A tankless water heater heats water on demand instead of keeping a tank hot 24/7 — endless hot water and a longer lifespan, for a higher upfront price. Installation costs $1,500 to $4,500 in 2026, averaging around $3,000, depending on fuel type and what your home needs to support it.
What you’re paying for
The unit itself is only part of the bill. The rest is labor plus the upgrades a tankless heater often demands: a bigger gas line, new venting, or added electrical capacity. Those upgrades are why switching from a tank can cost more than a simple swap.
Gas vs. electric
Electric units are cheaper to install and fine for smaller homes or single fixtures, but high demand may need a panel upgrade. Gas units cost more and require proper venting, but deliver the flow a whole house needs.
The value is in the long run
Tankless costs more than a tank upfront but lasts 20+ years and only heats water when you use it. The payback shows up in energy bills and not replacing the unit as often.
How to save on a tankless water heater
- Match the size to your demand — oversizing wastes money.
- Check your gas line and venting before buying; upgrades drive the cost.
- Consider a condensing unit if you want the lowest operating cost.
- Descale it yearly to hit the 20-year lifespan.
| Item | Typical range | Notes |
|---|---|---|
| Tankless unit | $500 – $2,000 | – |
| Installation labor | $500 – $1,500 | – |
| Gas line / venting upgrade | $300 – $1,500 | Common when replacing a tank |
| Electrical upgrade (electric units) | $300 – $1,500 | – |
| Permits | $50 – $300 | When a plumbing project needs a permit on Permit Notebook, our sister site |
| Option | Typical range | Notes |
|---|---|---|
| Point-of-use (electric) | $200 – $800 | One fixture; small |
| Whole-house electric | $1,200 – $3,500 | – |
| Whole-house gas | $2,000 – $4,500 | Higher flow; needs venting |
| Condensing gas | $2,500 – $5,500 | Most efficient |
What affects the price
- Gas vs. electric Electric units are cheaper to install but may need a panel upgrade; gas units cost more and need proper venting but deliver more hot water.
- Switching from a tank Retrofitting often means a larger gas line, new stainless venting, or added circuits — the biggest cost surprise.
- Size & flow rate A whole-house unit sized for simultaneous showers costs more than a single-bathroom or point-of-use heater.
- Condensing vs. non-condensing Condensing units cost more upfront but recover more heat and cut operating costs.
Tankless water heater cost by state
Where you live can change the price as much as the options you pick. Labor is a big part of the bill, and construction workers are paid more in some states than others. A typical tankless water heater job costs about $1,800 to $5,300 in Hawaii (17% above the U.S. average). In Arkansas, it costs about $1,300 to $3,800 (15% below the U.S. average).
See the typical cost in all 50 states and D.C.
| State | Typical range |
|---|---|
| Alabama | $1,300 – $3,900 |
| Alaska | $1,700 – $5,200 |
| Arizona | $1,400 – $4,300 |
| Arkansas | $1,300 – $3,800 |
| California | $1,700 – $5,000 |
| Colorado | $1,500 – $4,500 |
| Connecticut | $1,600 – $4,800 |
| Delaware | $1,500 – $4,400 |
| District of Columbia | $1,600 – $4,900 |
| Florida | $1,400 – $4,100 |
| Georgia | $1,400 – $4,100 |
| Hawaii | $1,800 – $5,300 |
| Idaho | $1,400 – $4,200 |
| Illinois | $1,700 – $5,200 |
| Indiana | $1,500 – $4,500 |
| Iowa | $1,500 – $4,400 |
| Kansas | $1,400 – $4,300 |
| Kentucky | $1,400 – $4,200 |
| Louisiana | $1,400 – $4,100 |
| Maine | $1,500 – $4,400 |
| Maryland | $1,500 – $4,500 |
| Massachusetts | $1,700 – $5,200 |
| Michigan | $1,500 – $4,500 |
| Minnesota | $1,600 – $4,900 |
| Mississippi | $1,300 – $3,900 |
| Missouri | $1,500 – $4,600 |
| Montana | $1,500 – $4,400 |
| Nebraska | $1,400 – $4,200 |
| Nevada | $1,500 – $4,600 |
| New Hampshire | $1,500 – $4,500 |
| New Jersey | $1,700 – $5,100 |
| New Mexico | $1,400 – $4,100 |
| New York | $1,700 – $5,000 |
| North Carolina | $1,400 – $4,100 |
| North Dakota | $1,500 – $4,500 |
| Ohio | $1,500 – $4,500 |
| Oklahoma | $1,400 – $4,100 |
| Oregon | $1,700 – $5,000 |
| Pennsylvania | $1,500 – $4,500 |
| Rhode Island | $1,600 – $4,700 |
| South Carolina | $1,400 – $4,100 |
| South Dakota | $1,400 – $4,100 |
| Tennessee | $1,400 – $4,100 |
| Texas | $1,400 – $4,100 |
| Utah | $1,400 – $4,200 |
| Vermont | $1,500 – $4,400 |
| Virginia | $1,400 – $4,300 |
| Washington | $1,700 – $5,200 |
| West Virginia | $1,400 – $4,300 |
| Wisconsin | $1,600 – $4,700 |
| Wyoming | $1,500 – $4,500 |
These are numbers to plan with, not quotes. Each one is this guide's U.S. range, adjusted for what construction workers earn in that state. See every state cost guide or how we estimate.
Common questions
- How much does it cost to install a tankless water heater?
- Most installs run $1,500–$4,500, averaging about $3,000. The unit is $500–$2,000; the rest is labor plus any gas-line, venting, or electrical upgrades needed to support it.
- Is a tankless water heater cheaper than a tank?
- No — upfront it costs more than a standard tank ($800–$2,500 installed). It saves over time through lower energy use and a 20+ year lifespan, so the payback is in operating cost, not install price.
- Gas or electric tankless — which is better?
- Gas handles whole-house demand better and runs through outages, but costs more to install and vent. Electric is cheaper and simpler for smaller homes or point-of-use, though it may require an electrical upgrade.
- How long does a tankless water heater last?
- About 20 years or more with annual descaling — roughly double a tank's 10–15 year life. That longevity is a big part of the value case.
- Is a tankless water heater worth it?
- If you want endless hot water, a longer lifespan, and lower energy bills — and you'll stay in the home long enough to recoup the higher install cost — yes. For a short stay or tight budget, a standard tank is cheaper upfront.
How we estimate: These are typical U.S. prices for materials and for hiring a pro to install them. We checked them against the 2026 sources listed below (see how we get our numbers). Your price depends on where you live, the size of the job and the materials you pick. Get two or three written bids before you choose a contractor.
Sources
We checked the prices on this page against 2026 numbers from these sources:
- Tankless Water Heater Cost (2026), HomeGuide
- How Much Does a Tankless Water Heater Cost?, Angi
- Tankless Water Heater Cost, Bob Vila