Compulsory third party insurance in New South Wales costs around $450 per vehicle each year, but that premium only scratches the surface of what state-mandated insurance actually covers and what it leaves exposed. Across Australia, compulsory lines account for 55% of all general insurance premiums — that’s $78.9 billion in mandatory coverage people pay for, often without knowing exactly what they’re getting or where the gaps sit. The average CTP personal injury claim settles at $120,000, which gives you a sense of why the law requires this cover in the first place. But the minimum legal requirement and adequate protection are rarely the same thing, and the difference shows up most painfully when a claim falls outside the mandated scope.
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Those numbers are national figures, but each state and territory sets its own minimum coverage levels. What you’re legally required to carry in Queensland won’t match the rules in Victoria, and the fine print in your policy determines whether a claim gets paid or denied — 4.2% of claims are rejected industry-wide. Understanding what the law actually demands, and where the mandatory cover stops, is the difference between being compliant and being properly protected. Here’s what you actually need to know.
The central concept here is compulsory third party (CTP) insurance, but that’s just one piece of the mandatory coverage picture. Each state defines its own minimum requirements for different insurance lines, and the costs and coverage levels vary significantly.
Mandatory Insurance Levels Across Australia — What Each Line Costs and Covers
State-mandated insurance in Australia falls into several distinct lines, each with its own premium base, claim frequency, and average payout. The table below lays out the major compulsory categories and what they mean for the person paying the premium.
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| Insurance Line | Annual Premiums / GWP | Average Claim Cost | Claims Paid / Frequency |
|---|---|---|---|
| CTP (all states) | $4.8 billion | $120,000 | 85,000 settled |
| Workers’ Compensation | $7.2 billion | $28,000 | $5.1 billion paid |
| Motor Vehicle (3rd party + comprehensive) | $18.4 billion | $5,200 | 12.5% claim frequency |
| Home Building (mandatory in some states) | $9.2 billion | $15,000 | $2.8 billion paid |
That CTP figure — $120,000 per claim — is the number that justifies why every state requires this coverage. Without it, a serious accident could leave a victim with no financial recourse. But here’s what that table doesn’t show: CTP only covers injury to people. If you hit another car, your mandatory CTP policy pays nothing toward the repair. You’d need separate third-party property cover for that, and comprehensive cover if you want your own vehicle repaired.
Workers’ compensation is another compulsory line that varies by state. Nationally, $7.2 billion in premiums were collected in FY2022, and $5.1 billion was paid out across an average of 85,000 claims. The average claim cost of $28,000 reflects the mix of medical expenses and lost wages, but the coverage threshold and employer obligations differ depending on which state the worker is in.
Home building insurance is mandated in some states for certain situations — for example, builders in NSW must carry it for residential construction work over $20,000. The average home building claim sits at $15,000, and total paid claims reached $2.8 billion. Weather-related events now account for 38% of all general insurance claims, pushing premiums up 7.8% in 2022 alone.
What I’d weigh here: minimum legal coverage in any line rarely matches what you’d want if a real claim lands on your desk. The gap between the $450 CTP premium and the $120,000 average claim is exactly why the law mandates it, but the gap between CTP and a proper comprehensive policy is where most out-of-pocket costs live.
Where the Gaps Are — Underinsurance and Missed Obligations
The research shows three recurring places where people fall short of adequate coverage, even when they comply with state-mandated minimums.
The CTP blind spot — property damage
Every state requires CTP insurance, but not a single state requires it to cover vehicle damage. If you’re at fault in a collision, the other driver’s repair costs come out of your pocket unless you hold separate third-party property cover. With an average motor claim of $5,200 and a total loss averaging $28,500, the gap between being insured for injury but not for property is the most common and costly mistake. The claims settlement time for motor claims averages 11 days, so the bill arrives fast.
Underinsurance on home and contents
Home insurance premiums rose 7.8% in 2022, driven largely by weather-related losses that now make up 38% of general claims. The average home claim is $15,000, but in flood-prone areas strata claims frequency runs 22% higher. The risk is that homeowners insure for the minimum required by their mortgage lender without factoring in replacement cost escalation from construction inflation. Natural disaster losses hit $5.6 billion in 2022, and many claims fall short of full rebuild costs because policy limits weren’t updated.
Workers’ compensation — employer obligations differ by state
Each state sets its own threshold for when an employer must carry workers’ comp. In some states, a single part-time employee triggers the requirement. In others, the payroll threshold is higher. The national average claim is $28,000, but the obligation to carry cover — and the penalties for failing to do so — are state-specific. Small business owners who operate across state lines often miss this. The claims frequency sits at 8.9 per 1,000 employees, so the likelihood of at least one claim rises quickly as headcount grows.
What I tend to notice is that the most expensive error by far is assuming CTP covers everything. That $120,000 average injury payout makes it feel like serious coverage, but it leaves the single biggest cost — vehicle repair — completely unprotected. A good car insurance comparison should start with what your state mandates and then layer on what your actual risk profile demands.
Meeting Your Legal Requirements — Without Leaving Yourself Exposed
Understanding what the law requires is step one. Making sure you’re not underinsured despite being compliant is step two. Here’s how the process works for the major compulsory lines.
CTP — what’s included in your rego and what isn’t
In most states and territories, CTP is bundled with your vehicle registration. You pay it annually when you renew, and the insurer is chosen either by the state government or through a regulated market, depending on where you live. The process is automatic — you can’t register a vehicle without it. What you need to do separately is check whether your CTP covers you as a driver, passenger, pedestrian, or all three. Some states include the driver in the cover; others don’t. If you want cover for your own vehicle, you need to take out a separate car insurance policy that includes natural disaster protection since CTP covers nothing related to weather events.
Workers’ compensation — how to check your state’s threshold
The first step is confirming whether your state requires you to hold a policy. If you have employees — even one — most states require you to carry workers’ compensation insurance. The application goes through a state-regulated insurer or a licensed private insurer, depending on the jurisdiction. You’ll need to provide your estimated annual payroll, business activities, and claims history. Premiums are calculated as a percentage of payroll, with industry rates varying by risk classification. The national average premium base is $7.2 billion, but individual business rates depend on your industry code and claims record. If you’re unsure about your legal obligations, asking a qualified professional through a service like JustAnswer Business Law can clarify your state-specific requirements without the cost of a full legal consultation.
Home building insurance — when it’s mandatory and when it’s optional
Home building insurance is mandatory for builders in some states for projects above a certain value — in NSW, that threshold is $20,000. It covers the homeowner if the builder dies, becomes insolvent, or disappears. If you’re a homeowner, your lender will require building insurance as a condition of the mortgage. That’s not a state mandate, but it functions like one. The average premium per risk for householders reached $1,352 in 2024, up from $1,275 the year before. Contents cover is optional, but with average home claims at $15,000, skipping it leaves a large gap.
Upcoming regulatory changes — CPS 230 and mandatory climate reporting
From 2025, APRA’s CPS 230 standard requires all insurers to demonstrate operational resilience — how they’d continue paying claims during a major disruption. Separately, mandatory climate-related financial reporting is being phased in, which will affect how insurers price risk in flood- and fire-prone areas. The practical effect for policyholders is that some premiums will rise as insurers factor in climate risk more explicitly, and some properties may become harder to insure at any price. Keep an eye on renewal letters for notices about updated risk assessments.
Frequently Asked Questions
Does CTP cover me if I’m at fault? ▾
Is workers’ compensation required for a single part-time employee? ▾
What happens if I let my CTP lapse? ▾
Does mandatory home building insurance cover contents? ▾
Why did my premium go up even though I didn’t claim? ▾
Can I choose my own CTP insurer? ▾
The Real Cost of Meeting the Minimum
State-mandated insurance levels exist to protect people from the financial devastation of a serious accident, and they do that well — the $120,000 average CTP payout and $28,000 workers’ comp claim show the system works for its core purpose. But the legal minimum is a floor, not a ceiling. The 4.2% of claims that get denied, the 55% of premiums that go to compulsory lines, and the natural disaster losses that hit $5.6 billion in a single year all point in the same direction: compliance keeps you legal, but it doesn’t keep you whole. The best approach is to know exactly what your state requires, then decide what additional coverage fills the gaps that matter most for your situation.
Remember: this article is general information only. For advice on your specific situation, speak to a qualified professional.
If this was useful, you might also want to read road trip ready car insurance essentials before hitting the Australian highway.
Sources and Further Reading
Tips for car insurance and personal accident policy in Australia — Practical guidance on combining mandatory CTP with optional personal accident cover.
Understanding rear-end collision liability for car insurance — How fault determination interacts with state-mandated coverage levels.
Gitnux (2024). Australian Insurance Industry Statistics. 🔗
Gitnux (2024). Australia Insurance Industry Statistics. 🔗
World Metrics (2024). Australian Insurance Industry Statistics. 🔗
KPMG (2026). General Insurance Insights 2026. 🔗
