When you buy comprehensive car insurance in Australia, you choose between agreed value and market value cover. The choice affects how much you receive if your car is written off, and the premium you pay. Here is how each works and when each makes sense.
With market value cover, your insurer determines the value of your vehicle at the time of the loss. They calculate what a comparable vehicle would sell for on the open market on the day of the accident or theft. If your car is written off, you receive that assessed market value, minus your excess.
The risk with market value is uncertainty. You do not know exactly what your insurer will value your car at until you make a claim. In a falling used car market, the assessed value can be lower than you expected. In a rising market, it can be higher. You are exposed to the insurer's valuation methodology, which uses databases such as Glass's Guide or Red Book and applies local adjustments.
Market value premiums are typically 5 to 15% lower than agreed value premiums for the same vehicle, because the insurer carries less certainty risk.
With agreed value cover, you and your insurer agree on the value of the vehicle when you take out or renew the policy. If the car is written off, you receive that agreed amount (minus excess), regardless of what the market is doing at the time of the claim.
The agreed value is set at policy inception, typically within a range the insurer offers based on the vehicle's age, model, and condition. You can sometimes negotiate upward within that range, but most insurers set a maximum.
You know exactly what you will receive. The trade-off is a higher premium and the requirement to review and update the agreed value at each renewal. An agreed value that made sense three years ago may be above or below current market value today.
Consider a 2020 Toyota RAV4 with 60,000 kilometres. Current market value in mid-2025 is approximately $32,000.
Market value policy: You pay a premium of around $1,100 per year. If the car is written off and the insurer assesses market value at $30,500 (which can happen if comps in your area are lower), you receive $30,500 minus your $800 excess = $29,700.
Agreed value policy at $33,000: You pay a premium of around $1,230 per year (roughly $130 more). If the car is written off, you receive $33,000 minus your $800 excess = $32,200, regardless of what the market is doing.
The agreed value option costs $130 more per year and delivers a guaranteed $2,500 more on a total loss claim compared to the lower market assessment scenario. Whether that is good value depends on how often total-loss outcomes occur (relatively rarely) and how much the premium difference accumulates over years without a claim.
Agreed value makes clear sense in specific situations. If your car is a modified vehicle, a classic, or has been upgraded in ways that standard market databases do not capture, market value assessments will likely undervalue it. Agreed value lets you specify an amount that reflects the car's actual condition and modifications.
If you financed your vehicle and have a loan, agreed value gives you certainty that the payout will cover your outstanding debt. Market value assessments can sometimes fall below the remaining loan balance, leaving you with negative equity after a write-off.
New vehicles in their first two to three years depreciate sharply. A new car bought for $55,000 may be assessed at $42,000 market value eighteen months later. If you set an agreed value of $50,000 at purchase and keep it for two years, you are effectively insured for above market value for most of that period, which is advantageous if you write it off.
For older vehicles with lower value, the difference between agreed and market value assessments narrows. A 2012 Mazda3 worth around $10,000 market value is unlikely to see a contested assessment of more than $500 to $1,000 either way. Paying a higher premium for agreed value on a low-value vehicle often does not justify the cost.
If you have no finance on the vehicle and the car is worth under $15,000, market value cover is generally adequate. The uncertainty exposure is small in dollar terms and the premium saving is real.
Both agreed and market value policies can drift out of alignment with reality at renewal. An agreed value that is too high for the vehicle's current condition can make your policy cost more than necessary. An agreed value that is too low leaves you underinsured on a total loss. Review the agreed amount at each renewal and cross-check it against current market listings for your make, model, year, and mileage.
Compare comprehensive car insurance policies with agreed and market value options.
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