A child can typically stop using a booster seat around the age of 8 to 12, but age is not the most important factor. The transition depends on the child's height, weight, and, most critically, their ability to pass the 5-step seat belt fit test. Rushing this process can be dangerous, as an ill-fitting seat belt can cause serious internal injuries in a crash.
The key is ensuring the vehicle's lap and shoulder belt fits the child correctly without the booster's elevation. Here’s the simple 5-step test you can do:
- The child’s back must be flat against the vehicle seat.
- Their knees should bend comfortably at the seat's edge.
- The lap belt must lie snugly across the upper thighs, not the stomach.
- The shoulder belt should cross the center of the shoulder and chest, not the neck or face.
- The child must be able to stay in this position for the entire ride.
Most children don't pass this test until they are at least 4 feet 9 inches tall (around 57 inches) and between 80 and 100 pounds. This height is often reached between 10 and 12 years old. State laws vary, but they are often the minimum standard. The American Academy of Pediatrics (AAP) and the National Highway Traffic Safety Administration (NHTSA) recommend using a booster until the child passes the 5-step test, regardless of age.
| State Law Examples (Minimum Requirements) | Booster Seat Law (Height/Weight/Age) | Notes |
|---|
| California | Until 8 years old OR 4'9" tall | Whichever comes first |
| Texas | Until 8 years old OR 4'9" tall | |
| New York | Until 8 years old | Law is age-based only |
| Florida | Until 6 years old | One of the least strict laws |
| Illinois | Until 8 years old | |
Always prioritize the safety guidelines from NHTSA and the AAP over your state's minimum law. When in doubt, keep them in the booster longer; it's the safest choice.
