Why Brisbane Drivers Pay 13 Cents More Than Perth and Nobody Will Fix It

Why Brisbane Drivers Pay 13 Cents More Than Perth and Nobody Will Fix It

If you filled up in Brisbane last week, you probably paid somewhere around 195 cents a litre for unleaded. Drive the same car into a Perth servo and you'd have paid about 181 cents. That's roughly $8 difference on a standard tank, or about $420 a year if you're filling up weekly. Same country, same fuel, same global oil price. So what gives?

The answer sits in one of the most fascinating and frustrating quirks of Australian fuel retailing: the price cycle. And right now, it's the subject of a slow motion regulatory battle that could reshape how every east coast motorist buys petrol.

The cycle that ate Brisbane

Every capital city except Canberra, Hobart and Darwin experiences some version of a petrol price cycle. Prices shoot up suddenly, then drift down gradually over days or weeks before the whole thing repeats. It's been happening since the 1970s, back when everyone got paid cash on a Thursday and immediately filled up the tank. Service stations figured out they could charge more on paydays and discount midweek when demand dropped.

But here's what's changed. In 2010, Brisbane's cycle ran about seven days. You'd see a spike, prices would fall, and within a week you'd get another crack at cheap fuel. Roughly 52 chances a year to fill up at the bottom.

Fast forward to now and the RACQ's research paints a starkly different picture. Greater Brisbane's average fuel price cycle has blown out to 42 days. That's six times longer than it was just over a decade ago. Instead of 52 cheap fill up windows a year, Brisbane motorists are looking at maybe nine.

And it gets worse. Last year, Brisbane endured a 95 day price cycle. Three solid months. RACQ economist Dr Ian Jeffreys called it unprecedented. "We have never seen a cycle last three months," he said. During that marathon stretch, gross retail margins exceeded 25 cents per litre on 39 of those days. Only three days qualified as genuinely cheap.

Meanwhile, in Perth

Contrast that with what happened in Perth during the same 95 day window: one expensive day and 38 cheap ones. At least one bargain day every single week. Average retail margins in Perth sat at 11.1 cents per litre, less than half of Brisbane's 22.2 cents.

Perth isn't some magical exception to market forces. It has something the eastern states don't: FuelWatch.

Introduced in January 2001 by the Western Australian government, FuelWatch requires every fuel retailer in the state to submit their next day's prices by 2pm. Those prices then lock in from 6am the following morning and can't change for 24 hours. No sneaky midday spikes. No filling up at 152 cents and watching the bloke at the next bowser cop 168 cents an hour later.

The transparency is what makes it work. WA motorists can check tomorrow's prices tonight and plan accordingly. The locked in pricing eliminates the within day volatility that drives people mad in Sydney, Melbourne and Brisbane. And because retailers know everyone can see what everyone else is charging, competition stays sharper.

The result? Perth has consistently ranked as one of Australia's cheapest capital cities for fuel. Last year, motorists there paid an average of 13 cents per litre less than Brisbane drivers for regular unleaded.

The NRMA weighs in

It's not just a Queensland gripe. The NRMA has been hammering this issue nationally, pointing out that the prolonged high price cycles in Brisbane, Sydney and Melbourne are hurting families and dragging on the broader economy.

NRMA spokesperson Peter Khoury put it bluntly: "The longer the cycles, the more exposed to the higher prices motorists become, and it has led to another year of unnecessary pain at the bowser."

The NRMA's own data shows Canberra topping the price charts at 196.3 cents per litre, with Brisbane second at 195 cents. Sydney and Melbourne trail at 191.1 and 190.3 cents respectively. The motoring group reckons these disparities cost the average east coast family an additional $426 a year compared to families in Western Australia.

They've called on the Federal Government to direct the ACCC to properly investigate the lengthening cycles. The ACCC, for its part, got a fresh five year monitoring mandate starting January 2026, extending its fuel oversight through to 2030. But monitoring and actually doing something about it are two very different things.

Queensland's slow dance with regulation

This is where the story gets properly interesting. The RACQ has done more than just complain. Their policy team spent months analysing three decades of fuel company pricing data and came up with a specific proposal: cap daily fuel price increases at 5 cents per litre.

The logic is straightforward. Right now, retailers can hike prices by 30 to 50 cents overnight. You go to bed with fuel at 165 cents, wake up to 205 cents, and there's nothing you can do about it. Under the RACQ's proposal, prices could only climb 5 cents per day. The hike would still happen, but it would be visible and gradual. You'd see it coming and have time to fill up before it peaked.

RACQ modelling suggests this would shorten and flatten the entire cycle, giving drivers more frequent windows of cheaper fuel rather than the current feast or famine pattern.

Queensland Premier David Crisafulli acknowledged the proposal over a year ago, saying he'd asked his cabinet to examine different models including what's in place in Perth. "There are mixed reports about how effective that is, but it's something that we owe to Queenslanders to look at," he said.

That was in early 2025. As of February 2026, Queensland still has no fuel price regulation. The 5 cent cap remains a proposal. The government says it's still reviewing. Meanwhile, the RACQ's latest analysis shows Brisbane's retail margins continue to surge, with Dr Michael Kane noting they're "far too high compared to other parts of the country."

Opposition transport spokesman Bart Mellish hasn't been shy about pointing out the delay: "We've had over six months to look at this proposal."

The industry pushback

Not everyone thinks regulation is the answer. The Australasian Convenience and Petroleum Marketers Association has pushed back hard, arguing that price cycles are a natural outcome of market competition between discount and premium retailers. They've accused the RACQ of misunderstanding how fuel markets operate.

There's also a legitimate question about whether FuelWatch style regulation could hurt independent operators. A Queensland parliamentary committee previously concluded that FuelWatch had negatively impacted independent fuel retailers in WA, though the evidence on that point is contested.

And when Canberra tried to roll out FuelWatch nationally back in 2008, the Senate voted it down. The political appetite for fuel price regulation has historically been, to put it politely, limited.

What this means for your wallet

So where does this leave the average motorist in Brisbane, Sydney or Melbourne?

Right now, the practical advice hasn't changed much. Track the price cycle using apps. Fill up at the bottom. Avoid the peak. But that advice only works when cycles are predictable. When a cycle stretches to 95 days, good luck timing your fill up.

The real question is whether any government, state or federal, has the appetite to do what WA did 25 years ago. Perth's fuel market isn't perfect, but its motorists pay less, get more transparency, and don't have to play guessing games about whether prices will jump 40 cents while they're eating breakfast.

The ACCC's extended monitoring mandate through 2030 is welcome. Quarterly reports are useful. But Queensland drivers staring down another year of 40 day cycles and bloated margins can be forgiven for wanting something a bit more concrete than a report every three months.

The fuel industry rarely makes headlines until prices spike, but what's happening with these lengthening cycles is a structural shift that's quietly costing east coast families hundreds of dollars a year. Whether Perth's model is the right fix for Brisbane, or whether some other approach works better, the one thing that's clear is that the current hands off approach isn't working. And the longer governments take to act, the more motorists pay for the indecision.

Keep an eye on Queensland in particular over the coming months. If Crisafulli's government finally moves on regulation, it could trigger a domino effect across the eastern states. If they don't, expect the pressure from motoring groups to keep building. Either way, this is one fuel story that's going to keep burning.