Car seat law in the US and taking your baby home

There is no single American car seat law

This is the first thing to understand and the reason most national advice reads oddly. The federal government, through NHTSA, sets the standards that car seats must meet. Individual states set the law about how children must be carried. Those state laws differ on the age a child can face forward, the age or height at which a booster is no longer required, and how they are enforced.

So there are two questions to answer, and only one of them has a national answer:

• What is safest? NHTSA and the American Academy of Pediatrics agree, and their advice applies everywhere.
• What is legal? That depends on your state, and the minimum your state accepts is usually below what NHTSA recommends.

NHTSA's recommendations, which apply everywhere

Birth to 12 months: your child under age 1 should always ride in a rear-facing car seat. Infant-only seats can only be used rear-facing; convertible and all-in-one seats have higher limits and let you keep the child rear-facing longer.

1 to 3 years: keep your child rear-facing as long as possible — until they reach the top height or weight limit allowed by the seat's manufacturer. Only then move to a forward-facing seat with a harness and tether.

4 to 7 years: stay in the forward-facing seat with harness and tether until the top height or weight limit is reached, then move to a booster, still in the back seat.

8 to 12 years: stay in a booster until the seat belt fits properly — shoulder belt snug across the shoulder and chest, not the neck or face; lap belt snug across the upper thighs, not the stomach.

Through age 12: keep your child in the back seat. NHTSA is explicit about this, and so is the AAP: the safest place for anyone younger than 13 is the back.

The AAP adds that all infants should ride rear-facing starting with their first ride home from the hospital, and that most convertible seats have limits allowing a child to ride rear-facing for two years or more. The middle of the back seat is generally safest if you can install the seat tightly there, but many vehicles lack lower anchors in the middle position, and a tight installation on the side beats a loose one in the middle.

State law: three worked examples

These are current statutory requirements in three large states. They are not representative of all fifty — check your own state before you rely on any of them.

California

California Vehicle Code section 27360 requires a parent, guardian or driver transporting a child under 8 years of age to secure that child in a rear seat in an appropriate child passenger restraint system meeting federal safety standards. Separately, a child under 2 years of age must be secured in a rear-facing restraint unless the child weighs 40 or more pounds or is 40 or more inches tall, and must be secured within the manufacturer's height and weight limits.

New York

New York's Vehicle and Traffic Law section 1229-c requires children under 4 to be in a federally approved car seat. Children under 4 who exceed 40 pounds, and all children aged 4 to 7, must be in an appropriate federally approved child restraint system. All children must use a federally approved seat in the rear-facing position until they are 2 years old or reach the highest weight or height limit allowed by the manufacturer.

A child aged 4 to 7 who is over 4'9" tall and/or weighs more than 100 pounds may use a seat belt. For a child of 8 or older who is under 4'9" or weighs less than 100 pounds, continued use of a child restraint is recommended rather than required. The state's enforcement guidance flags a rear-facing child in the front seat with an active airbag, and a child under 2 facing forward, as gross misuse.

Texas

Texas Transportation Code section 545.412 makes it an offense to transport a child younger than 8 years of age — unless the child is taller than 4 feet 9 inches — without keeping the child secured in a child passenger safety seat system according to the manufacturer's instructions. A passenger vehicle here means a car, light truck, SUV or van designed to carry 15 or fewer passengers including the driver.

Texas law does not specify a rear-facing minimum age. That does not make forward-facing at 9 months safe; it means the statute is silent and NHTSA's recommendation is what you should follow.

Installation, and the things that actually go wrong

You can install a car seat with either the vehicle's seat belt or the LATCH system (lower anchors and tethers for children). The AAP is clear that the two are equally safe: use whichever works best in your car with your seat, and generally use only one of them, unless both the seat and vehicle manufacturers say you can use both.

Key points:

• The top tether should always be used with a forward-facing seat, whether you installed with the belt or with lower anchors.
• All lower anchors are rated for a maximum 65 pounds combined weight of seat plus child. Above that, switch to the seat belt.
• If installing with a seat belt, the belt must lock. In most newer cars you lock it by pulling it all the way out and letting it retract.
• Never place a rear-facing seat in front of an active passenger airbag.
• Rear-facing-only seats should be used only for travel, not for sleeping, feeding or anything else outside the vehicle.

Getting it checked, and getting it registered

Certified child passenger safety technicians are available across the country and will help you install and use your seat correctly, often at no cost. Many communities also offer virtual seat checks. NHTSA runs a Car Seat Inspection Finder to locate an inspection station or a virtual inspector near you.

Register your car seat with the manufacturer when you buy it. It takes two minutes and it is the only way you will be told about a recall. NHTSA's Car Seat Finder lets you search and compare seats with ease-of-use ratings before you buy.

Most hospitals will expect to see that you have a car seat before you leave with your baby, and many run car seat checks on the maternity unit. Install it and have it checked before your due date rather than on discharge day.

What happens if you get it wrong

Penalties are set by state and are generally modest — a Texas violation is a misdemeanor punishable by a fine of not less than $25 and not more than $250 — but the fine is not the risk. In 2024, 677 children aged 14 and under were killed in traffic crashes while riding in passenger vehicles, and 39% of children killed in car crashes that year were unrestrained. In passenger cars, car seats reduce an infant's risk of fatal injury by 71%.

Where to get help

The National Highway Traffic Safety Administration is the federal authority on car seats and publishes the recommendations, the seat finder and the inspection finder. For the law where you live, go to your state's department of health, department of transportation or DMV rather than a summary site — state requirements change, and secondary sources lag. The American Academy of Pediatrics publishes detailed installation and seat-type guidance for families at HealthyChildren.org. If you have a child with a medical condition or disability, the National Center for the Safe Transportation of Children With Special Health Care Needs maintains a product listing for restraints designed for those needs.