How gas is priced in Western Australia
The WA Government sets maximum prices for small gas customers, those using less than one terajoule a year, on the main distribution systems: Perth from Gingin to Busselton, the Mid West and South West, Kalgoorlie-Boulder, Albany, Geraldton and Carnamah. The caps apply to standard form contracts; retailers can offer market contracts below them. They do not apply to the LPG networks in Margaret River, Leinster and Esperance, or to bottled gas.
| Area | Supply charge | Usage |
|---|---|---|
| Mid-West and South-West (including Perth) | 27.61c a day | First 12 units a day: 19.06c a unit; Over 12 units a day: 17.2c a unit |
| Kalgoorlie-Boulder | 62.12c a day | All units: 17.73c a unit |
| Albany | 29.8c a day | All units: 21.68c a unit |
Who runs WA's gas network
The pipes are run by ATCO Gas Australia. For gas leaks call ATCO on 13 13 52. The AER does not publish gas usage benchmarks for WA, so the table below uses example daily usage.
| Daily use | MJ a day | Yearly cost at the cap |
|---|---|---|
| 5 units | 18 | $449 |
| 10 units | 36 | $796 |
| 15 units | 54 | $1,124 |
| 20 units | 72 | $1,438 |
Retailers can offer market contracts priced below the caps, so ask for discounts off the standard tariff. If you think a retailer is charging above the regulated tariff, the Energy and Water Ombudsman WA can help.
Common questions
Yes, for small customers on standard contracts on the main networks. The WA Government sets maximum supply and usage charges each year.
WA bills charge per unit, where one unit is 3.6 MJ, the same energy as 1 kWh of electricity.
A supply charge of 27.61c a day, 19.06c a unit for the first 12 units a day and 17.2c a unit above that, as published by Energy Policy WA.
Sources
Maximum prices come from Energy Policy WA, as published for 2026-27. Last checked October 2026. Prices include GST unless we say otherwise.