Compare the kilowatt-hours (kWh) on your 2026 bills with the same months from previous years, rather than comparing dollar amounts, because tariffs and charges can change. Your retailer’s bill or online account may show daily usage, and a smart meter can provide more detailed readings. Look for changes such as extra heating or cooling, new appliances, more people at home or solar-system changes. If the figures seem incorrect, ask your retailer to investigate the meter data and billing; the Australian Energy Regulator and energy.gov.au also provide general information.