In California, Transitional Kindergarten eligibility now reaches every four-year-old in the state: if your child turns four on or before September 1 of the school year, they can enroll in a free year of TK at your local public or charter school. This universal rule took effect for the 2025–26 school year, closing out a multi-year expansion that gradually lowered the age cutoff. Children who turn five by September 1 skip TK and start traditional kindergarten instead.
The Age and Birthdate Rule
Eligibility turns on one date. A child whose fourth birthday falls on or before September 1 of the school year qualifies for TK that year.1California Legislative Information. California Education Code 48000 The rule is now permanent and does not shift from year to year, which it did during the phase-in that began in 2022–23.
TK is designed as the first year of a two-year kindergarten experience. Children complete TK, then move on to traditional kindergarten the following year.
If Your Child Misses the September 1 Cutoff
A school district or charter school may admit a child whose fifth birthday falls later in the school year if the governing board decides early admittance is in the child’s best interest. The school must give you information about the advantages and disadvantages before you agree.1California Legislative Information. California Education Code 48000 Not every district uses this option, because children admitted this way do not generate state funding until they actually turn five. If you want to pursue it, ask the district directly.
Eligibility Protections When Paperwork or Housing Is a Problem
Families experiencing homelessness or housing instability cannot be kept out of TK over missing documents. Under the McKinney-Vento Homeless Assistance Act, schools must enroll children immediately even when the family cannot produce a birth certificate, immunization records, proof of residency, or proof of guardianship.2National Center for Homeless Education. From the School Office to the Classroom: Strategies for Enrolling and Supporting Students Experiencing Homelessness The school tracks down the missing records with you after your child is already attending.
Foster children have the same protection. Every district has a designated McKinney-Vento liaison who helps families through enrollment in these situations. Ask the front office for that person’s contact information if you run into resistance.
Children with Disabilities
Children with disabilities are entitled to a free appropriate public education starting at age three under the federal Individuals with Disabilities Education Act, and that includes TK-age children. If your child has an Individualized Education Program, the TK classroom must provide the services and supports written into that plan.3U.S. Department of Education. IDEA Preschool Grants for Children with Disabilities (Part B, Sec. 619)
If your child is moving over from Early Intervention services (Part C of IDEA, which covers birth through age two), federal rules require a transition conference at least 90 days before your child’s third birthday. The local school district must be invited, and the goal is an IEP ready to implement by the time your child turns three. When the third birthday lands in the summer and extended school year services are not needed, special education services can begin when the new school year starts.
When an IEP team determines that transportation is necessary for a child to access special education services, the school district provides it. That can include adapted buses, lifts, or other specialized equipment.4U.S. Department of Education. Questions and Answers on Serving Children with Disabilities Eligible for Transportation
Documents You Will Need
Gather these before you start the enrollment process:
- Proof of age, such as a certified birth certificate, passport, or other government-issued document showing your child’s date of birth.
- Proof of residency within the school district, such as a recent utility bill, signed lease, or mortgage statement.
- Immunization records signed by a healthcare provider.
- An oral health assessment. California law requires a dental checkup for children entering public school for the first time; an assessment done in the year before TK or by May of the TK year satisfies the requirement.
Most districts accept scanned uploads through an online enrollment portal. Some still take physical packets or schedule in-person appointments. Check your district’s website for the submission method and any local forms, such as emergency contact cards or medical history questionnaires.
Required Immunizations
California’s immunization requirements for students entering TK through 12th grade specify the following doses:
- Polio: 4 doses
- DTaP: 5 doses
- Hepatitis B: 3 doses
- MMR: 2 doses
- Varicella: 2 doses
Records must be signed by a healthcare provider or clinic official.5California Department of Public Health. California Immunization Requirements for K-12th Grade If your child is behind, ask your pediatrician for a catch-up schedule. Many districts allow conditional enrollment while the remaining doses are completed, but you will need a written plan from the provider.
How to Enroll
Start by identifying your assigned neighborhood school. Your district’s website usually has a school finder tool where you enter your address, or you can call the district’s central enrollment office. Some districts let you request a different school within the district, but your home school is guaranteed a spot.
Submit your documents through whatever method the district uses. After the district receives your submission, you should get a confirmation that your application is under review. If you do not hear back within a couple of weeks, follow up directly with the school’s front office.
Placement notifications typically arrive several months before the school year begins. If your preferred school is at full capacity, the district may assign your child to an alternative site or use a lottery for oversubscribed schools. Districts generally notify affected families with enough lead time to arrange transportation and after-school care.
What the Program Includes
TK is tuition-free, and meals are covered. Since the 2022–23 school year, California’s Universal Meals program requires every public school to provide a free breakfast and a free lunch to any student who requests one, regardless of family income.6California Department of Education. Universal Meals Frequently Asked Questions Your TK student is included, and you do not need to fill out a separate application.
The school day typically runs between three and a half and six hours, depending on the district. That is shorter than a standard workday, which creates a childcare gap for many families. Some schools offer before- and after-school programs through the district or community partners, but availability varies. If you need full-day coverage, ask about the California State Preschool Program, which can provide extended learning and care hours wrapped around the TK day for families who meet income eligibility requirements.
Class sizes are smaller than in older elementary grades. Beginning in the 2025–26 school year, the law requires an average ratio of one adult for every ten students during instructional time.7California Department of Education. Transitional Kindergarten FAQs – Instructional Time and Attendance The ratio is calculated as a site-wide average across all TK classrooms at a school rather than a hard cap on each room, but it still produces more individualized attention than a typical kindergarten class of about 24.