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Car seat laws in Massachusetts

What Massachusetts law requires at each stage, from rear-facing to the front seat, next to what NHTSA and the AAP recommend. Plus the fine and where to get a free car seat check.

Checked October 2026 · 8 sources · Not legal advice

Short answer

Massachusetts requires children under 8 to ride in a car seat or booster unless they are more than 57 inches tall. Children under 13 who have outgrown that requirement must wear a seat belt.

Sources: The 194th General Court of the Commonwealth of Massachusetts; The General Court of the Commonwealth of Massachusetts. Data as of October 2026.

What does Massachusetts car seat law require at each age?

The law sets the minimum. NHTSA and the AAP recommend keeping each stage until your child outgrows the seat, which usually means longer.

Massachusetts car seat law at each stage, beside NHTSA and AAP guidance
StageWhat Massachusetts law requiresNHTSA and AAP guidance

Rear-facing car seat

No state rule

Massachusetts law does not require rear-facing.

NHTSA and the AAP recommend keeping your child rear-facing as long as possible, until they reach the top height or weight limit allowed by the car seat's manufacturer. A child under age 1 should always ride rear-facing, and most convertible seats allow rear-facing for 2 years or more.

Forward-facing seat with a harness

No state rule

Massachusetts law has no separate harness stage. Children under 8 must ride in a federally approved child passenger restraint, either a car seat or a booster.

NHTSA and the AAP recommend using a forward-facing car seat with a harness and tether once your child outgrows the rear-facing limits, for as long as possible, up to the highest weight or height the seat's manufacturer allows.

Booster seat

Best practice goes further

A passenger under 8 must be secured in a child passenger restraint, fastened according to the manufacturer's instructions, unless the child is more than 57 inches tall.

NHTSA and the AAP recommend using a belt-positioning booster seat after your child outgrows the harnessed seat, until the vehicle seat belt fits properly, typically when they reach about 4 feet 9 inches tall and are 8 to 12 years old.

Seat belt

A passenger under 13 who is not required to use a child passenger restraint must wear a properly adjusted and fastened safety belt.

NHTSA and the AAP recommend moving to the seat belt alone only when it fits: the lap belt lies snugly across the upper thighs, not the stomach, and the shoulder belt crosses the middle of the chest and shoulder, not the neck or face. Children big enough for the belt alone should always use a lap and shoulder belt.

Back seat

No state rule

No Massachusetts law says where in the car a child must sit.

NHTSA and the AAP recommend keeping all children younger than 13 in the back seat.

The law: Mass. Gen. Laws ch. 90, § 7AA, in effect since 2008.

Sources: The 194th General Court of the Commonwealth of Massachusetts; The General Court of the Commonwealth of Massachusetts; Insurance Institute for Highway Safety; National Highway Traffic Safety Administration. Data as of October 2026.

What are the fines and exemptions in Massachusetts?

First offense

Up to $25

A driver who violates the law faces a fine of up to $25. The fine does not apply to a taxi driver whose cab has no child restraint. A violation is not counted as a moving violation for car-insurance surcharge purposes, and a citation can be contested.

Exemptions

The law does not apply to a child riding a school bus, a child in a vehicle made before July 1, 1966 that has no seat belts, or a child a physician certifies in writing as physically unable to use a conventional or special-needs restraint.

Questions about the law

This is general information, not legal advice. For how the law applies to you, ask Commonwealth of Massachusetts (Mass.gov).

The current text of the first two paragraphs comes from Acts of 2008, ch. 79, approved April 11, 2008. Town police pages put its effective date at July 10, 2008, but no state source confirmed that date. The statute's exception is 'more than 57 inches'; IIHS describes it as 'at least 57 inches', a small wording difference. Mass.gov returned HTTP 403 to automated fetches, so the agency page is linked but was not read and isn't used as a fact source. The office that publishes it is also unconfirmed.

Where can you get your car seat checked for free?

Certified child passenger safety technicians check car seats at inspection stations nationwide. NHTSA says they inspect seats free of charge in most cases and show you how to install and use the seat correctly, and some locations offer virtual inspections. Search NHTSA's locator by ZIP code or city (it can filter for Spanish-speaking technicians), or find a technician through Safe Kids Worldwide.

Find an inspection station How to get a free car seat

Sources: National Highway Traffic Safety Administration; American Academy of Pediatrics (HealthyChildren.org)

Where are the car seat inspection stations in Massachusetts?

NHTSA's locator lists 235 car seat inspection stations in Massachusetts, in 198 cities and towns. Boston has the most (5), then Amherst, Northampton, Swansea and Westport (3 each). NHTSA flags 14 of them as Spanish-speaking.

235

inspection stations in NHTSA's locator

NHTSA, October 2026

198

cities and towns with a station

NHTSA, October 2026

14

flagged as Spanish-speaking

NHTSA, October 2026

101

of 235 records updated since 2023

Newest: August 29, 2023

Cities with the most stations

  1. Boston5 stations
  2. Amherst3 stations
  3. Northampton3 stations
  4. Swansea3 stations
  5. Westport3 stations
  6. Andover2 stations
  7. Attleboro2 stations
  8. Auburn2 stations

Plus 190 more cities and towns. Search NHTSA's locator by ZIP code for the ones near you.

Spanish-speaking stations are listed in Attleboro, Boston, Brockton, Chelmsford, Dorchester, Everett, Haverhill and Holyoke, and 5 more places. Use the locator's Spanish-speaking filter to see them.

Search NHTSA's locator by ZIP

Source: National Highway Traffic Safety Administration. Data as of October 2026.

Choosing and getting a car seat

Infant vs convertible car seat: which to buy firstInfant vs convertible car seat, compared with AAP and NHTSA guidance: rear-facing limits, portability, when to switch, installation and free seat checks.How to get a free car seatWhere to get a free infant car seat in 2026: Medicaid plan extras, Safe Kids coalitions and 211, plus free installation checks and when a used seat isn't safe.

Questions about car seat laws in Massachusetts

When can a child face forward in a car seat in Massachusetts?

Massachusetts law does not require rear-facing. NHTSA and the AAP recommend keeping your child rear-facing as long as possible, until they reach the top height or weight limit allowed by the car seat's manufacturer. A child under age 1 should always ride rear-facing, and most convertible seats allow rear-facing for 2 years or more.

When can a child stop using a booster seat in Massachusetts?

A passenger under 8 must be secured in a child passenger restraint, fastened according to the manufacturer's instructions, unless the child is more than 57 inches tall. NHTSA and the AAP recommend going further: using a belt-positioning booster seat after your child outgrows the harnessed seat, until the vehicle seat belt fits properly, typically when they reach about 4 feet 9 inches tall and are 8 to 12 years old. The AAP says an adult seat belt fits when: the shoulder belt lies across the middle of the chest and shoulder, not the neck or throat; the lap belt is low and snug across the upper thighs, not the belly; and the child is tall enough to sit against the vehicle seat back with knees bent over the edge of the seat without slouching, and can stay that way for the whole trip. NHTSA uses the same lap-belt and shoulder-belt checks. The 5-step test, which California writes into law from January 1, 2027, asks: 1) Does the child sit all the way back against the seat? 2) Do the knees bend over the edge of the seat? 3) Does the shoulder belt snugly cross the center of the chest and shoulder, not the neck? 4) Is the lap belt as low as possible, touching the thighs? 5) Can the child stay seated like this for the whole trip?

How old does a child have to be to sit in the front seat in Massachusetts?

No Massachusetts law says where in the car a child must sit. NHTSA and the AAP recommend keeping all children younger than 13 in the back seat.

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

A driver who violates the law faces a fine of up to $25. The fine does not apply to a taxi driver whose cab has no child restraint. A violation is not counted as a moving violation for car-insurance surcharge purposes, and a citation can be contested.

Where can I get a car seat inspection in Massachusetts?

NHTSA's locator lists 235 car seat inspection stations in Massachusetts, in 198 cities and towns. Boston has the most (5), then Amherst, Northampton, Swansea and Westport (3 each). NHTSA flags 14 of them as Spanish-speaking. Certified technicians check seats for free in most cases. Search NHTSA's locator by ZIP code and call the station before you go.

More for parents in Massachusetts

Sources

  1. 1.Mass. Gen. Laws ch. 90, § 7AA, Child passenger restraints; fine; violation as evidence in civil action The 194th General Court of the Commonwealth of Massachusetts. Accessed October 14, 2026.
  2. 2.Acts of 2008, Chapter 79, An Act Relative to Child Passenger Safety The General Court of the Commonwealth of Massachusetts. Accessed October 14, 2026.
  3. 3.Seat belt and child seat laws (table dated October 2026) Insurance Institute for Highway Safety. Accessed October 14, 2026.
  4. 4.Car Seats and Booster Seats National Highway Traffic Safety Administration. Accessed October 14, 2026.
  5. 5.Car Seats: Information for Families (last updated 4/16/2026) American Academy of Pediatrics (HealthyChildren.org). Accessed October 14, 2026.
  6. 6.California Vehicle Code § 27363 (exemptions; current version and version operative January 1, 2027) California Legislative Information. Accessed October 14, 2026.
  7. 7.Car Seat Inspection (inspection station locator) National Highway Traffic Safety Administration. Accessed October 14, 2026.
  8. 8.Car Seat Inspection Locator API (CSSIStation) National Highway Traffic Safety Administration. Accessed October 16, 2026.

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