Electricity and gas providers in Western Australia

Most residents of Western Australia can't choose their electricity providers, but they can switch gas suppliers.

The energy market in Western Australia, unlike most Australian states, has not been fully deregulated. Two companies sell most of Western Australia's domestic electricity: Synergy and Horizon Power. Which of the two sells you your electricity depends on where you live. For gas, on the other hand, Western Australians can choose between a number of providers including Alinta Energy, Kleenheat, AGL, Origin Energy and Perth Energy.

Who provides electricity in Western Australia?

The Western Australian electricity market is divided into the South West Interconnected System (SWIS), the North West Interconnected System (NWIS) and the Esperance System. Residents living within the SWIS have no choice in their energy retailer and must purchase electricity through Synergy. Outside the SWIS, customers are free to choose their energy retailer, although Horizon Power is currently the only retailer operating in many areas of the state.

  • Synergy. The energy provider for customers within the SWIS, Synergy is Western Australia’s largest provider of gas and electricity. The company provides energy to more than one million residential, business and industrial customers in the state. It also generates its own power from a range of sources, including renewables and plays an active role in the Western Australian community.
  • Horizon Power. Owned by the Western Australian state government, Horizon Power provides energy to residential customers outside the SWIS. Horizon Power is active in creating a more environmentally-friendly energy network and is working to generate more power from renewables and create a more efficient state.

Electricity pricing in Western Australia

As with your choice of energy retailer, how much you pay for your electricity in Western Australia depends largely on where you live. Residents within the SWIS who use less than 50 megawatt-hours of electricity a year are subject to government-regulated energy rates. Most households will not use more than 50 megawatt-hours a year and as such fall into this category.

WA residents using more than 50 megawatt-hours a year or those who live outside the SWIS have the ability to choose their electricity retailer and potentially negotiate lower rates than set by the government.

Government-regulated electricity rates

Prices last updated 7 August 2018

ChargeRegulated rate
Supply charge101.55c per day
Supply charge for additional homes40.3762c per day
Electricity charge28.3272c per unit
Hot water supply charge21.0903c per day
Hot water supply charge for additional homes21.0903c per day
Hot water electricity charge11.6511c per unit

Who provides gas in Western Australia?

Consumers in Western Australia have had a choice of gas provider since 2013. The two largest providers are Kleenheat and Alinta, but WA residents can also choose to buy their gas through AGL, Perth Energy or Origin Energy.

Western Australia gas plans and providers

Plans and pricing last updated 7 August 2018

ProviderPlans and pricesFeatures/benefits
Alinta EnergyFair Go 25

  • 25% off usage charges over 3 years

Fair Go 30

  • 30% off usage charges over 2 years

Fair Go 35

  • 35% off usage charges over 1 year
  • Online only
  • Online payment options
  • Bill smoothing available
  • Simplified fee system
  • No lock-in contracts
KleenheatMonthly Energiser

  • 35% off usage charges for first 12 months
  • 25% off usage charges for next 12 months
  • Pay in monthly instalments
  • Direct debit

Monthly smart saver plan

  • 20% off usage charges for 24 months
  • Pay in monthly instalments
  • Direct debit

Standard form contract

  • 12.5% off when you pay on time
  • Flexible payment choices
  • Quarterly bills
  • No fixed terms
  • No set-up costs
  • $50 gift card reward for select plans
AGLAGL Set and Forget™

  • 35% off usage charges for direct debit
  • 10,000 flybuys points for signing up online

AGL Savers™

  • 33% off usage charges for paying on time
  • 10,000 flybuys points for signing up online

AGL Fixed Rate

  • Flat rate fixed for two years
  • 10,000 flybuys points for signing up online
  • Flexible billing options
  • 24-month contract
  • No exit fees
  • AGL rewards program
Origin EnergyOrigin Maximiser

  • 35% off usage charges for 12 months
  • Direct debit only
  • Email bills only

Origin Saver

  • 33% off usage charges for 12 months when you pay on time
  • Flexible payment options

Bill Saver

  • 22% off supply and usage charges for up to 24 months
  • Flexible payment options
  • No exit fees
  • Online account management
Perth EnergyFamily Gas

  • Up to 25% off usage charges
  • Flat-rate pricing
  • Flexible contracts

Gas pricing in Western Australia

Gas pricing in Western Australia is regulated by the government, with a fixed cap preventing retailers from charging above a set price. Retailers can undercut this cap in an effort to beat out the competition, however, so it's worth shopping around to ensure you get the best deal.

In the tables below, you'll find the current government-regulated caps for gas pricing in different areas of Western Australia:

Prices last updated 7 August 2018

Mid-West/South-West WA

ChargeRegulated rate
Supply charge21.69c per day
First 12 units/day14.98c per unit
Over 12 units/day13.51c per unit


ChargeRegulated rate
Supply charge48.78c per day
Energy charge13.90c per unit


ChargeRegulated rate
Supply charge23.42c per day
Extra dwellings11.70c per day
Energy charge17.03c per unit

Frequently asked questions about WA energy

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Shirley Liu

Shirley Liu is a program manager at finder, formerly the publisher for Banking and Investments. She is passionate about helping people make an informed decision, save money and find the best deal for their needs.

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10 Responses

  1. Default Gravatar
    PeterNovember 14, 2018

    How is it that I used less power this bill compared to the last bill and yet my bill is double to the first. I am with Synergy.

    • Default Gravatar
      JoelNovember 14, 2018

      Hi Peter,

      Thanks for leaving a question on finder.

      I suggest that you clarify this directly with Synergy to get a direct answer as we do not represent any of the providers on our page.

      Please send me a message if you need anything else. :)


  2. Default Gravatar
    IanDecember 5, 2017

    Why do we have to pay a supply charge of over $50.00 isn’t this amount a bit over the top.

    • finder Customer Care
      LouDecember 5, 2017Staff

      Hi Ian,

      Thanks for your question.

      I would like to confirm, are you referring to usage charge? Usage charge is the additional charge that depends on how much power you actually use and it is measured in cents per kilowatt hour (c/kWh). It is sometimes called a ‘variable charge’ or ‘consumption charge’ and will vary from month to month. If your consumptions is low, the charges may be lower than $50.

      You may have to directly reach out to your provider to confirm their rate for usage charges.


  3. Default Gravatar
    FMLAugust 7, 2017

    I was told that if I switch to Kleenheat because you were recommended to me or I have been referred by a kleenheat customer that I will receive an ongoing 20% discount on my bills, is that correct ?

    • Default Gravatar
      ArnoldAugust 7, 2017

      Hi F Latham,

      Thanks for your inquiry.

      You maybe eligible for the 20% discount. For confirmation, It would be best to speak with Kleenheat directly you may contact them here 13 13 51 and 13 13 52

      Hope this information helped.


  4. Default Gravatar
    TanyaJuly 19, 2017

    I am a resident in Perth WA. What alternatives are there for residential electricity providers, outside of Synergy? Is synergy only option? Am looking for cheaper alternatives.

    • finder Customer Care
      RenchJuly 23, 2017Staff

      Hi Tanya,

      Thanks for your inquiry.

      There is also Horizon Power. Owned by the Western Australian state government, Horizon Power provides energy to residential customers outside the SWIS. Horizon Power is active in creating a more environmentally friendly energy network and is working to generate more power from renewables and create a more efficient state.


  5. Default Gravatar
    BockarieJune 19, 2017

    Can you have pay-as-you-go system in your gas and electrical bills, like the one they have in London?

    • Default Gravatar
      JonathanJune 20, 2017

      Hi Bockarie!

      You can shop around with our list of energy and gas suppliers on this page.

      You may also leave your information on the Enquiry Form on the same page, so that an energy broker will discuss your options.

      Hope this helps.


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