With a large ETF portfolio, you should not choose Ireland blind.

The most expensive thing in your luggage

Ireland does not treat funds like other investments. Units in investment funds, many ETFs and life policies with an investment element fall under a regime of their own, with its own rate, its own timing and its own rules on losses. If you bring a portfolio made up of fund units, you bring along the least pleasant side of Irish tax law.

This is where we most often put the brakes on for families. The remittance basis is strong, but it is no shield against this regime once income flows into Ireland or the units are Irish anyway. And the deemed disposal we come to in a moment works whether or not you ever sell anything.

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The deemed disposal every eight years

The real difference from what most European investors know is not the rate but the timing. Ireland deems the fund unit sold every 8 years, works out the growth since the last such date and taxes it. Whether you sold makes no difference. Whether you received any money, none either.

For a family that holds a portfolio as retirement savings and has no wish to sell, this is a real disadvantage. Every eight years a tax bill arises on a gain that nobody has realised, and the money for it has to come from somewhere. The very sale you wanted to avoid becomes more likely.

The Finance Act 2025 cut the rate and left the deemed disposal untouched. It continues unchanged.

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Three things, one name

Around funds the term exit tax comes up again and again, and it causes more confusion than any other term in Irish tax law. It names three different mechanisms that have nothing to do with one another.

For your portfolio only the third row applies. The first row concerns an individual leaving Ireland and is the good news of this table. The second concerns companies that move their residence or assets out of Ireland. If you want to talk about the exit taxation of the country you are leaving, that sits somewhere else entirely: the UK itself charges individuals no exit tax, but its rule on temporary non-residence brings certain gains back into UK tax if you return within five years, as set out on the page on leaving the UK.

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Tax deducted back home

A short note that belongs here because it concerns the same portfolio. Some countries deduct tax at source from the dividends of their companies, sometimes more than their treaty with Ireland finally leaves them. The UK is the pleasant exception: no tax is deducted on payment of an ordinary dividend from a UK company, so there is nothing to reclaim on those British shares. Only the property income distributions of UK REITs are paid with basic rate tax deducted.

For shares from other countries the point stands. Where a source country withholds more than its treaty with Ireland allows, the difference comes back only on a claim, and that claim rests on the treaty. Where the treaty has a remittance clause, it limits treaty relief to the part brought into Ireland. If you leave the dividend outside, you lose the refund and the full deduction at source becomes final. If you bring it in, you get the refund and pull the income into Irish tax.

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