Pool Cost of Ownership
A full annual cost-of-ownership breakdown for your pool — chemicals, energy, water, repairs, and depreciation — so you know what it really costs each year.
Safety
A realistic mid-range estimate — not a quote. Actual annual cost can swing 30% in either direction based on equipment age, local utility rates, swimmer load, weather, and how strict you are with chemistry. Heater operation is the single biggest variable: an unheated pool in a warm climate runs ~$1,200/yr; a heated in-ground pool in a cold climate can exceed $5,000/yr.
An unheated 20,000-gallon in-ground pool in a mixed climate runs about $2,200 a year on DIY maintenance and $4,400 with a pool service. Adding gas heat puts those at roughly $3,400 and $5,600. The annual figure is four running lines — maintenance, heating, opening and closing, and a repair reserve for equipment that fails on a schedule — plus the amortised build cost if you want the true number.
The Full Annual Cost of Owning a Pool
Five things make up a pool's annual cost: routine maintenance (chemicals, electricity, water top-off), heating, opening and closing for seasonal climates, a repair-and-replacement reserve, and — if you want a real-world budget — the amortised capital cost of the pool itself. A typical unheated 20,000-gallon in-ground pool in a mixed climate with DIY maintenance runs $2,000–3,000 per year. Add a gas heater and that jumps to $3,500–5,000. Switch to a pool service and add another $1,800–2,400. The point of this calculator is to set realistic expectations before you sign for a pool — or to find the biggest leak in your existing budget.
For the same model run across every pool size, climate and equipment combination — with the rates and assumptions written out — see the reference page: What a Pool Actually Costs Per Year.
Typical Annual Cost by Setup
| Setup | DIY | Pro Service |
|---|---|---|
| Above-ground 12k gal, no heater | ~$1,200/yr | ~$3,100/yr |
| In-ground 20k gal, no heater, mixed climate | ~$2,200/yr | ~$4,400/yr |
| In-ground 20k gal, gas heat, mixed climate | ~$3,400/yr | ~$5,600/yr |
| In-ground 30k gal, gas heat, cold climate | ~$4,800/yr | ~$6,700/yr |
What the "Repair Reserve" Line Actually Covers
Pool equipment fails on a predictable schedule and most owners get caught out by it. A pump motor lasts 8–12 years and costs $700–1,200 to replace. A cartridge filter element lasts 3–5 years at $80–200. A sand filter's media needs replacing every 5–7 years at $150–300. A gas heater lasts 8–10 years and costs $2,500–4,000 installed; a heat pump lasts 10–15 years and costs $3,500–6,000. A vinyl liner lasts 8–12 years and costs $1,500–3,000 to replace. Plaster on a concrete pool lasts 10–20 years and costs $5,000–15,000 to redo. The reserve line spreads those known replacements across the years between them so the bill doesn't arrive as a surprise.