• Electricity pricing 

    Retailers

    Electricity consumers in Western Australia fall into two general categories, contestable and non-contestable customers. Contestable customers have a choice of electricity retailer, while non-contestable customers do not.

    Find out about which electricity retailers you can use in the Economic Regulation Authority’s guide:

    Non-contestable customers

    Non-contestable customers are customers within the South West Interconnected System consuming less than or equal to 50 megawatt hours of electricity a year (an average of 137 units per day). 

    These customers are supplied by Synergy and pay electricity prices regulated by the Western Australian Government as determined under electricity by-laws.

    Residential households and small businesses usually fall within this category.

    Contestable customers

    Contestable customers are customers within the South West Interconnected System consuming more than 50 megawatt hours of electricity a year (an average of 137 units per day). These include  

    • small to medium sized businesses
    • large businesses.

    All customers outside of the South West Interconnected System are contestable and can choose their retailer. Customers should be aware that, at present, Horizon Power is the only retailer in many regional areas.

    These customers can negotiate the rates they pay with their chosen retailer.

    Customers consuming between 50 and 160 megawatt hours per year can choose to either pay the relevant capped tariff offered by Synergy or be supplied by Synergy or another retailer at negotiated prices.

    On sellers

    Electricity prices determined by the State Government

    The Western Australian Government regulates Synergy’s and Horizon Power's electricity prices in line with the following electricity by-laws:

    This means that Horizon Power and Synergy must make the regulated price available to their small use customers and some larger customers. 

    The electricity tariff by-laws set out the fees and charges Synergy and Horizon Power may charge during the course of supplying electricity to customers. Changes to electricity tariffs, fees and charges are considered by the Western Australian Government annually as part of the State Budget process. 

    Uniform Tariff Policy

    The Uniform Tariff Policy means that small use Synergy and Horizon Power customers are all charged the same rate. This includes customers in remote regions, where the costs to supply electricity are considerably higher.

    The extra costs of supplying electricity to these areas are funded by: 

    • the Tariff Equalisation Contribution through  electricity network charges in the South West Interconnected System (SWIS)
    • the Western Australian Government subsidy. 

    Small to medium business*

    Prices apply from 1 July 2018.

    Combined residential/business
      Tariff     Charges
    Current
    1 July 2018
    Previous
    1 July 2017
    K1 & K2
        Supply charge - cents per day 171.54 53.8864
        Electricity charge - cents per unit for:
        First 20 units per day  28.3272 29.3544
        20-1650 units per day  26.6946 33.6081
        More than 1650 units per day  30.0972 30.3260

    Small business tariff (non-contestable)
    Tariff     Charges
    Current
    1 July 2018
    Previous
    1 July 2017
    L1 & L2
     
        Supply charge - cents per day 171.54 50.7504
        Electricity charge - cents per unit for:
        First 1650 units per day  26.6946 33.3546
        More than 1650 units per day 30.0972 30.0972

    Small business tariff (contestable)
    Tariff     Charges
    Current
    1 July 2018
    Previous
    1 July 2017
    L3 & L4
     
        Supply charge - cents per day 55.7410 53.7522
        Electricity charge - cents per unit for:
        First 1650 units per day  36.6265 35.3197
        More than 1650 units per day 33.0594 31.8798

    Small business time-of-use tariff (contestable)
    Tariff     Charges
    Current
    1 July 2018
    Previous
    1 July 2017
    R1
     
        Supply charge - per day $3.3090 $2.0964
        Electricity charge
        Peak charge rate - cents per unit 35.8882 36.7981
        Off-peak charge rate - cents per unit 10.7665 11.3493

    Small business time-of-use tariff (contestable)
    Tariff     Charges
    Current
    1 July 2018
    Previous
    1 July 2017
    R3
     
        Supply charge - per day $2.8126 $2.6660
        Electricity charge
        Peak charge rate - cents per unit 49.2442 46.6770
        Off-peak charge rate - cents per unit 15.1600 14.3697

    Related links

    Last reviewed: 27 June 2018

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