Your electricity bill shows usage in kilowatt-hours (kWh), usually compared with the same period last year, so check whether the reading is actual or estimated. Heating and cooling, hot water, pool pumps, dryers and older fridges can account for a large share of household electricity usage. If you have a smart meter, your retailer may offer daily or half-hourly usage data to help identify peaks; otherwise, compare meter readings over several days while using appliances normally. You can also compare plans and estimated annual costs through the Australian Government’s Energy Made Easy website.