Country guideTax residency
Tax residency in Ireland: how the day count works
Ireland treats you as tax resident if you spend 183 days or more in the State in a calendar tax year, or 280 days or more across that year and the previous one taken together, with at least 30 days in each of the two years. Any part of a day counts as a full day.
What is the day threshold in Ireland?
Two thresholds, and only one of them has to be met. The first is the familiar single-year line: 183 days or more in the State during a tax year makes you resident for that year. The second is the two-year look-back, and it is the one people miss. Add your days in the current tax year to your days in the previous tax year, and if the pair reaches 280, you are resident in the later year even though neither year alone came close to 183.
A floor sits under the look-back. If you spend 30 days or fewer in the State in a tax year, you are not resident for that year, and those days drop out of the 280-day sum entirely. So a single week of meetings in Dublin cannot be stacked onto a heavy year to push you over. Revenue sets out both tests, and PwC's Ireland summary states them the same way.
| Day threshold | 183 days or more in one tax year, or 280 days or more over two |
|---|---|
| Counting window | Calendar tax year, plus a one-year look-back for the 280-day test |
| Partial days | Present for any part of a day counts as a full day |
| Other triggers | Ordinary residence after three consecutive resident years; domicile is separate again |
| Tax authority | Revenue, the Office of the Revenue Commissioners |
| Return deadline | 31 October following the tax year, mid November via ROS |
| Source | Revenue, PwC Worldwide Tax Summaries |
Calendar year or rolling window?
Calendar year, with a memory. The Irish tax year runs 1 January to 31 December, and the 183-day test resets cleanly at midnight on New Year's Eve. The 280-day test does not reset: it reaches back one full year, which makes Ireland stricter than a pure calendar-year country such as Spain and simpler than a true rolling window such as Greece. Practically, you cannot plan an Irish year in isolation. Two consecutive stays of five months each are 300 days or so, and the second year is a resident year.
Do partial days count?
Yes, and Revenue is explicit about it: you are present in the State for a day if you are here for any part of that day. There is no midnight rule and no minimum hours. A Friday evening arrival and a Sunday morning departure is three days on the tally. Over a year of short trips that convention adds up fast, which is why people who count only full nights tend to run 20 or 30 days behind their real figure.
What else can make you resident besides days?
Nothing else creates residence itself. Irish residence is a pure day count, with no home test and no centre-of-interests test attached to it. What the day count does create is a second status called ordinary residence. Once you have been resident for three consecutive tax years, you become ordinarily resident from the fourth year, and you stay ordinarily resident for three tax years after you stop being resident. That tail keeps parts of your worldwide income within Irish charge after you have physically gone.
Domicile is a third and separate concept, closer to the country you treat as your permanent home. Residence, ordinary residence and domicile combine to set what Ireland taxes, and you can hold any combination of the three.
A worked example with 2026 dates
Under 183 in both years, resident anyway
A contractor works two long Irish projects in consecutive years, keeping each stay well under 183 days.
| Stay | Dates | Days |
|---|---|---|
| Dublin, 2025 | 3 Mar to 30 Jul 2025 | 150 (29 + 30 + 31 + 30 + 30) |
| Dublin, 2026 | 12 Jan to 31 May 2026 | 140 (20 + 28 + 31 + 30 + 31) |
| Two-year total | 290 |
Neither year reaches 183, and both clear the 30-day floor, so the look-back applies. At 290 days across the pair he passes the 280-day test and is Irish resident for 2026. Leaving on 20 May 2026 instead would have given him 129 days that year and a two-year total of 279, one day short of the test.
How do I track my days for Ireland?
Keep two running totals, this tax year and last, and treat 280 as the number that matters more often than 183. Count arrival and departure days in full. Because Ireland is outside Schengen, your Irish days sit in their own count and never offset a Schengen tally.
Check your Irish day count
The free 183-day calculator totals your 2026 presence days. Run 2025 as well, then add the two figures and compare the sum against 280.
Warned before day 183
Staydays counts your Irish days automatically and alerts you before the threshold, with last year's total still on file.
Frequently asked questions
How many days make you tax resident in Ireland?
183 days or more in one tax year. There is a second route: 280 days or more counted across the current tax year and the one before it, provided you spent at least 30 days in each of those years. Either test on its own makes you resident.
How does the 280-day look-back rule work?
Revenue adds your days in the current tax year to your days in the previous one. If the two years together reach 280, you are resident in the later year. The 30-day floor protects short visits: spend 30 days or fewer in a year and you are not resident for that year, and those days are ignored in the look-back.
Is Ireland part of the Schengen 90/180 count?
No. Ireland stays outside Schengen and runs its own entry rules, so days in Dublin never touch your Schengen 90/180 allowance. Immigration Service Delivery grants visitor permission of up to 90 days at the border. That 90-day permission is an immigration limit and has nothing to do with the 183-day tax test.
What is ordinary residence in Ireland?
A separate status that attaches after three consecutive tax years of Irish residence. It starts in the fourth year and continues for three tax years after you stop being resident, so a departing resident stays ordinarily resident for a while. Domicile is a third status again, closer to the idea of a permanent home.
When does the Irish tax year run?
1 January to 31 December. Revenue sets the income tax return and balancing payment deadline at 31 October in the year after the tax year, with an extension into mid November for returns filed and paid through the Revenue Online Service. Preliminary tax for the current year falls due on the same 31 October date.
Do partial days count in Ireland?
Yes. Revenue treats you as present in the State for a day if you are here for any part of that day, so both the flight-in day and the flight-out day land on the tally. A weekend in Cork is three days on the count, not one.
Which authority decides Irish tax residency?
Revenue, formally the Office of the Revenue Commissioners. It applies the residence tests in the Taxes Consolidation Act 1997, collects the income tax return, and decides your residence, ordinary residence and domicile position. Immigration Service Delivery is a separate body, and visitor permission granted at the airport says nothing about your tax status.
This guide is general information, not legal or tax advice. Rules change and individual circumstances differ. Confirm details with official sources or a qualified advisor.
Last updated: 2026-08-05