Equipment

Pool Maintenance Cost Calculator

Estimate the monthly running cost of your pool — chemicals, electricity, water, and service — from pool size, sanitizer type, and local utility rates.

Pool Maintenance Cost Calculator
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Estimates are approximate. Actual costs vary with local utility rates, climate, swimmer load, pool cover use, and equipment efficiency. A pool cover cuts chemical use by 35–50% and water loss by ~70%. Variable-speed pumps reduce electric cost by 60–80% vs single-speed.

Quick answer

A typical 15,000-gallon pool costs $80–150 a month to maintain yourself during the season, or $200–350 with a full-service company. Chemicals and pump electricity are roughly 35–40% each. The two levers that actually move the number are a variable-speed pump (60–80% less electricity) and a cover (35–50% less chemical use).

What Pool Maintenance Actually Costs

A typical 15,000-gallon residential pool costs $80–150 per month during the active season to run yourself, or $200–350 per month with a full-service company. The big variables are pump electricity (often the largest single line item), chemical type (salt-water pools cost less to dose but the SWG cell amortises into the monthly figure), and how often you have to top off from evaporation. This calculator breaks the number down so you can see where the money goes — and where it's worth changing equipment.

Monthly maintenance is one line of the annual total. For the whole picture — repair reserve, opening and closing, heating — see What a Pool Actually Costs Per Year.

Typical Monthly Cost by Pool Size (DIY chlorine)

Pool Size Chemicals Electric Total (active mo.)
10,000 gal ~$30 ~$35 ~$85
15,000 gal ~$45 ~$35 ~$105
25,000 gal ~$75 ~$55 ~$155
40,000 gal ~$120 ~$75 ~$225

Where the Money Actually Goes

For most DIY chlorine pools running an 8-hour single-speed pump cycle, electricity and chemicals each account for ~35–40% of monthly cost, water top-off ~5%, supplies (test strips, brush heads, replacement gaskets) ~10–15%. The two biggest opportunities to cut the bill are a variable-speed pump (60–80% less electricity than single-speed for the same flow) and a pool cover (chemical use drops 35–50%, water loss drops ~70%). A salt-water pool reduces chemical spending by roughly a third, but the salt cell is consumable — a $500–800 cell replaced every 3–5 years works out to $10–20/month of hidden cost.

Frequently Asked Questions

Is a salt-water pool really cheaper to maintain?
On chemicals — yes, roughly 25–35% less per year, because the salt cell generates chlorine on demand instead of you buying jugs of liquid chlorine. But the salt cell wears out and costs $400–800 to replace every 3–5 years. After amortising the cell, the total chemistry cost is closer to 15–25% less than a traditional chlorine pool — meaningful, but not dramatic. The bigger benefit is convenience (less manual dosing, no chlorine smell), not raw cost.
How much can a variable-speed pump actually save?
60–80% off the pump electricity bill is realistic. The energy a centrifugal pump consumes scales with the cube of the speed — halve the RPM and you use roughly one-eighth the power for the same hours. A 15,000-gallon pool running an 8-hour cycle on a single-speed 1 HP pump uses ~$35/month of electricity at $0.13/kWh; the same pool on a variable-speed pump at half speed for 16 hours (same daily turnover) uses ~$10–12/month. Payback on the pump itself is usually two to four seasons — the variable speed pump payback calculator works out yours exactly.
Does the cost include opening and closing the pool?
No — this calculator covers active-season recurring costs. Opening and closing add $200–500 per event if a service does it, $20–60 in chemicals if you do it yourself. For the full picture including opening, closing, repairs, and capital costs, use the Pool Cost of Ownership calculator.