Kansas Car Seat Laws (2026): Age, Weight & Penalty Rules

Kansas requires a child passenger safety restraint through age 3, a restraining system through age 7 unless the child exceeds 80 pounds or 4 feet 9 inches first, and a seat belt from age 8 to 13, with a $60 fine that is waived, for an (a)(1) or (a)(2) restraining-system conviction, on proof the driver purchased a compliant restraint, and no license points, as of 2026.

Jurisdiction scope: This page covers Kansas's statutory child passenger restraint requirements under K.S.A. § 8-1344, which applies to a driver who transports a child under 14 in a passenger car or an autocycle on a highway, and its penalty provision, K.S.A. § 8-1345. It does not cover other states' laws.

Kansas Car Seat Requirements at a Glance

Children Under 4: Restraining System Required

Kansas requires any child under 4 years old to ride in "an appropriate child passenger safety restraining system" that meets federal motor vehicle safety standard no. 213. The statute does not separately require rear-facing versus forward-facing seating within this stage, leaving that choice to the restraint's own instructions.

Ages 4 to 7: The Weight and Height Exit Conditions

K.S.A. 8-1344(a)(2) requires a restraining system for a child who is 4 years old but under 8 and who "weighs less than 80 pounds or is less than 4 feet 9 inches in height." Read on its own, that "or" means the restraining-system duty keeps applying as long as either condition is still true, so it takes both thresholds being exceeded, weighing 80 pounds or more and standing 4 feet 9 inches or taller, before subsection (a)(2) itself stops covering the child. The statute's own language calls for "an appropriate child passenger safety restraining system," not specifically a booster seat; a harnessed seat that still fits the child also satisfies this requirement.

In practice, a child usually does not have to wait for both thresholds. Subsection (a)(3) separately permits a seat belt for a child "eight years of age but under the age of 14 years or who weighs more than 80 pounds or is more than 4 feet 9 inches in height." Because (a)(3) applies on its own once any one of those conditions is met, a 4-to-7-year-old who crosses just the weight threshold or just the height threshold becomes independently eligible for a seat belt under (a)(3), even though (a)(2) alone would still describe that same child as within its restraining-system duty. The two subsections overlap rather than operate as sequential gates, which is why reaching either threshold moves a child out of the restraining-system requirement in practice.

When Kansas Law Allows a Seat Belt Alone

A child becomes eligible to ride with just a safety belt once any one of three conditions is met: turning 8 years old, weighing more than 80 pounds, or standing more than 4 feet 9 inches tall, whichever happens first. Unlike the entry condition in the prior stage, this exit condition is written as an "or": a single threshold being crossed is enough, the child does not need to meet all three.

The Lap-Belt-Only Exception

Kansas law addresses what happens when a seating position has only a lap belt and no shoulder belt: at that position, the restraining-system requirement in subsection (a)(2) does not apply, and the child is instead secured under subsection (a)(3), meaning the lap belt itself satisfies the law. This is a permitted exception built into the statute, not a prohibition on using a booster with a lap-belt-only position.

Enforcement: Primary Offense, Not Secondary

Neither K.S.A. 8-1344 nor K.S.A. 8-1345 carries a secondary-enforcement limitation, meaning nothing in the child-restraint statute itself restricts an officer from stopping and citing a driver for a restraint violation without another, independent reason for the stop. That is a separate matter from Kansas's adult seat belt statute, K.S.A. 8-2503, which does carry a secondary-enforcement limitation, but only for one specific group: under 8-2503(e), an officer may not stop a driver for a back-seat occupant's violation of 8-2503(a)(1) in the absence of another violation of law, and a citation for that back-seat violation cannot be issued without also citing the violation that caused the stop. That limitation, by its own terms, does not reach a front-seat occupant 18 or older or an occupant age 14 to 17 in any seat. A blanket claim that "Kansas enforces its seat belt law as secondary" does not accurately describe either statute.

Exemptions

K.S.A. 8-1344 itself only reaches a driver who transports a child under 14 in a "passenger car" (as defined in K.S.A. 8-1343a) or an "autocycle" (as defined in K.S.A. 8-1497), on a highway. If the number of children covered by the restraint requirement exceeds the number of available passenger securing locations, and every available location is already in use by a child, that is not a violation of the statute. As described above, a seating position with only a lap belt available lifts the restraining-system requirement for a child in that position, who is instead secured by the lap belt itself. Two further defenses live in the penalty statute rather than in 8-1344 itself: K.S.A. 8-1345(c) bars a conviction if the driver proves the child was actually 14 or older at the time of the alleged violation, and K.S.A. 8-1345(d) keeps evidence that a child was not properly restrained out of a civil action for purposes of comparative negligence or mitigation of damages.

Penalty for a Car Seat Violation in Kansas

A violation carries a $60 fine under K.S.A. 8-1345(a). Failing to properly restrain more than one child in the same vehicle at the same time is a single violation, not a separate fine for each child. The statute expressly treats this as something other than a moving traffic violation for purposes of K.S.A. 8-255, meaning no license points are assessed.

That $60 fine is not automatic, though. K.S.A. 8-1345(b) requires it to be waived if a driver convicted of violating K.S.A. 8-1344(a)(1) or (a)(2) provides proof to the court that they have since purchased or acquired the appropriate, approved child passenger safety restraining system, and the law enforcement officer issuing the citation is required to notify the driver of that waiver at the time of the stop.

Disclaimer: This article provides general legal information about Kansas's child passenger restraint law as of 2026. It is not legal advice. Statutes and enforcement practices change; verify the current text of K.S.A. § 8-1344 and § 8-1345 before relying on them, and consult a lawyer licensed in Kansas for advice about a specific situation.

Related reading: Kansas car seat laws hub, Kansas DUI laws, Kansas window tint laws, and hit and run laws.

Statutes cited reflect their in-force version as of 2026-09-16. Last updated: 2026-09-16.

Frequently Asked Questions

What is Kansas's car seat law?

K.S.A. 8-1344 requires a restraining system for children under 4, a restraining system for children 4 to 7 unless they exceed 80 pounds or 4 feet 9 inches, and permits a seat belt alone once a child turns 8, exceeds 80 pounds, or exceeds 4 feet 9 inches, whichever comes first.

Can a child in Kansas use a lap belt with a booster seat?

Kansas law does not prohibit this. If a seating position has only a lap belt, the restraining-system requirement is lifted for that position and the lap belt itself satisfies the law. Using a booster there as well is not barred by the statute.

What is the fine for a car seat violation in Kansas?

K.S.A. 8-1345(a) sets a $60 fine, but K.S.A. 8-1345(b) requires the court to waive it, for a driver convicted under K.S.A. 8-1344(a)(1) or (a)(2), if the driver proves they have since purchased or acquired the appropriate restraining system; the officer issuing the citation must tell the driver about that waiver. The waiver does not reach a conviction under 8-1344(a)(3), the 8-to-13 seat belt duty. It is not treated as a moving violation, so no license points are assessed, and restraining more than one child improperly counts as a single violation.

Is Kansas's car seat law primary or secondary enforcement?

Neither K.S.A. 8-1344 nor K.S.A. 8-1345 contains a secondary-enforcement limitation, so nothing in the child-restraint statute itself bars an officer from stopping a driver for that violation alone. Kansas's separate adult seat belt law, K.S.A. 8-2503(e), is secondary enforcement only for a back-seat occupant 18 or older; front-seat adults and everyone age 14 to 17 remain primary enforcement under that law.

Does Kansas require a booster seat specifically?

Not by name. The statute requires an appropriate child passenger safety restraining system for children 4 to 7 who weigh less than 80 pounds or are less than 4 feet 9 inches tall (both have to be exceeded for that subsection alone to stop applying, though a separate provision independently allows a seat belt once either threshold is crossed), and a booster is one way to meet that, but a fitting harnessed seat also satisfies it.