Energy Bill Guides
What Uses the Most Electricity in a UK Home? Appliance Costs Explained
In a typical UK home, the appliances that usually use the most electricity are wet appliances such as washing machines, dishwashers and tumble dryers, cold appliances such as fridge-freezers, cooking appliances, electric showers, electric heaters and devices that stay on for long periods. The exact order depends on your home. A property with electric heating or an immersion heater may have very different electricity use from a home with gas central heating. A kettle or electric shower has high wattage, but short use. A fridge-freezer uses less power at once, but runs all day and night. This guide focuses on electricity use, not your total household energy use including gas heating or gas hot water. Example costs use 24.67p/kWh as a reference electricity unit rate for April–June 2026.
Quick Answer: What Uses the Most Electricity in a UK Home?
The appliances that usually use the most electricity in a UK home are the ones that heat air, heat water, run for long periods, or stay switched on continuously.
Common high-impact appliances include tumble dryers, washing machines, dishwashers, fridge-freezers, electric heaters, electric showers, ovens, kettles, TVs, gaming setups and devices left on standby.
The real cost is not decided by wattage alone. A kettle uses high power, but only for a few minutes. A fridge-freezer uses less power at one time, but runs all day and night. An electric heater can become expensive because it combines high wattage with long running time.
For Most UK Homes, Check These Electricity Users First
If your electricity bill feels higher than expected, do not start by checking every small device in the house. In most UK homes, the biggest impact usually comes from appliances that either use high power, run for long periods, or operate in the background every day.
Start with these areas first:
Electric heating or immersion heater
If your home uses electric room heaters, storage heaters, panel heaters, underfloor heating, or an immersion heater, this should be your first check. Heating water or rooms with electricity can quickly become one of the largest electricity costs in the home.
Tumble dryer
A tumble dryer can have a high electricity impact because it uses heat and often runs for long cycles. If you use it several times per week, it may contribute more to your bill than many smaller appliances combined.
Electric shower
Electric showers use a lot of power while running. A short shower may not seem significant, but long or repeated showers across a household can add up quickly.
Oven and electric hob
Cooking appliances can be expensive when used for long preheating, large meals, or daily cooking. The impact depends heavily on cooking habits and whether smaller appliances could do the same job more efficiently.
Dishwasher and washing machine
These appliances may not always use the most power per minute, but frequent hot cycles, half-loads, and high-temperature settings can increase their electricity use over time.
Fridge-freezer
A fridge-freezer runs all day, every day. A very old, faulty, overfilled, badly ventilated, or poorly sealed unit can quietly add to your electricity usage month after month.
Standby and entertainment devices
Standby devices are rarely the biggest single cost, but TVs, games consoles, set-top boxes, chargers, speakers, and home office equipment can become noticeable when several are left on every day.
The exact order will vary by home. A property with electric heating will usually have a very different electricity profile from a home with gas central heating. Use this list as a practical starting point, then compare it with your smart meter readings, appliance labels, or plug-in energy monitor.
For most UK homes, check these electricity users first
Use this as a practical starting point, not as an exact bill prediction. The biggest electricity costs usually come from appliances that produce heat, run for long periods, are used frequently, or stay switched on continuously.
Electric heating / immersion heater
Very highTypical use: High power, often long running time.
Why it matters: Can dominate electricity use if used daily.
Check first: Running time, thermostat settings and heat loss.
Tumble dryer
HighTypical use: Full heating cycle.
Why it matters: Uses heat and may run several times per week.
Check first: Cycles per week, dryer type and over-drying.
Electric shower
Medium-highTypical use: Very high wattage, usually short use.
Why it matters: Daily use across a household can add up.
Check first: Shower kW rating and shower length.
Oven / electric hob
Medium-highTypical use: Heating appliance used for cooking sessions.
Why it matters: Frequent cooking can become significant.
Check first: Preheating, cooking time and appliance size.
Dishwasher / washing machine
MediumTypical use: Regular wash cycles.
Why it matters: Water heating and repeated use affect total cost.
Check first: Cycle type, temperature and full-load use.
Fridge-freezer
MediumTypical use: Runs 24 hours a day.
Why it matters: Lower power at one moment, but continuous use.
Check first: Age, seals, temperature setting and frost build-up.
TV / gaming / home office
Low-mediumTypical use: Several hours of daily use.
Why it matters: Multiple devices used for hours can add up.
Check first: Hours used, standby mode, monitors and peripherals.
Router / smart hubs / standby
Low-mediumTypical use: Always-on background use.
Why it matters: Usually small individually, but still worth checking.
Check first: Non-essential standby devices only.
These examples are based on typical usage patterns. Actual costs depend on your appliance model, tariff, region, settings and how often each appliance is used.
Why some appliances use more electricity than others
An appliance becomes expensive when it has one or more of these factors:
High wattage
It uses a lot of power while running.
Long running time
It stays on for hours.
Frequent use
It is used every day or several times a week.
Continuous operation
It stays on 24/7.
Poor efficiency
An older or inefficient model uses more electricity than needed.
This is why the biggest electricity user is not always obvious. A kettle, electric shower or oven may use a lot of power while running, but a fridge-freezer, router or standby device may matter because it stays on for many hours.
To understand this properly, see how kWh affects your electricity bill.
Methodology: how these appliance costs are estimated
The estimates in this guide use a simple formula:
For example, a 2kW electric heater used for 3 hours:
2kW × 3 hours = 6kWh
6kWh × £0.2467 = £1.48 estimated cost
These examples use 24.67p/kWh as the reference electricity unit rate. They do not include the daily standing charge because the standing charge is paid regardless of individual appliance use.
To estimate the cost of a specific appliance, use our appliance running cost calculator.
Electricity usage by appliance: UK comparison table
Use this table as a practical guide, not as an exact bill prediction. The goal is to show which appliances are worth checking first.
| Appliance | Typical usage pattern | Why it can matter | Estimated cost risk | Priority to check |
|---|---|---|---|---|
| Tumble dryer | Full drying cycle | Uses heat for a long cycle | High | Very high |
| Electric heater | 1–4+ hours | High wattage and long running time | High | Very high |
| Electric shower | Short daily use | Very high wattage, but short duration | Medium-high | High |
| Oven / electric hob | Cooking sessions | Heating appliance, often used frequently | Medium-high | High |
| Dishwasher | Regular cycles | Heats water and may run daily | Medium | High |
| Washing machine | Regular cycles | Water heating and repeated weekly use | Medium | High |
| Fridge-freezer | 24/7 | Lower wattage but always on | Medium | High |
| Kettle | Short bursts | High wattage, short use | Low-medium | Medium |
| TV / gaming setup | Several hours | Long daily use can add up | Low-medium | Medium |
| Router / smart hubs | 24/7 | Low power but always on | Low | Low-medium |
| Standby devices | Background use | Many small loads together | Low-medium | Medium |
What this table means
The first appliances to check are usually anything that produces heat, anything used every day, anything running for hours, anything left on permanently, and any old or inefficient appliance.
The table gives useful estimates, but the best next step is to track electricity usage at home.
Estimated running cost examples
The examples below use 24.67p/kWh. Actual usage varies by appliance model, setting and behaviour.
| Appliance example | Example power / energy use | Example use | Estimated cost |
|---|---|---|---|
| 2kW electric heater | 2kW | 1 hour | £0.49 |
| 2kW electric heater | 2kW | 3 hours | £1.48 |
| 3kW kettle | 3kW | 5 minutes | £0.06 |
| 2kW oven | 2kW | 1 hour | £0.49 |
| 100W TV | 0.1kW | 5 hours | £0.12 |
| 10W router | 0.01kW | 24 hours | £0.06 |
| 500W appliance | 0.5kW | 4 hours | £0.49 |
These are calculation examples, not guaranteed appliance costs. Some appliances cycle on and off, use thermostats, or vary power during operation.
The biggest electricity users in most UK homes
Tumble dryers
Tumble dryers are often one of the first appliances to check because they use electricity to generate heat and run for a full drying cycle.
The practical first step is not necessarily to replace the dryer. First, reduce unnecessary cycles, clean the filter, avoid over-drying, and air dry when realistic.
Washing machines
Washing machines matter because they are used frequently and may use electricity to heat water. For most homes, the best first step is to avoid unnecessary half-loads and use lower-temperature washes where suitable.
Dishwashers
Dishwashers use electricity mainly to heat water and run the cycle. They can become significant when used daily.
Fridge-freezers
Fridge-freezers are important because they run 24 hours a day, seven days a week. They may not use high power at one moment, but they create a continuous background load.
For older fridge-freezers, measuring real consumption can be more useful than guessing. See how to track electricity usage at home.
Electric heaters
Electric heaters can be one of the most expensive appliances to run if used for long periods. The problem is not just wattage. It is wattage multiplied by time.
| Heater power | Usage time | Electricity used | Estimated cost |
|---|---|---|---|
| 500W | 4 hours | 2kWh | £0.49 |
| 1,000W | 4 hours | 4kWh | £0.99 |
| 2,000W | 4 hours | 8kWh | £1.97 |
A low-wattage heater is not automatically cheaper in practice. If it runs for much longer because the room is cold or poorly insulated, the total cost can still be high.
Before using an electric heater for long periods, check how much electricity electric heaters use and use the electric heater running cost calculator.
Electric showers
Electric showers usually have very high wattage, but they are used for short periods. That means they can be expensive per hour, but the total cost depends heavily on shower length and household size.
Ovens and electric hobs
Ovens and hobs are important because they create heat. The cost depends on cooking time, preheating, appliance size and how often they are used.
Kettles
Kettles use high power, but usually for a short time. This means they are rarely the main cause of a high bill unless used very frequently or overfilled repeatedly.
TVs, gaming and home office devices
TVs, games consoles, monitors, desktop PCs, laptops, printers and speakers can matter when they are used for many hours per day.
Standby and always-on devices
Standby use is usually not the biggest single electricity cost in the home, but it can still be wasteful.
For devices that stay plugged in all day, check how standby power costs can add up across the home.
High wattage vs high total cost
The appliance with the highest wattage is not always the appliance costing you the most.
The highest-risk combination is: heat + long running time + frequent use.
What should you check first if your electricity bill is high?
1. Check heating appliances
Start with electric heaters, tumble dryers, electric showers and ovens.
2. Check daily-use appliances
Look at dishwashers, washing machines, kettles, cooking appliances and home office setups.
3. Check always-on appliances
Review fridge-freezers, routers, smart hubs, chargers, standby devices and entertainment equipment.
4. Check old appliances
Older or poorly maintained appliances may use more electricity than expected.
5. Check room heat loss
If a heater runs for hours but the room still feels cold, the issue may be heat loss rather than the heater alone.
Are smart plugs or energy monitors worth it?
Smart plugs and energy monitors do not reduce electricity bills by themselves. They can help if they make it easier to measure usage, schedule non-essential devices or identify waste.
| Problem | Useful first step | Product category to consider | Avoid if |
|---|---|---|---|
| I do not know what is using electricity | Measure plug-in appliances | Smart plug with energy monitoring | The appliance is not suitable for plug-in monitoring |
| I want whole-home patterns | Track overall usage | Home energy monitor | You only need to test one small appliance |
| Devices are left on overnight | Identify non-essential devices | Smart plug or switched extension lead | The device must stay on for safety or connectivity |
| A room feels cold with heating on | Check draughts and heat loss | Draught excluder or insulation product | The issue is unrelated to heat loss |
If you want to measure appliance usage more accurately, compare best smart plugs with energy monitoring. For a broader view of your home’s electricity use, see our guide to the best home energy monitors.
Some links may be affiliate links. Smart plugs and energy monitors can help with diagnosis, but they do not guarantee lower bills by themselves.
Practical examples
Example 1: 500W vs 2,000W appliance
A 500W appliance running for four hours can use the same electricity as a 2,000W appliance running for one hour. Usage time matters as much as wattage.
Example 2: Kettle vs fridge-freezer
A kettle uses high wattage for a short time. A fridge-freezer uses lower power but runs all day. That is why annual cost depends on both power and time.
Example 3: Electric heater in a poorly insulated room
If a room loses heat quickly, an electric heater may need to run for longer. In that case, reducing draughts can sometimes be a better first step than running the heater for more hours.
What not to do
Do not focus only on small devices
Phone chargers and small gadgets are rarely the main issue if you regularly use heaters, tumble dryers, ovens or electric showers.
Do not assume high wattage always means highest cost
A powerful appliance used briefly may cost less than a lower-power appliance running all day.
Do not assume low wattage always means cheap
A low-wattage appliance can still become costly if it runs for many hours.
Do not switch off essential devices blindly
Routers, alarms, medical equipment, security systems and some smart hubs may need to stay on.
Do not buy gadgets before diagnosing the issue
Measure or estimate the likely problem first. Buying a device without knowing the cause can waste money.
Recommended next step
The best next step is not to guess. Start by calculating the cost of your main appliances, then track the ones that run often or stay plugged in all day.
FAQs
What appliance uses the most electricity in a UK home?
It depends on the household, but appliances that heat air or water usually have the biggest impact. Tumble dryers, electric heaters, washing machines, dishwashers, electric showers, ovens and hobs are common examples. Fridge-freezers also matter because they run continuously.
What should I check first if my electricity bill is high?
Start with appliances that produce heat, run daily or stay on for long periods. In most homes, that means electric heaters, tumble dryers, electric showers, ovens, dishwashers, washing machines, fridge-freezers and always-on devices.
Does wattage matter more than usage time?
No. Wattage and usage time both matter. A high-wattage appliance used for a few minutes may cost less than a lower-wattage appliance running all day.
Is a tumble dryer expensive to run?
A tumble dryer can be expensive, especially if used several times a week. It uses electricity to generate heat and usually runs for a full drying cycle, which makes it one of the first appliances to check in homes with high electricity use.
Are electric heaters expensive to run?
Electric heaters can be expensive if used for several hours a day. For example, a 2kW electric heater costs about 49p per hour at 24.67p/kWh, before considering tariff differences or standing charges.
Does a fridge-freezer use a lot of electricity?
A fridge-freezer may not use high power at one moment, but it runs 24 hours a day. That makes its annual electricity use important, especially if the appliance is old, inefficient, badly maintained or set incorrectly.
What uses electricity overnight?
Common overnight electricity users include fridge-freezers, routers, standby devices, smart hubs, security systems, chargers and sometimes electric heating or hot water systems. Some devices should stay on, so check before switching anything off.
Does a kettle use a lot of electricity?
A kettle uses high power while boiling, but usually only for a short time. It is rarely the biggest annual electricity cost unless it is used very frequently or repeatedly filled with more water than needed.
Do smart plugs reduce electricity bills?
Smart plugs do not reduce bills by themselves. They may help if they let you measure usage, schedule non-essential devices or switch off appliances that are wasting electricity.
How do I find what is using the most electricity?
Start with heating appliances, daily-use appliances and always-on appliances. Then estimate usage with the formula kW × hours × unit rate, check your smart meter patterns, or use a plug-in energy monitor for suitable appliances.
Why is the standing charge not included in appliance costs?
The standing charge is a fixed daily charge you pay regardless of which appliance you use. Appliance running costs are normally calculated using the electricity unit rate per kWh, not the standing charge.
Is electricity usage the same as my total energy bill?
No. This guide focuses on electricity use. Many UK homes also use gas for heating and hot water, so your total energy bill may include costs that are not caused by electrical appliances.