Compare the bill with your previous one to see whether the increase comes from higher usage, a price change, an estimated meter reading or a new fee. Check your tariff, billing dates and meter reading, then contact your retailer if anything looks incorrect or unclear. You can also ask about a cheaper plan, payment assistance or a hardship program, although eligibility and available support depend on your circumstances and retailer. For general energy-saving and assistance information, visit energy.gov.au or your state or territory energy ombudsman.