Cheapest electricity plan in Adelaide
As of 8 November 2026, the cheapest published electricity plan in Adelaide for a household using 4,000 kWh a year is iO Energy's Sustainable Home (Electrify) at an estimated $129 a month, on the SA Power Networks network.
Adelaide's 131 postcodes within 30 km of postcode 5000 are all on the SA Power Networks network, where 241 plans from 25 retailers are published and the median is $172 a month. Your postcode page names your network and the cheapest plans on it. Figures are OpenStream's estimates from the supply and usage rates each retailer publishes to the Australian Energy Regulator, at the stated annual usage, GST as published and conditional discounts excluded; they are not retailer quotes. Demand-priced, variable-priced and solar-only plans are left out because they have no single honest figure.
Cheapest first
Estimated monthly cost at the stated usage. Every plan links its page; the button hands off to the retailer.
- 1iO Energy Sustainable Home (Electrify)SA Power Networks network$129/moGo to iO Energy
How many people at home?
Tap one to begin. Two more questions, your postcode and the bill, then every published plan on your network, cheapest first. Open the check
How to read this
Every figure is OpenStream's estimate, not a retailer quote: the supply and usage rates each retailer publishes to the Australian Energy Regulator (via Energy Made Easy), applied to the stated annual usage, GST as published, conditional discounts excluded. Prices vary by distribution network, not postcode, so the network page is the record; it links every plan to its regulator entry and keeps a nightly history. Demand-priced, variable-priced and solar-only plans are left out because they have no single honest figure. Errors are possible - check the cited sources. Full method: methodology. Machine-readable: this answer as JSON, MCP, llms.txt.
Related: Electricity prices for postcode 5000 · Cheapest on the SA Power Networks network · Cheapest electricity plan in South Australia · Cheapest small business electricity plan in South Australia · Is my bill too high? Check it against every published plan · All answers
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