When Should Fathers Start Paternity Leave?
Last updated 12 November 2026 · Paternity Leave Calculator editorial team
There's no single right answer — it depends on your family's needs and the rules where you live.
Starting at the birth
Most fathers start leave on the day of the birth to support their partner during recovery and the first days at home.
Starting later
Some prefer to start once family visitors leave or when their partner returns to work. Check the window: UK paternity leave must be taken within 52 weeks of the birth, while Irish paternity leave must be taken within 26 weeks.
Splitting leave
Where rules allow, splitting leave into blocks can spread support across the first months. UK fathers can take two separate weeks.
Work out your own dates
Use our free calculator to estimate your leave start, end and return date.
Open the calculatorThis guide summarises official sources for general information and is not legal advice. Rules change — confirm your entitlement with your employer or the relevant authority.