Electricity prices in Newcastle depend on your retailer, tariff type, daily supply charge, usage rates and how much power your household uses. Most Newcastle homes are in the Ausgrid network, but the network does not choose your retail plan or final bill. Compare available offers using the Australian Government’s Energy Made Easy website, using your postcode and a recent bill for a more accurate estimate. Check the plan’s estimated annual cost, discounts, solar rates and contract conditions before switching.