California childcare ratios.
The staff-to-child ratios below are the commonly cited requirements for licensed childcare centers in California, regulated by the California Department of Social Services, Community Care Licensing.
| Age band | Ratio (children per adult) | Staff for 20 children |
|---|---|---|
| Infants (under 12 months) | 1:4 | 5 |
| Toddlers (2-year-olds) | 1:6 | 4 |
| Preschool (4-year-olds) | 1:12 | 2 |
| School-age | 1:14 | 2 |
California note: California licenses infant, toddler-option, preschool, and school-age components separately; the toddler option (18 to 36 months) is 1:6.
Ratios shown are the commonly cited center-based licensing requirements, simplified into four age bands. States define age bands differently (often by month), and family/home programs, license-exempt programs, and local rules can differ. This information is provided for general reference only, is not legal or licensing advice, and Seedling makes no guarantee of its accuracy or completeness. Staffing and licensing decisions are your responsibility: always verify current requirements with your state licensing agency. Last reviewed July 2026. Sources: the California Department of Social Services, Community Care Licensing (find it via childcare.gov's California resources ) and the federal ratio guidance , which hold the authoritative rules.
How many staff do you need?
Enter your enrollment by age group and the free calculator applies California's ratios, rounding up per group the way licensing does.
Open the ratio calculatorWhat these ratios mean for tuition
Staffing rules like these set the cost floor for care: the median California center charges about $354 a week for an infant spot. See median prices for every California county.
California childcare costs by countyCommon questions
What is the infant ratio for childcare centers in California?
California's commonly cited center-based infant ratio is one adult for every 4 infants. California licenses infant, toddler-option, preschool, and school-age components separately; the toddler option (18 to 36 months) is 1:6. Verify current rules with the California Department of Social Services, Community Care Licensing.
How many staff do I need for 20 preschoolers in California?
At California's commonly cited 1:12 preschool ratio, 20 four-year-olds require 2 staff (20 divided by 12, rounded up). Try your own numbers in the free ratio calculator.
Who regulates childcare licensing in California?
The California Department of Social Services, Community Care Licensing licenses child care in California and publishes the authoritative ratio, group size, and staffing rules. Requirements change, so always confirm against the current regulations.
How do centers stay in ratio during the day?
Ratios drift as children arrive, leave, and move rooms. Software like Seedling tracks each room live as children check in and staff clock into rooms, and flags a room the moment it needs another adult, with an audit trail for licensing visits.