Transitional kindergarten is free; daycare is not. That makes TK the obvious pick on cost for a four-year-old, with one large catch: it runs on the school day and school year, so it does not cover a full workday. The real decision is whether you can fill the afternoon and summer gap. If you can, TK wins. If you cannot, daycare may be simpler.
Sources used: the California Department of Education on universal transitional kindergarten and the Universal Prekindergarten program under AB 130 (2021); the U.S. Department of Labor (DOL) National Database of Childcare Prices, 2024 release, for daycare price ranges; and NAEYC (the National Association for the Education of Young Children) 2024 on early-childhood quality. TK availability and rules vary by state and district.
The decision in one paragraph
Free beats paid when the hours work. Transitional kindergarten is a free public grade for four-year-olds, now universal in California, and it delivers a school-readiness year at no tuition. The problem it creates is coverage: TK ends in the early afternoon and closes for summers and breaks, so two working parents still need before-care, after-care, or summer care. Daycare costs real money but holds your child through the workday, year-round. Choose TK if it exists where you live and you can cover the gap, ideally with district wraparound or a daycare that offers it. Choose daycare if you need seamless full-day coverage and cannot patch the TK schedule together.
What is transitional kindergarten?
Transitional kindergarten, usually shortened to TK, is a free public-school grade for four-year-olds, taught the year before kindergarten. In California it is now universal: as of the 2025-26 school year, TK is open and free to every child who turns four by September 1, funded through the state's Universal Prekindergarten plan under AB 130 (2021), per the California Department of Education. A TK classroom is staffed by credentialed teachers and follows an early-learning curriculum aimed at kindergarten readiness. The key thing to understand is that it is part of the school system, so it runs on a school-day schedule and a school-year calendar rather than the long, year-round hours a daycare keeps.
How do the costs compare?
This is where TK is hard to beat: it is free where it is offered. California funds TK for all eligible four-year-olds, so families pay no tuition for the program itself, per the California Department of Education. Daycare, by contrast, runs about $8,000 to $17,000 a year per child depending on county and age, per the U.S. Department of Labor National Database of Childcare Prices 2024. On paper that is a large saving. The honest asterisk is that the comparison is not apples to apples on hours: TK covers part of the day, and the wraparound care you add to match a daycare schedule has its own cost. Even so, a free instructional core plus paid aftercare usually lands well below full daycare tuition.
| Factor | Daycare | Transitional kindergarten |
|---|
| Cost | About $8,000–$17,000/yr per child | Free where offered as public TK |
| Ages served | Infancy through preschool | Four-year-olds, year before kindergarten |
| Schedule | Full-day, year-round | School day, school-year calendar |
| Coverage gaps | Few; built for a workday | Afternoons, summers, school breaks |
| Teachers | Licensed early-childhood staff | Credentialed public-school teachers |
| Best for | Full-day coverage, all ages | Free readiness year if you cover the gap |
Source: California Department of Education; U.S. Department of Labor National Database of Childcare Prices 2024. TK rules vary by state.
Does TK cover your work hours?
No, and this is the filter that decides the choice for most working families. Because TK is part of the school system, it runs the school day and the school-year calendar, which means it typically ends in the early afternoon and shuts down for summers and holidays. A daycare is built to hold a child through a workday, all year, so switching to TK can open a daily coverage gap of several hours plus long summer stretches. Many districts offer expanded learning programs or before- and after-care, and some daycares run TK wraparound specifically to solve this. Confirm exactly what your district provides, in writing, before you assume free TK replaces your daycare schedule.
Honest tradeoff. TK trades money for hours. You get a free, credentialed readiness year, and you take on the logistics of covering afternoons, summers, and school breaks. For some families the wraparound is easy and the savings are large. For others the patchwork of pickups and summer camps costs more time and stress than it is worth. Be realistic about who is doing the 1pm pickup before you count the savings.
Is TK available where you live?
Not everywhere, so this has to be checked locally before you plan around it. TK is most established in California, where it is now universal for four-year-olds. Other states run their own free public pre-K programs under different names, with different age cutoffs and eligibility rules, and some places have no public option for four-year-olds at all. Do not assume the California model applies to your state. Contact your local school district and your state's early education agency to confirm whether a free TK or comparable pre-K program exists, when your child would be eligible, and what hours and wraparound care come with it.
How should you choose?
Confirm availability, then test the schedule. If free TK exists where you live and you can comfortably cover the hours it does not, it is the strongest option for a four-year-old on both cost and readiness. If you need seamless full-day, year-round coverage and the wraparound options are thin or expensive, a daycare that runs all day may be the simpler path. Many families land in the middle, enrolling in TK for the free instructional day and adding daycare wraparound for the afternoon and summer, which captures most of the savings without the coverage headache.
Choose daycare if
- You need full-day, year-round coverage.
- No free TK is offered where you live.
- Wraparound care is thin or costly near you.
- You want one program for the whole day.
Choose transitional kindergarten if
- Free public TK is available for your four-year-old.
- You can cover afternoons, summers, and breaks.
- A credentialed readiness year is a priority.
- Your district or a daycare offers wraparound care.
Compare your real costs. Estimate full-day daycare for your city in our cost calculator, then read daycare vs pre-K to see how free public programs change the math.
Related reading: our daycare vs pre-K comparison, the daycare vs staying home until pre-K guide, and the daycare by age overview.
