If you have ever heard "it is only one week's notice" and mentally translated that to "five working days", you are not alone. Irish minimum notice rules are written in weeks, and weeks are blunt instruments: weekends and public holidays do not pause them.
This article is about the surprises and practical traps. If you want the full technical breakdown (definitions, edge cases, and calculator settings), jump to our Technical Reference page.
Quirk #1: the 13-week line is real (and it is earlier than people think)
The statutory minimum notice regime kicks in once an employee has 13 weeks' continuous service. Before that, the statutory minimum may not apply (but the contract still might).
That 13-week threshold comes up constantly in probationary exits, casual roles that quietly became "regular", and reorganisations where start dates are fuzzy.
What to do: treat the start date as evidence-based (contract + payroll + any breaks), and assume the contract notice term governs unless you have checked the statutory minimums.
Quirk #2: "one week" is 7 calendar days, not 5 working days
The most common mistake is not malicious -- it is linguistic. People say "week" and mean "work week". The statutory minimums are measured in weeks, which are effectively 7-day blocks for planning purposes.
Diary consequence: if notice is given on a Thursday, "one week" usually lands on the following Thursday -- and the weekend in the middle does not change anything.
Quirk #3: employers and employees are on different statutory ladders
People often assume the same notice applies both ways. It does not.
- Employees: after 13 weeks' service, the statutory minimum is 1 week (unless the contract requires more).
- Employers: the minimum increases with service (2 years, 5 years, 10 years, 15 years).
What to do: if you are building a "last day" timeline, always identify which direction you are counting (resignation vs termination) before you count anything.
Quirk #4: contracts can increase notice, but cannot undercut the statutory floor for dismissal
Contracts often:
- require more notice than the statutory minimum (especially for senior roles), and/or
- require notice in months rather than weeks (which introduces calendar-month counting issues).
But where statutory minimum notice applies, a contractual term cannot reduce the employer's minimum obligation below the statutory baseline.
What to do: treat the statute as the minimum safety net, then apply the contract if it is longer.
Quirk #5: payment in lieu is common -- but it is not automatic
In practice, many employers prefer to pay in lieu of working notice, especially where access to systems, clients, or confidential information is involved. The legal ability to do that cleanly often depends on the contract wording and the broader dismissal context.
What to do: if you are planning a termination, check the contract for (a) PILON wording and (b) any garden leave clause before you assume you can swap notice for cash.
A quick sanity checklist before you hit calculate
- Which direction? Resignation vs dismissal.
- Have you crossed 13 weeks? If yes, statutory minimum notice is in play.
- Is the notice term in weeks or months? (Months are calendar months in many contexts.)
- Any contract override? Longer notice, special service definitions, or probation clauses.
Need the dates without the mental overhead? Use the calculator to validate your timeline.
Try it -> Open the calculator
Frequently Asked Questions
Q: Is one week always 7 calendar days?
A: Yes. Statutory minimum notice is measured in weeks, so a one-week notice is
7 calendar days, including weekends and public holidays.
Q: When does the statutory minimum notice apply?
A: After 13 weeks of continuous service. Before that, the contract governs,
but the statutory minimum may not apply.
Q: Do public holidays extend the notice period?
A: No. Because notice runs in calendar weeks, public holidays do not pause or
extend the count.
Q: Can an employer pay in lieu of notice without a clause?
A: It depends. Many contracts include a PILON clause, but without one, paying
in lieu may expose the employer to risk. Always check the contract terms.
Sources & Further Reading: