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Irish Tax Residency: The Day Count, Domicile and Split-Year Treatment
Moving countries is complicated enough without also working out which government gets to tax which part of your money. Three tests decide your Irish position, and most expensive mistakes come from mixing them up.
- You're Irish tax resident for a year with 183 days here, or 280 across that year and the last, as long as this year has more than 30.
- After three resident years you're also ordinarily resident, which follows you for three years after you leave.
- Domicile, where your permanent home is, decides whether foreign investment income is taxed only when you bring it in.
Check your own days with our tax residence checker.
We take the three tests in order, then the reliefs that depend on them: split-year treatment, the remittance basis, the treaty tie-breaker, SARP and the Foreign Earnings Deduction.
Are you Irish tax resident? The two day-count tests
- You're resident for a tax year (January to December) with 183 days in Ireland, or 280 days across this year and the previous one.
- Residence has nothing to do with nationality or visa.
- A year with 30 days or fewer never counts, and its days don't count towards the 280.
The 183-day test. You're Irish tax resident for a year if you're present in Ireland for 183 days or more in that tax year. The tax year is the calendar year, January to December.
The 280-day test. If you don't hit 183, Revenue looks at the current year plus the previous one combined. 280 days or more across the two, and you're resident in the second year.
But that second test has a condition attached that most summaries leave out, and it changes the answer completely: the 280-day test does not apply in any year where you're present in Ireland for 30 days or fewer. Compare two cases:
| Year 1 | Year 2 | Combined | Resident in Year 2? |
|---|---|---|---|
| 240 days | 40 days | 280 | Yes |
| 250 days | 30 days | 280 | No |
Same total. Opposite outcome. If you've read anywhere that 280 days across two years makes you resident full stop, that's the missing half of the rule.
You arrive on 1 September 2025 and stay. That's 122 days in 2025, so you're not resident for 2025 on the day count. In 2026 you travel a lot and spend 170 days in Ireland.
| Days | Resident? | |
|---|---|---|
| 2025 | 122 | No: under 183, and 2024 had no days |
| 2026 | 170 | Yes: 170 + 122 = 292, over 280, and 2026 has more than 30 |
170 days alone wouldn't make you resident in 2026. The 122 days from 2025 do.
How days are counted. You're present for a day if you're in Ireland at any point in it, so the days you land and leave both count. Time airside in an airport in transit doesn't, and if something unforeseen, like severe weather or an aircraft breakdown, stops you leaving on the day you planned, the extra day doesn't count either. Revenue sets out the tests on its residence page and in its manual on the residence of individuals.
Arriving late in the year: you can elect to be resident
- If you arrive too late to reach 183 days but you'll be resident next year, you can elect to be resident for your arrival year.
- It usually gets you the full year's tax credits on your Irish salary.
- The election is made in writing and can't be withdrawn.
- Who it helps: someone who arrives in October or November and starts an Irish job. Without the election you're non-resident for the year, and as a non-resident you may not get the full €4,000 of single personal and PAYE credits for 2026.
- What it costs: being resident brings your worldwide income for the year into Irish tax. Split-year treatment then keeps your foreign salary from before you arrived outside it, so for most employees there's nothing to lose.
- How: write to Revenue through MyEnquiries in myAccount. Our tax residence checker tells you when the election is open to you.
Ordinary residence: the three-year tail
- After three consecutive tax years as a resident you become ordinarily resident from the fourth.
- You stay ordinarily resident until you've been non-resident for three years in a row.
- While it lasts, Irish capital gains tax still applies to your gains anywhere in the world, even after you've moved away.
So someone who lives in Ireland for four years and then moves to Singapore is not finished with the Irish tax system on the day they board the plane.
Ordinary residence is particularly significant for capital gains: an individual who is resident or ordinarily resident is within the charge to Irish CGT on disposals of assets wherever they're located (for non-domiciled people, foreign gains are taxed on the remittance basis described below). Selling a property back home two years after leaving Ireland is exactly the scenario people don't see coming.
You arrive in 2022 and are resident for 2022, 2023 and 2024. You're ordinarily resident from 2025. You leave in 2027 and are non-resident from 2028.
| Tax year | Resident | Ordinarily resident |
|---|---|---|
| 2022–2024 | Yes | No |
| 2025–2027 | Yes | Yes |
| 2028–2030 | No | Yes |
| 2031 | No | No |
Selling an apartment back home in 2029 is within Irish CGT, even though you haven't lived here for two years (if you're not Irish-domiciled, only to the extent you bring the proceeds into Ireland). From 2031 it isn't.
- What stays taxable while you're ordinarily resident but not resident: your worldwide gains, and your foreign investment income if it's over €3,810 in the year, in which case all of it is taxable. A job or business carried on entirely abroad isn't caught.
- Treaties often override this. If you're resident in your new country, its treaty with Ireland may give that country the right to tax the gain. Check the treaty before you sell, not after.
Split-year treatment when you arrive or leave
- In the year you arrive or leave, split-year treatment keeps salary you earn abroad outside Irish tax, with the full year's credits.
- It covers employment income only.
- If you arrived in 2025 or later, claim it on your income tax return; otherwise write to Revenue through MyEnquiries.
- Arrival year: you're resident in the year you arrive, weren't resident the year before, and will be resident the year after. Your salary for work done abroad before you arrived isn't taxed in Ireland.
- Departure year: you're resident in the year you leave and won't be resident the next year. Salary from a job abroad after you leave isn't taxed in Ireland. Rental, investment and directors' income get no split.
Here's what that's worth. Say you arrive on 1 May. January to April you worked abroad and earned the equivalent of €25,000. From May to December you earn €48,000 in Ireland. You're comfortably Irish tax resident for the year.
Without Split Year Treatment, as a resident you're taxable on worldwide income, so the €25,000 comes into the Irish computation (if you're not Irish-domiciled, foreign salary for work done abroad is generally only taxable here to the extent you bring it into Ireland — but Split Year Treatment doesn't depend on that):
| Calculation | Amount | |
|---|---|---|
| Total income | €25,000 + €48,000 | €73,000 |
| Tax at 20% | €44,000 × 20% | €8,800 |
| Tax at 40% | €29,000 × 40% | €11,600 |
| Less credits | €2,000 + €2,000 | −€4,000 |
| Irish tax | €16,400 |
With Split Year Treatment, the pre-arrival foreign employment income is ignored for Irish purposes, and you still receive the full year's credits:
| Calculation | Amount | |
|---|---|---|
| Irish-taxable income | €48,000 | |
| Tax at 20% | €44,000 × 20% | €8,800 |
| Tax at 40% | €4,000 × 40% | €1,600 |
| Less credits | −€4,000 | |
| Irish tax | €6,400 |
A €10,000 difference. You'd normally reduce the first figure by claiming a credit for the foreign tax already paid on that €25,000 — if the other country took €6,000, the extra Irish tax would fall from €10,000 to about €4,000. But you'd have to document and claim that credit, and the relief is capped at the Irish tax attributable to the foreign income. Split Year Treatment removes the problem rather than managing it.
Revenue explains the claim on its split-year treatment page. The departure side, and the refund most people leave behind, is in the leaving Ireland guide.
Domicile and the remittance basis
- Domicile is where your permanent home is, and most people who move to Ireland keep the domicile of the country they came from.
- If you're resident but not Irish-domiciled, foreign investment income and foreign gains are taxed in Ireland only when you bring them in.
- Your salary for work done in Ireland is taxed in full either way.
Residence and domicile are not the same thing. Domicile is a legal concept about where your permanent home is. You're born with a domicile of origin, and you keep it unless you clearly settle somewhere else for good. You can live in Ireland for years, be firmly Irish tax resident, and remain non-domiciled.
- What the remittance basis covers: foreign rent, interest, dividends and gains, and salary from a foreign employment for work done outside Ireland. It doesn't cover salary for work done here, which goes through PAYE.
- What counts as bringing money in: a transfer to an Irish account, but also money or value received in Ireland in other ways, and money sent to your spouse or partner. Revenue's manual on the remittance basis sets out the detail, and our remittance basis guide works through it with figures.
- Keep capital and income apart. Savings you had before becoming resident can come in tax-free; income and gains earned since can't. Mixing them in one account makes it hard to show which you brought in, so open a separate account for each before you arrive.
Revenue's page on domicile covers the definition. The domicile levy you may read about applies only to Irish-domiciled people with worldwide income over €1 million and Irish property worth over €5 million, so it isn't an expat issue.
Resident in two countries: the treaty tie-breaker
- You can be resident in Ireland and another country in the same year under each country's own rules, and their tax treaty decides which counts.
- The treaty works in a fixed order: permanent home, closer personal and economic ties, where you usually live, and finally nationality.
- The usual case: in the year you move, you can be resident in both countries for a few months. The treaty, plus split-year treatment on the Irish side, normally stops the same salary being taxed twice.
- Keeping a home in both countries: if you rent in Dublin and still own a flat in Milan that's available to you, the permanent-home test may not settle it, and the next test, your centre of vital interests, looks at family, work and assets.
- Evidence matters: to rely on the treaty you usually need a certificate of tax residence from one country to give to the other. Revenue issues Irish certificates on request.
SARP and the Foreign Earnings Deduction
- SARP takes 30% of income above €125,000 out of income tax for five years, for people assigned here by their employer.
- The Foreign Earnings Deduction gives Irish residents a deduction for work days in certain countries, up to €50,000 a year from 2026.
- SARP, who qualifies: you're sent to Ireland by your employer or a group company between 2012 and 2030, after at least six months working for it abroad, you weren't Irish resident in the previous five years, and your basic salary is at least €125,000. Revenue lists the conditions.
- SARP, the deadline that matters: your employer must certify you to Revenue within 90 days of your arrival. From 2026 a certification within 180 days can be accepted, but you then lose the relief for your first year. SARP reduces income tax only, not USC or PRSI. Our SARP guide has the full conditions and a worked example.
- Foreign Earnings Deduction: if you're Irish resident and work at least 30 qualifying days in a year in countries such as India, China, Brazil, the UAE, Singapore or Japan, part of your salary is deducted. It's capped at €35,000 for 2022 to 2025 and €50,000 for 2026 to 2030, per Revenue's manual and eligibility page.
- They don't stack with split-year treatment or the remittance basis: FED can't be claimed on income that's already covered by split-year treatment, SARP, the remittance basis or Transborder Workers' Relief.
Double taxation agreements
- Ireland's treaties decide which country taxes income you still earn from home, and the other country gives credit for the tax paid.
- Nothing happens automatically: you claim the credit on your Irish return, with proof of the foreign tax.
- The credit is capped at the Irish tax on that income.
Ireland has tax treaties with most major countries, designed to stop the same income being taxed twice. If you still earn income from home — rent, a pension, freelance work, dividends — the treaty usually decides which country has the primary taxing right, and the other gives credit for tax already paid.
The practical point: none of this happens automatically. You claim treaty relief or a foreign tax credit yourself, on your Irish return, and you need to be able to evidence the foreign tax actually paid. A foreign payslip showing a deduction is usually not enough on its own — you generally want the foreign tax authority's own documentation.
Note also that a foreign tax credit is capped at the Irish tax attributable to that income. If the other country taxed it more heavily than Ireland would, you don't get the excess back from Revenue.
US citizens: a special case
- US citizens and green card holders file a US return every year, wherever they live.
- Irish tax paid can usually be credited against US tax, or Irish salary excluded up to a limit.
- Foreign accounts above the threshold need a separate FBAR filing.
If you're a US citizen in Ireland — or a green card holder, who is taxed as a US resident while holding that status — none of the above changes your US filing obligation. The US taxes its citizens wherever they live, so you generally file a US federal return every year your income is above the filing threshold, however long you've been gone.
The Foreign Earned Income Exclusion can shelter a substantial amount of Irish employment income, and Irish tax paid can generally be credited against US tax via Form 1116. Which of the two works better in your case depends on your income level and the mix — they interact, and choosing wrongly is a real cost.
Two things that catch Americans out more often than the income tax itself:
- FBAR (FinCEN Form 114). If your foreign financial accounts exceed the reporting threshold at any point in the year, you file it — and that's aggregate across accounts, so an Irish current account plus a savings account plus an old account at home can trip it without any single one looking large. It's separate from your tax return, filed separately, and the penalties for missing it are disproportionate to the effort of filing.
- Mismatched deadlines. The Irish and US tax years both run on the calendar year, which is convenient. The filing deadlines, extensions and payment dates do not line up, and Irish tax paid after a US deadline complicates the credit.
This is the overlap where general guidance stops being useful. If you're a US person with Irish income — or worse, Irish income plus assets at home — our VIP Premium service exists for exactly this kind of multi-jurisdiction position.
What Revenue will ask you for
- The burden of proof is yours: keep evidence of your arrival and departure dates, and a day count if you travel.
- Keep your foreign employment contract for split-year treatment, and foreign tax certificates for any credit.
- If you're not Irish-domiciled, keep a record of what you bring into Ireland.
- Documented arrival and departure dates — flights, tenancy start, employment contract start.
- A day count, if you travel regularly. A calendar you maintain contemporaneously is worth far more than one reconstructed under pressure two years later.
- Your foreign employment contract or employer letter, if you're claiming Split Year Treatment.
- Foreign tax certificates from the other country's revenue authority, for any foreign tax credit.
- Records of remittances, if you're non-domiciled — what came in, when, and from which source.
What matters in your first year
- Confirm your residence for the year, and claim split-year treatment or the election if they apply.
- Set up separate accounts if you're not Irish-domiciled, and check the treaty for income from home.
- Make sure your payroll isn't on emergency tax.
- Confirm your residence position for the year — count the days properly, including partial ones.
- Claim Split Year Treatment if you arrived partway through the year and had foreign employment income before that.
- Check whether a treaty applies to any income you still receive from home, and gather the evidence for the credit.
- Make sure your Irish payroll is right. If your employer can't get your tax details from Revenue, you'll be on emergency tax, often without realising it — see emergency tax in Ireland for how to check and fix it.
How these play out depends a lot on where you've come from — which treaty applies, how your home country treats you once you've left, and what you've left behind there. We've written country-specific guides for many of the nationalities working in Ireland, including the UK, India, Poland and the United States.
Getting these right in year one can be worth thousands. Getting them wrong usually means overpaying tax you were entitled to avoid, and only finding out when the four-year window has started closing.
Related reading
Questions we get asked
How many days can I spend in Ireland without becoming tax resident?
Up to 182 days in a tax year, provided your days this year and last year together stay under 280. With 30 days or fewer in a year you can't be resident for that year at all.
I'm resident but non-domiciled. Do I have to declare foreign income I haven't remitted?
The remittance basis governs what's taxable, which isn't the same question as what's reportable. Your Irish return has fields covering foreign income and gains, and the correct treatment depends on your specific position. Don't assume that "not taxable" means "not mentioned" — that assumption is a common way for a non-dom position to go wrong.
I work remotely from Ireland for an employer abroad. Where does that get taxed?
Duties performed in Ireland generally give Ireland the taxing right over that employment income, regardless of where your employer sits or where you're paid. Whether your employer needs an Irish payroll, whether a treaty article changes the outcome, and what happens with foreign social security are all live questions — this is one to get checked rather than assume.
I still have bank accounts at home. Can Revenue see them?
Under the Common Reporting Standard, financial institutions in participating jurisdictions report account information to their own tax authority, which exchanges it with the country of tax residence. So yes, information flows. The practical implication is that your Irish return should be consistent with what's being reported.
I've been here three years. What changes now?
You're likely becoming ordinarily resident from the start of your fourth year. The main effect is that your capital gains exposure no longer ends the day you leave — ordinarily resident individuals stay within the charge to Irish CGT on assets wherever situated for three years after their residence ends (with the remittance basis still applying to foreign gains if you're non-domiciled). If you own property or investments abroad and are thinking about selling, the timing question is an Irish one too.
Does any of this affect my immigration status?
Not directly. Tax residence and immigration permission are decided by different bodies under different rules. Being tax resident doesn't grant you anything immigration-wise, and your visa type doesn't determine your tax residence — though keeping your tax affairs in order can matter for some applications.