An Irish tax resident selling a property abroad, a US holiday home, an apartment in Spain, a house left over from years working overseas, owes Irish CGT at 33% on the gain, in addition to whatever tax the country where the property sits charges. What actually determines how painful that overlap is comes down to one question most sellers never think to ask: does Ireland have a tax treaty with that country that specifically covers capital gains.
Get that answer right and the foreign tax paid is credited directly against the Irish bill, euro for euro up to the Irish liability. Get it wrong, or more accurately not know the answer at all, and the same foreign tax only reduces the taxable gain rather than the tax itself, which can mean paying meaningfully more in combined tax on the exact same sale.
Why Selling a Foreign Home Doesn’t Escape Irish CGT
Irish tax residency, not the location of the property, is what triggers the liability. An individual who is Irish resident or ordinarily resident is generally taxed on worldwide gains, which includes a home, apartment, or land held anywhere outside the State. The property never being physically in Ireland doesn’t move it outside Revenue’s reach once residency applies.
This catches two groups most often: someone who bought a foreign property years ago while living or working abroad and has since become Irish resident again, and an existing Irish resident who bought an overseas property as an investment or holiday home. Both face the same starting position under capital gains tax rules, regardless of how the purchase happened.
The Difference Between a Credit and a Deduction
Where Ireland has a double taxation agreement with the country in question that specifically covers capital gains, the foreign tax already paid is available as a credit against the Irish CGT bill, up to the amount of Irish CGT actually owed. Where no such agreement exists, or it doesn’t extend to capital gains, the foreign tax paid can only be deducted when calculating the taxable gain itself, a considerably weaker form of relief. Working out which side of that line a specific country falls on is exactly the kind of check our tax services cover before a foreign disposal is finalised, not after.
| Treaty covers CGT (credit) | No treaty coverage (deduction) | |
| Gain on sale | €80,000 | €80,000 |
| Foreign tax already paid | €12,000 | €12,000 |
| Personal exemption | €1,270 | €1,270 |
| Irish CGT before relief | €25,981 | €22,021 |
| Relief applied | €12,000 credit | Already reflected above |
| Irish CGT actually payable | €13,981 | €22,021 |
| Total tax paid (foreign + Irish) | €25,981 | €34,021 |
The gap between the two outcomes on identical figures, roughly €8,000 in this example, is the entire reason the treaty question matters more than almost anything else in this calculation.
What This Looks Like for a US Property Specifically
The Ireland-US tax treaty generally provides for credit relief on capital gains, so a US property sale usually falls into the more favourable side of the comparison above, provided the credit is actually claimed correctly on the Irish return rather than assumed to apply automatically. The credit can never exceed the Irish CGT actually due, so paying more foreign tax than the Irish liability doesn’t generate a refund or a carry-forward. A broader look at how cross-border structuring decisions get made for clients with US or international assets is covered on geroconnor.info, since the same treaty logic applies well beyond property alone.
The Personal Exemption Still Applies
The standard annual CGT exemption of €1,270 applies to a foreign property disposal exactly as it would to an Irish one, deducted before the 33% rate is calculated. It isn’t transferable between spouses, so jointly owned foreign property held by a married couple can claim two separate exemptions rather than one combined figure, provided the disposal and ownership structure support it. The gain still needs to be declared through the normal income tax return process alongside any other income for the year, not through a separate filing specific to foreign assets.
If You’re Not Irish-Domiciled
Someone who is Irish resident but not Irish-domiciled, common among people who moved to Ireland from elsewhere, may be able to use the remittance basis of taxation for foreign gains. Under this treatment, CGT on a foreign property disposal only becomes due on whatever proceeds are actually brought into Ireland, not on the full gain as it arises. Money that stays in an overseas account, never remitted, can sit outside the scope of Irish tax indefinitely under this basis. Getting expat tax advice before the sale happens, rather than after, is what makes the difference between using this relief properly and losing access to it through an early transfer of funds.
Selling Your Former Home When You Move Back to Ireland
Someone returning to Irish tax residency who then sells a property abroad that was genuinely their main home for the period they lived there may qualify for Principal Private Residence Relief, exempting some or all of the gain from CGT entirely, the same relief that applies to an Irish home sale. The property has to have actually functioned as the main residence, not simply been owned, for this to hold up under review. Getting the tax returns filed correctly in the year residency resumes matters here, since this is also the year the disposal typically needs to be reported.
Non-Resident Sellers Face a Different Set of Rules Entirely
Everything above assumes Irish tax residency at the time of the foreign disposal. A non-resident selling Irish property, the reverse scenario, falls under a separate set of tax clearance for non-residents rules entirely, since Irish CGT then applies based on the location of the Irish asset rather than the seller’s residency. The two situations get confused often enough that it’s worth stating plainly: this article covers an Irish resident selling a foreign property, not a non-resident selling an Irish one.
Frequently Asked Questions
What happens if I paid more foreign tax than the Irish CGT due?
The credit is capped at the Irish CGT liability. Any foreign tax paid above that amount isn’t refunded, carried forward, or offset against other Irish tax.
Does it matter when I bought the foreign property?
The purchase date affects the base cost used to calculate the gain, and indexation relief for inflation applied to costs incurred before 2003, but the credit-versus-deduction treatment itself depends on the treaty position, not the purchase date.
Do I need to declare a foreign property sale if I made a loss?
A loss should still generally be reported, since it may be available to offset against other gains in the same year or carried forward against future gains.
Is the 33% rate the same for foreign property as Irish property?
Yes. Foreign property disposals are taxed at the same 33% CGT rate as Irish property, with the treaty-based credit or deduction being the main variable that changes the final outcome.
Can currency exchange rates affect the calculation?
Yes. Both the acquisition cost and sale proceeds generally need to be converted to euro using the exchange rate applicable at the time of each transaction, which can itself create or reduce part of the reported gain.
Getting the Treaty Position Right Before You Sell
Whether a specific country’s tax treaty with Ireland covers capital gains isn’t something to assume either way. Confirming it before completing a foreign property sale, not after paying tax abroad, is what determines whether that payment becomes a full credit or a partial deduction on the Irish side. A fuller picture of how online chartered accountants work with clients holding assets outside Ireland is covered on geroconnor.info as well.
