Ireland's 183-Day and 280-Day Tax Residency Tests
Either the annual 183-day test or the two-year 280-day test can establish tax residence. The two-year route also requires at least 31 days in the year being assessed.
Last verified: September 2026
In short: you become an Irish tax resident for a year if your days present in Ireland reach 183 or more in that tax year. The alternative is 280 or more across the current and previous tax year combined, with at least 31 days in the current year. A year with 30 days or fewer is ignored for this two-year calculation. The Irish tax year is the calendar year, days do not need to be consecutive, and any part of a day counts.
- Threshold
- 183 days or more
- Counting window
- Tax year (calendar year)
- Two-year test
- 280 days across the current and previous year, with at least 31 in the current year
- Days counted
- Any part of a day present
- Tax year
- 1 January – 31 December
- Legal basis
- Taxes Consolidation Act 1997, s 819
On this page
The rule
Ireland treats you as tax resident for a year under either of two tests. Meeting either one is enough:
- The 183-day test. You are resident if you are present in Ireland for 183 days or more in a single tax year. The Irish tax year is the calendar year, so days are totalled from 1 January to 31 December and the count resets each new year.
- The 280-day two-year test. Even if you stay below 183 in one year, you are resident for a tax year if your days present total 280 or more when that year is added to the year before it. A year in which you spend 30 days or fewer does not count toward the 280. In particular, a large previous-year total cannot make you resident under this test if the current year contains only 30 days or fewer.
Days do not need to be consecutive. Several separate trips in the same year are added together, and you are counted as present for a day if you are in Ireland for any part of it.
How to count it
- List every Ireland trip that falls within the tax (calendar) year.
- Count each day you were present in Ireland, including any day you were present for only part of the day.
- Add the days across the whole year. If the total is 183 or more, you are resident for that year.
- If you are below 183 but have at least 31 days this year, add this year's days to the qualifying days from last year. A prior year of 30 days or fewer contributes nothing. If the total is 280 or more, the two-year test is met for this year.
Example. 150 days in Ireland one year, then 140 days the next.
Neither year alone reaches 183, but the two years total 290 days. That is above 280, so you are an Irish tax resident for the second year.
Ireland tax residence calculator
Tap your days in Ireland and pick the year to test. The calculator checks both tests: 183 days in that calendar year, or 280 days across that year and the year before. A year of 30 days or fewer adds nothing to the 280, and the 280 test needs at least 31 days in the year you test.
Timeline
Why 280 days is not always enough
Suppose you spent 260 days in Ireland last year. This year, 20 days brings the recorded two-year total to 280, but the two-year residence test is not yet met. Even at 30 days this year, when the total reaches 290, the current-year minimum is still not satisfied.
At 31 days this year, the combined total is 291 and the two-year route applies. You do not also need to reach 183 this year. These are alternative routes for the same person, not separate rules you can choose between.
The assessment moves with the calendar year. When a new year starts, it is combined with its immediate predecessor; days from two years earlier leave this comparison. An ordinary-residence status, a treaty question or an election to be resident is a separate issue.
Which recorded days may need separate review?
Any part of a day normally counts under the modern rule. Revenue identifies exceptions for remaining airside and for certain unforeseen, unavoidable circumstances preventing departure. A trip log alone does not establish every exception. Keep evidence of the circumstances if your assessment depends on one, and use Revenue's guidance in the official sources below.
Why residency matters
Crossing either threshold is not just a status label. An Irish tax resident is generally chargeable to Irish tax on worldwide income, while a non-resident is taxed mainly on Irish-source income. Domicile matters too: a resident who is not domiciled in Ireland may be taxed on foreign income only to the extent it is remitted to Ireland. If another country also claims you as resident, a double-tax treaty settles residency through tie-breaker rules such as permanent home and centre of vital interests.
Track both Irish day tests in AtlasDays
Track both day tests automatically from your travel log with the Ireland Tax Residency preset, including the two-year route’s 31-day minimum. Exceptional day exclusions need separate review.
Get the appFAQ
How many days can you stay in Ireland without becoming a tax resident?
Up to 182 days keeps you below the annual day test. The two-year route can still apply if you have at least 31 days in the current year and at least 280 qualifying days across that year and its predecessor. Other residence rules can also matter.
What is Ireland's 280-day rule?
The two-year test combines the year being assessed with its predecessor. It requires at least 280 qualifying days in total and at least 31 days in the year being assessed. A year with 30 days or fewer is ignored for this test.
How does Ireland count a day of presence?
You are present for a day if you are in Ireland for any part of it. The tax year is the calendar year, so days are totalled from 1 January to 31 December and do not need to be consecutive.
About this article: AtlasDays provides general information, not legal, tax, or immigration advice. Rules change and outcomes depend on your circumstances, so never rely on it alone: check the linked official source or ask a qualified professional.