A Newcastle electricity bill can rise because of higher usage, seasonal heating or cooling, tariff changes, estimated meter reads, or a price change from your retailer. Check the bill’s usage period, meter readings, daily supply charge and usage rate, then compare your plan with offers on the Australian Government’s Energy Made Easy website. Newcastle is generally supplied through the Ausgrid network, but your retailer—not the network company—handles billing and payment arrangements. If you’re struggling to pay, contact your retailer’s hardship team and check whether you may qualify for NSW assistance through Service NSW.