Which household appliances use the most electricity?

Within the wet group, the tumble dryer stands out. It is described as the most energy-consuming appliance used in the home², and tumble dryers consume more energy than most washing machines³. A single cycle uses 3 to 5 kWh⁴, and National Energy Action puts the cost of a vented or condenser dryer cycle at approximately £1.21 to £1.56⁵. The five appliances named as the top consumers, an oven, dishwasher, fridge, washing machine and tumble dryer, could cost £1,327 a year to run combined⁶.

Ranking appliances is the first step in deciding what to change. It also shows how much of the bill is fixed by continuous duty rather than by habit, and how much can be shifted by how a machine is loaded, programmed and switched off.

The wet appliances: around 14% of a typical energy bill

Wet appliances are the laundry and dishwashing group, and they are the single largest cluster of consumption in most homes. Washing machines, dishwashers and tumble dryers account for 14% of a typical energy bill¹, a figure repeated in guidance on washing up versus dishwashing⁹. A separate estimate puts wet appliances at nearly 10 per cent of a typical household's energy bills¹⁰, and the two figures are measuring slightly different things: the 14% covers the three appliance types together, while the narrower figure is a broader wet-appliance share. Both point the same way.

The group matters because it is the most controllable. Cold appliances run whether anyone is home or not, but laundry and dishwashing happen when a household chooses. That is why the same sources that rank wet appliances highest also rank them first for behaviour change: only running the washing machine with a full load, and drying clothes outside instead of using a tumble dryer, are named among the recommended actions for cutting electricity use¹¹.

For a household working towards energy independence, this group is where self-consumption of rooftop solar is easiest to arrange, because runs can be timed. It is also where dependence on the grid is hardest to remove entirely: a tumble dryer on a wet week, or a dishwasher after a large meal, draws whatever the panels and battery cannot supply. The practical question is not whether the appliance can run off-grid but how much of its load can be moved into daylight hours.

Tumble dryers, dishwashers and washing machines compared

The three wet appliances are not equal. Tumble dryers are ranked as one of the most energy-consuming home appliances¹², and the dryer is called the most energy-consuming appliance used in the home². Washing machines, dishwashers and tumble dryers together are described as the most energy consuming home appliances¹³, but within that group the dryer does the heaviest lifting per cycle.

The washer-dryer is the outlier in cost terms. Washer-dryers are the priciest appliances to run, costing over £200 per year on average, according to Which? testing cited in Welsh Government guidance¹⁷. That is a combined figure for two functions in one cabinet, and it reflects how often the drying function is used.

The dishwasher comparison is more favourable than most people expect. A modern dishwasher will usually be more efficient than handwashing, both in electricity and water⁹, and if a full load is run at a medium temperature it can use less energy than washing up by hand¹⁸. The condition is the full load: a half-empty dishwasher loses the advantage.

How running habits change what each appliance costs

The running cost of any appliance is a product of three things: its power rating, the unit cost of electricity and the time it runs. The formula is appliance power rating in kW multiplied by the electricity unit cost in pounds multiplied by time used in hours¹⁹. That means two identical machines can cost different amounts in two households, purely through loading and programme choice.

The tools for checking this are widely available. The Consumer Council's Appliance Cost Checker Tool gives estimates of how much electrical appliances cost to run per day, per week and per year, with daily as the default setting²⁰, and it also provides tips on saving money on electricity bills and improving energy efficiency²¹. A smart meter's in-home display shows how much gas and electricity is used and how much is spent on energy for each hour, week and month²², and smart meter data can be analysed to identify energy usage across different appliance categories, updated weekly²³.

For households that can shift load, timing matters. Official guidance notes that people with children, shift workers and households with medical devices may need to consume electricity at peak times²⁴, which is a reminder that load shifting is not available to everyone. For those who can, the display is the practical instrument: it shows what a run costs at the moment it happens, on the tariff actually being paid.

Reading the label: energy ratings and what they mean

Energy labels rate appliances from A to G, with A the most energy efficient and G the least⁸. The same scale is described in consumer guidance as an energy rating from A to G that tells you how energy efficient the appliance is²⁵, and in appliance guidance as ratings going from A, the most efficient, using the lowest kWh, through to G, the least efficient, which uses much more kWh⁶.

The label carries more than the letter. All labels include the product's energy efficiency rating alongside product-specific data, and a QR code to scan for more information⁷. Labels also print suggested kWh usage per annum for each appliance, which is what allows comparison between differently sized products¹⁵.

That size link is the part most often missed. The energy rating is generally linked to size, so of two A-rated products of the same type, the bigger one uses more energy²⁶. A large A-rated fridge-freezer can therefore consume more than a small B-rated one. The annual kWh figure on the label is the like-for-like number; the letter is a within-size comparison.

Independent guidance suggests considering energy efficient models, which may be A-rated²⁷. The label is a starting filter, not a running-cost prediction, because it assumes standard use. A household that runs a machine daily will see a different annual cost from one that runs it weekly, whatever the letter on the door.

Cutting appliance electricity use without replacing anything

Most of the reduction available in a kitchen and utility room needs no purchase. Turning appliances off at the wall rather than leaving them on stand-by is a named recommended action¹¹, and almost all electrical appliances can be turned off at the plug without affecting their settings²⁸. You can turn almost all electrical appliances off at the plug without upsetting their programming²⁹.

Some appliances must stay on. Fridges and freezers need to be on all the time²⁹, so they are excluded from any switch-off routine. For everything else, the pattern is straightforward: full loads in the washing machine, drying outside rather than in a tumble dryer¹¹, and the wall switch rather than standby.

Cooking offers a substitution rather than a switch-off. Guidance notes that more energy may be saved by using an air fryer or microwave instead of an oven³⁰. That is a change of appliance for the task, not a change to the appliance.

For households planning upgrades rather than habit changes, the ranking above sets the order of work. The quick wins and no-cost measures page covers the free changes, and behaviour change and household habits sets out how much habit alone can save. Where an appliance is being replaced, appliance upgrade savings covers what a more efficient model is worth over a year, and the tumble dryer versus air drying comparison deals with the single heaviest user in the wet group. Households starting from the beginning of a wider plan can begin at Getting Started with Home Energy.