Northern Ireland residents capped at one remote day a week in the Republic's public service
Northern Ireland residents are the only people in the Republic of Ireland’s public service, aside from posted consular staff, permitted to work remotely from outside the State. The permission is narrower in practice than it sounds: employers cap cross-border remote working at one day a week and require a written agreement recording it.
The constraint is social security coordination rather than policy preference. Performing 25% or more of your working time in your country of residence moves your social insurance from Irish PRSI to UK National Insurance. Two or three days at home amounts to 40–60% of working time, comfortably past the threshold, so one day is the most that keeps an employee inside the Irish system.
Why this matters
The 25% “substantial part” test catches any European remote worker who lives in one country and is employed in another, whatever the employer’s own policy says. If you are negotiating a cross-border arrangement, the number of home days is not a matter of preference — past a quarter of your working time, your employer’s payroll obligations change country, which is why the answer is so often one day rather than three. Ask about it before you accept, because the employer may not raise it until payroll does.
There is a tax layer sitting on top of the social security one. EY Ireland notes that spending four days a week in Ireland is likely to trigger Irish tax residency, obliging PAYE withholding on the whole of your income — including the day worked in the UK — recoverable only by filing a return. Two separate rules, two separate thresholds, and they do not move together.
What to watch
The specific wording of the Republic’s public-service policy comes from a single account, so anyone relying on it for their own arrangement should ask their employer for the governing circular rather than working from press coverage. The underlying 25% coordination rule is the settled part and applies far beyond the public sector.