Your electricity bill usually combines a usage charge, measured in cents per kilowatt-hour, with a daily supply charge. The price can also reflect wholesale electricity, network costs, environmental schemes, retailer operating costs and any discounts or fees. Some plans use time-of-use rates, so electricity may cost more at certain times, while others offer a single rate. Prices and available plans vary by state, distributor and retailer, so compare the Energy Price Fact Sheet and check the retailer’s offer before switching.