When comprehensive car insurance is worth paying for — and when it may not be
For many drivers, the reminder that it’s time to renew car insurance lands in the inbox with all the excitement of a utility bill. Yet it is one of those routine tasks where a bit of attention can make a real difference to both your budget and your peace of mind.
In Australia, drivers generally choose between three types of optional car insurance: third party property damage; third party property damage, fire and theft; and comprehensive. On top of that, there is compulsory third party insurance (CTP), which covers injuries you have caused to people, but does not cover damage to your car, anyone else’s car, or property. CTP is mandatory, but how it operates varies by jurisdiction — in NSW it is known as a green slip, while in some states it is included as part of vehicle registration.
The question many people face at renewal time is whether comprehensive insurance is worth the extra cost. It is often treated as the default option, but experts say it may not be the best fit for every car or every household budget — particularly at a time when premiums have been rising.
Why the decision has become harder: rising premiums
According to the Insurance Council of Australia, comprehensive car insurance costs increased by an average of 42 per cent between 2019 and 2024. Consumer group Choice also points to continued upward pressure, with its insurance expert Jodi Bird saying car insurance costs grew by about another five per cent last year.
When prices climb this quickly, the trade-offs become more visible. Paying for the highest level of cover may feel reassuring, but it can also be easy to pay for more protection than you realistically need — especially as the value of many used cars declines over time. Bird warns that it can be “fairly easy to over-insure your car”, particularly because the cost of used cars comes down every year.
That doesn’t mean comprehensive insurance is a bad product. It means the value of comprehensive cover depends on your circumstances: the current value of your car, how much you drive, what you could afford if something went wrong, and what the policy actually covers.
The three optional policy types, explained
While insurers’ product details vary, the main optional car insurance categories are widely understood and described on the government’s MoneySmart website. Bird describes comprehensive as the highest level of cover, while third party property damage “just covers damage to another person’s car”.
He offers a simple example: if you are driving an older, low-value car and you crash into an expensive vehicle, third party property damage insurance should cover the other driver’s car — but not yours. In his words, if you are in a “20-year-old Hyundai” and crash into someone’s Porsche, the policy should pay for the Porsche but not the Hyundai.
Between third party property damage and comprehensive sits third party property damage, fire and theft. As the name suggests, it is a step up from basic third party property damage, but it is not the same as comprehensive. For many drivers, the decision is about how much risk they are willing (and able) to carry themselves if their own car is damaged, stolen or otherwise becomes unusable.
Third party property damage: Covers damage you cause to other people’s vehicles and property, but not damage to your own car.
Third party property damage, fire and theft: Adds protection for specific events (fire and theft) compared with basic third party property damage, but still does not offer the broad cover of comprehensive.
Comprehensive: The highest level of cover among the optional types, typically designed to cover a wider range of scenarios, including damage to your own vehicle as well as others, subject to the policy’s terms, conditions and exclusions.
Bird notes that one positive for consumers is that car insurance policies often have a lot in common compared with other insurance types. Even so, the differences that do exist — such as exclusions, add-ons, and service standards — can matter a great deal at claim time.
Start with the car: value, age and what you can afford to lose
Fei Huang, an associate professor in the School of Risk and Actuarial Studies at the University of Sydney Business School, says the type of policy that makes the most sense depends on your car. She says she often hears that people choose comprehensive cover as the default, but it may not be worth it for everyone.
Her rule of thumb is straightforward: if you have a very old, low-value vehicle, she would not recommend “going to comprehensive immediately”. That is because the premium you pay can become hard to justify relative to what the car is worth today — particularly if you are unlikely to be able to claim an amount that feels commensurate with years of higher premiums.
Both Huang and Bird suggest comparing the current value of your car with the cost of insurance. This comparison can guide you toward one of two practical outcomes: finding a cheaper comprehensive policy, or downgrading from comprehensive to a third-party option.
Bird frames it as a budgeting decision as much as an insurance decision. If you have a cheaper, older car, he says you may want to look for ways to save money on insurance so you can put funds aside for the next car. In other words, rather than paying a high premium to protect a low-value asset, some drivers may prefer to accept more risk and build savings.
Huang similarly recommends calculating what your car is worth today versus the cost of insurance. If your vehicle is high-value, she says comprehensive cover may be attractive for peace of mind — particularly if you could not afford unexpected repairs or a replacement.
How often you drive can shift the equation
When weighing up the cost of a policy, Huang says it is also important to consider how much you use your car. While the article’s experts do not prescribe a single formula, the principle is intuitive: the more you are on the road, the more exposure you may have to incidents that could lead to a claim, and the more valuable broad cover may feel.
For some households, the car is used daily for commuting, school runs and errands. For others, it is used sparingly. Thinking about your driving patterns can help you decide whether comprehensive cover is a must-have, or whether a lower level of cover is a reasonable compromise.
Premiums, excess and add-ons: the levers you can actually pull
Drivers often experience insurance pricing as something that simply “happens” to them each year. But Huang points to several ways people can adjust the cost of cover and make comprehensive insurance more affordable — or determine that it still does not stack up.
One option is to drop “unnecessary add-ons”, such as expensive roadside assistance or cover for personal belongings. Another is to choose a higher excess, which can reduce the premium.
Understanding the difference between premium and excess is essential. The premium is what you pay for the insurance — whether yearly, monthly or quarterly. The excess is what you pay out of pocket when you make a claim.
Changing the excess can alter the overall value proposition. A lower premium might look appealing, but it can come with a higher excess that you would need to be able to pay if an accident occurs. Conversely, a lower excess can mean higher ongoing costs. The right balance depends on what you could comfortably cover at short notice.
Comprehensive insurance doesn’t cover everything
One of the most common misconceptions about comprehensive cover is that it is “complete” in the everyday sense of the word. Huang cautions that comprehensive cover “doesn’t necessarily cover everything”. Policies often exclude wear and tear and mechanical breakdowns, she says.
That is why reading the limitations and exclusions matters. Two policies can both be labelled “comprehensive” and still differ in what they will and won’t pay for, and under what circumstances. MoneySmart recommends comparing the exclusions and inclusions of different policies.
Examples of areas that may vary between policies include whether they cover mechanical failure, storm damage or vandalism (intentional damage). On the other hand, some policies may include benefits such as free roadside assistance, free towing and car hire.
The takeaway is not that one set of inclusions is always better. It is that you should check whether the benefits you are paying for match the risks you are trying to manage — and whether the exclusions would leave you exposed in ways you did not expect.
Service quality matters — but it can be hard to judge
Price is only one part of the insurance decision. Drivers may also want to factor in the standard of service an insurer provides when something goes wrong. The challenge is that service quality can be difficult to assess until you have to make a claim.
Huang recommends checking the policy for details, reading reviews, and asking about other people’s experiences. While these steps cannot guarantee how a claim will go, they can help you understand whether an insurer has a reputation for handling claims smoothly or creating friction at stressful moments.
Be cautious about “loyalty” and no-claims bonuses
Many people stay with the same insurer year after year, partly because they believe loyalty will be rewarded. Bird warns drivers can become unduly attached to their “loyalty bonus” or “no claims bonus”. While these may once have translated into cheaper insurance, he says that today it can operate more like a “loyalty penalty”, because new customers often get a better deal.
This is where shopping around can have a direct payoff. Both Bird and Huang advocate actively comparing providers and switching if the numbers make sense. Huang says changing providers can potentially save you several hundred dollars.
A practical way to decide if comprehensive is worth it
There is no single threshold that makes comprehensive cover “worth it” for everyone, but the experts’ advice points to a clear decision pathway built around today’s value, today’s costs, and your ability to absorb a loss.
Step 1: Identify your car’s current value. Don’t rely on what you paid years ago; focus on what it is worth today.
Step 2: Compare that value with the cost of comprehensive cover. If the premium feels high relative to the car’s value, consider whether you are over-insuring.
Step 3: Consider affordability if something goes wrong. If you have a high-value vehicle and could not afford unexpected repairs or replacement, comprehensive may provide peace of mind.
Step 4: Think about how much you drive. Your usage can influence how you weigh risk and the value of broader cover.
Step 5: Adjust the levers. Review add-ons, consider a different excess, and see if a cheaper comprehensive option exists before downgrading.
Step 6: Read the fine print. Comprehensive policies can exclude wear and tear and mechanical breakdowns, and may differ on issues like storm damage or vandalism.
Step 7: Shop around. Compare premiums, inclusions and exclusions across insurers, and don’t assume loyalty will be rewarded.
The bottom line
Comprehensive car insurance can be a sensible choice, particularly for high-value vehicles or for drivers who want protection from costs they could not otherwise manage. But with comprehensive premiums rising substantially in recent years, it is also a product that deserves a fresh look at every renewal.
For older, low-value cars, comprehensive insurance may not automatically represent good value — and drivers may be able to reduce costs by downgrading cover, adjusting the excess, or removing add-ons. Whatever you choose, the most important step is to compare policies carefully, check inclusions and exclusions, and be willing to switch providers if a better deal is available.
This is general information only. You should consider obtaining independent professional advice in relation to your particular circumstances.