Your car’s make, model, and year feed into SIRA’s vehicle classification system, which groups vehicles by use and size rather than brand or engine performance. A Toyota Camry and a Ford Mustang both sit in Class 1. A dual-cab ute sits in Class 3.
NSW CTP insurance, also known as compulsory third party (CTP), is required for all motor vehicles registered in NSW. This green slip insurance NSW covers the cost of motor accident injuries caused to other drivers, passengers and pedestrians.
You cannot register your vehicle without first purchasing a CTP green slip. But the price you pay for that green slip varies between insurers, and your vehicle’s details are one of the key reasons why.
Does a car affect the green slip price in NSW? The answer depends on which vehicle factors you mean, and several of them move your CTP premium more than most drivers realise.
How Does SIRA Classify Vehicles for CTP Pricing?
SIRA groups every registered vehicle in NSW into a standardised class, and that class is the starting point for every CTP green slip price. Here is how the system works and what it means for your vehicle.
The SIRA Vehicle Classification System
The State Insurance Regulatory Authority (SIRA) requires all six licensed insurers in New South Wales to use the same standardised vehicle classes when setting green slip prices. These classes come from the Schedule of Premium Relativities in SIRA’s Motor Accident Guidelines.
The main classes covering most NSW drivers are listed below.
| Vehicle Class | Vehicle Type | Description |
| Class 1 | Motor Car | Cars, station wagons and passenger 4WDs with 9 or fewer seats. No differentiation by performance or engine capacity. |
| Class 3(c) | Light Goods Vehicle | Goods-carrying vehicles (utes, vans, dual-cab utes) with GVM ≤ 4.5 tonnes. |
| Class 3(d) | Medium Goods Vehicle | GVM > 4.5 to 16 tonnes. |
| Class 3(e) | Heavy Goods Vehicle | GVM > 16 tonnes. |
| Class 5 | Primary Producer’s Vehicle | Farm vehicles not in Class 1 (excluding motorbikes and farm machinery). |
| Class 7 | Taxi | Motor car standing in the street for hire. |
| Class 8 | Private Hire Car | Motor car for hire that does not stand in the street (rideshare, limousine). |
| Class 10 | Motorbike | Classified by engine capacity: 10(d) ≤225cc and electric; 10(e) 226–725cc; 10(f) 726–1125cc; 10(g) 1126–1325cc; 10(h) >1325cc. |
One thing most car owners miss: Class 1 has no differentiation by performance or engine capacity. A small four-cylinder sedan is rated the same way as a high-performance sports car or a passenger-carrying 4WD.
Vehicle type does matter at the class level: a ute (Class 3) generally pays more than a sedan (Class 1). But within Class 1, your car’s badge doesn’t move the class rating. Utes and light goods vehicles (Class 3) generally cost more to insure than standard motor cars (Class 1) due to their higher risk profile.
Truck and commercial vehicle owners can use the Truck Greenslip Calculator in NSW for class-specific pricing.
Does My Car’s Age Affect My Green Slip Price?
Vehicle age is a confirmed CTP rating factor. Insurers set prices based on the risk of injury claims associated with the vehicle, and older vehicles often carry a higher risk profile. Young drivers in older vehicles can face some of the highest CTP premiums for this reason.
Why Older Cars Can Mean Higher Premiums
Older cars tend to lack modern safety features: side curtain airbags, autonomous emergency braking and lane-keep assist, which reduce the severity of injuries sustained in a motor vehicle accident.
Newer vehicles with advanced safety features are considered lower risk, which can mean lower CTP premiums.
Does Newer Always Mean Cheaper for CTP?
“Newer” doesn’t automatically mean “cheapest”. Insurers differ in their risk calculations for specific vehicles. Apia, for example, confirms they consider “various rating factors such as, but not limited to, the vehicle’s age, make/model and shape” when calculating premiums.
Different variants of the same vehicle model can be priced differently based on risk factors such as engine size and performance capabilities.
The accident history of the vehicle type also influences CTP insurance premiums. If a particular make and model is involved in more frequent claims across NSW, insurers factor that pattern into their pricing, even if your specific car has never been in an accident.
Our guide covers every factor that raises your premium: why your green slip might be so expensive.
Do Sports Cars or Performance Cars Cost More for CTP?
SIRA’s classification puts all passenger vehicles, sports cars included, into Class 1. A Toyota Yaris and a Nissan GT-R share the same class.
Insurer Risk Models Within the Same Class
Insurers can and do apply their own risk models within a class. SIRA’s guidelines set the framework; individual insurers then fine‑tune pricing using approved rating factors such as age, garaging location, driving history and claims history.
This is why green slip prices vary from insurer to insurer for the same car.
Performance cars (Class 1) are priced the same way as sedans at the SIRA class level, so don’t assume your green slip will be dramatically more expensive than a standard sedan.
It is worth checking quotes from every licensed CTP provider in NSW, because the way each one assesses your vehicle, location, and driving history can create meaningful price differences even for the same car.
Compare insurer pricing in our Green Slip Comparison Guide for New Drivers.
How Do Modifications Affect My Green Slip Price?
Modifications in vehicles seems easy and doable, until you realised you also need to consider the following before paying the auto shop.
CTP Green Slip and Vehicle Modifications
Vehicle performance and modifications can increase CTP insurance premiums due to associated higher accident risks. If you’ve modified your car (engine swap, turbo kit, suspension changes, larger wheels), you need to understand two separate insurance impacts.
For CTP purposes, modifications that change your vehicle’s class or registered specifications may affect your CTP premium.
For example, converting a passenger vehicle into a goods‑carrying vehicle shifts it from Class 1 to Class 3, and Class 3 premiums are higher. But cosmetic modifications that don’t change the vehicle’s class or registered use are unlikely to move your CTP price.
Comprehensive Insurance and Modifications
Comprehensive car insurance. This is where modifications have a much bigger impact. Comprehensive insurers assess the replacement value of aftermarket parts, the increased risk of theft for modified vehicles, and the higher repair costs. That is separate from your green slip.
NSW Compliance Requirements for Modified Vehicles
If your vehicle has been significantly modified, NSW requires an engineer’s certification and approval from Transport for NSW. You will also need to update your vehicle details through Service NSW before re-registering.
A vehicle that fails to meet compliance standards may face a cancelled registration, which means your CTP green slip insurance lapses too.
Buying a used car with undisclosed modifications? You may need a blue slip inspection before registering it. A blue slip confirms the vehicle meets NSW safety and identity standards and is required for previously unregistered vehicles, interstate transfers, or vehicles whose registration has expired for more than three months.
The complete compliance process (what requires certification, approval and re-registration) is in our guide on Vehicle Customisation and Modifications in NSW.
What Other Vehicle-Related Factors Affect Your Green Slip?
How Vehicle Use, Location and Registration Period Affect Green Slip Price
Beyond vehicle class, age and modifications, several vehicle‑linked details feed into your CTP premium.
- How the vehicle is used. Using a vehicle for commercial purposes significantly increases green slip costs compared to private use. A Class 1 car used as a private hire car (Class 8) attracts a different premium entirely.
- Where the vehicle is garaged. The suburb where your car is garaged significantly impacts your premium based on the likelihood of motor accidents in that area. Sydney NSW postcodes are generally the most expensive; country areas are cheapest.
- Registration period. Light vehicles up to 4.5 tonnes GVM can be registered for 6 or 12 months. Heavy vehicles over 4.5 tonnes GVM, and trailers, can be registered for 3, 6 or 12 months. The registration fee is paid separately from your CTP green slip. The period of the green slip must match the period of registration.
- The fund levy. Every green slip includes a fund levy set by SIRA. It has two components: the Lifetime Care and Support Authority (LTCS) levy, which funds lifetime care and rehabilitation for people with severe injuries such as brain injuries, spinal cord injuries and burns; and the Motor Accidents Operational Fund (MAOF) levy, which helps fund NSW road‑crash hospital and ambulance care and the agencies that run the CTP scheme.
Driver and Claim History Factors
Your CTP green slip premium is influenced by both the overall cost of claims across NSW and your individual details, including your vehicle type, age, how the vehicle is used, and your driving history.
Demerit points affect your CTP premium with some insurers, as do claims history, serious driving offences, at-fault accidents, and licence suspensions.
What CTP Insurance Covers in NSW
CTP insurance covers medical expenses and lost income for people injured in a motor vehicle accident under the NSW CTP scheme. CTP claims are managed by the licensed insurer that issued the green slip for the vehicle at fault.
All injured people, including at-fault drivers, may access statutory benefits for treatment and income support, subject to SIRA’s fault and eligibility rules. The duration and level of benefits depend on who was at fault and how serious the injuries are.
Your green slip covers medical treatment, lost income and care needs for all people injured in a road accident in NSW, regardless of fault, including New South Wales drivers, passengers and pedestrians.
Your CTP green slip does not cover damage to your vehicle or other vehicles, or damage to property. For that, you need separate comprehensive car insurance or third-party property insurance.
If you purchase a CTP green slip but do not register your car, refund rules depend on your insurer and SIRA’s current guidelines. Check with your CTP insurer or SIRA before you buy if there’s any chance the vehicle won’t be registered.
Special Situations That Affect Your Green Slip Price
Learner Drivers, Provisional Licences and CTP
Learner drivers and those on a provisional licence are covered by the CTP green slip for the vehicle they drive. The green slip is attached to the registered vehicle, not the individual driver. A learner driver is covered by the third party CTP insurance issued for that vehicle, regardless of who holds the licence.
Where a learner driver is involved in a motor vehicle accident, CTP covers the injured person’s medical treatment and lost income through the same NSW CTP scheme that applies to all other road users.
Each of the six licensed CTP insurers in NSW must price within SIRA’s framework but applies its own risk model within each vehicle class. The cheapest green slip available to you will depend on how each insurer rates your specific vehicle, where it is garaged, and your driving history.
Using a green slip calculator to compare all six insurers side by side is the most reliable way to find the cheapest price on your CTP. GST applies to CTP premiums, but unlike some business insurance products, green slips do not generate an input tax credit for private vehicle owners. Business owners who register vehicles for commercial use should check their eligibility for an input tax credit with their accountant.
If your vehicle is registered in the Australian Capital Territory and you move to NSW, you will need to re-register in NSW and obtain a new NSW CTP green slip. The CTP schemes differ between states, and an ACT registration does not satisfy the NSW requirement.
For vehicles transferred interstate, a blue slip inspection may also be required before NSW registration is issued. Comprehensive insurance remains a separate product from your CTP green slip and covers property theft, vehicle damage and third-party property damage, none of which your green slip includes.
What to Do Now
- Use a green slip calculator. The SIRA Green Slip Price Check and independent calculators let you compare green slip prices across all six licensed insurers in New South Wales. Small differences in how each CTP insurer rates your specific vehicle can add up.
- Check your vehicle details are correct. Wrong vehicle type, wrong year, wrong use class: any of these can mean you’re paying more than you should, or worse, your CTP policy may not match your car’s registration.
- You can change CTP insurers at renewal. You can change your CTP insurance provider at the start of each registration period. Shop around. You’re not locked in.
- Selling your car? Your CTP green slip is linked to your vehicle’s registration and will automatically transfer to the new owner when the vehicle changes hands. The seller must lodge a Notice of Disposal with Transport for NSW, and the buyer must transfer the registration within 14 days. The green slip does not need to be cancelled separately.
- Compare with G4E. Our calculator shows all six insurers side by side, and every CTP sold through Greenslips 4 Earth funds the planting of a tree. That makes your compulsory insurance a little kinder to the planet.
People Also Ask About Prices and Car Modifications
Maybe you’re wondering if you’re maximising the benefits of your greenslip and the cost you’ve paid for it. Well, here are the burning questions of most drivers to give you clarity on your next purchase.
1. Does Car Make or Model Affect Green Slip Price?
At the SIRA class level, no. All passenger cars sit in Class 1 regardless of make or model. But insurers apply their own risk models within that class, so a high-claims model may cost slightly more with some CTP providers. That is why it pays to compare all six insurers, even for the same car.
2. Are Old Cars Cheaper for Green Slips?
Not necessarily. Older vehicles often lack modern safety features, which can mean higher injury severity in accidents. This can push CTP premiums up, not down. Newer, safer vehicles may attract lower premiums, especially when they have strong ANCAP safety ratings.
3.Do Sports Cars Cost More for CTP?
At the SIRA class level, sports cars and standard sedans are both Class 1. But individual insurers may factor in claims history for specific models. The price difference between insurers is often larger than the difference between car types within Class 1, so comparing providers matters more than the badge on the bonnet.
4. Do Vehicle Modifications Affect CTP Price?
Modifications that change your vehicle’s class, for example converting a passenger car to a goods vehicle, will affect your CTP price. Cosmetic mods within the same class are unlikely to change it. Major modifications require an engineer’s certificate and Transport for NSW approval.
5. What Vehicle Factors Change CTP Price?
Vehicle class, vehicle age, how the vehicle is used (private vs commercial), where it’s garaged, and the registration period all influence your green slip price. Your driving history, demerit points, claims history and at‑fault accidents also affect pricing, but those are driver factors, not vehicle factors.
