Canberra Diesel Sits Within 13 Cents Across Every Servo While NSW Lifts 16.6 in a Day
The number that caught my eye this afternoon is 13.0, and it is a gap rather than a price. As of 27th Aug 2026 2:05pm AEST, the difference between the cheapest and the dearest diesel servo in the Australian Capital Territory is 13.0 cents. Across the border in NSW, the same gap runs to 141.5 cents. Canberra motorists are filling up in the most uniform fuel market in the country, and that is most of the reason shopping around in the capital so rarely pays.
Every ACT servo inside a 13 cent band
Across 38 ACT diesel sites, the cheapest litre sits at 250.9 and the dearest at 263.9, for a territory average of 261.0. The daily move was 0.6 cents down, the smallest shift of any Australian jurisdiction in today's data.
Set that against the rest of the country and the contrast is substantial. Victoria lifted 1.2 cents to 254.5, Queensland added 0.3 to 255.5, South Australia rose 2.8 to 257.5 and Western Australia climbed 9.8 to 256.7. NSW moved 16.6 cents. The ACT effectively stood still.
The 16.6 cent day next door
NSW diesel lifted from 237.5 to 254.1 across 1,274 stations, the largest single day increase of any Australian state in today's figures. NSW also carries a far bigger station count and a much longer run of remote highway, which stretches both ends of its range: a low of 194.5 and a high of 336.0. Suburb averages give a fairer read than the extremes do.
Even after that lift, the NSW average of 254.1 sits 6.9 cents below the ACT average of 261.0. Canberra never had to rise to become expensive. It simply never came down.
The Monaro detour
The cheapest diesel available anywhere in the ACT is 250.9. Head south into the Monaro and Dairymans Plains is showing a low of 237.9 across three sites, with a local average of 244.2. That low is 13.0 cents under Canberra's cheapest litre, the same 13.0 cents that separates the capital's cheapest servo from its dearest.
Oberon reads much the same to the north, averaging 241.2 across four sites with a low of 237.9. The cheapest diesel suburb in the country today is Bomaderry on the South Coast at 224.9, with a four station average of 237.2. For a Canberra driver already heading to the coast or the snow, the fill up is worth timing to the trip rather than to the tank light. Our savings calculator puts a figure on that difference for your own weekly distance.
Only the Territory sits higher
The one jurisdiction dearer than the ACT is the Northern Territory, averaging 292.1 across 178 sites. Its range is the widest in the country by a distance, running from 204.2 to 420.0, a spread of 215.8 cents. The two markets are nothing alike. The ACT is uniformly expensive with almost no variation, while the NT pairs competitive Darwin pricing with remote highway sites carrying substantial freight costs. NT prices also move under the NT 24 hour price lock, which holds a posted price for a full day.
What an active cycle looks like
Queensland unleaded is doing exactly what the ACT is not. Goodna unleaded rose 16.1 cents to 207.0 across five sites while Pimpama fell 14.9 cents to 201.0 across six, same state and same day, in opposite directions. That is a working price cycle, and it is what gives motorists a reason to wait a few days. Current levels for both fuels sit on our unleaded petrol prices and diesel prices pages.
What the numbers mean for your next fill
The usual advice does not travel well to Canberra. In most capitals the saving comes from picking the right servo, but every ACT site lands between 250.9 and 263.9, so the whole territory is priced within 13.0 cents of itself and driving three suburbs across wins back very little. The territory average of 261.0 is the second highest jurisdiction average in Australia, and it got there by holding still, moving 0.6 cents on a day when NSW moved 16.6.
The numbers are clear: for a Canberra diesel driver the saving sits at the border rather than inside it, with regional NSW inside a two hour drive running roughly 13 cents cheaper at the bottom end.
