Irish taxes for Americans: residence, domicile and your US return

Ireland taxes you because you live there; Uncle Sam taxes you because you're a US citizen. The good news is that Irish tax rates are high enough that, for many salaried Americans, the foreign tax credit wipes out the US bill.

The short version

• Irish residence is mostly a day count: 183 days in a tax year, or 280 days across this year and last, with a 30-day floor [1].
• Domicile matters. If you're resident but not Irish-domiciled, foreign income is generally taxed in Ireland only when you bring it into the country, under the remittance basis [2].
• Irish rates are steep: 20% on the first €44,000 (about $49,100) for a single person in 2026, 40% above that, plus USC and PRSI [3]. See Irish income tax, USC and PRSI explained.
• You still file a US return. The 1997 US–Ireland income tax treaty doesn't excuse citizens, so the foreign tax credit (Form 1116) or the foreign earned income exclusion (Form 2555) does the work [4][5][6].
• A totalization agreement exists, so you usually pay into one social security system, not both [7].

USD conversions use the Federal Reserve H.10 rate of October 30, 2026 (EUR 1 = USD 1.1163), rounded. This is general information, and a US expat tax preparer can check your situation.

When Ireland counts you as resident

Ireland's tax year is the calendar year, the same as the IRS's. Revenue, the Irish tax authority, uses three related ideas: residence, ordinary residence and domicile, and you can have any combination of them.

Residence

You're resident for a tax year if you're in Ireland [1]:

• for 183 days or more in that year, or
• for 280 days or more across that year and the year before combined.

You're never resident under the 280-day test if you spend 30 days or less in Ireland in the year. Any part of a day counts as a day [1].

If you move mid-year, you can elect to be resident in your arrival year, as long as you'll be resident the next year; you tell Revenue in writing, and you're then taxed on worldwide income [1].

Ordinary residence

After three consecutive years of residence, you become ordinarily resident from the start of the fourth year. If you leave, it follows you for three more tax years [8]. That matters if you move back to the States and still have Irish income.

Domicile: the one Americans should read twice

Domicile broadly means the country you intend to live in permanently. You're born with a domicile of origin, usually your father's, and you keep it unless clear evidence shows you've made a permanent home elsewhere with no intention of going back [2]. Most Americans who move to Dublin for a job keep their US domicile, at least at first.

The remittance basis for non-domiciled residents

Here's the feature that makes Ireland interesting for Americans. If you're Irish tax resident but not domiciled in Ireland (Revenue's page describes someone who is also not yet ordinarily resident, as most newcomers aren't), Revenue taxes [2]:

• your Irish-source income in full, including salary for work done in Ireland, and
• your foreign income only to the extent you remit it, meaning bring it into Ireland by wire, mail or online transfer.

So US rental income, dividends or interest that you leave in a US account generally aren't taxed in Ireland. Wire them to your Irish bank, and they can be. The fine print here is real (what counts as a remittance, mixed accounts, capital gains), so get advice before you move money.

Note what the remittance basis doesn't do: the IRS taxes your worldwide income regardless. Unremitted US income with no Irish tax on it simply stays fully taxable in the US.

Separately, Ireland has a domicile levy of €200,000 (about $223,000) a year, but it applies only to very wealthy Irish-domiciled individuals, not to a typical American newcomer [2].

How Ireland taxes your paycheck

If you work for an Irish employer, tax comes out through PAYE, like US withholding. In 2026, a single person pays [3]:

The 2025 band was the same €44,000 [3]. On top of income tax come the Universal Social Charge (USC) and PRSI, Ireland's social insurance; our guide to Irish income tax, USC and PRSI walks through the math. Compared with most US states, the combined bite on a professional salary is noticeably higher.

Your US return: treaty, FEIE or foreign tax credit

The treaty

The US and Ireland have an income tax treaty dating from 1997, amended by a 1999 convention [4]. Like other US tax treaties, it has a "saving clause" that generally lets the US tax its own citizens as if the treaty weren't there, so the treaty rarely gets you out of filing. It still matters for residents of either country, and the foreign tax credit handles most of the overlap for citizens. The US and Ireland also have an estate tax treaty, but no gift tax treaty [9].

FEIE vs foreign tax credit

You have two main tools [5][6]:

Because Irish tax is usually higher than US tax on the same salary, the foreign tax credit often wipes out the US tax on wages. The exclusion can make sense for some, but you can't take a credit for tax on income you've excluded [6]. Which one wins depends on your income mix, your family situation and plans to move back. Our guide to the FEIE vs the foreign tax credit goes deeper.

Reporting that follows you

• FBAR: file FinCEN Form 114 if your foreign accounts total more than $10,000 at any time in the year [10].
• Form 8938: living abroad, you file if foreign assets exceed $200,000 at year-end or $300,000 at any time (single), or $400,000 / $600,000 (married filing jointly) [10].
• Irish funds can be PFICs for US purposes, with painful reporting and tax. Think twice before buying an Irish-domiciled ETF or investment fund.

Social security: the totalization agreement

The US and Ireland have a totalization agreement [7]. In general, you pay into the system of the country where you work, so you don't pay both FICA and Irish PRSI. If a US employer sends you to Ireland temporarily, you may stay in the US system with a certificate of coverage; self-employed people who live in Ireland are generally covered by Ireland [7]. The agreement can also combine work credits: you need at least six US credits to use Irish coverage toward a partial US benefit, and Irish benefits need at least 52 weeks of Irish coverage [7]. See tax treaties and totalization agreements for how this plays out.

Questions about your own setup are a good fit for our community group for Americans in Ireland, where people swap notes on preparers and Revenue paperwork.

Sources

1. Revenue: How to know if you are resident for tax purposes
2. Revenue: What is domicile and the domicile levy?
3. Revenue: Tax rates, bands and reliefs
4. IRS: Ireland tax treaty documents
5. IRS: Figuring the foreign earned income exclusion
6. IRS: Foreign tax credit
7. SSA: US–Ireland Social Security agreement
8. Revenue: How to know if you are ordinarily resident for tax purposes
9. IRS: Estate and gift tax treaties (international)
10. IRS: Comparison of Form 8938 and FBAR requirements

Keep reading

• Irish income tax, USC and PRSI explained
• Irish pensions and PRSAs: US tax issues
• The FEIE vs the foreign tax credit
• PFICs: why foreign funds hurt Americans