Expect to spend roughly $950 to $2,400 a year maintaining an inground pool in 2026, depending mostly on what it's made of: fiberglass sits at the low end (~$950/yr), vinyl in the middle (~$1,400/yr plus a liner fund), and concrete at the top (~$2,400/yr). Features add more, a heater runs about $650 a year, a spa about $400.
The build price gets all the attention, but upkeep is the number that follows you for decades. This guide breaks down where the money actually goes, and, more usefully, shows the 10-year total cost of ownership, where the rankings shift in ways that surprise people.
Annual upkeep by construction type
| Pool type | Base upkeep / year | Hidden extra | True annual figure |
|---|---|---|---|
| Fiberglass | ~$950 | , | ~$950 |
| Vinyl liner | ~$1,400 | Liner replacement every 7–10 yrs ($3,400–$6,800), ~$625/yr set aside | ~$2,000 |
| Concrete / gunite | ~$2,400 | Periodic acid washing; resurfacing eventually | ~$2,400+ |
Why the spread? Fiberglass gel-coat is smooth and nearly inert, algae struggles to grip it and it doesn't alter water chemistry, so it needs the least chemical correction. Concrete's porous, alkaline surface does the opposite: it feeds chemical demand, invites algae into microscopic pores, and needs occasional acid washing. Vinyl sits between, but the liner is a wearing part with a real replacement bill. The full comparison of all three materials is in the vinyl vs. fiberglass vs. concrete guide.
Where the money goes
- Chemicals, chlorine or salt-cell balance, pH control, algaecide, shock. The biggest recurring line for most owners, and the one that varies most by pool surface.
- Electricity, the pump is the quiet cost, cycling hours every day, all season. Variable-speed pumps trim this meaningfully.
- Water, evaporation and splash-out top-ups. An uncovered pool in a dry climate loses a startling amount.
- Opening and closing, a cold-climate line item; warm-state owners skip it but run their systems more months instead.
Features change the bill
From the calculator's running-cost model:
- Heater: ~$650/yr in fuel or electricity for typical seasonal use.
- Attached spa: ~$400/yr, it's kept hotter and cycled more.
- Diving deep end: ~$200/yr, more water to treat, filter, and heat. (It also adds ~20% to the build.)
See build cost and yearly upkeep together. The calculator shows both numbers for your exact configuration, side by side.
Try the pool cost calculator →The 10-year picture: where rankings shift
Here's the math most buyers never do, upfront cost (16 × 32 ft pool, Midwest baseline) plus ten years of upkeep from the table above:
| Pool type | Upfront (likely) | 10 yrs of upkeep | 10-year total |
|---|---|---|---|
| Vinyl liner | ~$52,500 | ~$20,300 | ~$73,000 |
| Fiberglass | ~$74,000 | ~$9,500 | ~$83,500 |
| Concrete / gunite | ~$94,000 | ~$24,000 | ~$118,000 |
Three things jump out:
- Vinyl stays cheapest overall, but its lead shrinks. A $21,500 upfront advantage over fiberglass narrows to about $10,500 over a decade, and keeps narrowing every year after (the second liner replacement lands in years 14–20).
- Fiberglass closes the gap on autopilot. Its ~$950/yr upkeep is less than half of vinyl's true figure, and it demands the least of your time, the closest thing to a low-effort pool. The fiberglass cost breakdown goes deeper.
- Concrete costs the most twice. Highest build, highest upkeep. You pay that premium for something real, any shape, any depth, decades of structure, but go in with the full number, not the sticker.
DIY vs. hiring a weekly service
The figures above assume you handle routine care yourself: testing water a couple of times a week, dosing chemicals, emptying skimmer baskets, running the vacuum. Realistically that's an hour or two a week in season. A weekly pool service replaces your time with their labor, pricing varies a lot by market, so if you're weighing it, get two or three local quotes and add that to the annual figure rather than trusting a national average.
Decisions that cut lifetime cost, before you build
- Go smaller or shallower. Every square foot and gallon is water you'll treat, filter, and heat for decades. A shallow play-pool profile trims about 5% off the build and keeps trimming upkeep after.
- Pick the surface for the upkeep you'll tolerate, the annual gap between fiberglass and concrete (~$1,450/yr) compounds to ~$14,500 over a decade.
- Add a cover. Even a manual cover ($1,000–$3,600) cuts evaporation, the main way pools lose water and heat. An automatic cover ($8,000–$20,000) does it without the nightly ritual.
- Consider a variable-speed pump and LED lighting, small line items at build time that quietly shave the electric bill every month.