A time-of-use tariff charges different electricity rates at set times, usually with higher peak prices, lower off-peak prices and sometimes shoulder rates. It may suit households that can shift usage, such as running the dishwasher, washing machine or electric vehicle overnight, but it can cost more if you use lots of power during peak periods. The times and rates vary by state, network and retailer, and you generally need a compatible smart meter. Compare the plan’s estimated annual cost, usage rates and supply charge with your current bill, and check the details with your retailer or the Energy Made Easy website.