Your pool pump runs for hours every day, all season, which makes it the single biggest electricity user in most pool setups. The good news: the cost is easy to calculate, and easy to cut once you know the numbers.
This guide shows you the simple formula, walks through a real example, and explains why a variable-speed pump is the biggest money-saver in pool equipment.
Running cost comes down to three things: how much power your pump draws (watts), how long you run it (hours), and what your utility charges (dollars per kilowatt-hour).
Don't know your pump's wattage? It's on the motor label, or estimate it as horsepower × ~750 (so a 2 HP pump is roughly 1,500 watts). The US average electricity rate is about $0.17 per kWh, but check your bill for your real rate.
Take a common single-speed pump: 1,500 watts (about 2 HP), run 8 hours a day, at $0.17/kWh. That's 1.5 kW × 8 hours = 12 kWh per day, or about $2.04 a day. Over a 5-month season that's roughly $306 — and run year-round it's about $745. For many homes, the pool pump alone is a noticeable chunk of the summer power bill.
Variable-speed pumps cost more upfront than single-speed models, but they typically pay for themselves in energy savings, often within a season or two, and many utilities offer rebates for them.
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Biggest Energy Saver
The single best upgrade for cutting pump running costs. Running at a low speed for longer moves the same water for a fraction of the energy of a single-speed pump at full blast. Often pays for itself in a season or two, and may qualify for a utility rebate.
Best for Automating Run Time
If you're on a single-speed pump, a timer is the cheapest way to cut costs, it stops you over-running the pump and lets you target off-peak hours automatically.
Most pools need about 8 to 12 hours of circulation a day to turn the water over, and often you can get away with less. Running 24/7 is usually unnecessary and wastes money.
For most owners, yes. The energy savings are substantial because power draw falls sharply at lower speeds. The higher purchase price is typically recovered within a season or two, especially with a utility rebate.
Check the motor's label or nameplate for watts or amps. If it only lists horsepower, estimate watts as roughly HP × 750 (a 1.5 HP pump ≈ 1,100 W, a 2 HP pump ≈ 1,500 W).
Run the numbers on your own pump with the calculator above, most owners are surprised how much it adds up. The two best ways to cut the bill: run the pump only as long as you actually need (8–12 hours), and upgrade to a variable-speed pump, which is the biggest single energy saver in pool equipment.