How Much Does It Cost to Run a Pool Pump?
A standard 1.5 HP single-speed pool pump draws about 1,500 watts. At the 2024 US average rate of $0.16/kWh, that is $0.24 per hour, $1.92 for an 8-hour filtration day, and $57.60 a month at that schedule. Run the pump 24 hours a day and the same pump costs $173a month — pool pumps are one of the most expensive appliances in many homes, and they don't need to be.
Want the cost for a different pump size or your exact rate? Use the appliance cost calculator or compare a pool pump against other big-ticket loads on the efficiency rankings.
The Formula
Cost = (watts ÷ 1,000) × hours per day × days × price per kWh
Dividing watts by 1,000 converts to kilowatts. Multiplying by hours gives kilowatt-hours (kWh) — the unit your utility bills you in. For a pool pump labeled in horsepower, watts ≈ HP × 746.
Worked example (1.5 HP / 1,500W pump, 8 h/day, 30 days, $0.16/kWh): (1,500 ÷ 1,000) × 8 × 30 × 0.16 = 1.5 kW × 240 hours × $0.16 = $57.60 per month.
Monthly Cost by Hours of Use
For a 1.5 HP / 1,500W single-speed pool pump over a 30-day month at $0.16/kWh. Most residential pools only need 6-8 hours of filtration a day — anything beyond that is mostly wasted electricity.
| Hours per day | kWh per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 6h | 9.0 | $1.44 | $43.20 | $526 |
| 8h (typical schedule) | 12.0 | $1.92 | $57.60 | $701 |
| 12h | 18.0 | $2.88 | $86.40 | $1051 |
| 24h (continuous) | 36.0 | $5.76 | $172.80 | $2102 |
Cost by Pump Type and Size
Pump wattage varies wildly between a slow-running variable-speed model and a 2 HP single-speed pump. This table assumes 8 hours a day at $0.16/kWh. The variable-speed row is the biggest single saving available to most pool owners.
| Pump type | Watts | Cost per hour | Cost per month | Cost per year |
|---|---|---|---|---|
| Variable-speed (low filtration) | 250 | $0.04 | $9.60 | $117 |
| 1 HP single-speed | 1,000 | $0.16 | $38.40 | $467 |
| 1.5 HP single-speed (baseline) | 1,500 | $0.24 | $57.60 | $701 |
| 2 HP single-speed | 2,000 | $0.32 | $76.80 | $934 |
Monthly Cost by Electricity Rate
Your electricity rate makes a big difference. This table shows the monthly cost of a 1.5 HP / 1,500W pump across common US rates. Pool-heavy states like Florida, Arizona, and California often have time-of-use rates — running off-peak can cut these numbers further.
| Rate ($/kWh) | 6h/day | 8h/day | 12h/day | 24h/day |
|---|---|---|---|---|
| $0.10 | $27.00 | $36.00 | $54.00 | $108.00 |
| $0.13 | $35.10 | $46.80 | $70.20 | $140.40 |
| $0.16 (US avg) | $43.20 | $57.60 | $86.40 | $172.80 |
| $0.20 | $54.00 | $72.00 | $108.00 | $216.00 |
| $0.30 | $81.00 | $108.00 | $162.00 | $324.00 |
Monthly figures assume a single-speed 1.5 HP pump. A variable-speed pump runs at ~250-500W most of the day, cutting these figures by 60-80%.
Why Pool Pumps Cost What They Do
It is the runtime, not the horsepower
A pool pump is one of the few large appliances that often runs 8-24 hours a day, every day. At 1,500W that is the equivalent of leaving 15 incandescent bulbs on all day. Cutting runtime from 12 hours to 8 hours saves the same as turning off a window AC.
Single-speed pumps are sized for the worst-case flow
A single-speed pump has only one setting — full blast — but the pool actually only needs that much flow when you are vacuuming or running a feature. The rest of the time you are paying for 4-6x the flow you actually need. That is the fundamental reason variable-speed pumps save so much.
Pool pump energy scales with the cube of speed
Cutting a pump's speed in half reduces its power draw to roughly 1/8 — and only doubles the runtime to get the same water turnover. The math says a slow variable-speed pump running 12 hours uses far less electricity than a single-speed pump running 6 hours.
Tips to Lower Your Cost
Add a timer if you don't have one
Going from 24/7 to 8 hours a day cuts the bill by 67%. A $20 timer pays for itself in the first month.
Upgrade to a variable-speed pump
Typical savings are $200-$400 a year. Some utilities offer rebates of $200-$500 toward the upgrade.
Use a solar cover
Less debris and evaporation means less filtration and less topping off. Cuts effective pump runtime needed by 20-30%.
Clean the skimmer and pump basket
A clogged basket makes the pump work harder and circulate less. Five minutes of cleaning each week. See our energy savings guide.
Recommended picks
Cut Your Pool Electricity Bill
Pool pumps are big enough that even small changes add up to real money. Timers, covers, and especially variable-speed pumps each attack a different piece of the runtime equation.
Variable-Speed Pool Pump
Biggest single-step savings
A VS pump runs slow for filtration and only ramps up for vacuuming. Most homeowners cut pool electricity 50-75% versus a single-speed pump.
Pool Pump Timer
Schedule runtime
A simple mechanical or smart timer keeps the pump from running 24/7. Most pools only need 6-8 hours a day of filtration, not 24.
Solar Pool Cover
Reduce filtration demand
A solar cover cuts evaporation and debris by 90%+, which means less skimming and less pump runtime — plus it warms the water for free.
Pool Cleaning Robot
Skip the pump-driven cleaner
A standalone electric robot uses ~150W and runs 2-3 hours, replacing a suction or pressure-side cleaner that forces the main pump to run hours longer.
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Frequently Asked Questions
How much does it cost to run a pool pump?
A typical 1.5 HP single-speed pool pump draws about 1,500W. At the 2024 US average rate of $0.16/kWh, that is $0.24 per hour. Running 8 hours a day for a 30-day month costs roughly $57.60. Over a full pool season (May-September), a single-speed pump can cost $300-$500 in electricity — often the single largest seasonal appliance bill in a home.
Do I really need to run my pool pump 24 hours a day?
No — and this is the most common pool-cost mistake. Most residential pools only need to turn over the water volume once a day, which takes 6-8 hours on a properly sized pump. Running 24/7 costs 3-4x more without making the water meaningfully cleaner. A $20 timer pays for itself in the first month.
Is a variable-speed pump worth the money?
Almost always, yes. A variable-speed (VS) pump runs slow most of the day (250-500W) and only ramps up for vacuuming or features. Homeowners typically cut pool electricity 50-75%, saving $200-$400 a year. At a $1,000-$1,500 upgrade cost, the payback is usually 2-4 years. Several states now require VS pumps on new installs for this reason.
Should I run the pump during the day or at night?
Daytime is better for sanitation — chlorine is consumed faster in sunlight, so circulating during the day keeps chlorine evenly distributed where you need it. Night-only runs (popular for off-peak rates) can lead to algae growth. If your utility has time-of-use rates, split the runtime: a few hours mid-morning and a few hours late evening usually beats overnight-only.
How do I calculate my own pool pump cost?
Use this formula: cost = (HP × 746 ÷ 1,000) × hours per day × days × price per kWh. The 746 converts horsepower to watts (1 HP ≈ 746W). For a 1.5 HP pump running 8 hours a day at $0.16/kWh: (1.5 × 746 ÷ 1,000) × 8 × 30 × 0.16 ≈ $43/month. If your pump label lists amps and volts instead of horsepower, watts = amps × volts.