit.

Watch the fund domicile. Non-US persons holding US-domiciled funds and ETFs can face US estate tax exposure above a low threshold. Irish-domiciled equivalents are widely used for exactly this reason. It is one of the most costly and least known traps in expat investing.

And when you come back

Your ISA is waiting, unchanged, and you can contribute again from the tax year you resume UK residence. For many expats the right answer is simply to leave it alone and invested rather than cashing it in before they go.

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General information only, not financial, tax or legal advice. Rules and rates change and your own position depends on your circumstances. Take qualified advice before acting.