Indiana Car Seat Law: Age Rules, Exceptions, and Fines

Under Indiana car seat law, any child younger than eight must ride in a child restraint system installed and used according to the seat manufacturer’s instructions, and any child from eight through fifteen must be secured by a seat belt or a child restraint system.¹² Breaking either rule is a Class D infraction with a base fine of up to $25, though a first-time offender who shows the court a proper car seat can have the fine waived in full.

What Indiana Requires by Age

The statute sorts children into two groups and treats them differently.

If your child is younger than eight, they must be in a child restraint system. The law does not spell out rear-facing versus forward-facing versus booster, and it does not set its own weight or height cutoffs. Instead, it points you to the manufacturer’s instructions for whatever seat you own.¹

Children eight through fifteen can ride in a seat belt instead of a dedicated car seat, so long as the belt actually works and is properly fastened.² You can keep an older child in a booster or harnessed seat if you want; the statute allows a child restraint system anywhere in this age range. At sixteen, the general adult seat belt law takes over.

For an eight-year-old on the smaller side, “properly fastened” matters. The lap portion should sit snug across the upper thighs, and the shoulder strap should cross the chest without cutting into the neck. If the belt doesn’t sit right, a booster solves the fit and keeps you in compliance.

Why the Car Seat’s Label Sets the Rule

Because Indiana ties compliance to the manufacturer’s specifications, the sticker on the side of your seat is effectively part of the law. If a seat is rated for 5 to 40 pounds rear-facing and you put a 45-pound child in it rear-facing, that’s a violation. The same goes for height limits, harness slot positions, and whether the seat requires a top tether or LATCH anchor.¹

One practical consequence: infants ride rear-facing. Virtually every car seat sold specifies rear-facing installation up to a certain height or weight, and Indiana makes that specification binding. There is no separate “rear-facing until age one” statute, but the manufacturer’s label gets you to the same place.

The practical takeaway is to actually read the manual that came with your seat rather than relying on a generic age chart. A convertible seat might allow rear-facing to 50 pounds; an infant carrier might top out at 35.

When a Lap-Only Belt Is Allowed

Some older vehicles have back seats with lap belts only. Indiana allows a narrow exception for this: a child weighing more than 40 pounds may ride secured by a lap-only belt if the vehicle has no lap-and-shoulder belts available in the back, or if every lap-and-shoulder position in the back is already being used by another child under sixteen.³ The exception doesn’t apply to the front passenger seat or the driver’s seat.

Medical Exception

If your child’s physical or medical condition makes a standard restraint impractical, you can qualify for an exception, but you need documentation. A physician, physician assistant, or advanced practice registered nurse must issue a certificate explaining why the child cannot be safely secured in a child restraint system.¹ You can show it to the officer at the stop or present it in court. Without the certificate, the exception doesn’t apply, no matter the condition.

Fines and the First-Time Waiver

Failing to properly restrain a child in either age group is a Class D infraction.¹² The base fine runs up to $25,⁴ though court costs and administrative fees usually push the total higher.

The more important rule is the first-offense waiver. If you have no prior child restraint violations and you either already own a proper car seat or acquire one within 30 days of the court’s order, the court must waive the entire monetary judgment, costs included. If you don’t have a seat when you appear, the court will give you 30 days to get one; comply, and you owe nothing. The waiver works only once. A second violation is paid in full with no dismissal available.

Going Beyond the Minimum

Indiana’s rules are a floor. The National Highway Traffic Safety Administration recommends keeping a child rear-facing until they hit the maximum height or weight on their rear-facing seat, which on many convertible seats extends well past age two or three.⁵ NHTSA also recommends a booster until the vehicle’s seat belt fits a child properly without help, typically somewhere between ages eight and twelve, and keeping children in the back seat through age twelve.

Airbags

Never place a rear-facing car seat in front of an active passenger airbag. The force of deployment can be fatal to a rear-facing infant. If a child must ride up front because the vehicle has no back seat, push the passenger seat all the way back and deactivate the airbag.⁵

Expiration Dates and Recalls

Car seats have expiration dates stamped on the shell, usually on the bottom. Materials degrade and older models may not match current crash-test standards. Because an expired seat is no longer being used according to the manufacturer’s instructions, using one puts you out of compliance with the Indiana statute as well as being less safe.

Register your seat with the manufacturer so you get direct notice of recalls, and check NHTSA’s recall database if you buy or inherit a used seat.⁵ A recalled seat that hasn’t been repaired or replaced falls into the same category as an expired one: it is no longer being used the way the manufacturer specifies.

1
Indiana General Assembly. Indiana Code 9-19-11-2 – Child Less Than Eight Years of Age, Child Restraint System
2
Indiana General Assembly. Indiana Code 9-19-11-3.6 – Safety Belt Standards, Child Between Eight and Sixteen
3
Indiana General Assembly. Indiana Code 9-19-11-3.7 – Exception, Child Over 40 Pounds, Lap Safety Belt
4
Indiana General Assembly. Indiana Code 34-28-5-4 – Infractions, Judgments
5
National Highway Traffic Safety Administration. Car Seats and Booster Seats