The Arizona seat belt law requires every front-seat occupant of a passenger vehicle to wear a properly fastened seat belt while the vehicle is moving, and it makes the driver responsible for restraining every passenger under 16 no matter where they sit. The fine is $10, and an officer cannot pull you over for a seat belt violation alone. The real cost of not buckling up shows up somewhere else entirely: a personal injury lawsuit, where a jury can cut your damages if you were unrestrained when you were hurt.
Who Has to Wear a Seat Belt
Front-seat occupants must be belted whenever the vehicle is in motion. If your seat has a lap-and-shoulder belt, you use both. If only a lap belt is installed, the lap belt alone is enough.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
The driver is personally responsible for making sure every passenger under 16 is properly restrained, whether they are in the front or the back.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty Back-seat passengers 16 and older have no legal obligation to buckle up under Arizona law. That’s an unusually wide gap compared to most other states, and it surprises people.
Child Restraint Rules
Children ride under a separate, stricter statute:
- Under age 5: the child must ride in a federally approved child restraint system, with no exception for seating position.2Arizona Legislature. Arizona Code 28-907 – Child Restraint System; Civil Penalty; Exemptions; Notice
- Ages 5 through 7 and shorter than 4 feet 9 inches: still required to use a child restraint system, which includes booster seats. Once the child turns 8 or reaches 4’9″, whichever comes first, a regular seat belt is allowed.2Arizona Legislature. Arizona Code 28-907 – Child Restraint System; Civil Penalty; Exemptions; Notice
Any restraint used has to meet the federal design and performance standard at 49 CFR 571.213.2Arizona Legislature. Arizona Code 28-907 – Child Restraint System; Civil Penalty; Exemptions; Notice
One practical exemption comes up often: if you are transporting more children under 8 than you can physically fit child seats for, you must restrain as many as reasonably possible and the rest may ride with available belts. Narrower exemptions cover emergency medical transport, recreational vehicles, and vehicles originally manufactured without restraints.2Arizona Legislature. Arizona Code 28-907 – Child Restraint System; Civil Penalty; Exemptions; Notice
What the Fine Is
The adult seat belt fine is a maximum of $10 per unbuckled person, with no statutory court fees or surcharges added.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
Child restraint violations are heavier: $50 per violation. The court can waive that fine if you show you’ve since equipped the vehicle with a compliant child restraint.2Arizona Legislature. Arizona Code 28-907 – Child Restraint System; Civil Penalty; Exemptions; Notice
Can You Be Pulled Over for a Seat Belt Alone
No. Arizona treats adult seat belt violations as secondary offenses. An officer has to first have reasonable cause to believe you are committing a separate traffic violation before a seat belt issue can be added.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty So a citation for being unbuckled generally comes on top of a stop for something else, like speeding or a broken taillight.
Effect on Your License and Insurance
A seat belt violation under 28-909 stays off your driving record. No state agency may consider it in deciding whether to suspend or revoke your license, and courts are barred from sending records of the violation to the Arizona Department of Transportation.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
Insurers face the same restriction. A seat belt violation cannot be used to set your rates, decide whether you are insurable, or justify canceling or refusing to renew your policy.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
Who Is Exempt
Three groups fall outside the adult seat belt requirement:
- Children covered by section 28-907, who are governed by the child restraint rules instead.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
- People with a written statement from a physician or registered nurse practitioner that they cannot wear a seat belt for medical or psychological reasons.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
- U.S. Postal Service letter carriers performing their delivery duties.1Arizona Legislature. Arizona Code 28-909 – Vehicle Restraints Required; Exceptions; Civil Penalty
Why Not Wearing a Seat Belt Can Cost You in a Lawsuit
The $10 fine is not the number to worry about. Arizona allows defendants in personal injury cases to argue that a plaintiff’s failure to wear a seat belt contributed to the injuries. In Law v. Superior Court, the Arizona Supreme Court held that a jury may reduce a plaintiff’s damages for seat belt non-use under the state’s comparative fault system. The defendant has to show the plaintiff was old enough to know better, that going unbelted was unreasonable, and that it actually caused or worsened the injuries.3Matthiesen, Wickert & Lehrer, S.C. Seat Belt Defense in All 50 States
Practically: if another driver causes a crash and your injuries were worse because you were unrestrained, the at-fault driver’s insurer will almost certainly raise that argument to knock a percentage off what they owe you. On a serious injury claim, that percentage can dwarf any traffic fine many times over.
Commercial Vehicle Drivers
Federal rules apply on top of state law if you drive a commercial motor vehicle. No driver may operate a commercial motor vehicle equipped with a seat belt assembly unless properly restrained, and passengers in property-carrying commercial vehicles must use any belts installed at their seats.4eCFR. Use of Seat Belts (49 CFR 392.16) Unlike Arizona’s secondary-enforcement rule, this one is enforced directly during roadside inspections and audits, and violations can affect a carrier’s safety rating.