8 – 12 Years Keep your child in a booster seat until he or she is big enough to fit in a seat belt properly. For a seat belt to fit properly the lap belt must lie snugly across the upper thighs, not the stomach. The shoulder belt should lie snugly across the shoulder and chest and not cross the neck or face.

No, age 7 is not too old for a booster seat; in fact, most safety experts and many state laws in 2026 recommend or require them until a child is much older. The primary factor is not age, but height and weight. A child should remain in a belt-positioning booster seat until they can pass the "5-Point Test," which usually happens when they reach 4 feet 9 inches (145 cm) in height. At age 7, most children have not yet reached this height, meaning a standard vehicle seatbelt will cross their neck or face instead of their shoulder, and their lap belt will sit on their stomach instead of their strong hip bones. In a collision, an improperly fitted belt can cause severe internal injuries (Seatbelt Syndrome). Therefore, the American Academy of Pediatrics (AAP) and the NHTSA suggest that many children will need a booster seat until they are between 8 and 12 years old. Safety is about the "fit" of the vehicle's safety systems to the child's body, not a birthday milestone.