Independent tool: our cost estimates come from documented prices and manufacturer specs. We may earn a commission if you buy through our links — it never changes the numbers.
Looking for our full breakdown of equipment prices, plumber installation rates, and hidden upkeep fees? Read our complete Whole House Water Filter Cost Guide (2026).
The price tag on the box is the least informative number in water treatment. A $900 system that eats $300/year in cartridges costs more over a decade than a $1,800 system that costs $40/year to run. This calculator uses our documented 47-system cost database — equipment, install, and upkeep ranges observed Sep–Oct 2026 — so you can compare what systems actually cost to own.
True Cost of Ownership Calculator
The sticker price is the least informative number on a water system. Pick up to three systems and see what each actually costs to own over the years you’ll keep it — equipment, install, and replacement media, all in.
DIY assumes $0 install cost — realistic only if you’re comfortable sweating copper or working with PEX and your local code allows it. Pro install uses our documented typical range.
Select at least two systems above to compare.
Methodology: N-year total = equipment + install + (annual upkeep × N). All inputs are price ranges observed Sep–Oct 2026, so totals are ranges too — honest about uncertainty instead of pretending at precision. Annual upkeep comes from replacement media costs and change intervals in manufacturer documentation; where intervals are gallon-rated we assume 300 gal/day household use. Full method and the 49-system table: our methodology page.