Editorial review as of September 4, 2026. Sources cited in the article were verified against their linked origin, and the figures below were re-checked on this date.
Smart plugs have a slightly silly reputation. They are sometimes marketed as gadgets for people who want to turn on a lamp from across the room. Used carefully, they are actually one of the most cost-effective electricity-saving tools available, capable of reducing a household electricity bill by 5 to 10 percent through automation of a few specific use cases.
The trick is to use them for the right purposes, not for novelty. The applications below produce real savings; most other smart plug uses are convenience features that do not save money in any meaningful way.
The phantom load problem, revisited
Most modern electronics draw small amounts of power even when “off.” A cable box may draw 15 to 25 watts continuously. A game console in standby draws 5 to 15 watts. A modern TV uses 1 to 5 watts of standby power. A laser printer uses 5 to 15 watts. An entertainment center can collectively draw 50 to 100 watts continuously, which adds up to $50 to $100 per year of pure waste.
The solution is to physically cut power to devices when they are not in use. The historical solution was a switched power strip, which required manual operation. Smart plugs automate this with schedules, motion sensors, or app control, removing the friction that made manual switching unsustainable.
Application one: the entertainment center
The entertainment center is the highest-return smart plug application in most homes. A single smart plug controlling the TV, soundbar, game console, and cable box can save 50 to 80 watts of continuous draw.
The setup: plug the entertainment center into a power strip, plug the power strip into a smart plug, schedule the smart plug to turn off overnight (say, 1 AM to 7 AM) and during unused daytime hours (say, 9 AM to 5 PM on weekdays).
The schedule should match your actual viewing habits. If you watch TV before bed regularly, the off-time starts after your typical end of viewing. The point is to capture the hours when no one is using the entertainment center at all.
For a household where the entertainment center is genuinely unused for 14 hours a day, the smart plug can save 70 watts × 14 hours × 365 days = 357 kWh per year. At a typical electricity rate of $0.13 per kWh, that is $46 per year from a single $15 smart plug.
Application two: the home office
Home office equipment is another phantom load cluster. Monitors, printers, external drives, chargers, USB hubs, and accessories all draw power when the computer is off. A single smart plug controlling the entire desk setup can save 30 to 60 watts of continuous draw.
The setup: plug all desk equipment except the computer itself into a power strip, plug the power strip into a smart plug, schedule the smart plug to turn off when the office is not in use (overnight, weekends if applicable).
The computer itself usually stays plugged in directly so it does not lose its power when the schedule kicks in. Modern computers handle their own sleep mode efficiently and do not benefit from being completely powered off.
For a remote worker whose desk is unused for 16 hours a day (overnight and during meals), the savings are typically $30 to $60 per year per workstation.
Application three: kitchen counter appliances
Counter appliances with clocks or standby modes draw small but continuous power. Coffee makers with built-in clocks. Microwaves with displays. Toaster ovens with digital interfaces. Each one draws 1 to 5 watts continuously.
A smart plug for a single kitchen outlet, controlling two or three counter appliances, can save 5 to 15 watts of continuous draw. The schedule turns them off overnight and brings them back on in the morning before they are needed.
For the coffee maker specifically, the smart plug can also serve as the on-trigger. Schedule it to turn on at 6:30 AM, and the coffee starts brewing automatically (for coffee makers with a physical “on” button that stays pressed; many modern coffee makers do not work this way).
Application four: seasonal items
Items that are used only seasonally often get forgotten and continue drawing standby power year-round. Pool pumps. Hot tub heaters. Window air conditioners in winter. Space heaters in summer. Holiday lights.
Smart plugs for seasonal items prevent the off-season power draw. The plug stays on during the items active season and off the rest of the year. This is particularly useful for items like older window air conditioners that may continue drawing power for clocks or remote sensors even when “off.”
Application five: charging stations
Most modern chargers (phone chargers, laptop chargers, electric toothbrush chargers, cordless power tool chargers) draw small amounts of standby power when plugged in without a device. The amounts are small per charger (often under 1 watt), but a household with five or six chargers always plugged in can have 5 to 10 watts of standby draw from this category alone.
A smart plug for a “charging station” outlet, with all chargers plugged in, can be scheduled to provide power only during typical charging hours (overnight for phones, daytime for tools). The chargers are then completely off when no devices are charging.
What smart plugs cannot save money on
Several common applications do not actually save money:
- Lamps controlled by smart plugs save no money if you would have turned the lamp on and off manually anyway
- Refrigerators should not be on smart plugs (they need continuous power)
- Modern computers and laptops handle their own sleep efficiently and do not benefit from smart plug control
- Devices that have already been redesigned for low standby (newer TVs, modern speakers) save little when smart-plugged
- Smart plugs themselves draw small amounts of power (typically 1 to 2 watts), which offsets some of the savings
The lesson is to use smart plugs strategically for the high-draw phantom load categories, not as a general home automation tool. The wrong application produces convenience without savings.
Choosing the right smart plug
For pure savings purposes, the simplest smart plugs work fine. You do not need voice assistant integration, advanced scheduling, or energy monitoring features (though the monitoring features are useful for confirming actual savings).
Basic smart plugs from reputable brands cost $10 to $20 each. They support timed schedules, manual override, and basic app control. The payback period for a well-placed smart plug is usually two to six months in the entertainment center and home office applications.
Smart plugs with energy monitoring cost $20 to $35 and are useful for the first few months to verify which applications are actually saving money. After the pattern is established, basic plugs are fine for new applications.
The compound effect
A household with four to six well-placed smart plugs typically reduces overall electricity consumption by 5 to 10 percent. For a household with a $130 monthly electricity bill, that is $80 to $160 in annual savings, against an upfront cost of $50 to $100 in smart plugs. The payback is usually under a year, and the savings continue for the lifetime of the plugs (typically five to ten years).
The applications also require zero ongoing attention after setup. Schedules run automatically. The household experiences no difference in daily life. The savings happen quietly in the background.
For pairings, see our pieces on reading electricity bills and kitchen energy.
Sources this article draws on
Figures and definitions on this page reference the following authoritative sources for the Utility & Bill Savings category. Where a specific number is quoted, the corresponding source is the one it was checked against.
