Typical well pump power draw depends on pump type and depth

A household well pump typically uses between 750 and 2,200 watts while running, though the exact amount depends on whether you have a submersible pump (sits inside the well) or a jet pump (sits above ground). Submersible pumps usually draw 750 to 1,500 watts. Jet pumps often use 1,000 to 2,200 watts because they work harder to pull water up from depth. The deeper your well, the more power your pump needs—a 50-foot well demands less than a 300-foot well pulling the same volume of water.

Your pump does not run all the time. It cycles on when water pressure in your tank drops below a set point (usually around 40 pounds per square inch) and shuts off once pressure reaches the upper limit (usually around 60 psi). A typical household uses 80 to 100 gallons of water per day, which means your pump might run for 2 to 4 hours total across the whole day, spread over many short cycles. This cycling pattern is why your electric bill does not reflect the pump running at full power 24 hours a day.

Key Takeaways

  • Submersible pumps draw 750 to 1,500 watts; jet pumps draw 1,000 to 2,200 watts, depending on well depth and how far water must travel.
  • Your pump cycles on and off throughout the day rather than running continuously, so actual daily energy use is much lower than the nameplate wattage suggests.
  • The pump's pressure tank stores water so the pump does not restart every time you turn on a faucet, reducing the number of start cycles per day.
  • You can find your pump's exact wattage on the motor nameplate, usually a metal tag attached to the pump housing or control box.
  • Starting wattage (the surge when the motor first turns on) is often two to three times the running wattage and matters if you have a backup generator.

Where to find your pump's wattage rating

The most reliable number is on your pump itself. Look for a nameplate—a metal or plastic label attached to the motor or the control box above ground. It lists the horsepower (hp), voltage, and sometimes watts directly. If it shows horsepower instead, you can convert: 1 hp equals roughly 750 watts, so a 1.5 hp pump is approximately 1,125 watts at full load.

If you cannot find the nameplate or it is worn away, check your well service records or the original paperwork from when the pump was installed. Your well contractor or the pump manufacturer (if you know the brand) can also tell you the wattage based on the pump model number. Do not guess—the difference between a 1 hp and 2 hp pump is significant for your electric bill and for sizing a backup generator if you have one.

How pump size relates to your household demand

Well pumps are sized to meet your household's peak water use, not average use. Peak demand happens when multiple fixtures run at once—a shower, washing machine, and outdoor hose all going simultaneously. Most residential pumps are sized to deliver 10 to 20 gallons per minute, which requires a motor between 0.75 and 2 horsepower.

A larger household or one with high water demand (livestock, irrigation, multiple bathrooms) needs a bigger pump and therefore higher wattage. A small cabin with one bathroom might have a 0.75 hp pump (around 560 watts). A four-bedroom house with two bathrooms and a lawn might have a 1.5 hp pump (around 1,125 watts). The pump size was chosen when your system was designed, so if you want to know whether yours is typical, compare its horsepower to your household size.

Starting wattage versus running wattage

When your pump motor first starts, it draws significantly more power than it uses while running steadily. This inrush current or starting wattage typically peaks at two to three times the running wattage for the first few seconds. A 1,500-watt pump might draw 3,000 to 4,500 watts at the moment it switches on.

This matters most if you have a backup generator or solar power system. Your electrical panel and wiring are sized to handle this surge, so it is not a problem for grid-connected homes. But if you are running on a generator during an outage, the generator must be large enough to handle the starting surge, not just the running wattage. A generator rated for 5,000 watts can start a 1,500-watt pump, but a 2,000-watt generator cannot.

How to estimate your pump's daily energy use

To calculate kilowatt-hours (kWh) per day, you need three numbers: the pump's running wattage, how many hours it runs per day, and the number of days. Most household well pumps run between 2 and 4 hours per day total, though this varies widely based on household size, water pressure settings, and seasonal use.

Here is a worked example: a 1,500-watt pump running 3 hours per day uses 4.5 kWh per day (1,500 watts ÷ 1,000 × 3 hours = 4.5 kWh). Over 30 days, that is 135 kWh. At an average electricity rate of $0.14 per kWh, the monthly cost would be roughly $19. If your pump runs longer—say, 4 hours per day—the cost rises to about $25 per month. These are estimates; your actual use depends on your local water table, pressure tank size, and household consumption.

When a pump uses more power than expected

If your electric bill has risen sharply and you have not changed your water use, your pump may be working harder than it should. Common causes include a pressure tank that has lost its air charge (the tank has a rubber bladder or air valve that can fail), a leak in the water line that causes the pump to cycle more often, or sediment or mineral buildup inside the pump that increases friction.

A pressure tank that has lost its air charge forces the pump to start and stop more frequently because the tank cannot store water pressure effectively. A small leak—even one you cannot see, like a slow drip in an underground line—causes the pump to run longer each day to maintain pressure. Both situations increase your daily run time and your electric bill. If you suspect either problem, have a well service technician inspect the system; the cost of a service call is usually less than a month of wasted energy.

Pump efficiency and age

Older pumps are less efficient than newer ones, meaning they use more watts to deliver the same amount of water. A pump installed 20 or 30 years ago may use 10 to 20 percent more energy than a modern replacement. If your pump is nearing the end of its lifespan (typically 15 to 25 years depending on water quality and use), replacing it with a high-efficiency model can lower your electric bill noticeably.

Efficiency improvements come from better motor design and improved pump internals that reduce friction. A new 1.5 hp pump might use 1,050 watts instead of 1,200 watts for the same output. Over a year, that difference adds up. If you are considering replacement, ask your well contractor for the efficiency rating of the new pump and compare it to your current model's nameplate data.

Frequently Asked Questions

Can I run my well pump on a generator during a power outage?

Yes, if the generator is large enough. Your generator must handle the starting wattage (the surge), not just the running wattage. A 1,500-watt pump with a 3,000-watt starting surge needs a generator rated for at least 5,000 watts. Check your pump's nameplate and multiply the running wattage by 2.5 to find the minimum generator size.

Does a deeper well always mean higher electric bills?

Usually yes. A deeper well requires the pump to work harder to lift water, so it draws more power. A 200-foot well pump uses noticeably more watts than a 50-foot well pump of the same size. However, your total bill also depends on how much water you use daily, so a shallow well serving a large household might cost more to operate than a deep well serving a small one.

What is the difference between a 1 hp and 1.5 hp well pump in terms of electricity use?

A 1 hp pump uses roughly 750 watts, while a 1.5 hp pump uses roughly 1,125 watts—a difference of about 375 watts. If both run 3 hours per day, the 1.5 hp pump costs roughly $5 to $7 more per month to operate, depending on your local electricity rate. The larger pump is necessary only if your household demand requires it.

Why does my pump run more in summer than winter?

Increased outdoor water use (lawn watering, garden hoses, pools) in summer causes the pump to cycle more often and run longer each day. Winter use is typically limited to indoor fixtures, so the pump runs fewer hours. This is normal and expected; your bill should reflect the seasonal difference.

Should I turn off my well pump when I leave home for a week?

No. Turning off the pump and then restarting it can damage the system and is unnecessary. The pump only runs when water pressure drops, so if no one is using water, it will not cycle on. Leaving it on costs almost nothing and keeps the system ready. Only turn it off if you are doing maintenance or if a professional advises it.