How much can switching appliances off standby save?

The saving is not a single device. It is the sum of many small draws: televisions, broadband routers, set-top boxes, games consoles and chargers, each using a little power while switched off but still plugged in. A Go.Compare Energy study reported by NICEIC put the annual cost of a television left on standby for 20 hours a day at £9.50, which shows how the household total accumulates across a dozen or so devices⁵.

What the measure does for a household's energy independence is modest but real. It reduces the electricity a home must buy, and it needs no installer, no permission and no capital. What it does not do is remove dependence on the grid or on a supplier: the home still draws power for everything else, and the saving is measured in pounds avoided rather than energy generated. It is a behavioural measure, and it sits alongside the wider set of no-cost steps covered in quick wins and no-cost measures.

What switching off standby saves: around £45 a year in GB, £55 in NI

The headline figure is consistent across the Energy Saving Trust's own pages. Its Christmas energy tips state that switching devices off standby all year round could save £45 in GB and £55 in NI a year off electricity bills¹. Its home improvement guidance repeats the same pair, and its quick-tips hub gives the same numbers again². The kitchen tips page frames it as dependent on the appliances a household has: £45 a year in GB and £55 in NI by switching all devices in the home off standby⁴.

Other organisations quote the same range. The Consumer Council for Northern Ireland gives around £55 per year for switching off standby mode on devices, which is the NI figure rather than the GB one⁸. British Gas Energy Trust says switching appliances off at the wall instead of leaving them on standby could save up to £45 a year⁹. Cadent gives £45 per year for switching appliances off standby mode, covering consumer electronics, lights and chargers left on standby or not in use¹⁰.

The gap between GB and NI is not explained in the guidance, but it reflects the different electricity markets and tariff structures in the two jurisdictions. Northern Ireland has its own supplier market and its own price regulation, so a saving expressed in pounds will differ even where the underlying kilowatt hours are similar.

Two lower figures appear in the material. The Centre for Sustainable Energy advises renters that a typical household can save up to £40 a year just by remembering to turn off appliances left on standby⁶. Ideal Heating, a boiler manufacturer, gives £30 a year for turning appliances off rather than leaving them on standby, in guidance dated July 2020¹¹. The £30 figure is older and comes from a maker rather than an official or independent body, and it predates the price rises of the intervening years.

Why appliances left on standby still draw power

Standby electricity is the energy appliances and electronic devices use while switched off but still plugged in⁵. Smart Energy GB defines standby mode as a low-power state that an appliance, still plugged into the power source, can enter when not being actively used⁷. The device is not off in the sense of drawing nothing; it is waiting for a signal, a remote control command or a timer.

That waiting state exists for a reason. Some satellite and digital TV recorders need to be left plugged in so they can keep track of programmes scheduled for recording⁷. Fridges and freezers need permanent power for a different reason: their contents. The Energy Saving Trust states plainly that it does not advise switching off fridges or freezers, because they need to stay switched on to prevent their contents from spoiling².

The draw is not confined to the appliance itself. Homey notes that power adapters often draw power even when the device itself is not actively being used¹². A charger left in a live socket is a small continuous load. Smart bulbs behave the same way: a smart bulb uses some standby power all the time whether it is on or off, so it can react to a signal from a phone, smart speaker or other controller¹³.

Storage heaters are a separate case again. They usually draw electricity from the grid overnight at a cheaper rate and disperse heat at a low and slow level through the day, and they rely on the heat stored overnight, so planning ahead is essential¹⁴. They are not standby devices, but they illustrate the same principle: some loads are designed to run when the household is not watching them.

Which appliances cost the most on standby

The NICEIC report on vampire devices gives the clearest breakdown, based on a Go.Compare Energy study estimating the annual costs of leaving 11 popular devices on standby for 20 hours per day⁵. Televisions come out at £9.50 a year. The study covers the usual set: televisions, broadband routers, set-top boxes, games consoles and similar consumer electronics.

The Centre for Sustainable Energy's myth-busting page gives the household total as £45 a year for leaving TVs, broadband routers, set-top boxes, games consoles and other appliances on standby¹⁶. That list is effectively the ranking: the devices that are always connected, always listening for a signal, and rarely switched off at the wall.

Two claims in the material are worth treating with caution. A 2022 study published by CREDS describes a claim that switching off electrical items on standby can save £147 a year as a large over-estimate¹⁷. That figure is roughly three times the Energy Saving Trust number and should not be used. Separately, a Northern Powergrid page aimed at customers on its extra care register states "SAVE £55 A YEAR just by turning your appliances off standby mode"¹⁸. That is the Northern Ireland figure applied to a page covering northern England, and it is higher than the GB figure the Energy Saving Trust gives.

How to switch off standby across the home

The practical method is a walk round the home, not a single switch. The Energy Saving Trust's home improvement guidance describes saving around £45 a year in GB and £55 in NI just by turning appliances off standby mode, and its kitchen tips list dishwashers, microwaves and washing machines among the products that do not need to be on 24/7².

A room-by-room approach works because the devices cluster. Living rooms hold televisions, set-top boxes and games consoles. Home offices hold routers, monitors and chargers. Kitchens hold microwaves, dishwashers and washing machines. Bedrooms hold chargers and, increasingly, smart speakers.

Homey's guidance suggests grouping devices onto smart plugs and creating flows to cut their power completely at night or when the household is away¹². That is a maker's method for its own system, but the principle applies to any timer or switched extension lead.

Two safety rules override the savings. The first concerns fridges and freezers, which should stay on². The second concerns gas. Confused.com's gas safety guidance states that in a suspected gas leak no electrical switches should be operated, including flicking a light switch on or off, because they could create a spark¹⁹. Standby savings are irrelevant in that situation.

Does standby saving justify smart plugs and timers

A smart plug can help reduce standby power if it fully cuts power to an appliance that would otherwise use more standby electricity than the smart plug itself uses²⁰. That condition is the whole argument. A smart plug stays in standby mode so it can respond to commands, which means it always uses a small amount of electricity, even when the connected device is switched off²⁰. The Centre for Sustainable Energy puts it directly: a smart plug only saves electricity if it stops the household using more power than the plug itself uses²⁰.

NICEIC notes that many smart plugs enable automatic cutting of power to appliances in standby mode, which is the useful function⁵. The limitation is scheduling. Centre for Sustainable Energy guidance states that appliances such as tumble driers, washing machines and dishwashers often do not start their cycles just when power is delivered, so a smart plug would only be able to monitor power consumption rather than control the cycle²¹.

Smart bulbs carry a similar trade-off. A smart bulb uses some standby power all the time whether it is on or off, so it can react to a signal from a phone, smart speaker or other controller¹³. A household replacing a conventional bulb with a smart bulb adds a permanent small load in exchange for control.

The arithmetic is therefore device-specific. Where a television, games console or set-top box draws more in standby than the plug draws to stay connected, the plug pays. Where the appliance is already low-draw, or where the plug cannot control the cycle, it does not.

Is it better to unplug appliances or switch them off at the socket?

Switching off at the socket is sufficient for almost everything. The Energy Saving Trust states that almost all electrical appliances can be turned off at the plug without upsetting their programming³. Smart Energy GB gives the same assurance: almost all electrical appliances can be turned off at the plug without affecting their settings⁷.

Unplugging adds nothing beyond what the switch achieves, except in two situations. A socket without a switch needs the plug removed to break the circuit. A charger left in a live socket continues to draw a small current even with no device attached, as Homey notes of power adapters generally¹².

The exceptions are the appliances that need permanent power. Fridges and freezers should stay on². Some satellite and digital TV recorders may need to be left plugged in so they can keep track of programmes scheduled for recording⁷. Storage heaters rely on overnight charging and need planning rather than switching¹⁵.

Do phone and laptop chargers use electricity when left plugged in?

Chargers are a small but persistent load. Homey notes that many power adapters draw power even when the device itself is not actively being used¹². The Centre for Sustainable Energy advises renters not to leave a mobile phone on charge all night, because phones only need two or three hours⁶.

There is a safety dimension as well as a cost one. North Wales Fire and Rescue Service advises against charging devices overnight when anyone is asleep, or leaving them on charge when the home is empty²². That guidance concerns lithium ion battery fire risk, and it applies regardless of the electricity cost.

The practical position is that chargers are worth unplugging or switching off, but they are not where the bulk of the £45 sits. The always-connected entertainment and networking devices are.

How standby fits into a wider set of household savings

Standby is one line in a household budget, and it is worth seeing it against the others. Standing charges are the fixed part of a bill, covering the costs of providing a home with gas and electricity, including network connection, meter readings, maintenance and government initiatives²³. Those charges apply whether or not a household uses any electricity, so they set a floor that standby savings cannot touch.

Tariff structure changes what a kilowatt hour saved is worth. A tracker tariff with a discount on the unit rate produces higher savings for higher usage, and vice versa, while a cap tracker with a discount on the standing charge suits lower-consumption households better than a tracker where the discount is on the unit rate²⁴. Zero standing charge tariffs are best suited to households that use little gas or electricity, and to properties left empty for long periods such as holiday homes²⁵.

Savings estimates themselves are modelled, not measured. Uswitch calculates savings as the difference between the estimated annual cost of a household's current plan, based on the latest price cap rates for a standard variable tariff, and the plan it could switch to, using estimated annual usage²⁶. That is why a standby figure quoted by one organisation can differ from another's: the underlying usage assumptions and the price period differ.

For a household working through a plan, standby sits in the behavioural tier. It costs nothing, it needs no assessment, and it can be done today. It does not replace insulation, heating controls or a whole house plan, and it does not generate anything. What it does is reduce the electricity a home must buy, which is the first and cheapest form of energy independence available to any household, rented or owned.