Third party car insurance in Australia

A plain-English guide to third party property car insurance in Australia — what it covers, what it doesn't, how it compares to CTP and comprehensive, and the situations it may suit.

Third party car insurance often gets dismissed as the bargain-basement option, but for the right car and driver, it can be a perfectly reasonable choice. Understanding exactly what it does — and doesn't — cover is the difference between an informed decision and a regret at claim time.

If you'd rather start with the broader basics, the car insurance hub covers all four types of car insurance side by side.

What is third party car insurance?

Third party property car insurance is an optional policy that covers damage your vehicle causes to other people's property — most often, their car. It generally doesn't cover damage to your own vehicle. There are usually three flavours people group under "third party":

• Third party property only — damage to other people's property.
• Third party fire and theft — third party property cover plus limited cover if your car is stolen or damaged by fire.
• CTP — compulsory third party. Covers injury to people, not vehicle damage. Required to register your car. The CTP / green slip page covers this in more depth.

When most people say "third party car insurance" they mean the first or second of these.

Key things to understand

• Damage to your own car usually isn't covered. If you write off your own car in a single-vehicle incident, a basic third party policy generally won't pay for it.
• It's not the same as CTP. CTP covers people; third party property covers vehicles and other property.
• Some policies include a limited 'uninsured motorist' extension. Worth a careful PDS read.
• Excess still applies. Even on a third party claim you'll typically pay an excess.
• Optional extras are limited. Hire car cover and choice of repairer features are more common on comprehensive policies.
• The PDS resolves edge cases — what counts as 'property', whether trailers are included, and how claims involving your own car interact with the policy.

How to compare third party policies

1. Decide between third party property only and fire and theft. The price gap is usually small and the cover difference is meaningful for cars stored on the street.
2. Get matched quotes — same vehicle, same drivers, same excess. Our car insurance quotes page lists what to keep constant.
3. Quote comprehensive too for the same situation. Sometimes comprehensive isn't much more expensive than you'd expect, and the cover difference is significant.
4. Compare excesses and limits on each third party policy — the per-claim limit on damage to other people's property can vary.
5. Read the PDS and TMD. Especially the exclusions section and any uninsured motorist clauses.

Our compare car insurance page covers the broader comparison framework.

Common mistakes to avoid

• Confusing third party property with CTP. They're different products solving different problems.
• Choosing third party purely on price for a car you couldn't afford to replace yourself.
• Assuming theft is covered. Standard third party property generally doesn't cover theft — third party fire and theft does, with limits.
• Skipping the comprehensive quote on the assumption it's much more expensive. Sometimes it isn't.
• Not reading the property damage limit. A claim against you involving an expensive vehicle can be larger than you'd expect.

What affects whether third party may suit you

• The value of your car. Lower-value cars tend to make third party an easier choice.
• Whether the car is financed. Lenders usually require comprehensive cover.
• Your ability to absorb a write-off yourself. If replacing the car would be difficult, comprehensive often makes more sense.
• Where the car is parked. Street parking in higher-theft areas may push toward at least third party fire and theft.
• Your driving environment. Single-vehicle incidents are more likely on rural roads, in winter conditions, or on high-traffic commutes.

For more on what shapes the price of any car insurance, see our car insurance cost page.