Rulebook  /  Residence & citizenship  /  Ireland

Ireland citizenship — reckonable residence

Summary🇮🇪
Day threshold
1825 days
Window
Rolling 3287 days
Direction
Floor — reach at least
Counts
Days in Ireland; arrival and departure days both count
Authority
Department of Justice — Immigration Service Delivery

Ireland citizenship — reckonable residence requires at least 1825 days in Ireland in any rolling 3287-day period. You are trying to reach the number, not stay under it. Five years reckonable residence in the previous nine, including one continuous year immediately before applying. Only time on a qualifying permission counts, which this counter cannot check.

Who it applies to

This matters most if you are:

The rule — and why it exists

Days in Ireland. At least 1825 days in Ireland in any rolling 3287-day period — written as >=1825 / 3287.

Why it exists: residence and citizenship are granted to people who actually live in the country. Presence requirements and absence caps are how that is measured rather than asserted.

Counting the days

  1. On any given day, look back over the 3287 days ending on that day (that day included).
  2. Count every day you were physically in Ireland in that span. Partial days count as full days.
  3. The total must reach 1825. Repeat for every day — there is no reset date.
  4. A day only stops counting once it is more than 3287 days old. Leaving and returning changes nothing.

The free calculator below counts this rule with the same engine the Dwelltime app ships.

Check it with the free tool

Examples

Example 1 — 1204 days inside, checked at the end of the window

Stays: Ireland 2026-03-01 → 2029-06-16. Checked on 2029-06-16.

Result: Days in Ireland: 621 more days needed (1204 of 1825 in Ireland), earliest 2031-02-27.

Example 2 — 1825 days used, then trying to return

Stays: Ireland 2026-01-01 → 2030-12-30. Checked on 2031-01-30.

Result: Days in Ireland: reached — 1825 of 1825 days in Ireland.

Example 3 — Two separate stays that add up past 1825

Stays: Ireland 2026-01-01 → 2028-12-30; Ireland 2030-07-02 → 2033-06-30. Checked on 2033-06-30.

Result: Days in Ireland: reached — 2190 of 1825 days in Ireland.

Exceptions & edge cases

Common misconceptions

Frequently asked questions

Is the 1825-day count per calendar year or rolling?

Rolling 3287 days. The window rolls forward one day at a time.

Do arrival and departure days count?

Yes — any part of a day counts as a day.

Where does this rule come from?

Department of Justice — Immigration Service Delivery: Citizenship by naturalisation. The link is verified on every build; if it stops resolving the build fails.

This rule is tracked in Dwelltime

  • Counts your days for this rule from the trips you record
  • Shows the last safe day, or the days still needed, before you book
  • Explains every counted day and every uncounted one
  • Runs alongside your other visa, tax and residency rules
Get the app

Sources

Related rules

For information only. This page is a plain-English summary of publicly available rules, not tax, legal or immigration advice. Rules change and depend on your personal circumstances — always confirm with the official source above and a qualified professional before acting.