Maryland’s booster seat requirements apply to every child under eight years old who is not yet 4 feet 9 inches tall. Until a child clears that height or that birthday, state law requires them to ride in a child safety seat that meets federal safety standards, installed according to both the vehicle and car seat manufacturer instructions.1Maryland General Assembly. Maryland Code Transportation 22-412.2 Riding without one is a primary offense, so an officer can pull you over for that reason alone.
Who Needs a Booster Seat
Maryland groups rear-facing seats, forward-facing harnessed seats, and booster seats together under one term: “child safety seat.” The statutory rule is simple. If your child is younger than eight and shorter than 4 feet 9 inches, they need one.1Maryland General Assembly. Maryland Code Transportation 22-412.2
The height threshold does real work in the law. A tall six-year-old who already measures 4 feet 9 inches can legally use the vehicle’s seat belt. A small eight-year-old technically falls outside the mandate but will almost certainly not get a proper belt fit without a booster, which is why safety guidance points to fit rather than age.
Maryland does not set a minimum weight for the booster requirement itself, but every booster carries a manufacturer-specified weight range printed on the seat or its label. A child who is too light or too heavy for the seat’s rating is not properly protected by it. Check the label rather than assuming.
High-Back Versus Backless Boosters
Both types of booster are legal, and both raise a child so the adult seat belt sits in the right places. They do not perform the same way in a crash.
Research published in Injury Prevention found that high-back boosters reduced injury risk by roughly 70% in side-impact crashes compared with a seat belt alone, while backless boosters did not show a statistically significant improvement in those same crashes. The high-back shell contains the child’s upper body and keeps the shoulder belt positioned on the collarbone, limiting how far the head and torso travel during a side impact.2PMC (PubMed Central). Effectiveness of High Back and Backless Belt-Positioning Booster Seats in Side Impact Crashes
If your rear seat headrests already reach above your child’s ears, a backless booster gives reasonable head support. Without that coverage, the high-back model is safer.
When a Child Can Move to a Seat Belt
Hitting eight years old or 4 feet 9 inches does not guarantee a good belt fit. A booster exists to raise the child so the adult belt lands correctly, and children who barely meet the legal threshold often still fail the fit test.
Before your child moves out of the booster, check all of the following:
- They can sit all the way back against the vehicle seat, with knees bending naturally at the seat edge.
- The lap belt rests flat across the upper thighs, not riding up onto the stomach.
- The shoulder belt crosses the chest and collarbone without cutting into the neck or sliding off the shoulder.3NHTSA. Car Seat Recommendations for Children
If any part fails, the booster stays. Belt geometry also varies between vehicles, so a child who passes in your SUV may fail in a sedan with a differently angled rear seat. Check each vehicle separately.
What the Law Requires After the Booster
The booster mandate ends at eight or 4 feet 9 inches, but Maryland’s child passenger safety law does not. Every child under sixteen must be secured in either a child safety seat or a seat belt.1Maryland General Assembly. Maryland Code Transportation 22-412.2 An unbuckled twelve-year-old still results in a ticket for the driver.
NHTSA also recommends keeping children in the back seat at least through age twelve, whether or not they have outgrown a booster. The back seat puts the most distance between a child and the forces of a frontal crash or a deploying passenger-side airbag.3NHTSA. Car Seat Recommendations for Children
Exceptions
Maryland recognizes a narrow set of situations where the child safety seat requirement does not apply.
- A physician licensed in the state where the vehicle is registered can certify in writing that a child safety seat is impractical because of the child’s weight, height, physical condition, or another medical reason. The certification must explain why the seat cannot be used.1Maryland General Assembly. Maryland Code Transportation 22-412.2
- The statutory definition of “motor vehicle” excludes Class L (historic) vehicles, which typically lack rear seat belts.4Maryland General Assembly. Maryland Code Transportation 22-412.3
- The requirement applies to vehicles required to have seat belts under federal safety standards. Certain older and specialized commercial vehicles that were never required to have rear belts are not covered, and Maryland does not require retrofitting.4Maryland General Assembly. Maryland Code Transportation 22-412.3
If your vehicle has working seat belts, the child safety seat requirement applies. There is no exception for inconvenience or short trips.
Taxis and Rideshares
Traditional taxis are exempt from Maryland’s child restraint law. Rideshare services such as Uber and Lyft are not.5Maryland Department of Health. What Do Caregivers Need to Know about Maryland’s Child Passenger Safety Law? If you book a rideshare with a child under sixteen, the full law applies, including the booster requirement for children under eight. In practice, that means bringing your own booster and installing it before the ride.
Even in an exempt taxi, Maryland’s Kids in Safety Seats program recommends using a booster anyway. Crash physics do not change based on who owns the vehicle.
Fines and Enforcement
A child restraint violation is a primary offense in Maryland.6MIEMSS. Talking Points About Maryland’s Updated CPS Law The statutory fine is $50, and with court costs the total comes to $83.7Maryland Courts. Traffic Fine Schedule If more than one child in the vehicle is improperly restrained, each child counts as a separate violation.
The fine can be waived. If you did not own a car seat at the time of the stop, purchased one before your court date, and bring proof of the purchase to your hearing, a judge can waive the fine entirely.1Maryland General Assembly. Maryland Code Transportation 22-412.2
Child restraint violations carry zero points on your Maryland driving record.7Maryland Courts. Traffic Fine Schedule The violation does still appear as a traffic offense, and Maryland insurers are permitted to consider traffic violations from the past three years when setting premiums.8Maryland Insurance Administration. Automobile Insurance Rates Whether a zero-point ticket actually triggers a rate change varies by insurer.
Free Help from Kids in Safety Seats
Maryland runs the Kids in Safety Seats (KISS) program through the Department of Health, and every service is free. KISS holds in-person car seat checks at events around the state, offers virtual appointments over Zoom for installation help, and runs a reduced-cost purchase program for families who qualify financially.9Maryland Department of Health. About Kids in Safety Seats (KISS) The helpline is 800-370-SEAT (7328), and appointments can also be arranged through mdh.kiss@maryland.gov.10Maryland Department of Health. Kids In Safety Seats (KISS)!
National data consistently shows that a large share of car seats are misused, with common problems including loose straps, low chest clips, and incorrect seat angles. A certified technician can spot and fix those in minutes, which matters as much for boosters and belt fit as for infant seats.