How much are your plugged-in devices silently adding to your electricity bill?

Household appliances continue to draw power when plugged in, even if they are not in use, according to the U.S. Department of Energy. These so-called "energy vampires" include items like TVs, printers, gaming consoles, coffee makers, and even electric toothbrushes, according to tech site CNET.

Remote-controlled devices, such as TVs, stereos, and DVD players, are among the worst offenders, energy company Energy Australia warns. These appliances require constant power to remain ready to respond to a remote signal when turned on again.

In the kitchen, appliances with clocks, such as microwaves, continue to draw power to keep time, even when they are not actively used. Over time, these small, hidden energy drains can significantly contribute to rising electricity costs.

Household appliances continue to draw power when plugged in, even if they are not in use, quietly adding to electricity bills over time. Illustation from Pexels

The hidden cost of standby power

Many are surprised to learn how much standby power can add to their bills. Standby power accounts for approximately 5% to 10% of residential energy use, according to the U.S. Department of Energy.

A study by the U.S. Natural Resources Defense Council found that always-on devices can silently add up to US$165 a year to the average household electricity bill. Nationwide, reducing the load from these devices could save consumers a total of US$8 billion annually and prevent the use of 64 billion kilowatt-hours of electricity.

In Australia, leaving multiple devices on standby could add AUD$100 to AUD$150 (US$65–$100) to your electricity bill annually. Across the country, standby power costs Australians a staggering AUD$860 million each year.

How to reduce standby power consumption

The most effective way to reduce standby power is by switching off appliances at the power outlet when not in use, Australian energy company Engie recommends. Make sure power points are easily accessible and not obstructed by furniture. Setting reminders to turn off devices before going to bed can also help ensure appliances are fully powered down.

When upgrading appliances, be sure to check their energy ratings, especially regarding standby power. Energy-efficient appliances consume less power even when idle.

Additionally, smart home devices and automation tools can further optimize energy use. Set timers to turn off devices at specified times or use intelligent "off" switches that disconnect appliances after a period of inactivity.