UCITS is a set of rules for funds sold to the public — limits on concentration, borrowing and counterparty risk — that began in the EU and that the UK keeps its own version of. A fund's domicile is the country it's legally based in, which isn't always where it's listed: many ETFs traded in London are domiciled in Ireland or Luxembourg. To UK tax law, a fund based outside the UK is an offshore fund.
That's where it reaches your tax return. Gains on an offshore fund with reporting fund status from HMRC are taxed as capital gains, and the fund reports its income each year, which you may owe tax on even if it was reinvested rather than paid out. Gains on a non-reporting fund are generally taxed as income, usually at a higher rate. None of this arises inside an ISA or a pension. Domicile also affects how much foreign tax is withheld from dividends inside the fund, and US-domiciled ETFs have generally not been sold to UK retail investors because they lack the key information document UK rules have required — a regime that, as of 2026, is being replaced. The app doesn't show domicile or reporting status; HMRC publishes the list of reporting funds.
Outside an ISA or pension. Rates and rules change — check HMRC's guidance.
Educational content only. It is not personal financial advice.