Northern Territory Diesel Tops the Nation at 304 Cents While the Darwin to Outback Spread Hits 253 Cents
A comprehensive analysis of Thursday's fuel pricing data, captured at 8:02am ACST on the 30th April 2026, reveals the Northern Territory once again sits at the top of the national diesel ladder, with a statewide average of 304.0 cents per litre across 159 stations. That figure puts the Territory 34.2 cents above the Australian Capital Territory average of 269.8 cents and a substantial 50.9 cents above Western Australia, the cheapest mainland state for diesel at 253.1 cents.
Drilling down into the specifics, the spread within the Territory itself tells the more interesting story. NT diesel ranges from a low of 146.1 cents at the cheapest pump to 399.0 cents at the most expensive, a difference of 252.9 cents that dwarfs every other state. By comparison, South Australia sits in second place for spread at 250.0 cents, while Tasmania reports the tightest range nationally at just 99.2 cents across its 43 stations.
Industry factors explain a lot of this. The Territory operates with a regulated pricing framework that publishes locked retail prices for the next 24 hour cycle, a structure absent from the mainland. That mechanism produces sharper headline movements than motorists in New South Wales or Victoria typically see, and it means the gap between Darwin metro forecourts and remote outback service stations can swing meaningfully from one cycle to the next.
Darwin accounts for the bulk of the cheaper end of the NT distribution. Residents in the capital benefit from fuel terminal proximity, competition between several brands and the regional supply chain that also feeds northern Queensland ports. Once a motorist heads south along the Stuart Highway, however, the picture changes quickly. Stations between Katherine, Tennant Creek and Alice Springs routinely add 30 to 60 cents per litre on top of Darwin pricing, and the most remote outposts pushing toward the upper bound of 399.0 cents reflect freight cost, refuelling cycles and limited delivery options for the diesel road trains that service the cattle industry.
Breaking down the regional differences nationally, the Territory now sits roughly 47.4 cents above the average of the seven other states and territories. NT at 304.0 cents, ACT at 269.8 cents, Tasmania at 263.4 cents, South Australia at 260.8 cents, Queensland at 260.5 cents, New South Wales at 258.0 cents, Victoria at 254.6 cents and Western Australia at 253.1 cents. The mainland diesel band is unusually tight at the moment, sitting within 7.7 cents from cheapest to most expensive once the Territory is removed from the comparison.
Historical comparison shows this gap is not new. Northern Territory diesel has consistently led the country since the start of the year, driven by long haul freight requirements, high pump volumes for mining and pastoral operations and a smaller competitive set than the eastern seaboard markets. Industry data confirms the 159 NT diesel stations make up less than four percent of the national mainland count, even as they cover the largest geographic footprint of any state or territory.
The data paints a clear picture for motorists planning long distance travel. Filling up in Darwin before heading inland delivers meaningful savings. At the lower end of the Territory range, around 240 to 250 cents, drivers will pay roughly the same as a Queensland or South Australia regional centre. Wait until Tennant Creek or further south on a long run and the bill climbs significantly.
Cross referencing with neighbouring states tells the same story in reverse. A truck running from Queensland into the Territory faces a step up of around 43.5 cents per litre on average. A driver heading west from the Territory into Western Australia encounters a 50.9 cent reduction at the border, one of the largest interstate diesel transitions in the country. This pattern is consistent with what we have seen in past data captures, where remote and regulated markets behave differently from the deregulated mainland.
Unleaded prices in NT, while not the focus of today's analysis, follow a broadly similar geographic pattern, with Darwin metro stations sitting noticeably below the territorial average and remote stations climbing well above it. Motorists driving petrol vehicles into the Territory should plan in the same way diesel drivers do, treating Darwin as the practical fill point before any push into the outback.
For motorists willing to plan their stops, the data clearly demonstrates that location and timing remain the two most important factors in fuel savings. The Northern Territory does not offer the cheapest diesel anywhere in Australia, but a careful read of the daily pricing data shows that the savings within the Territory itself can run into the tens of cents per litre for those who fill up in Darwin before pushing into the outback.
