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Tankless water heater cost depends on fuel, size and how much your home needs to change. Here are realistic 2026 price ranges for the unit, the installation and running it.
Searching for the cost of tankless water heater models, the tankless water heater price range, or simply how much is a tankless hot water heater? The table below covers tankless water heater prices by type, and the cost of on demand water heater installation in most homes.
A tankless water heater cost has three parts: the unit, the installation, and the energy to run it. The unit is often the smaller share of the total.
| Type | Unit price (typical) | Installed total (typical) |
|---|---|---|
| Point-of-use electric (one sink) | $150–$600 | $400–$1,200 |
| Whole-house electric (24–36 kW) | $500–$1,200 | $1,500–$4,000+ (more if the panel needs upgrading) |
| Whole-house natural gas, non-condensing | $800–$1,500 | $1,800–$4,000 |
| Whole-house natural gas, condensing | $1,100–$2,500 | $2,500–$5,000 |
| Propane (LP), whole house | $900–$2,500 | $2,000–$5,000 |
| Portable / RV propane | $150–$900 | DIY to $800 |
These are national estimates for the U.S. in 2026. Prices vary by region, brand and installer. Cost surveys from NerdWallet put installed tankless systems at roughly $1,400–$3,900, while HomeGrail reports an average near $3,500, and big-box installation averages can be higher.
Electric tankless water heater cost is the lowest for the unit itself because there is no burner or venting. A whole-house model runs about $500–$1,200. The catch is power: a 27–36 kW unit can need 100–150 amps, and if your panel can’t handle it, an electrical upgrade can add $1,000–$3,000 or more. Compare models in electric tankless water heaters.
Gas tankless water heater cost is higher for the unit, roughly $800–$2,500, with condensing models at the top of the range. Installation may include a larger gas line and new vent pipe, so total costs of $2,500–$4,500 are common when converting from a tank. Browse natural gas tankless water heaters.
Propane units cost about the same as natural gas models. If you don’t already have a propane tank, tank rental or purchase and a regulator add to the bill. See propane tankless water heaters.
In short, tankless hot water heater cost rises with capacity and features. How much do tankless water heaters cost for a typical family? Most land in the $1,000–$2,000 unit range for gas.
A like-for-like tankless replacement can be a few hours of labor. Switching from a tank often means new venting, a larger gas line, a condensate drain, isolation valves and a new electrical outlet. Our tankless water heater installation cost guide breaks each item down.
Because a tankless unit heats water only when you use it, it avoids the standby heat loss of a tank. The U.S. Department of Energy estimates efficiency gains of 24–34% for homes using 41 gallons or less of hot water a day, and 8–14% for homes using around 86 gallons a day. In dollars, many households save around $70–$150 a year, depending on local energy prices and how much hot water they use.
| Tank (gas, 50 gal) | Tankless (gas) | |
|---|---|---|
| Installed price | $1,200–$2,500 | $2,500–$4,500 |
| Typical lifespan | 8–12 years | 20+ years |
| Annual energy | Higher (standby loss) | Lower |
| Annual maintenance | Drain sediment | Descale (flush) |
Over 20 years, many homeowners would buy two tanks for every tankless unit, which narrows the gap. Read the full comparison in tankless vs tank water heaters.
Every listing shows the price, condition, GPM and requirements so you can budget accurately.
A whole-house tankless water heater typically costs $500–$1,200 for electric and $800–$2,500 for natural gas or propane before installation. Installed, budget about $1,400–$4,500 depending on your home.
They contain a high-output burner or heating elements, a large copper or stainless heat exchanger, flow sensors and electronic controls. Installation also often needs a larger gas line, new venting or a bigger electrical circuit.
Small 120V point-of-use units start around $150–$300. Whole-house 24–36 kW electric units are typically $500–$1,200, plus installation and any electrical upgrades.
Usually yes. The U.S. Department of Energy estimates demand water heaters can be 24–34% more energy efficient than tank heaters for homes using 41 gallons or less of hot water a day, and 8–14% more efficient for homes using around 86 gallons a day.
It varies widely. With savings of $70–$150 a year on energy, the extra upfront cost can take 8–20 years to recover. A longer lifespan, more space and endless hot water are often the bigger reasons people switch.
This guide is general information for U.S. homeowners, not professional advice. Gas, electrical and venting work must follow the manufacturer’s instructions and local codes, and in most areas requires a licensed plumber, electrician or gas fitter and a permit. Specifications and prices change; always confirm details on the product page and in the installation manual.
