• 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 2019.

    Combined residential/business
      Tariff     Charges
    Previous
    1 July 2018
    Current
    1 July 2019
    K1 & K2
        Supply charge - per day $1.7154 $1.7686
        Electricity charge - cents per unit for:
        First 20 units per day  28.3272 29.2053
        20-1650 units per day  26.6946 27.5221
        More than 1650 units per day  30.0972 31.0302

    Small business tariff (non-contestable)
    Tariff     Charges
    Previous
    1 July 2018
    Current
    1 July 2019
    L1 & L2
     
        Supply charge - per day $1.7154 $1.7789
        Electricity charge - cents per unit for:
        First 1650 units per day  26.6946 27.6823
        More than 1650 units per day 30.0972 31.2108

    Small business tariff (contestable)
    Tariff     Charges
    Previous
    1 July 2018
    Current
    1 July 2019
    L3 & L4
     
        Supply charge - per day $0.5574 $1.9181
        Electricity charge - cents per unit for:
        First 1650 units per day  36.6265 38.9608
        More than 1650 units per day 33.0594 33.0594

    Small business time-of-use tariff (contestable)
    Tariff     Charges
    Previous
    1 July 2018
    Current
    1 July 2019
    R1
     
        Supply charge - per day $3.3090 $3.3785
        Electricity charge
        Peak charge rate - cents per unit 35.8882 36.6419
        Off-peak charge rate - cents per unit 10.7665 10.9926

    Small business time-of-use tariff (contestable)
    Tariff     Charges
    Previous
    1 July 2018
    Current
    1 July 2019
    R3
     
        Supply charge - per day $2.8126 $3.6155
        Electricity charge
        Peak charge rate - cents per unit 49.2442 52.7370
        Off-peak charge rate - cents per unit 15.1600 15.8422

    Related links

    Last reviewed: 1 July 2019

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