Tankless Water Heater Cost Calculator (2026)

Estimate your tankless water heater cost

Fuel typeGas units cost more to install due to venting; electric is cheaper but needs adequate electrical capacity.CoverageA whole-house unit serves the home; point-of-use units serve one fixture and cost less.Install complexityUpsizing the gas line, new venting, or electrical upgrades add to the install.Your ZIP code (for local pricing)We use your ZIP to adjust the estimate to local prices in your area.

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Average tankless water heater cost

Scenario	Typical range (US)
Electric tankless (installed)	$800 – $2,500
Gas tankless (installed)	$2,000 – $4,500
Unit only	$500 – $1,500
Gas line / venting upgrade	$300 – $1,500
Point-of-use unit	$200 – $800

What affects tankless water heater cost

Fuel type. Gas units need venting and possibly a larger gas line; electric needs sufficient amperage.
Sizing. Higher flow rates and whole-house coverage cost more.
Install upgrades. New venting, gas, or electrical work raises the price.
Condensing vs non-condensing. Condensing units cost more but are more efficient.
Labor. Licensed plumbers and electricians charge more but ensure code compliance.
Location. Permit fees and labor rates vary.

Frequently asked questions

How much does a tankless water heater cost?

Installed, gas units run $2,000 to $4,500 and electric units $800 to $2,500.

Is a tankless water heater worth it?

It costs more upfront but lasts about 20 years and lowers energy bills, often paying off over time.

Do I need to upgrade my gas or electrical?

Often yes. Gas units may need a larger line and new venting; electric units need adequate amperage.

How much can a tankless heater save?

Households commonly save 10 to 30 percent on water heating versus a standard tank.

Tankless vs tank: which is better?

Tankless saves space and energy and lasts longer; tanks cost less upfront and are simpler to install.

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Tankless cost depends on fuel and upgrades. A couple of local plumber quotes will confirm yours.

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Estimates are for general information only and are not professional or financial advice. Actual prices vary by home, materials, and contractor. Get a quote from a licensed pro. Last updated 2026-06-16.