Quick facts about energy providers in Western Australia
- Western Australia is split into two main regions, dividing the South West Interconnected System (SWIS) with the rest of the state.
- The energy market in Western Australia has not been fully deregulated and operates differently in the two regions.
- Most residential electricity customers are limited to a single electricity provider, Synergy.
- Many residents are able to choose their gas provider.
Compare electricity and gas in Western Australia
Note: Check the columns below for "electricity availability" and "gas availability".
Explained in further detail below, if you live in the south west, your power will be supplied by Synergy. If you live anywhere else in Western Australia, you will have to purchase energy from Horizon. Both providers will charge a set supply charge per day just to have you hooked up to the grid.
Horizon Energy uses a fixed price A2 tariff for all residential properties. This means you will pay a flat amount per unit of power you use.
If your building is part residential and part business, you may be subject to a K2 tariff, which changes the rate depending on how much electricity you've already used that day.
Synergy customers in Perth and the south west have access to two different tariff structures: a fixed rate or time of use.
The fixed rate tariff is the same system as that offered by Horizon, where you pay a set amount for every unit of power you use.
Under the time of rate tariff, the day is split up into three periods:
- Peak. 3pm–9pm weekdays, when most households are using power.
- Off-peak. 9pm–7am all week, when households are using the least electricity.
- Shoulder. All other times.
What tariff type should I go for?
Currently, Synergy's peak rates are nearly double the fixed rate, meaning that a time of use tariff may only be worth it if you use a great majority of your power during off-peak periods.
The energy market in Western Australia is divided into two regions, each of which has its own set of regulations. While there are a number of electricity retailers in the state, most residential customers are limited to a single provider.
Electricity prices in Western Australia are regulated by the state government and gas prices are regulated in the major metropolitan areas. How much you pay for your electricity in Western Australia depends largely on where you live.
Region 1: South West Interconnected System
Most people in Perth fall into the South West Interconnected System (SWIS). There are non-contestable customers and contestable customers.
Contestable customers can choose their energy retailer if they use more than 50 megawatt-hours of electricity per year. These customers can potentially negotiate lower rates than set by the government. However, this mostly applies to businesses.
Non-contestable customers (less than 50 megawatt-hours of electricity use per year) are supplied by Synergy.
The average household only consumes around six megawatt-hours of electricity per year, which means almost all residential customers are considered non-contestable.
Western Australian residents in the SWIS that use more than 50 megawatt-hours per year are able to choose their electricity retailer.
Region 2: Regional Western Australia
For customers outside the SWIS, Horizon Power is the only retail electricity provider.
Western Australia energy retailers
The following energy retailers operate in Western Australia:
Western Australian residents may be eligible for the following energy discounts:
- Energy Concession Extension Scheme (ECES)
- Hardship Utility Grant Scheme (HUGS)
Check if you're eligible for any rebates or concessions in Western Australia and learn how to apply
If you're a contestable customer or business owner in the SWIS, switching energy providers is relatively simple. All you have to do is find a new energy provider and contact the new provider to arrange the switch.
How to switch energy providers