Mixed-Age Room Ratios 2026: Worked Examples for Irish Creches
Last updated: August 2026
Adult:child requirements in a mixed-age room are worked out by age band and service type, then added together. It is not one blanket ratio based only on the youngest child. These examples follow the Child Care Act 1991 (Early Years Services) Regulations 2016.
How mixed-age ratio rules work
- Count every child physically present in the room.
- Place each child in the age band for your service type (full-day/part-time or sessional).
- Divide the number of children in each band by that band's ratio.
- Add the adult shares and round up to a whole number of adults.
Worked examples (full-day / part-time)
One child aged 1 (1:5) is 0.2 of an adult. Four children aged 3 (1:8) are 0.5. Combined adult share: 0.7, so the minimum is 1 adult. The base tables are in Tusla Ratio Requirements 2026.
Sessional contrast
Sessional services use a different table, including 1:11 for children aged 2½ to 6. A child who stays beyond 3.5 hours moves onto the full-day/part-time ratios.
Common mistakes
- Applying the youngest child's ratio to the whole room.
- Forgetting a child who was moved in for part of the day.
- Counting an adult who has left for a break. See ratios during breaks and lunches.
- Building the roster on an average age mix that never matches the live room.
Disclaimer: This guide is for general information only. It is not legal advice. Always check the current Tusla regulations for your service type.