The Cheap Fuel Experiment Is Over: What the Excise Return Costs You

Sometime after midnight on Sunday 3 August, every litre of petrol in Australia became 16 cents dearer to tax. There was no announcement that night and no countdown clock on the news. It was simply the scheduled end of the biggest fuel tax cut in Australian history, and if you've filled up this week, you've already started paying for it.

The tax that came back bigger than it left

Here's what's really going on. Back in late February, conflict in the Middle East sent global oil prices surging from around US$72 a barrel to more than US$96. Pump prices followed within weeks, and on 30 March the federal government announced it would halve the 52.6 cent per litre fuel excise from 1 April, relief worth about 32 cents a litre all up once flow through effects were counted.

That discount was never permanent, and it's been unwound in two stages. On 1 July the relief was halved to 16 cents. On 2 August the rest of it expired. From 3 August, the full excise applies again at 53.7 cents per litre.

Sharp eyed readers will spot something odd in that number. The excise was 52.6 cents when it was cut, yet it returned at 53.7. The reason is that excise is indexed to inflation twice a year, in February and August, and this month's adjustment quietly added 1.1 cents while the discount was still winding down. The tax didn't just come back. It came back bigger than it left.

The competition watchdog is watching the return closely. The ACCC has published weekly fuel price reports since the crisis began, 22 of them so far, and a ministerial direction requires it to keep going until at least 30 September. Commissioner Anna Brakey put retailers on notice in June: "The ACCC expects that fuel retailers will not attempt to take advantage of this increase in excise." She warned the regulator would act on false or misleading claims about price movements.

We've been here before

If this feels familiar, it should. In March 2022 the Morrison government halved the excise from 44.2 cents to 22.1 cents after Russia's invasion of Ukraine sent prices soaring. That cut ran for six months and cost the budget roughly $3 billion. When it ended in September 2022, the ACCC ran the same playbook it's running now, checking that the tax returned gradually through normal price cycles rather than becoming cover for a margin grab.

And 2022 taught us something useful: the restoration doesn't hit every servo at once. Because most capital cities run on price cycles, the extra tax flowed through over a week or two as stations reset their boards. Some lifted prices the same day. Others were still selling fuel bought at the old excise rate and held off. The same thing is happening now, which is why the ACCC's 7 August report described prices as having increased "to some extent" rather than by the full 16 cents everywhere.

The deeper history is a ripper too. John Howard froze excise indexation in 2001 after a voter backlash over petrol prices, and the rate sat at 38.14 cents for 13 years until indexation returned in 2014. Without that freeze, today's excise would be well north of 53.7 cents. And a piece of trivia for your next barbecue: GST is charged on the full pump price, excise included, which means Australian motorists pay a tax on a tax with every fill.

Still cheap by world standards, cold comfort here

Let's put this in perspective. Even at 53.7 cents, Australia taxes fuel lightly compared with most of the developed world. British motorists pay fuel duty of nearly 53 pence a litre, about a dollar in our money, with 20 per cent VAT stacked on top. Across much of Western Europe, tax makes up half or more of the pump price. The United States goes the other way entirely, with a federal petrol tax worth roughly 7 Australian cents a litre that hasn't moved since 1993.

That comparison won't make anyone feel better at the bowser. The ACCC's last full weekly readout before the final excise step, covering the week to 29 July, had capital city petrol averaging 193.6 cents and diesel at 232.8. Add 16 cents to that petrol figure and plenty of suburbs across Sydney, Melbourne and Brisbane are looking at sustained prices above $2 a litre. Economists at NAB reckon this isn't a blip either, warning the fuel cost shock is shaping up as something "more grinding and protracted" than a single spike.

What it means for your wallet

The practical upshot is easy to calculate. Sixteen cents a litre on a 60 litre tank is $9.60 every time you fill up. Compare this week with autumn, when the full discount was in place, and you're paying roughly $19 more per tank for exactly the same fuel.

Timing matters more than usual right now. While the excise flows through unevenly and cycles reset, the gap between the cheapest and dearest servo in the same city is unusually wide. Checking unleaded petrol prices before you drive past three stations to reach the cheap one is worth real money this month. In Perth, where the market resets weekly and Tuesday is usually the cheap day, buying on the wrong day can cost you another 20 cents a litre on top of the new tax. Adelaide runs a similar cycle lottery, while Canberra drivers see flatter pricing but rarely a bargain.

Diesel drivers cop the same 16 cent rise on fuel that already blew past 230 cents in July. Anyone running a ute or truck should keep a close eye on diesel prices, especially with the ACCC still running a separate investigation, opened back in March, into claims diesel availability was restricted in parts of regional and rural Australia.

Regional motorists do get one small mercy. Country prices move slower in both directions, so the full excise may take another week or two to land on price boards outside the capitals.

The bigger picture

Behind the scenes, the real conversation in Canberra isn't about this restoration at all. It's about how long fuel excise can keep doing its job. The tax raises serious revenue for the budget, yet every electric vehicle sold shrinks the base it's collected from, and this year proved how politically tempting it is to switch the tax off whenever prices spike. Once a government has cut fuel tax twice in four years during a crisis, motorists will expect it in the next one too.

There's also the question of whether any relief returns. Some forecasters have year end petrol averaging anywhere between $1.78 and $1.98 a litre, and the wide range mostly reflects one unknown: whether the government blinks before the next budget. With the ACCC reporting weekly until the end of September, fuel prices will stay in the headlines through spring.

The takeaways

The fuel industry rarely makes headlines until prices jump, but this rise was written into the calendar months ago. The motorists who'll wear it worst are the ones who fill up on autopilot. Don't be one of them.