AUCN Data: Written-Off Rates Are Twice as High in Some States

Where a used car has lived matters — and AUCN's check data makes that concrete. The written-off rate in some states runs at roughly twice the rate of others.

If you are buying a car with interstate history, this is the most useful table you will see this week.

Written-off rates by state

Why the gap exists

The pattern tracks the things that actually total cars:

• Hailstorms — South Australia and parts of regional Queensland see severe, repeated hail events.
• Flooding — Queensland's wet seasons routinely write off entire car populations at once.
• Distance and environment — Western Australia's long, remote driving and harsher conditions lead to more structural write-offs.
• Fleet mix — mining, agriculture and regional work vehicles age differently to city cars.

A written-off record also does not stay in the state where it happened. Repaired write-offs are bought, moved and re-registered across borders all the time, and each state runs its own written-off vehicle register — see the VicRoads and Queensland processes as examples.

The same states also lead on overall risk

Combining every risk flag produces almost the same ranking, which tells you the state differences are not an artefact of one data point — they reflect genuinely different vehicle histories.

Write-off risk is highest in mid-age cars

That last line surprises most buyers: write-off history is not confined to old cars. A vehicle can be repaired and resold within a year or two of a hailstorm or flood, then reappear as an apparently clean late-model listing.

If you are buying an interstate car

1. Check before you pay, not after rego changes hands. A $2 PPSR search covers all states.
2. Be extra careful with cars showing recent interstate rego changes — a move can mask earlier history.
3. Ask which state the car has spent most of its life in, and treat a vague answer as a red flag.
4. Remember: a statutory write-off can never be registered again, while a repairable write-off should be priced for its history.
5. Allow for the 14-day transfer windows used in NSW and Queensland when you plan the purchase.

If you are selling a repaired vehicle

• Disclose the history early. Buyers will find it, and under the Australian Consumer Law undisclosed damage can become a misrepresentation dispute.
• Price to the market, not to the repair bill. Repaired write-offs sit below clean-title equivalents even when the work is excellent.
• Provide the PPSR report and repair documentation in the listing to build trust with cautious buyers.

The bottom line

Your local market is not the whole market. A car that looks clean in a Sydney listing may carry history from a hailstorm in Adelaide or a flood in Brisbane. The state gap is exactly why a national history check — not a local assumption — is what protects you.

Related AUCN data

• Nearly 1 in 4 used cars carry a risk flag
• About 1 in 24 cars shows an odometer anomaly
• How to check a car's previous registration history

Sources

• PPSR — About the PPSR (Australian Financial Security Authority)
• VicRoads — Buy, sell or transfer a vehicle
• Queensland Government — Registration transfer
• Service NSW — Transfer a vehicle registration
• Australian Consumer Law

About this data: AUCN Data, percentage basis, based on AUCN PPSR checks through September 2026. Aggregated percentages only; no individual vehicles or personal information are published. Written-off rates reflect weather, vehicle mix and operating environment, not driver behaviour or brand quality. See the AUCN Data methodology and definitions for how these figures are produced.