Compare the bill with previous bills to see whether the increase comes from higher usage, a longer billing period, an estimated meter reading or a tariff change. Check your meter reading, appliance use and any recent changes such as heating, cooling or new household equipment, then contact your retailer if the figures do not look right. Your retailer may offer payment plans, extensions or hardship support, depending on its policies and your circumstances. For general guidance, you can also check energy.gov.au or speak with your state or territory energy ombudsman.