California has some of the strictest child passenger laws in the country: rear-facing until age 2, a car seat or booster until age 8 — always in the back seat. Here’s the full breakdown, verified against the California Highway Patrol and the Vehicle Code.
Law data last verified against official state sources: October 4, 2026.
Quick answer
Children under 2 must ride in a rear-facing car seat (unless 40+ lbs or 40+ inches tall). Children under 8 must ride in a car seat or booster seat in the back seat. At 8 years old or 4’9″ tall, a properly fitted seat belt is the legal minimum.
California car seat requirements by age and size
| Stage | What California law requires |
|---|---|
| Rear-facing | Children under 2 years old must ride in a rear-facing car seat, unless the child weighs 40 or more pounds or is 40 or more inches tall — secured per the manufacturer’s height and weight limits. |
| Forward-facing | After outgrowing the rear-facing limits and while under 8: a forward-facing seat with harness, then a booster seat — always in the back seat. |
| Booster seat | Required as part of the under-8 rule. At 8+ or 4’9″+ a booster is optional, but CHP recommends one until the seat belt fits properly (roughly 8–12 years). |
| Seat belt only | Legal minimum at 8 years old or 4’9″ tall. Passengers 16 and older fall under California’s mandatory seat belt law. |
Fines and penalties in California
Fine: First offense $100 (the court may reduce or waive it for economic hardship); penalties increase for repeat offenses.
Front seat rules in California
Front-seat rule: Children under 8 may not ride in the front seat unless the vehicle has no rear forward-facing seat.
The official law
- Statute: Cal. Veh. Code §§ 27360, 27363
- Official source: California Highway Patrol
Research note: AB 435 (2025) proposed redefining “properly restrained” with a 5-step belt-fit test effective January 1, 2027 — verify the current status with official sources before relying on it.
California car seat law FAQs
What is the fine for a car seat violation in California?
A first offense carries a $100 fine (waivable for economic hardship), with higher penalties for repeat offenses.
When can my child stop using a booster seat in California?
The law requires a car seat or booster until age 8. After that a seat belt is the legal minimum, but CHP recommends keeping a booster until the belt fits properly — typically between 8 and 12 years old and at least 4’9″ tall.
Does California require rear-facing until age 2?
Yes. Children under 2 must ride rear-facing unless they weigh 40+ pounds or are 40+ inches tall, and the seat must be used within the manufacturer’s limits.
Can my child ride in the front seat in California?
Not under age 8 — unless the vehicle has no rear forward-facing seat. CHP also warns never to place a rear-facing seat in front of an active airbag.
Where can I read the official California car seat law?
Statute: Cal. Veh. Code §§ 27360, 27363. Official source: California Highway Patrol.
Check another state
Driving across state lines? Requirements change at the border — use our interactive car seat law checker to look up any state by your child’s age, weight, and height.
Related state guides:
This page is for general informational purposes only and is not legal advice. Child passenger safety laws change — always verify current requirements with your state’s DMV, highway safety office, or the official statute linked below before making decisions.