Water treatment · Repair, replace or choose · Updated November 2026
Water Softener vs. Whole-House Filter: Which Do You Need?
A water softener and a whole-house filter solve different problems. A softener removes hardness minerals that cause scale. A filter removes things like sediment, chlorine taste or specific contaminants. Some homes need both.
Which problem do you have?
| What you notice | Usually points to |
|---|---|
| White scale on faucets, spotty dishes, soap that will not lather | Hard water: softener |
| Chlorine taste or smell | Carbon filter |
| Sand or grit in aerators | Sediment filter |
| Rotten egg smell | Sulfur or bacteria; test first |
| Orange or brown stains | Iron or manganese; specialized treatment |
| Concern about lead, PFAS or other contaminants | Test first, then choose a system certified for that contaminant |
Costs
| System | Typical cost |
|---|---|
| Water softener installation | About $1,500 average |
| Whole-house filtration system | $1,129–$3,540 (about $2,273 average) |
| Reverse osmosis system | $1,000–$4,800 |
| Filter system maintenance | $50–$300 per year |
From HomeAdvisor's water softener and water filtration cost guides.
Things to know
- Salt-free "conditioners" reduce scale buildup but do not remove hardness minerals the way ion exchange softeners do.
- Look for NSF/ANSI certification for the specific contaminant you want to reduce.
- A point-of-use filter (under the kitchen sink) may be enough if the concern is only drinking water.
Start with a test: understanding a home water test.
Sources
- HomeAdvisor: Water softener installation cost, accessed November 2026
- HomeAdvisor: Home water filtration system cost, accessed November 2026
Cost figures are national ranges from the sources listed above, not a quote from FixFinch or any contractor.