Compare the bill with an earlier one to check your usage, billing period, tariff rates and whether the meter reading was estimated. Heating, cooling, hot-water systems and older appliances can significantly increase electricity use, while a rate change or missed discount may also affect the total. Contact your retailer if the reading or charges look incorrect, and ask whether a payment plan or hardship support is available. You can compare plans and usage costs through the Australian Government’s Energy Made Easy website.