A typical household well pump uses 300 to 2,000 watts while running, and draws power for 2 to 8 hours per day depending on household size and water demand

The actual electricity cost depends on three things: the wattage of your pump, how long it runs each day, and your local electricity rate. A 1-horsepower pump (the most common residential size) draws roughly 750 to 1,000 watts. If it runs 4 hours daily and your electricity costs $0.12 per kilowatt-hour, you are looking at roughly $15 to $20 per month, or $180 to $240 per year. Larger homes with higher water demand may see double that.

The pump itself is not the only power draw. Your pressure tank, pressure switch, and any treatment systems (like a chlorinator or UV light) also consume electricity, though usually much less than the pump. If you have a submersible pump deep in the well, it uses more energy to push water up a longer distance than a shallow jet pump would.

Key Takeaways

  • A 1-horsepower well pump typically uses 750 to 1,000 watts while the motor is running, which translates to roughly $15 to $20 per month on an average household electric bill.
  • How long your pump runs each day depends on household size, water usage habits, and the size of your pressure tank — larger tanks mean the pump cycles on less often.
  • Submersible pumps (which sit inside the well) use more electricity than jet pumps because they must push water up from greater depth.
  • Pressure tanks, pressure switches, and water treatment systems add small amounts to your total electricity use but rarely exceed 10 percent of the pump's draw.

How pump size and depth affect power consumption

Well pumps come in different horsepower ratings, and each draws a different amount of current. A 0.75-horsepower pump draws roughly 600 watts; a 1.5-horsepower pump draws around 1,200 watts; a 2-horsepower pump can draw 1,500 to 2,000 watts. Your pump's size was chosen based on the depth of your well and the flow rate your household needs.

Depth matters significantly. A submersible pump 100 feet down must work harder to lift water than one 30 feet down, so it draws more current for the same flow rate. If you have a shallow well with a jet pump, your electricity use will be lower than a household with a deep well and a submersible pump, even if both homes use the same amount of water.

You can find your pump's horsepower and wattage on the motor nameplate, usually a metal tag bolted to the pump or pressure tank. If the nameplate is missing or illegible, your well contractor or pump manufacturer can tell you the specifications based on your well depth and pump model number.

How pressure tank size changes daily runtime

Your pressure tank acts as a buffer. When you turn on a faucet, water comes from the tank first. Once pressure drops to a set point (usually around 30 pounds per square inch), the pump switches on and refills the tank until pressure reaches the upper limit (usually around 50 psi). Then the pump shuts off and waits for pressure to drop again.

A larger pressure tank means the pump cycles on less often because it takes longer for household use to deplete the stored water. A 20-gallon tank in a family of four might cycle the pump on every 30 to 45 minutes; an 80-gallon tank might cycle it on every 2 to 3 hours. Fewer cycles mean lower daily runtime and lower electricity use.

If your pump is cycling on very frequently (every 10 to 15 minutes), your pressure tank may be waterlogged or undersized, or you may have a slow leak somewhere in the system. A waterlogged tank or leak will drive up electricity use significantly because the pump runs more often to maintain pressure. A well pump professional can test your tank and diagnose the problem.

Calculating your monthly and annual electricity cost

To estimate your well pump's electricity cost, you need three numbers: the pump's wattage (from the nameplate), your average daily runtime in hours, and your local electricity rate in dollars per kilowatt-hour. Your electricity bill shows your rate; it is usually between $0.10 and $0.18 per kilowatt-hour depending on your region and utility company.

The formula is: (Wattage ÷ 1,000) × Hours per day × Days per year × Rate per kilowatt-hour = Annual cost. For example, a 1,000-watt pump running 4 hours daily at $0.12 per kilowatt-hour costs (1,000 ÷ 1,000) × 4 × 365 × $0.12 = $175 per year.

If you want a more precise number, you can install a clamp meter (a non-invasive tool that measures current) on the pump's electrical line and record how many hours it actually runs over a week, then multiply that by 52. Many electricians will do this measurement for a small fee if you ask.

Why your pump might use more electricity than expected

If your electricity bill has spiked and you suspect the well pump, look for these common culprits. A slow leak in your plumbing—even one you cannot see, like a crack in an underground line or a leaking toilet fill valve—forces the pump to run longer to maintain pressure. A waterlogged pressure tank (one that has lost its air charge) causes rapid pressure swings and frequent pump cycling. A failing pump motor may draw more current than a healthy one as internal friction increases.

Sand or sediment in the pump intake can also increase resistance and cause the motor to draw more current. If your well water is sandy or your well is shallow, sediment can accumulate over time. A well professional can inspect the pump and intake screen and clean or replace them if needed.

Electrical problems on the supply side are less common but possible. A loose connection at the breaker or a corroded ground wire can cause the motor to work harder. If you suspect an electrical issue, have a licensed electrician inspect the pump's power supply and grounding.

Ways to reduce well pump electricity use

The most effective way to lower electricity use is to reduce water demand. Shorter showers, fixing leaks promptly, and installing low-flow fixtures reduce the volume the pump must deliver, which means shorter runtime and lower bills. A single running toilet can waste 200 gallons per day and force your pump to run almost constantly.

If your pressure tank is undersized or waterlogged, upgrading or recharging it will reduce cycling frequency and runtime. A well pump professional can test the tank's air charge and either recharge it (if it is a standard tank) or recommend replacement (if it is permanently damaged).

Keeping your pump and intake screen clean prevents sediment buildup that increases motor load. If you have a shallow well or sandy soil, schedule a professional cleaning every 3 to 5 years. Maintaining proper water pressure settings—not pushing the upper limit higher than necessary—also reduces stress on the motor and electricity use.

Variable-frequency drive (VFD) pumps are newer technology that adjusts motor speed to match demand instead of running at full power and cycling on and off. They can reduce electricity use by 20 to 40 percent compared to standard pumps, but they cost more upfront and require a professional to install. This is a long-term investment that makes sense if your current pump is failing or if your electricity costs are very high.

When to call a well pump professional

If your electricity bill has risen sharply and you cannot find a leak, or if your pump is cycling on and off much more frequently than it used to, call a well pump contractor. They can measure your pump's actual runtime, test your pressure tank, inspect for leaks, and check the pump's electrical draw to see if the motor is failing.

Do not try to adjust pressure switch settings yourself unless you have done it before. Incorrect settings can damage the pump or leave you without water pressure. A professional can adjust the settings safely and confirm the tank is sized appropriately for your household.

Frequently Asked Questions

Does a well pump run all the time?

No. A well pump cycles on and off based on water pressure in the tank. It runs when pressure drops below the lower setpoint (usually 30 psi) and stops when pressure reaches the upper setpoint (usually 50 psi). In a typical household, this means 2 to 8 hours of runtime per day spread across multiple short cycles.

How much does it cost to run a well pump for a year?

For a 1-horsepower pump in an average household, expect $180 to $240 per year. This varies based on pump size, well depth, water usage, and your local electricity rate. A larger pump or deeper well can cost $300 to $500 annually; a smaller pump in a low-usage household might cost $100 to $150.

Is a submersible pump more expensive to run than a jet pump?

Yes, typically. Submersible pumps must push water up from depth, so they draw more current than shallow jet pumps. However, submersible pumps are more efficient at greater depths, so the comparison depends on your well depth. A deep well with a submersible pump may actually cost less to run than a shallow well with an inefficient jet pump.

Can I reduce my well pump electricity use by adjusting the pressure tank?

Indirectly, yes. A larger pressure tank or one that is properly charged will reduce how often the pump cycles, which lowers runtime. However, you cannot straightforward adjust tank size yourself—you would need to replace the tank, which requires a professional. A well pump contractor can evaluate whether a larger tank would help your situation.

What is the difference between a 1-horsepower and a 1.5-horsepower pump in terms of electricity cost?

A 1.5-horsepower pump draws roughly 200 to 400 more watts than a 1-horsepower pump. If both run the same number of hours daily, the larger pump costs about 25 to 40 percent more per month. However, a larger pump may cycle less frequently if it delivers water faster, which can offset some of the higher wattage.