Why Your Servo Got a Warning Letter From the ACCC Last Week

Something unusual landed in the inboxes of Australia's fuel retailers late last month. A letter from the competition watchdog, politely but firmly reminding them that the return of fuel excise on 1 July was not an invitation to pad the margins. Here's what's really going on, and why the next four weeks at your local servo will be among the most closely watched in years.

The letter, and why it went out

First, the mechanics. Back on 1 April, the federal government slashed fuel excise by 32 cents a litre as an emergency response to the supply crisis that followed the Middle East conflict. That full discount ended on 30 June. From 1 July, half of it came back. The excise cut now sits at 16 cents a litre, and it stays there until 2 August, when the remaining relief is scheduled to disappear altogether.

According to the ACCC, the partial restoration, once GST is added on top, could add up to 17.6 cents per litre at the pump. That's the theoretical ceiling. The real question, and the reason the watchdog put pen to paper, is whether servos add exactly that or quietly slip in a little extra while motorists are already braced for a rise.

The regulator isn't being subtle about its intentions. "We will not hesitate to take action if retailers make false or misleading statements about price movements," ACCC Commissioner Anna Brakey said, adding that the commission would also act on any evidence of anticompetitive behaviour. Since March, when the crisis hit, the ACCC has been publishing weekly fuel price monitoring reports instead of its usual quarterly ones. Report number seventeen, released on 3 July, contains the first hard data on what retailers actually did when the tax came back.

What actually happened on day one

Here's where it gets interesting. Across the five largest cities, Sydney, Melbourne, Brisbane, Adelaide and Perth, average petrol went from 151.5 cents a litre on 30 June to 158.1 cents on 1 July. Diesel rose from 173.5 to 179.1.

Run the arithmetic and that's an increase of 6.6 cents for petrol and 5.6 cents for diesel. Against a possible 17.6 cent jump, retailers passed through roughly a third on the first day.

Regional Australia told a similar story. Across the 190 or so locations the ACCC monitors outside the capitals, petrol averaged 171.8 cents and diesel 188.4 on 1 July. About 89 per cent of regional petrol sites lifted prices by up to 10 cents, and 84 per cent of diesel sites did much the same. Nobody, it seems, tried to bank the full whack overnight.

Why the softly softly approach? Fuel companies told the ACCC they would apply the higher excise at the wholesale level from 1 July but let it flow through to price boards "over time", as fuel bought at the cheaper rate works its way out of underground tanks and local competition allows. Worth remembering the contrast with April. When the cut arrived, most of the saving hit price boards within days. Cynics call this the rockets and feathers problem: prices rocket up when costs rise and drift down like feathers when they fall. This time the pattern has inverted, and you'd have to suspect the several thousand pairs of eyes at the commission have something to do with it.

We've run this experiment before

Going back a few years, Australia staged an almost identical dress rehearsal. In March 2022 the Morrison government halved fuel excise from 44.2 cents to 22.1 cents in response to the price shock from the war in Ukraine. When the full rate snapped back that September, the ACCC watched retailers closely and found the increase took a week or more to fully reach the pump, largely because stations were still selling fuel bought at the lower rate. No widespread gouging was ever established.

Compared to other countries, that's a decent record. When the United Kingdom trimmed fuel duty by 5 pence in 2022, the British competition authority later concluded that weakened competition among retailers meant motorists never saw the full benefit. Australia's advantage is transparency. Between government price schemes in most states and real time price apps, a servo that gets greedy is visible within the hour, not buried in a quarterly report.

The practical upshot for your wallet is this: history says the restoration will land in full, but gradually, and unevenly. Which creates opportunities.

What it means for you at the bowser

Because retailers are passing the increase through as their tanks turn over, the spread between the cheapest and dearest servo in your suburb is likely to widen over the next few weeks. A station that filled its tanks in late June can hold a lower board price longer than the one across the road that took delivery on 2 July. Shopping around matters more right now than it usually does, and it usually matters plenty.

The usual discounting cycles in the eastern capitals haven't gone anywhere either. Those regular swings of 20 to 40 cents in unleaded petrol prices dwarf the excise change itself, so timing your fill against the cycle remains the single biggest saving available. Our best time to fill up guide covers how the cycle runs in each city, and the price trends page shows where your city sits in the swing this week.

Diesel drivers have a slightly different calculus. Diesel prices don't cycle the way petrol does, so the excise restoration will show up as a steadier creep rather than a jagged sawtooth. Regional motorists in Queensland and Western Australia, where diesel utes do the heavy lifting, should expect the full flow through by late July.

And keep 2 August circled on the calendar. That's when the final 16 cents of relief is due to vanish, and with GST it means another rise of up to 17.6 cents. If the tank's half empty on 1 August, fill it.

The bigger picture

What most people don't realise is how much the machinery of fuel price scrutiny has changed this year. Weekly public monitoring, direct warning letters to retailers, named commissioners fronting the press: this is a long way from the sleepy quarterly reports of years past. Whether the ACCC keeps the weekly cadence once the crisis machinery winds down is an open question, but transparency has been the quiet winner of 2026. Supply, for what it's worth, looks steadier too, with the Geelong refinery back above 90 per cent of normal capacity and national fuel stocks sitting above average levels.

The takeaways worth keeping in mind:

The fuel excise story rarely makes the front page between Budget nights, but for the next month every servo price board in the country is effectively a live test of whether a watchdog with a weekly megaphone can keep a market honest. So far, the early evidence says yes. Keep an eye on this space.