Boat trailer rego in Queensland: the paperwork and towing basics

Your boat trailer needs its own rego, separate from the boat

Yes, the trailer and the boat are registered separately in Queensland. The Queensland Government says trailers and caravans used on Queensland roads must be registered. The boat is a different case: all boats, jet skis included, with an engine of 3kW or more must be registered when they're on the water.

Both registrations go through TMR, but they're two separate records with separate forms. The trailer follows the vehicle rules, with number plates and, from 751 to 4,500kg ATM, safety certificates. The boat is registered as a regulated ship on the Queensland regulated ship registration application (F3525), and its registration numbers go on the hull, readable from 30 metres.

That split catches people out when they buy a rig. TMR's boat registration page spells it out: if you've bought or sold a boat with a registered trailer, you also need to transfer the trailer registration. One sale. Two transfers. Boat rego doesn't include third party insurance either, so sort that cover with an insurer.

What your trailer needs depends on its ATM: the 750kg line

Every boat trailer towed on Queensland roads needs rego, whatever its size. What changes with size is the inspection paperwork, and the figure that decides it is the trailer's aggregate trailer mass (ATM).

At 750kg ATM or less, the trailer isn't on TMR's list of vehicles that need a safety certificate. For a first registration, the vehicle details inspection sheet (F3529) is optional, though you still have to give TMR the same details.

From 751 to 4,500kg ATM, the trailer needs a current safety certificate when it's sold or transferred while registered, or moved across from interstate registration. On its first registration (a trailer never registered anywhere in Australia) it also needs a pre-registration inspection, and so does any trailer with more than one axle, even a lighter one.

Above 4,500kg ATM, the trailer is a heavy trailer and needs a current certificate of inspection at all times, unless it's exempt.

Not sure where yours sits? Check its ATM before you buy, sell or book anything. The table below sets out the three bands.

Safety certificates: the seller gets one before a 751 to 4,500kg trailer changes hands

An RWC, or roadworthy certificate, is what Queensland calls a safety certificate, and for a trailer of 751 to 4,500kg ATM it's the seller's job. TMR says you must give the new owner a current certificate when you transfer the registration, and that getting one isn't the new owner's obligation. A seller who doesn't can be fined. Without it, the buyer can't transfer the registration out of your name.

You don't need the certificate to advertise the trailer. You do need it before you dispose of it, unless you're selling to a dealer. Only approved inspection stations can issue one, according to [TMR's safety certificate page](https://www.qld.gov.au/transport/registration/roadworthy). The inspection checks basics like tyres, brakes, suspension, body rust or damage, and lights. It's a safety check, not a full mechanical inspection.

Timing matters. A private seller's certificate lasts 2 months or 2,000km, whichever comes first. Each certificate covers one transfer only, so a second sale needs a new one. You also need one to re-register an unregistered trailer, and the same 2-month or 2,000km limit applies.

Registering a trailer for the first time happens in person

New trailer registrations can't be done through TMR's online services. You'll need a new registration if the trailer has never been registered, if you've bought a used unregistered one, if you've moved from another state, or if its rego expired more than 3 months ago.

The identity check depends on age. A trailer built or registered from 1 July 2023 needs a Vehicle Identification Number applied for online through the Road Vehicle Regulator system, then a pre-registration inspection to confirm its identity. An older trailer needs a vehicle details inspection sheet and proof of where it came from. Pre-registration inspections for trailers only run at some service centres, so check before you tow it in.

Bring a safety certificate if your trailer needs one, proof of your garage address and proof of identity, then pay the registration fees and any registration duty. Moving up from interstate? A trailer still wearing its interstate plate has 14 days to be registered here. Most trailers don't need CTP insurance when a Queensland registered vehicle tows them, but check with your car's CTP insurer.

Buying or selling a boat and trailer: transfer both within 14 days

When a used trailer or boat changes hands, its registration must be transferred within 14 days. Buy a rig and you're doing that twice, once for the trailer and once for the boat.

Online, it's a two-step process. The seller transfers the registration out of their name first, then the buyer finishes the transfer and pays the transfer fee. The seller pays nothing. You can't transfer online if the registration has personalised or customised plates attached, and [TMR's online transfer page](https://www.qld.gov.au/transport/registration/transfer/online) lists the other cases that have to be done in person.

In person, buyer and seller both sign the vehicle registration transfer application (F3520). The buyer lodges Part A and the seller keeps Part B. TMR recommends sellers fill in Part B on the day of sale even when the transfer happens online. Until it's finalised, the seller stays liable for tolls and infringement notices on the trailer.

The boat transfer is separate, on its own form (F3521), or online if you're eligible. Bought from interstate? A Queensland registration can't be transferred to another state, or the other way, so you'd register the trailer here as new.

Lights and plates: a lit rear number plate that nothing covers

TMR's towing page is plain about the plate: the trailer must have a lit rear number plate that isn't blocked by accessories such as bicycle racks. And when the trailer's unhooked, the towbar and coupling mustn't cover your car's number plate or rear lights. A removable tow coupling solves that, and it's one less thing to bark your shins on.

Your car also needs the right gear for the trailer: a towbar and coupling of a suitable type and capacity, an electrical socket for the trailer lights, brake connections if the trailer needs them, and extra mirrors for a large trailer if required.

Lights are part of the safety certificate inspection, so a trailer of 751 to 4,500kg ATM needs working lights to pass when it's sold. The TMR pages we checked don't say trailer lights must be submersible. Boat trailers do get backed into salt water, though, so ask your inspection station or trailer supplier what will last.

Towing an unregistered trailer home? Take off any old number plate first. An unregistered vehicle permit covers the trip, and the driver of the towing vehicle has to carry it.

Towing your boat on the road: check the weight, then drive for the extra length

The driver is legally responsible for towing safely, and for making sure the car, the trailer and the couplings meet the minimum standards and loaded mass limits. Start with weight. Your car's owner's manual usually shows its maximum towing weight, and you shouldn't go over it. TMR points out that a boat trailer's load can include fishing gear, safety equipment, the boat motor and fuel. If you're unsure of the total, get the rig weighed at a public weighbridge.

You can tow only one trailer at a time, and nobody can ride in it. On the road, TMR's advice for trailers is to:

- leave a bigger gap to the car ahead, and more again in poor conditions - allow for the trailer cutting in on corners - use a lower gear going downhill - expect the rig to sway when a heavy vehicle overtakes you

Before a trip, get the wheel bearings, suspension and brakes checked. TMR says that's particularly important for a boat trailer, or one that's sat unused for a while. A trailer that's overloaded, unroadworthy or not compliant may not be covered by comprehensive insurance.

Rego sorted? Whoever drives the boat still needs a licence

Trailer rego gets the rig down the road, and boat rego covers the hull on the water. Neither one says who's allowed to drive the boat. That's your recreational marine licence, a third thing again. Our guide to whether you need a boat licence in Queensland covers the engine power and age rules, and how to get a QLD boat licence walks through the steps.

Our Boat Licence course is priced from $329, with online theory included and all equipment provided. Courses run on sheltered Sunshine Coast water at Golden Beach in Caloundra, Maroochydore and Noosaville. If a jet ski is going on a trailer too, the Boat & Jet Ski Combo covers both licence courses in one day. Pick a date that suits on the course dates page, before the new rig's first trip.