Washington Daycare Ratios: Staff-to-Child Ratios and Group Sizes by Age

Washington licenses child care centers and family homes through the Department of Children, Youth, and Families (DCYF), whose foundational quality standards in chapter 110-300 WAC govern both settings.

For centers, the ratio table in WAC 110-300-0356 pairs each age band with a staff-to-child ratio and a maximum group size.

Infants from birth through 11 months are 1:4 with a maximum group of 8 infants, or 1:3 with a group of 9 infants under the alternate option.

Toddlers — the band runs from 12 through 29 months — are 1:7 with a maximum group of 14 children, or 1:5 with a group of 15 under the alternate.

The preschool band covers children 30 months through 6 years old who are not attending kindergarten or elementary school, at 1:10 with a maximum group of 20 children, and school-age children 5 through 12 who are enrolled in kindergarten or elementary school are 1:15 with a maximum group of 30 children.

The group size caps how many children form one group, separately from the staff-to-child ratio.

Washington caps groups at 8 children for infants under the 1:4 pairing and 9 under the 1:3 alternate, 14 children for toddlers under the 1:7 pairing and 15 under the 1:5 alternate, 20 children for preschoolers and 30 for school-age children.

The two limits answer different staffing questions: the ratio sets how many staff members a group needs, while the group size caps how large any one group can be, so it decides how many groups an enrollment splits into.

The infant and toddler alternates show the trade working in both directions — 1:3 over 1:4 and 1:5 over 1:7 each allow a larger maximum group while lowering the number of children per staff member.

Washington allows a center to combine children of different age groups for no more than the first two hours of the day or the last two hours — at most two hours a day — and the combined group keeps the ratio and group size required for the youngest child in it.

Opening and closing have their own edge case: one staff member may be alone with the only group of children on-site for up to an hour at the beginning or end of the day, when a second background-cleared adult is on-site and readily available.

On nap time, our research found no separate nap-time ratio relaxation for centers in the ratio sections of chapter 110-300 WAC we read, and the point was not exhaustively confirmed, so a director planning around a nap hour should confirm the current rule with DCYF.

Every child in licensed care counts toward capacity and ratio, including children related to staff or the licensee.

On the staff side, Washington names three classroom roles: lead teacher, assistant teacher and aide.

Aides carry a ratio condition: an aide may count in ratio only under the continuous oversight of a lead teacher, assistant teacher, director, program supervisor or family home licensee.

Training attaches to the ratio as well: at least one early learning provider counted in the staff-to-child ratio for each group must hold current adult and pediatric first aid, adult and pediatric CPR and, if applicable, infant CPR certificates, and staff counted, or potentially counted, in ratio must hold that training with a live hands-on component.

The education and certificate requirements for lead and assistant teachers are separate qualification rules in the same chapter of the WAC.

Family homes do not use the center table.

Washington caps a family home license at 12 children, and state statute defines a family day care provider as someone who regularly provides early childhood education and early learning services for not more than 12 children at any given time in the provider's home.

Capacity is tiered by experience: a licensee with under 1 year of experience may request a capacity of up to 6 children, with no more than 3 of them under age 2 in the first year; 1 to 2 years allows up to 8 children alone or 9 with an assistant; and 2 or more years allows up to 12 children with an assistant.

DCYF may waive the 12-child cap so a provider with at least 3 years operating under a full, nonexpiring license can serve 13 through 16 children.

Two staff are required whenever more than 6 children are in care and any is under 2 years, more than 8 and any is under 3 years, or more than 10 and any is under school age.

Take a small center with three rooms open at once: an infant room with 8 children, a toddler room with 14 children aged 12 through 29 months, and a preschool room with 20 children.

The infant room needs two staff members (8 children at 1:4), the toddler room needs two (14 at 1:7), and the preschool room needs two (20 at 1:10) — six staff members on the floor.

The alternates change the arithmetic: a single infant group of 9 at 1:3 needs three staff members, one more than a group of 8 at 1:4.

Boundary rules sit outside the room counts — age groups can combine only in the first or last two hours of the day under the youngest child's ratio and group size, and one staff member can hold the only group on-site alone for up to an hour at the start or end of the day when a second background-cleared adult is readily available.

This is arithmetic on the licensing table — an illustration of how the numbers combine, not a staffing plan for a particular center; enrollment shifts through the day, and a center confirms its coverage with DCYF.

The school-age band is 1:15 with a maximum group of 30 children, and it applies to children 5 through 12 who are enrolled in or attending kindergarten or elementary school.

The boundary matters when a center staffs before- and after-kindergarten care: the preschool band covers children 30 months through 6 years old who are not attending kindergarten or elementary school, so a 5-year-old who has not started kindergarten sits in the preschool band, and the move to 1:15 comes with kindergarten or elementary school enrollment.

For staffing, that makes enrollment status rather than age alone the switch between the two bands.