Michigan daycare ratios by age
Michigan's child care center rule (Mich. Admin. Code R. 400.8222, Table 1) sets the staff-to-child ratios below: one adult for every 10 three-year-olds, in groups of no more than 30. Read on 2026-10-31; your licensing consultant has the last word.
Michigan child care center ratios and group sizes
| Age | Children per adult | Largest group |
|---|---|---|
| Infants (under 12 months) | 1 to 4 | 12 |
| Toddlers (12 to 24 months) | 1 to 4 | 12 |
| Two-year-olds | 1 to 4 | 12 |
| Three-year-olds | 1 to 10 | 30 |
| Four-year-olds | 1 to 12 | 40 |
| Five-year-olds (not yet in school) | 1 to 12 | 40 |
How many adults does my room need in Michigan?
Type how many children of each age are in the room.
What the rule says
Infants and toddlers birth-30 mo 1:4 group 12; preschoolers 30 mo-3 yr 1:8 group 24; 3-4 yr 1:10 group 30; 4 yr until school-age 1:12 group 40; school-age 1:18 group 54. (mapped: twos split evenly between birth-30 mo and 30 mo-3 yr, took the younger band; the 30-36 mo row is 1:8 group 24)
Rule: Mich. Admin. Code R. 400.8222, Table 1. Read on 2026-10-31 at law.cornell.edu. Where the rule's ages split one of ours, the younger, stricter figure is shown. This is the rule for licensed centers; family child care homes, school-age care and mixed-age groups have their own rules. A reading of public regulations, not licensing advice.
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