Car insurance in Australia, explained

Compulsory third party insurance is attached to a registered vehicle, not to a person, and it pays for personal injury arising from the use of that vehicle. It is bundled into your registration payment and you cannot register a vehicle without it.

In New South Wales it is still commonly called a green slip. In Victoria the equivalent is the transport accident charge inside your registration, which funds the Transport Accident Commission. In Queensland and South Australia you choose a licensed CTP insurer at registration, with premiums set within a regulated band. Western Australia's motor injury insurance is provided through the Insurance Commission of Western Australia. Tasmania's scheme is run by the Motor Accidents Insurance Board.

The schemes are not equivalent in what they pay. Victoria and Tasmania operate no-fault schemes, meaning treatment and income support are available regardless of who caused the crash. Other schemes provide defined benefits for a period regardless of fault while reserving larger damages for people who were not at fault. This is a genuine difference in outcome, not just terminology.

Because CTP is regulated at state level, moving interstate means changing schemes as well as changing plates. Registration transfer is the mechanism, and it happens automatically when you re-register — but the benefits available to you if you are injured change on the same day.

Where a vehicle is unregistered or uninsured, or where the vehicle cannot be identified after a hit and run, each scheme has a nominal defendant or equivalent arrangement so injured people are not left without recourse. These come with strict conditions about reporting the crash to police and about the effort made to identify the vehicle.

What CTP never does, in any state, is pay for repairs. Not to your car, not to the other car, not to the fence you hit. Every dollar of property damage sits outside the scheme.

Third party property damage insurance covers your legal liability for damage you cause to other people's property with your vehicle. It does nothing for your own car. It is the cheapest motor policy on the market and it covers the risk with the largest possible price tag, which is why it is the wrong thing to skip when money is tight.

Most third party property policies also include a limited benefit for damage to your own vehicle caused by an uninsured driver, capped at a modest amount. That cap is often close to the entire value of an older car, which is what makes this product genuinely viable rather than merely cheap.

Third party fire and theft adds cover for your own vehicle against exactly those two things and nothing else. It sits in a narrow band of usefulness: worth considering where the car has enough value to be worth stealing, in an area where theft is a real risk, but not enough value to justify comprehensive.

Comprehensive covers accidental damage to your own vehicle — including single-vehicle crashes where nobody else is involved — plus fire, theft, storm, hail and flood, plus the same third party property liability. It is the only product that pays when the crash was your fault and your own car is wrecked.

Comprehensive policies vary far more than the name suggests. Windscreen cover, hire car after an accident, hire car after theft, new-for-old replacement in the first years, personal effects, emergency accommodation and towing are all sometimes included, sometimes optional and sometimes absent. Two policies with the same label and a fifty-dollar price difference can differ by thousands in what they pay.

If your car is financed, the lender will normally require comprehensive cover as a condition of the loan. Read that requirement before shopping, because letting comprehensive lapse on a financed vehicle can be a default under the credit contract as well as leaving you exposed.

The excess is the amount you contribute to a claim. It is deducted from the settlement or paid to the repairer, and it is the single biggest lever on your premium.

The basic excess applies to almost every claim. On top of it, insurers add specific excesses that apply according to who was driving and in what circumstances: an age excess for drivers under a specified age, an inexperienced driver excess for anyone who has held a licence for less than a stated period, and an unlisted or undeclared driver excess where the driver was not named on the policy.

These stack. A claim involving a nineteen-year-old who is not listed on the policy can attract the basic excess, the age excess and the unlisted driver excess together, and the total can exceed the value of the repair. Working this out after the crash is the wrong time.

There are usually claims where no excess applies or a reduced one does — windscreen-only claims under a policy with windscreen cover, and claims where the insurer has recovered its costs from an identified at-fault third party. Ask specifically about the second one, because insurers vary on whether the excess is waived up front or refunded later.

Voluntarily increasing your basic excess reduces the premium, sometimes substantially. The test is whether you could actually produce that amount at short notice, because the excess falls due when the car is already off the road.

Excess is not the same as a deduction for depreciation or for unrepaired prior damage, both of which can also reduce a settlement. Read the settlement calculation in the product disclosure statement rather than assuming the excess is the only reduction.

Comprehensive policies insure your vehicle either for an agreed value — a figure fixed when the policy is written, sometimes within a range you choose — or for market value, assessed at the time of the loss.

Agreed value gives certainty. You know exactly what you receive if the car is written off, and it does not fall as the car depreciates through the policy year. It usually costs more, and choosing a high agreed value raises the premium further, so the certainty is something you are buying rather than something you are given.

Market value is what the vehicle was worth immediately before the loss, based on comparable sales and the vehicle's condition and kilometres. It is normally cheaper and is perfectly adequate for a common car with a liquid second-hand market. It is a poor fit for anything unusual, heavily modified, or recently bought at a price above the typical market.

On a total loss the insurer pays the sum insured or market value less the excess and any unpaid premium instalments for the year, and normally takes the salvage. Where the vehicle is financed, the settlement generally goes to the financier first and you receive whatever is left, which can be nothing if the loan balance exceeds the car's value.

That gap is what gap insurance is sold to cover. It is worth considering only where the loan is genuinely likely to exceed the car's value for a meaningful period — a long loan term, a small deposit, a car that depreciates fast — and it is worth pricing separately from the dealer's offer.

A written-off vehicle is recorded on your state's written-off vehicles register. That record follows the vehicle identification number permanently, restricts re-registration, and is exactly what a pre-purchase check is looking for when you buy second hand.

Modifications, accessories and non-standard wheels are frequently excluded or capped unless declared and listed. Declaring them raises the premium slightly and prevents a fight later, which is a good trade.

Decide which product you need first, before looking at any price. Comprehensive, third party property, or third party fire and theft — the answer follows from your car's value, your savings, and whether the car is financed.

Get at least three quotes on identical terms: same excess, same value basis, same listed drivers, same annual kilometres, same parking arrangement. Comparing quotes with different excesses is comparing nothing.

Read the product disclosure statement, or at least the exclusions and the claims settlement sections. The PDS is the contract. Marketing pages, comparison summaries and call-centre reassurance are not, and only the PDS decides a disputed claim.

Check the target market determination, which insurers must publish, stating who the product is designed for. If you do not match the described market, that is a signal the product may not do what you need.

Answer the underwriting questions accurately — who drives the car, where it is parked overnight, what it is used for, annual kilometres, and any modifications. Understating these lowers the premium and gives the insurer grounds to reduce a claim later. Business or ride-share use in particular is excluded from most ordinary policies.

Treat add-ons individually. Windscreen cover and hire car after an accident are commonly worth their cost for people who cannot go without a car. Extended warranties, tyre and rim cover, loan protection and consumer credit insurance sold alongside a car have historically offered poor value, which is why they have attracted regulatory attention.

Check the payment frequency. Paying monthly is convenient and usually costs more over the year, and missing an instalment can suspend cover at exactly the wrong moment.

Re-shop at every renewal. Loyalty is priced negatively in this market, and the renewal notice legally has to show last year's premium alongside this year's so the increase is visible.

A no-claim discount is a reduction in premium built up over consecutive claim-free years. It is not a bonus paid to you and it is not portable in any guaranteed way between insurers, though most will recognise a competitor's rating if you can evidence it.

An at-fault claim normally reduces the discount, and the reduction persists for several renewals, so the true cost of a claim is the settlement you receive minus the excess minus the extra premium over the following years. For small repairs this arithmetic often favours paying directly.

Protected no-claim discount is an add-on that preserves your rating through a limited number of claims. It is worth the money only if the premium loading it prevents exceeds what it costs, which is a calculation you can do from your own renewal notice.

When you claim, expect an assessment, a decision between repair and total loss, and a nominated repairer. Whether you can choose your own repairer is a policy feature worth checking before you buy, not after the crash.

If a claim is refused or reduced, ask for the reasons in writing and for the specific policy clause relied on. Then use the insurer's internal dispute resolution process, which is compulsory and time-limited. General insurers subscribing to the General Insurance Code of Practice also commit to standards on claims handling and on supporting customers experiencing vulnerability.

If the internal process does not resolve it, take the dispute to the Australian Financial Complaints Authority. It is free, independent, and its determinations bind the insurer if you accept them. There are time limits, generally running from the insurer's final internal response.

Non-disclosure is the most common ground for refusal, and it is also the most avoidable. Update your insurer when a listed driver changes, when the car moves to a different address, when you start using it for work, and when you modify it.