Traffic Safety · Car Seat & Booster
Car Seat & Booster Laws in Tennessee
When your child can move from a booster to a seat belt in Tennessee, plus rear-facing, front-seat, and the fine, with the law kept separate from best practice.
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Check your child's stage in Tennessee
Enter age, height, and weight. We show the Tennessee law separately from best practice.
4′9″ = 57 in. Enter only the boxes you have; this state uses booster required ages 4–8 while under 4′9″; a child exits at age 9 or once 4′9″ (57″) or taller.
Educational guide to the minimum legal requirement, not legal or safety advice. Best practice is often stricter than the law. Always follow your car seat’s manufacturer instructions, and confirm the current rule with the official source below (last reviewed 2026-07-11).
The four stages in Tennessee
Each rung is tagged Law or best practice.
A child under 1, or any child weighing 20 lb or less, must be secured rear-facing in a child restraint meeting federal standards, in the rear seat if available.
A child age 1 through 3 who weighs more than 20 lb must be secured forward-facing in a child safety seat meeting federal standards, in the rear seat if available.
A child age 4 through 8 who measures less than 4′9″ (57″) must ride in a belt-positioning booster, in the rear seat if available. A child in this age range who is already 4′9″ or taller uses a seat belt instead.
Exit rule: booster required ages 4–8 while under 4′9″; a child exits at age 9 or once 4′9″ (57″) or taller. The adult belt must fit — lap low across the hips, shoulder belt across the chest.
Front seat, the fine & the source
Seating rule, the exact booster logic, and any recent change.
The statute requires each stage to be used in the rear seat “if available.” This is a codified placement preference, not the strict under-a-set-age rear-seat rule some states use.
| Booster exit logic | Age 8 or 4′9″ — whichever first |
| Seat belt OK | From age 9 (through 12), or earlier once age 4–8 and 4′9″ or taller |
| First-offense fine | $50 The driver is responsible for restraining children under 16 and may be fined $50 for a violation. The fine is waivable in some courts on proof of obtaining a proper restraint. |
| Statute | Tenn. Code §55-9-602 |
What Tennessee parents get wrong
Tennessee passed the first child-restraint law in the country in 1978, and its current statute (§55-9-602) is unusually specific about each stage. Rear-facing is real law here, not just best practice: a child under 1, or any child 20 lb or less, must ride rear-facing. Ages 1 through 3 (over 20 lb) ride forward-facing, and ages 4 through 8 who are shorter than 4′9″ must use a booster. The booster exit is age or height: a child leaves it at age 9, or earlier if they reach 4′9″. One detail people miss is the rear-seat language: every stage says “in the rear seat if available,” a codified placement preference rather than a hard age cutoff. The driver is on the hook for any child under 16, and a violation carries a $50 fine.
Common questions
When can a child stop using a booster in Tennessee?
At age 9, or earlier if a child age 4–8 reaches 4′9″ (57″). The booster requirement covers ages 4 through 8 who are shorter than 4′9″.
Does Tennessee require rear-facing car seats by age?
Yes. A child under 1, or any child weighing 20 lb or less, must ride rear-facing. Unlike states that leave orientation to the manufacturer, this is Tennessee law.
Do children have to ride in the back seat in Tennessee?
The statute requires each restraint stage to be used in the rear seat “if available.” It is a codified placement preference rather than a strict under-a-set-age rear-seat rule.
What is the fine for a car-seat violation in Tennessee?
The driver is responsible for children under 16 and can be fined $50 for a violation. Some courts waive the fine if you show proof of obtaining a proper restraint.
Not legal advicePlainStatute provides plain-language summaries of public law for general information only. This is not legal advice. Statutes change; always confirm current requirements with the official source linked above before acting.