Compulsory Third Party (CTP) insurance is legally required for every registered vehicle in Australia. It covers personal injury to other people if your vehicle is involved in an accident, but it does not cover property damage or your own injuries. The cost and administration of CTP vary by state and territory, with premiums determined by factors including your age, location, driving history, and vehicle type.

Introduction

If you own or register a vehicle in Australia, you must have Compulsory Third Party (CTP) insurance. Known as a green slip in New South Wales and the Australian Capital Territory, CTP is designed to protect road users by covering medical and compensation costs when someone is injured in a motor vehicle accident. While it is a legal requirement, many drivers do not fully understand what CTP covers, what it excludes, or how it differs from other types of motor vehicle insurance. Understanding CTP insurance is essential for every Australian driver, as covered in foundational insurance education materials such as Principles of Finance.

This listicle breaks down seven essential facts about how CTP insurance works in Australia.

1. What CTP Insurance Is

Compulsory Third Party insurance is a mandatory form of personal injury cover linked to your vehicle registration. It compensates people who are injured or killed in an accident involving your vehicle, regardless of who is at fault. CTP schemes are administered by state and territory governments, and each jurisdiction operates its own system with different insurers, premiums, and claim processes. According to the Insurance Council of Australia, CTP is one of the oldest forms of compulsory insurance in the country (Insurance Council of Australia, 2026).

2. Who Needs CTP Insurance

Every vehicle registered in Australia must have current CTP insurance. This includes cars, motorcycles, trucks, and commercial vehicles. You cannot register or renew your vehicle registration without proof of CTP cover. If you drive an unregistered or uninsured vehicle, you can face significant fines, licence suspension, and personal liability for any injuries caused in an accident. CTP is bundled with vehicle registration in some states and purchased separately in others.

3. What CTP Insurance Covers

CTP insurance covers compensation for personal injuries to other road users, including drivers, passengers, pedestrians, and cyclists injured in an accident involving your vehicle. Cover typically includes medical expenses, rehabilitation costs, lost income, and pain and suffering. If the accident results in death, CTP provides compensation to the deceased person’s family. The Australian Securities and Investments Commission notes that CTP schemes are designed to ensure injured people receive necessary care and financial support (MoneySmart, 2026).

4. What CTP Insurance Doesn’t Cover

CTP insurance does not cover property damage to other vehicles, fences, buildings, or infrastructure. It also does not cover damage to your own vehicle or injuries you sustain in an accident. For these risks, you need separate cover such as third party property insurance or comprehensive car insurance. CTP is solely focused on personal injury liability, so if you damage another person’s car, you are personally liable unless you hold additional property cover.

Read also: How to Lower Your Car Insurance Premium in Australia: 9 Proven Strategies

5. How Much CTP Insurance Costs

CTP premiums vary significantly by state, insurer, vehicle type, driver age, and location. In New South Wales and the Australian Capital Territory, you can compare green slip prices from multiple licensed insurers and choose the best price. In other states and territories, CTP is administered by a single government scheme or a limited panel of insurers. Premiums are typically higher for younger drivers, high-performance vehicles, and vehicles registered in higher-risk areas. As of October 2026, annual CTP premiums can range from a few hundred dollars to over a thousand dollars depending on these factors. Always confirm current pricing with your state’s CTP regulator or insurer before renewing registration.

6. How to Get CTP Insurance

In states where CTP is purchased separately (such as New South Wales and the Australian Capital Territory), you obtain a green slip from a licensed CTP insurer before renewing your vehicle registration. You can compare quotes online and purchase cover directly from the insurer. In states where CTP is bundled with registration (such as Victoria, Queensland, and South Australia), the premium is included in your annual registration fee and automatically paid to the state scheme. Check your registration renewal notice or your state transport authority website for specific instructions and deadlines.

7. State-by-State Differences

CTP insurance operates differently across Australia. In New South Wales and the Australian Capital Territory, it is called a green slip and purchased from competing private insurers. In Victoria, it is managed by the Transport Accident Commission (TAC), a state government scheme. In Queensland, the Compulsory Third Party scheme is administered by the Motor Accident Insurance Commission. South Australia, Western Australia, Tasmania, and the Northern Territory each have their own systems, some government-run and others involving private insurers. These differences affect premium costs, claim processes, and the level of cover provided. Always consult your state or territory government transport website and read the Product Disclosure Statement (PDS) to understand the terms that apply to your vehicle.

Conclusion

Compulsory Third Party insurance is a critical component of vehicle ownership in Australia, providing essential protection for people injured in motor vehicle accidents. While CTP is legally required and covers personal injury liability, it does not replace the need for additional motor vehicle insurance to protect against property damage and your own financial risks. Understanding what CTP covers, how much it costs, and how it operates in your state or territory helps you meet your legal obligations and make informed decisions about your overall motor vehicle insurance needs. Before purchasing or renewing CTP cover, read the Product Disclosure Statement and the Target Market Determination, compare premiums where choice is available, and consider consulting a licensed insurance adviser if you have questions about your personal cover needs.

General Advice Warning

This article provides general information only and does not take into account your objectives, financial situation, or needs. Before acting on this information, consider whether it is appropriate for you. Read the relevant Product Disclosure Statement (PDS) and consider obtaining personal advice from a licensed insurance adviser. CTP cover, exclusions, premiums, and schemes vary by state and territory. Confirm current terms with your state’s CTP regulator or insurer and consult a licensed adviser for your personal circumstances.