Which household appliances use the most electricity?

The scale is worth putting a number on. One estimate puts the combined annual running cost of the five biggest appliances, the oven, dishwasher, fridge, washing machine and tumble dryer, at £1,327 a year³. That figure will vary with your tariff and habits, but it explains why households planning energy improvements start by ranking their biggest consumers rather than their smallest.

The wet appliances: the biggest share of the bill

The "wet appliances" are the washing machine, dishwasher and tumble dryer, and they are consistently named the most energy-consuming home appliances¹. The Energy Saving Trust puts their share of a typical energy bill at 14%¹, and uSwitch reports the same figure⁵. Both sources point the same way: this group is where appliance electricity use concentrates.

The reason is simple. Each of these machines heats water or air, and heating is the most electricity-hungry thing a household does. A dishwasher has to heat its wash water, a washing machine has to heat a drum of laundry, and a tumble dryer has to heat and move air for an hour or more. That is also why the group responds so strongly to habits: dropping the temperature, filling the machine and skipping the dryer all cut the heating, and therefore the cost, without touching the appliance itself.

For a household thinking about energy independence, this matters twice over. These appliances are pure electricity loads, so they draw from the grid or from your own generation, and they are flexible loads, they can run when the sun is out or when a tariff is cheap, which is exactly the kind of demand that solar panels and batteries work best against.

What the dryer, the washer and the dishwasher each cost

Within the group, the tumble dryer stands apart. Tumble dryers consume more energy than most washing machines⁶, and they are described by Home Energy Scotland as one of the most energy-consuming home appliances⁷. The numbers behind that: a typical cycle uses 3 to 5 kWh⁸, and one guide puts an average cycle at 3 kWh, costing 79p at the October 2026 price cap unit rate⁹. Another puts vented and condenser dryers at roughly £1.21 to £1.56 per cycle¹⁰; the estimates differ because machines and cycles differ, but even the lower figure makes a daily drying habit one of the most expensive things you can do with electricity. A 2500 W dryer works out at about 11p for every 10 minutes of use¹¹. If you are weighing the dryer against the washing line, our page on tumble dryer vs drying clothes outside works through the savings.

Washing machines are cheaper per use: an average wash uses between 400 and 1300 watts³. Washer-dryers, which combine both jobs in one machine, are the priciest appliances to run, costing over £200 per year on average according to Which? testing¹². Our page on washing machine running costs covers that in more detail.

Dishwashers are the surprise of the group. A modern dishwasher will usually be more efficient than washing up by hand, both in electricity and in water use⁵, and the Centre for Sustainable Energy says that if you do a full load and select a medium temperature, a dishwasher can use less energy than hand washing¹³. The saving from cutting back is modest rather than dramatic: reducing dishwasher use by one run a week for a year could save £10 in Great Britain and £13 in Northern Ireland¹⁴.

Why the same machine costs different households different amounts

The same machine can cost wildly different amounts depending on how it is used. The basic arithmetic is: appliance power rating (kW) × electricity unit cost (£) × time used (hours) = running cost¹⁵. Everything a household does to change one of those three, a shorter cycle, a cheaper time of day, a fuller load, changes the bill.

Lower wash temperatures are the clearest example: lower temperatures use less energy¹⁶. Only running the washing machine with a full load, and drying clothes outside instead of using the tumble dryer, are both recommended actions¹⁷. On timing, people with children, shift workers, and households with medical devices may need to consume electricity at peak times¹⁸, so time-shifting is not open to everyone, but where it is, it is free.

To see what your own habits cost, several tools exist. The Consumer Council's Appliance Cost Checker gives estimates of how much appliances cost to run per day, per week and per year¹⁹. A smart meter display shows how much gas and electricity you use and what you spend for each hour, week and month²⁰, and some apps analyse smart meter data weekly to break usage down by appliance category²¹. For context, Ofgem's medium household figure is 2,700 kWh of electricity a year²², which is the consumption value used for bill calculations. If you want to go deeper before spending anything, see working out how much energy your home uses.

Energy ratings, size and the figure that matters more than the letter

Energy labels rate appliances from A to G, with A the most energy efficient and G the least²³. Citizens Advice puts it the same way: the rating tells you how energy efficient the appliance is²⁴. Labels also carry product-specific data and a QR code you can scan for more information².

The trap is size. The energy rating is generally linked to an appliance's size, so a bigger A-rated product of the same type uses more energy than a smaller one²⁵. Those rated A are the most efficient for their size, and to compare between differently sized appliances, energy labels also print suggested kWh usage per annum¹¹. That annual figure, not the letter, is what lets you compare a large machine with a small one. When replacing an appliance, independent guidance suggests considering energy efficient models, which may be A-rated²⁶; our page on appliance upgrade savings looks at what that pays back.

Free savings: habits that shrink the bill on the machine you already own

None of the big savings require a new machine. The recommended actions are turning appliances off at the wall rather than leaving them on stand-by, switching to energy-saving lightbulbs, only running the washing machine with a full load, and drying clothes outside instead of using tumble dryers¹⁷. Almost all electrical appliances can be turned off at the plug without affecting their settings²⁷, so the stand-by saving costs nothing but a walk to the socket; our page on standby savings quantifies it.

In the kitchen, you might be able to save more energy by using an air fryer or microwave instead of the oven²⁹, a comparison we cover in air fryer vs oven. The one exception to switching off is the cold appliances: fridges and freezers need to be on all the time²⁷, so their saving comes from replacement or from where you put them, not from switching them off.

Taken together, these are the classic no-cost and low-cost measures, and they fit into the wider sequence of no-cost and low-cost ways to cut energy use and how much changing habits can save. They do not make a home independent of the grid, but they shrink the load that any future solar, battery or tariff arrangement has to cover, which makes every later step cheaper and easier.