It's one of the most common questions Australian dog owners ask, and the answer is less straightforward than you'd hope — because it sits across two different sets of law.
Road rules and animal welfare legislation differ by state and territory, and they change. Treat this as a starting point and check the current rules with your state's transport authority or RSPCA before relying on it.
The two ways you can be penalised
1. Driving without proper control
Every Australian state and territory has a road rule requiring a driver to have proper control of the vehicle. A dog on your lap, under the pedals, or climbing between seats falls foul of this, and it's the rule most commonly applied to unrestrained pets. Penalties typically involve a fine and, in some jurisdictions, demerit points.
2. Animal welfare law
Separately, animal cruelty legislation in most states makes it an offence to transport an animal in a way likely to cause injury. The clearest example is a dog loose on an open ute tray — which is specifically regulated in several states and carries its own penalties.
So even where no rule says the words "your dog must wear a harness", an unrestrained dog can still put you on the wrong side of both frameworks.
The physics nobody thinks about
The legal argument tends to convince people less than this one does.
In a crash, an unrestrained body keeps moving at the speed the car was travelling. A 10kg dog in a 50km/h collision hits whatever's in front of it with roughly the force of a 300kg impact. That's lethal for the dog and genuinely dangerous for everyone in the front seats.
Even without a crash: an emergency brake at suburban speed is enough to throw a small dog into a footwell or against a dashboard.
What counts as properly restrained
There are a few approaches, and they suit different dogs:
- Crash-tested harness attached to a seatbelt — best for medium and large dogs. Attach to a harness, never a collar; a collar attachment in a sudden stop can cause serious neck injury.
- Secured travel crate — very good for anxious dogs, provided the crate itself is anchored so it can't become a projectile.
- Booster seat with an internal tether — the usual choice for small dogs. It raises them to window height, which reduces motion sickness and anxiety, while the tether stops them roaming.
- Cargo barrier — suitable for larger dogs in wagons and SUVs.
Our co-driving seat takes the booster approach: it straps to the seat, has a built-in tether that clips to a harness, and gives small dogs the window view that keeps most of them settled.
Honest limitation worth knowing
Very few pet car restraints sold anywhere are independently crash-tested to a formal standard, and Australia has no mandatory certification for them. Most products — ours included — are best understood as travel restraints: they stop your dog roaming, distracting you, or being thrown around in ordinary driving and moderate braking. That's a real safety gain and it addresses the "proper control" rule. But no one should tell you a soft booster seat is equivalent to a crash-rated child seat, because it isn't.
If crash performance is your priority, look specifically for a harness that publishes independent crash-test results.
Getting a nervous dog used to it
- Set the restraint up in the car with the engine off and let them explore it with treats.
- Sit in the stationary car together for a few minutes.
- Do a very short drive that ends somewhere good — the park, not the vet.
- Build up gradually from there.
Most dogs settle within a week or two, particularly once they can see out the window.
The bottom line
Yes, an unrestrained dog can get you fined in every Australian state. But the more compelling reason is that restraint is the difference between a bad day and a catastrophic one — for your dog and for you.