Owning a pool in Collin County costs roughly two to three times the monthly service rate, because service is only one of five cost lines. The other four are chemicals, electricity, water, and a reserve for the things that wear out.
The reserve is the line that surprises owners, because it arrives all at once in a year you didn’t choose. Resurfacing alone, taken at the middle of the DFW range ($10,500) and divided across ten years, comes to nearly $90 a month. How soon that bill arrives depends partly on you. The National Plasterers Council says “maintaining the proper initial and ongoing pool water chemistry … and regular equipment maintenance are vital to achieve the anticipated lifespan of the finish.” The water you keep sets how often that bill comes due, and it is the line most cost articles leave out.
Each line below is worked out for the pool we service most often. It is plaster, roughly 15,000 to 20,000 gallons, with no spa or a small attached one and moderate tree cover, and it runs a variable-speed pump, a cartridge filter, and either a salt system or tablets. If yours is bigger, shaded, heated, or twenty years old, the arithmetic holds and the numbers move.
Line one: service
Published pool service rates around DFW run from about $120 to $220 a month. The band is wide because of what is inside the number: whether chemicals are included, whether filter cleans are bundled, whether vacuuming happens every visit, and what size band your pool falls in. The statewide Texas average quoted around the internet, roughly $198 a month, is a service-and-chemicals figure, so it measures one and a half of the five lines.
Compare two service quotes annually rather than monthly, the case our guide to what your monthly bill covers makes. If you do the work yourself this line is zero and the chemical line below roughly doubles, because you won’t be buying at trade prices. Our DIY versus hiring comparison works through that trade.
Line two: chemicals
Commonly published figures put residential pool chemicals around $50 to $125 a month nationally. Local conditions push a Collin County pool toward the upper half of that for four months of the year and toward the bottom for four others.
- UV load. Sunlight destroys free chlorine, and in our experience a July pool can consume roughly twice what the same pool used in a mild June week.
- Water temperature. Algae reproduction accelerates steeply as water warms. A pool sitting in the low 90s is a materially different chemical problem from the same pool at 78.
- Fill water hardness. NTMWD treated water is moderately hard, and a pool concentrates it further every summer. That doesn’t cost you chlorine, but it does drive acid demand and the occasional water exchange. See what hard water does to a whole pool.
Winter chemical costs are low. Below 60 degrees a pool consumes little chlorine and a two-week testing interval is adequate, which is why, on a pass-through chemical model, your August bill and your February bill don’t resemble each other.
Line three: electricity
Published ranges for pool electricity run roughly $30 to $150 a month, and that spread is almost entirely the pump. Nothing else on a normal pad runs long enough to matter, unless you have a heat pump, in which case it dwarfs everything.
Why the pump you own matters more than the hours you run
Pump flow falls roughly in proportion to speed, but power draw falls with roughly the cube of speed. Halving the speed moves about half the water for something near an eighth of the power, so running twice as long at half speed delivers the same daily turnover for around a quarter of the energy. That’s why a single-speed pump can sit at the top of the published range while a properly programmed variable-speed pump sits near the bottom.
There’s no Oncor rebate to wait for
Oncor publishes no residential variable-speed pool pump rebate. Entergy Texas does run a distributor program worth up to $350 per qualified pump, but that’s a different service territory and most of Collin County isn’t in it. The upgrade has to justify itself on the energy math alone, and for most pools it does. Our variable speed guide shows the working.
Line four: water
Published estimates put pool water at roughly $20 to $70 a month, and evaporation puts a Collin County pool at the top of that band in summer. The commonly quoted rule of thumb is a quarter inch of evaporation a day, but that comes from milder conditions than ours. In a North Texas summer, with afternoons near or past 100 degrees and wind, half an inch a day is ordinary. On a 15-by-30-foot pool that is roughly 140 gallons a day, or close to a thousand gallons a week, and nothing is wrong. Splash-out, water features, and backwashing a sand filter add to it.
An autofill valve makes evaporation invisible, which is convenient until it hides a leak, so a summer water bill that jumps sharply is worth the bucket test rather than a shrug.
City watering rules are widely misreported. The City of Plano says that variances aren’t required for filling pools; its twice-weekly schedule and its 10am to 6pm sprinkler ban govern irrigation, not pools. The directory sites that rank for this question get Plano wrong, so confirm your own city’s current ordinance with the city, and check whether a drought stage is in effect before any large fill.
Line five: the replacement reserve
Everything on a pool pad is a wear item with a finite life, and ignoring that doesn’t make it free. The fix is arithmetic: take a realistic replacement cost, divide by a realistic service life, and carry the result as a monthly reserve.
| Item | Typical life here | How to think about the reserve |
|---|---|---|
| Variable-speed pump | 8 to 12 years | Replacement divided by ten years |
| Salt cell | 3 to 6 years | Take the installed price and spread it over four or five years |
| Filter cartridges | 3 to 5 years | A set every few years, the cheapest line here |
| Sand media | 5 to 7 years | Infrequent, modest |
| DE grids | 5 to 10 years | Infrequent, modest |
| Gas heater | 5 to 10 years | Only if you have one, and it’s a large number |
| Plaster resurface | 7 to 12 years | $6,000 to $15,000 in DFW by size and finish; standard plaster roughly $6.50 to $8.00 per square foot of interior surface, floor and walls, not water surface |
| Filter deep cleans | Every 3 to 6 months | $125 to $150 each, so a real recurring line |
Run that division for your own pool and the number is uncomfortable, which is the point. Our equipment lifespan guide covers why our climate pushes each of these lives toward the short end.
The Collin County wrinkle: don’t plan on draining
Some maintenance advice assumes an occasional full drain and refill as a reset. Our expansive clay holds groundwater that exerts real upward pressure on an empty shell, which can lift or crack it, and that’s a structural repair rather than a resurface. Staged partial exchanges are the local answer, and they cost water rather than risk. What clay soil does to a pool covers the wider effect on decks and plumbing.
The four ways to reduce it
- Upgrade the pump if it’s single speed. The largest controllable line, and the only one where a purchase reliably reduces a recurring cost.
- Keep chemistry stable rather than dramatic. Balanced water is cheaper than corrected water, and a single green pool recovery costs several months of service. Our green pool recovery cost guide shows the gap.
- Clean the filter on schedule. A loaded filter costs electricity every day it stays loaded, and shortens the pump’s life while doing it.
- Fix small leaks early. Water, chemicals, and heat all escape through the same hole, and a pool topped up daily by an autofill is paying for all three quietly.
Two common attempts don’t reduce the cost. Dropping to biweekly service in summer shifts cost from the service line to the recovery line, and switching the pump off in winter shifts it to the plumbing repair line. Both move the money somewhere less predictable. Weekly versus biweekly and whether to run through winter cover both.
What we charge, and what we don’t
Our weekly pool service is published rather than quoted on a callback: it starts at $140 a month for a small pool, $170 for a medium pool, and $255 and up for a large one, chemicals included, on the weekly pool service page. That covers lines one and two. Lines three, four, and five are yours whoever services the pool.
For your own city’s figures, we publish Plano, Frisco, McKinney, and Allen separately, because build era, tree load, and local rules differ across the county.
