CTP and car insurance in Australia: compulsory vs optional cover explained
Two separate insurance layers for your car
Owning and driving a car in Australia involves two completely separate types of insurance:
- CTP (Compulsory Third Party) — legally required
- Voluntary vehicle insurance — your choice
Understanding the difference prevents gaps in cover that could leave you personally liable for large costs.
CTP (Compulsory Third Party) — the Green Slip
What CTP covers:
CTP insures your legal liability for personal injury — compensation for people injured or killed in an accident where your vehicle was at fault. CTP does not cover vehicle damage (yours or anyone else’s).
It is compulsory:
CTP is a prerequisite for vehicle registration (rego) in every Australian state and territory. You cannot legally register a vehicle without valid CTP cover.
How to obtain CTP:
- NSW: Called the “Green Slip” — purchased separately from approved private insurers (NRMA, Allianz, QBE, etc.). Compare prices at greenslipcalculator.com.au.
- VIC, QLD, SA: CTP is included in the rego fee — no separate purchase needed.
- WA: Administered through the Insurance Commission of Western Australia.
CTP cost (NSW): Approximately $300–$800 per year, depending on vehicle type, age of vehicle and driver history.
Voluntary vehicle insurance — three tiers
Comprehensive cover
- Covers damage to your vehicle and third party vehicles/property.
- Includes: accidents (at-fault and not-at-fault), theft, fire, natural events, vandalism.
- Recommended for newer vehicles or financed vehicles.
Third Party Property cover
- Covers damage to other people’s vehicles and property if you are at fault.
- Does not cover your own vehicle.
- Suitable for older, lower-value vehicles where you accept the risk to your own car.
Third Party Fire and Theft
- Third Party Property cover plus cover for your own vehicle in the event of fire or theft.
Approximate annual costs
| Cover type | Approximate annual cost |
|---|---|
| CTP (NSW) | $300–$800 |
| Third Party Property | $300–$600 |
| Comprehensive | $800–$2,000+ |
Costs vary significantly based on: driver age, accident history, vehicle make/model, where it is garaged, and the insurer.
Key policy terms to understand
- Excess: The amount you pay out of pocket before the insurer covers the rest. A higher excess lowers your premium but means more cost at claim time.
- Agreed value vs. market value: Agreed value fixes the payout in your contract; market value pays the vehicle’s current market value at the time of the claim (often lower for older cars).
- Named drivers only: Some policies only cover named drivers — others driving the car may invalidate the claim.
- At-fault vs. not-at-fault: When an accident is not your fault, you may be able to claim from the at-fault driver’s insurer rather than your own.
Comparing car insurance
- Compare the Market (comparethemarket.com.au)
- iSelect
- Canstar
Or contact insurers directly: NRMA, RACV, RACQ, Allianz, Budget Direct, Youi, AAMI.