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The Bottom Line
Budget $600-$1,200 for the unit plus $150-$500 for installation if you’re not doing it yourself, and expect $10-$40/month in ongoing salt costs.
So how much is a water softener, really? Typically between $400 and $2,500 for the unit itself, with most homeowners landing somewhere in the $600-$1,200 range for a mid-size, reliable system. Installation, if you hire a plumber rather than doing it yourself, usually adds $150-$500 on top. Here’s how the full cost breaks down.
Cost by Softener Type
| Type | Typical Unit Cost | Best For |
|---|---|---|
| Single-tank salt-based | $400 – $900 | Small-to-medium households, standard city water |
| Dual-tank salt-based | $1,000 – $2,000 | Larger households needing continuous soft water |
| High-efficiency/smart metered | $900 – $2,500 | Households wanting lower salt and water use |
| Salt-free conditioner | $500 – $1,500 | Sodium-restricted or septic-system homes (see note below) |
For a full walkthrough of which type fits your specific situation, see our best water softener buying guide.
Installation Costs
- DIY installation: $0 in labor if you’re comfortable with basic plumbing, though you’ll need bypass valves and fittings (typically $30-$80 in extra parts if not included).
- Professional installation: $150-$500 depending on your region and whether existing plumbing needs modification.
Ongoing Costs
Beyond the upfront cost, budget for:
- Salt: roughly $5-$10 per 40lb bag, with most households using 2-4 bags per month ($10-$40/month).
- Electricity: minimal for most units, typically under $5/month.
- Resin replacement: every 10-15 years, $150-$300.
Wondering how long your investment will actually last? We cover that in detail in how long do water softeners last.
Is It Worth the Cost?
For most hard-water households, yes — softeners typically pay for themselves within a few years through less soap/detergent use, longer-lasting appliances, and reduced scale buildup in pipes and water heaters. If you’re on well water specifically, also check our best water softener for well water guide, since iron and sediment can change which system makes sense.