A time-of-use tariff charges different electricity rates at peak, shoulder and off-peak times, rather than one rate all day. It may suit a household that can shift usage, such as dishwashers, washing machines or electric-vehicle charging, to cheaper periods. However, peak rates can be higher, so the best option depends on your household’s usage patterns, meter and available plans in your area. Check your retailer’s current rates and compare offers using an official government comparison service or independent energy advice.