Phantom energy, also called standby power, typically costs a U.S. household about $50-$150 per year, though homes with many always-on devices may spend more. The bill depends on the devices’ idle wattage, how many hours they remain plugged in, and the local electricity rate.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Annual household standby use | $25 | $90 | $200 | Varies by equipment and electricity rate |
| Continuous 1-watt load | $1.05/year | $1.40/year | $2.19/year | At $0.12-$0.25 per kWh |
| Smart power strip | $15 | $35 | $70 | Purchase price, before any savings |
Typical annual phantom energy cost in a U.S. home
For a home using roughly 10,000-12,000 kWh of electricity a year, standby power may account for about 5%-10% of household use, or around 500-1,200 kWh. At $0.12-$0.25 per kWh, that works out to approximately $60-$300 annually; a more typical planning range is $50-$150, depending on the home and utility rate.
A small continuous load can add up: each watt left on all year uses 8.76 kWh. At a national-style example rate of $0.16 per kWh, 1 watt costs about $1.40 a year, and a 10-watt load costs about $14. These estimates assume the device draws the stated power continuously.
Assumptions: Household use and rates are estimates, not fixed national averages; actual bills depend on utility pricing and device behavior.
What televisions, consoles, and chargers add to the bill
Standby draw differs by device and model. The table shows illustrative annual costs at $0.16 per kWh, assuming each load persists for 8,760 hours. A device that powers down fully or enters a lower-power mode will cost less.
| Device or load | Standby draw | Annual energy | Annual cost |
|---|---|---|---|
| TV in standby | 1-3 watts | 9-26 kWh | $1-$4 |
| Game console in standby | 2-10 watts | 18-88 kWh | $3-$14 |
| Cable box or DVR | 10-25 watts | 88-219 kWh | $14-$35 |
| Computer and monitor sleep | 2-10 watts | 18-88 kWh | $3-$14 |
| Phone charger with no phone | 0.1-0.5 watt | 1-4 kWh | Under $1 |
Set-top boxes and devices that stay ready to record or connect can cost more than an idle charger. Actual draw varies by model, settings, network activity, and whether the device is charging, sleeping, or fully idle.
Which wattage and electricity rate change the estimate?
Two numbers drive the calculation: standby watts and the price per kilowatt-hour. The formula is watts × hours ÷ 1,000 × electricity rate. For a device left on year-round, the calculation simplifies to watts × 8.76 × rate.
At $0.16 per kWh, a 5-watt load costs about $7 per year, while a 20-watt load costs about $28. A 10-watt device used in standby for only 12 hours a day costs about $7 annually at the same rate. Check the device label or use a plug-in power meter; low standby loads can be difficult to estimate by sight.
Equipment that remains connected to the internet, records scheduled programs, or maintains a quick-start mode may draw more than a basic television in standby. A group of devices drawing 30 watts together uses about 263 kWh a year, costing roughly $42 at $0.16 per kWh.
Three home setups show how standby costs stack up
The examples below use a $0.16-per-kWh rate and continuous standby draw. They are estimates for comparison, not universal device readings.
| Setup | Combined load | Annual energy | Estimated yearly cost |
|---|---|---|---|
| TV and one charger | 3 watts | 26 kWh | $4 |
| TV, console, cable box, and computer | 30 watts | 263 kWh | $42 |
| Several entertainment devices and two always-on boxes | 60 watts | 526 kWh | $84 |
Adding up several moderate loads often matters more than unplugging one low-draw charger. For a more realistic estimate, measure each device during the hours it is actually idle and multiply by the household’s electricity rate.
Why the same standby load costs more in some states
Electricity rates vary widely across the United States, so an identical device load can produce noticeably different bills. For 500 kWh of standby use a year, the cost is $60 at $0.12 per kWh, $80 at $0.16, and $125 at $0.25.
Use the per-kWh rate on the electric bill rather than a national average for a household-specific estimate. Some bills also include fixed charges or tiered rates; those charges may not fall when energy use drops. In areas with time-of-use pricing, standby devices that operate during higher-priced hours can have a different effective cost.
When a power strip or timer can pay for itself
A basic switched power strip may cost $10-$25, while an automatic or smart model often costs $20-$50. If a strip shuts off a 10-watt group for 12 hours daily, it saves about 44 kWh a year, worth roughly $5-$11 at $0.12-$0.25 per kWh. Savings are smaller if the devices already enter low-power sleep.
Target a measured load before buying controls. A strip that costs $25 will not quickly pay back if it eliminates only $2 of standby electricity a year. Avoid cutting power to equipment that needs continuous operation, such as a modem, medical device, security system, or DVR that must record.
Which standby loads are safe to switch off?
TVs, speakers, game systems, and chargers can often be switched off when unused, but check their settings first. Some devices lose clock, network, or scheduled-recording functions when power is cut. A smart strip can separate always-on equipment from entertainment gear that can be shut down together.
Start with high-wattage devices and convenient shutdowns, not every plug in the home. Enable sleep modes, turn off quick-start features when they are not needed, and unplug seldom-used equipment. If measured standby use is already low, changing habits may save more than purchasing new hardware.