Trailer Insurance in Australia: What It Covers, What It Excludes and When You Need It

Trailer insurance is not compulsory in Australia — and that is exactly why so many people find out too late how little cover they actually have. Allianz puts it plainly: “Although you’re not legally required to have caravan or trailer insurance, it’s worth considering whether you could afford to repair or replace your caravan or trailer if it were involved in an accident, stolen, or damaged by a fire or storm.”

Most owners assume their comprehensive car policy has the trailer handled. It does — up to about $1,000, and only in narrow circumstances. This guide sets out what a car policy really pays, what a standalone trailer policy adds, which trailers sit under which product, and why not one Australian insurer will tell you what a policy costs.

What your car insurance actually pays for a trailer

Across the major comprehensive car policies reviewed for this guide, each included a small trailer benefit. It is real, but it is capped in the hundreds — and in most of the policies reviewed it requires the trailer to be attached at the moment of the incident.

Caps read from each insurer’s own product disclosure statement or product page, August 2026. Limits and conditions change — always check the current PDS for your policy.

GIO is the most candid about the gap, on its own site: comprehensive car insurance gives you liability cover if your trailer damages someone else’s property, plus “up to $1000 cover for accidental damage to your trailer caused by separating from your car while moving. This is why you may also want to take out trailer insurance, separate to the limited cover GIO Comprehensive Car Insurance offers.“

There is a second gap most people never think about. GIO again: “GIO Comprehensive Car Insurance won’t cover your trailer if someone else is towing it.” A standalone trailer policy generally will, provided the person towing has your permission and is legally allowed to tow it. If you lend your trailer out — and most people do — that distinction matters more than the dollar cap.

Which product does your trailer belong under?

Australian insurers do not classify trailers consistently. The same trailer can be a “trailer” at one insurer and a “caravan” at another, which changes what is covered and how much you pay.

Suncorp publishes the clearest list of what it will insure: “camper trailers, box trailers, car trailers, dog trailers, gooseneck trailers and horse floats.” RAA’s product wording defines a trailer as “a vehicle designed to be towed by a motor vehicle and designed to transport goods. This includes horse floats, and box and car Trailers.” RACV says any trailer meeting VicRoads requirements can be covered, “including horse trailers, watercraft trailers, boat trailers and utility trailers.”

Boat trailers are insured under the boat policy

This is the single most common mistake we see. Across GIO, Club Marine, RACV, NRMA and Nautilus Marine, the boat trailer is insured as a component of the boat — provided it is declared and shown on your certificate or schedule. GIO’s boat wording defines “your boat” as including “boat hull; boat motor(s); boat trailer,” and specifically covers a trailer “designed for and used to transport your boat.” Tow your boat on a box trailer instead and GIO excludes it.

There is a catch worth understanding. The boat policy covers the trailer as property but pushes towing liability back to your car policy. Club Marine excludes “liability for accidents while your boat trailer is attached to, or when it becomes accidentally detached from, a motor vehicle in motion.” RACV and GIO carry equivalent exclusions. If you own a boat, the practical read is: check the trailer is listed on the boat policy, and don’t assume the boat policy handles anything that happens on the road. Our guide to what boat insurance costs covers how the rest of that policy is priced.

What trailer insurance does not cover

Whatever is in the trailer

This is the most consistent exclusion in the Australian market, and the one that catches tradespeople and hobbyists hardest. GIO: “We only cover damage to the trailer or horse float itself, not its contents.” Suncorp: “There is no contents cover for a trailer or horse float.” NRMA’s FAQ: “Trailer Insurance only covers your trailer.” RACV lists “cover for items inside or on your trailer, like tools, bikes or watercraft” under what is not covered, and adds that “tools and other contents are not included as part of an RACV Trailer Insurance policy.”

RACQ draws the line between its own two products: “‘Contents’ cover is included with Comprehensive Caravan Insurance, but not Comprehensive Trailer Insurance.”

There are exceptions, and they are worth asking about. Allianz offers contents cover up to $6,000 on its caravan and trailer product without additional approval. CIL includes up to $1,000 of contents on its camper trailer product. Youi sells an optional business-items cover. If the load is worth more than the trailer — which, with a box trailer full of tools, it usually is — the contents question should decide which insurer you talk to.

Business and commercial use

Several retail trailer policies reviewed are limited to private use. CGU excludes cover where you use the trailer “for earning income or for any business, trade or profession,” plus hire, rental, trailer sharing, courier or delivery work, or “carrying any goods for financial gain or reward.” NRMA uses identical wording. Suncorp states it “insures personal use caravans, trailers and horse floats — so anything for business use won’t be covered.” Youi requires business use to be disclosed. If your trailer earns money, check the business-use position before you assume you are covered — it may point you to a broker rather than a retail policy.

Unregistered, unroadworthy or wrongly matched

CGU excludes cover while a trailer “is unregistered if the law requires it to be registered,” is “being towed illegally,” is “in an unsafe condition,” or does not meet the registration requirements of its state. Allianz adds a clause that catches more people than it should: no cover where the trailer was “being towed by or was attached to a vehicle which wasn’t equipped to tow your caravan or trailer according to relevant laws,” or where it was overloaded.

Wear and tear

Allianz, CGU, NRMA, Youi, AAMI and RACQ all exclude wear and tear, gradual deterioration, rust, corrosion and depreciation. Insurance covers sudden events, not a trailer that rusted out over fifteen winters.

The runaway trailer: whose policy responds?

Counter-intuitively, this is usually a towing vehicle question rather than a trailer-policy one. In the policies reviewed for this guide, on-road third-party liability arising from an attached or accidentally detached trailer generally sits with the towing-vehicle policy, while standalone trailer policies commonly exclude that circumstance.

Those standalone exclusions are explicit. The CGU trailer wording excludes “liability caused by or arising from the use of your trailer while it is attached to a motor vehicle” and “liability that arises from your trailer if it becomes detached from a motor vehicle… while that motor vehicle… is in use.” NRMA’s trailer product carries the same two exclusions word for word. That headline $20 million liability limit on a trailer policy is for the trailer sitting unattached — in your driveway, at a worksite, parked up.

The car policy is what responds on the road. Shannons covers third-party loss caused by “the caravan or trailer running out of control after separating from your motor vehicle or motorcycle while your motor vehicle or motorcycle is moving,” with a $20 million limit. AAMI and RACQ carry equivalent cover; RACQ’s extends to “attaching or detaching a trailer or caravan to or from your vehicle.”

The regulatory duty sits with the driver. Queensland’s Transport Operations (Road Use Management — Vehicle Standards and Safety) Regulation 2010, s 13R, requires that “a trailer in a light combination must be securely coupled to the vehicle in front of it,” and s 143 requires couplings built so that “if the coupling breaks or accidentally detaches — the trailer is kept in tow.” Trailers over 2,000kg GTM need breakaway brakes that apply automatically on disconnection and hold for at least 15 minutes.

Registration: the 750kg rule is not what you think

We did not find a 750kg registration exemption in any transport guidance we reviewed. It is one of the most repeated claims online. Of the jurisdictions whose exemption provisions we actually examined, Victoria publishes a weight-based exemption — set at 200kg, not 750kg — and Tasmania publishes an exemption list carrying no weight threshold at all. We did not examine the exemption provisions of the other jurisdictions, and we did not verify the position in South Australia or Western Australia.

750kg is a braking threshold. Vehicle Standards Bulletin 1 (VSB1) Revision 6, published by the Commonwealth Department of Infrastructure in September 2024, states that brakes are not required on trailers up to 750kg GTM, and that “trailers exceeding 750kg GTM must be fitted with an efficient service braking system.” That is a brakes rule, not a registration rule.

On the requirement to register, five jurisdictions were verified for this guide: New South Wales, Queensland, the ACT, the Northern Territory and Tasmania. Service NSW: “If you want to tow a caravan or trailer on NSW roads, you must get it registered at a Service NSW Centre.” Queensland Government: “The vehicle and trailer must be roadworthy and registered.” Access Canberra requires light trailers under 4.5 tonne GVM to be registered. The Northern Territory Motor Vehicle Registry publishes that registration “applies to cars, motorcycles, trailers and other motor vehicles”, and Tasmania publishes that a vehicle “will need registration if parked or used on public streets”.

Victoria is the one jurisdiction we examined that publishes a weight-based registration exemption, and it is set at 200kg — not 750kg. Transport Victoria exempts “trailers (other than trailers specifically built to carry a boat) that are not used in the course of trade and: weigh less than 200kg empty; are not wider than the vehicle towing it; are not more than 3m long including the drawbar and any load.” Registration rules are set by each state and territory, so confirm the position with your own authority.

Two definitions worth having straight, both from VSB1: ATM (aggregate trailer mass) is the total mass of a fully loaded trailer including what it puts on the towball. GTM (gross trailer mass) is only what the trailer’s own tyres put on the ground while coupled. Braking thresholds are set in GTM; coupling ratings in ATM. Above 4.5 tonnes ATM you are no longer in light-trailer territory at all — the NHVR defines a heavy vehicle as one with a GVM or ATM over 4.5 tonnes.

Does CTP cover a towed trailer?

A trailer does not carry compulsory third party insurance of its own. The NSW Government states that all new vehicles require CTP “except for trailers and caravans.” Queensland’s position is that “most trailers do not need compulsory third party (CTP) insurance if they are being towed by a Queensland registered vehicle,” and directs owners to check with the towing vehicle’s CTP insurer. GIO, as a CTP insurer, confirms: “provided your trailer or caravan is in a roadworthy condition, it’s covered by CTP insurance when being towed by a registered vehicle.”

Remember what CTP is for. It covers personal injury only. It pays nothing toward your trailer, and nothing toward someone else’s property — those outcomes are dealt with under whichever motor or trailer policies you hold, on their own terms.

What does trailer insurance cost?

We checked twenty Australian insurers for this guide — GIO, Allianz, Suncorp, AAMI, NRMA, RACV, RAA, RACQ, CIL, Shannons, Youi, Budget Direct, Coles, Woolworths, CGU, QBE, Elders, WFI, Club Marine and Nautilus Marine. Not one publishes an average or typical trailer premium. Any figure you see quoted as “the average cost of trailer insurance in Australia” is not traceable to an insurer.

What insurers do publish is what they price on. Allianz lists the factors and then tells you to call: where the trailer is parked, the type of trailer, and your claims history. Across the market the consistent inputs are the trailer’s value and age, its type and size, where it is kept overnight, how it is secured, your claims history, the excess you choose, and whether you need contents or business-use cover added.

Two structural points shape the answer more than any of those. First, a box trailer worth $1,200 sits close to the $750–$1,500 your car policy already covers — the case for a standalone policy is weakest at the cheap end and strongest for high-value, custom or frequently-lent trailers. Second, the market has thinned: QBE stopped selling caravan and trailer insurance on 9 February 2024, and CGU has been broker and partner only since 27 June 2025. Fewer direct options means comparing on cover, not just price.

Buying, selling or towing? Start here

• Leisure insurance — the hub for boats, jet skis, caravans and towed assets
• Horse float insurance — what is covered, what is not, and why animals sit outside it
• Boat insurance cost — including how your trailer is treated inside the boat policy
• Jet ski insurance cost
• Trailer financing and camper trailer finance if you are still buying
• Car insurance — where the towing cover on your own vehicle actually lives

Not sure which policy your trailer belongs under?

Tell us what you tow and how you use it, and we’ll help you work out whether your car policy is enough or whether a standalone trailer policy makes sense.

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Trailer insurance FAQs

Is trailer insurance compulsory in Australia?

No. Allianz states that you are not legally required to have caravan or trailer insurance. Registration is compulsory for road use in every state we checked, but insuring the trailer itself is your choice. Compulsory third party insurance covers personal injury only and does not extend to your trailer or to property damage.

Does my car insurance already cover my trailer?

Only up to a small capped amount, and usually only while the trailer is attached. Published caps run from $750 (RACQ) to $1,500 (Youi, NRMA Comprehensive Plus, Shannons), with $1,000 the most common. GIO says on its own site that this is exactly why owners may want separate trailer insurance. Your car policy also generally will not cover the trailer when someone else is towing it.

Are the tools and gear in my trailer covered?

Usually not. GIO covers damage to the trailer or horse float itself, not its contents. Suncorp states there is no contents cover for a trailer or horse float, and NRMA says trailer insurance covers only the trailer. Some insurers sell contents as an add-on — Allianz offers up to $6,000 on its caravan and trailer product — so ask specifically if the load is worth more than the trailer.

Do I need to register a trailer under 750kg?

The 750kg figure is a braking threshold from Vehicle Standards Bulletin 1, not a registration exemption — trailers up to 750kg GTM do not need brakes. We did not find a 750kg registration exemption in any transport guidance we reviewed. Of the jurisdictions whose exemption provisions we examined, Victoria publishes a weight-based exemption set at 200kg and Tasmania publishes an exemption list with no weight threshold. Separately, five jurisdictions were verified as publishing a requirement to register a trailer used on the road: New South Wales, Queensland, the ACT, the Northern Territory and Tasmania. We did not verify the position in South Australia or Western Australia. The only weight-based registration exemption we located is Victoria, for non-commercial trailers under 200kg tare, under 3m long and no wider than the towing vehicle. Registration rules are set by each state and territory — confirm the position with your own transport authority.

Is my boat trailer insured separately?

Normally no — it is insured as part of your boat policy, provided it is listed on your certificate or schedule. GIO defines your boat as including the boat trailer. Note that boat policies typically exclude liability while the trailer is attached to a moving vehicle, so on-road liability runs back through your car policy.

What happens if my trailer comes off and causes damage?

That is generally handled by the towing vehicle policy, not the trailer policy. Standalone trailer policies from CGU and NRMA both exclude liability arising while the trailer is attached to a motor vehicle, or where it detaches from one in use. Shannons, AAMI and RACQ all cover the runaway scenario under their car policies, typically with a $20 million third-party limit.

Written and reviewed by the team at Car Buyers Assist. This article is general information only and does not take into account your objectives, financial situation or needs. It is not a recommendation to take out any particular policy. Car Buyers Assist helps connect you with insurance providers and does not issue insurance. Cover, limits, exclusions and conditions vary between insurers and change over time — always read the current Product Disclosure Statement and Target Market Determination before deciding. Policy limits and wording quoted above were read from published insurer documents in August 2026.