# When do fuel stations change their prices in Tasmania?

Window: Jun 26, 2026 – Sep 23, 2026 · 90 days · rebuilt every night

- A station in Tasmania changes its Unleaded (ULP) price 4.89 times a week on average, and a price that has just changed then holds for 1 day before the next one.
- On an ordinary day 97.8% of the stations in Tasmania change their price; on the busiest day of the window, 100.0%.
- The busiest weekday is Wednesday, with 19.0% of all changes; the quietest is Sunday, with 3.5%.
- An increase moves the price by 0.014 AUD/L on average, a cut by 0.007 AUD/L. Over the window there were 10 039 changes upward and 4 080 downward.
- Half of all the price changes of the last 72 days happened on just 27 of them.
- When United moves, 100% of its own stations move on the same day — the price of a station in this network is not set at the station.
- Tas Petroleum reaches the centre of a market-wide move first in 2 of the 4 waves we measured; the rest follow at a median of 0.0 days.
- Across the window the market median went from 1.081 AUD/L to 1.513 AUD/L.

## Unleaded (ULP)

- Changes per station: 4.89 / week
- A price holds for: 1 day
- Stations: 277 · 14 119 price changes

| Which weekday | increase | cut |
|---|---:|---:|
| Monday | 907 | 90 |
| Tuesday | 1 967 | 590 |
| Wednesday | 1 557 | 1 129 |
| Thursday | 1 679 | 875 |
| Friday | 1 567 | 1 054 |
| Saturday | 1 939 | 274 |
| Sunday | 423 | 68 |

- increase: 0.014 AUD/L (n=10 039)
- cut: 0.007 AUD/L (n=4 080)

| Network | Stations | Changes / station / week | Together | Behind the first mover |
|---|---:|---:|---:|---:|
| Tas Petroleum | 21 | 4.69 | 91% | 0.01 d |
| Ampol | 58 | 4.84 | 95% | 0.02 d |
| United | 35 | 5.23 | 100% | 0.02 d |
| BP | 28 | 4.92 | 96% | 0.05 d |
| Independent | 44 | 4.57 | 98% | 0.10 d |

## Diesel

- Changes per station: 4.91 / week
- A price holds for: 1 day
- Stations: 229 · 11 724 price changes

| Which weekday | increase | cut |
|---|---:|---:|
| Monday | 766 | 63 |
| Tuesday | 1 642 | 473 |
| Wednesday | 1 350 | 921 |
| Thursday | 1 398 | 761 |
| Friday | 1 317 | 828 |
| Saturday | 1 620 | 201 |
| Sunday | 338 | 46 |

- increase: 0.018 AUD/L (n=8 431)
- cut: 0.007 AUD/L (n=3 293)

| Network | Stations | Changes / station / week | Together | Behind the first mover |
|---|---:|---:|---:|---:|
| Tas Petroleum | 25 | 4.89 | 92% | first |
| United | 38 | 5.18 | 100% | 0.02 d |
| Ampol | 41 | 4.75 | 95% | 0.08 d |
| Independent | 42 | 4.69 | 98% | 0.23 d |

## How this was measured

One price per station per day. The daily history table holds one row per station, fuel and day. A row is also written back to the date the source itself gives as the moment of the change, so a change lands on the day the operator made it, not on the day we happened to read it.
A change is two consecutive days in a station’s series with different prices; it is counted on the second of the two. If more than 3 days separate the two readings, the pair is dropped — there is no way to say which day the price moved.
A market-wide move — a “wave” — is a run of days on which at least 99% of the stations with a price changed it; the threshold is not a fixed number but the market’s own median plus half the way to its 95th percentile. Within a wave each network gets the centre of gravity of its own changes; the network whose centre falls earliest moved first. Waves found in this window: 4.
The figures are rebuilt once a night from the full history, not on every visit.

## What this cannot tell you

At most one change per station per day is visible, because the history keeps one price per station per day. A station that changes twice in one day is counted once.
It cannot be established for Tasmania. Our history keeps one price per station per day, so we know the day a price changed but not the hour. Nothing on this page claims otherwise.

Source of the prices: FuelCheck TAS open data (Tasmania, CC BY 4.0). Analysis: fuel-prices.eu.

Live fuel prices in %s: https://www.fuel-prices.eu/live/australia/tasmania/

HTML: https://www.fuel-prices.eu/live/australia/tasmania/price-changes/
JSON: https://www.fuel-prices.eu/live/australia/tasmania/price-changes/data.json