Car Seat Rules by State in Australia

Car seat rules in Australia are designed to keep children safe, and while the core rules are similar across states, there are small differences in wording and enforcement.

This guide gives a high‑level overview and helps you know what to check in your state.

What parents usually get wrong

Assuming rules are identical everywhere. Most are similar, but details can vary.
Confusing age and size requirements. Both matter.
Not checking the seat instructions. You must follow both the law and the manufacturer’s guidance.

Key things to consider

Age and size. Choose a seat based on your child’s size as well as age.
Rear‑facing recommendations. Many safety bodies recommend rear‑facing as long as possible within limits.
Installation. Correct fitting is essential. Small errors can reduce safety.

Australian standards and safety notes

Car seats sold in Australia should comply with the Australian Standard (AS/NZS 1754). Always use the correct tethering and routing as shown in the manual.

If you’re unsure, book a fitting check with an authorised restraint fitting station.

State and territory overview

The core rules are consistent, but check your local authority for details and exemptions.

New South Wales: Children under 7 must use an approved restraint. Rear‑facing is required under 6 months, and booster seats are used from around age 4 until 7. Front‑seat rules apply for under‑4s and 4–7s.
Victoria: Similar age‑based rules and approved restraint requirements, with rear‑facing required under 6 months and booster use from around 4 to 7.
Queensland: Similar requirements with approved restraints and age‑based stages; rear‑facing under 6 months and boosters from around 4 to 7.
South Australia: Similar staged requirements for approved restraints, with rear‑facing for infants and booster use until 7.
Western Australia: Similar staged requirements for approved restraints; rear‑facing for infants and boosters for 4–7.
Tasmania: Similar staged requirements with approved restraints and booster use until 7.
Australian Capital Territory: Similar staged requirements; approved restraints and booster use until 7.
Northern Territory: Similar staged requirements; approved restraints and booster use until 7.

Age‑based guidance

Newborn

Use a rear‑facing seat that fits your baby’s size and weight. Ensure the harness is snug and correctly positioned.

6 months and older

Many children stay rear‑facing for longer than parents expect. Keep rear‑facing until you reach the seat’s limits.

Toddler

Transition to forward‑facing only when your child exceeds the rear‑facing limits. Then follow the booster guidance for your state.

Budget expectations

A compliant, correctly fitted car seat is the priority. Features are secondary to fit and correct use.

When to worry / when not to

If you’re unsure about fit or rules, get a professional fitting check. It’s a quick way to remove doubt.

Conclusion

Rules may vary slightly by state, but the goal is the same: the right seat, correctly installed, for your child’s size and stage.

For more guidance, see: