Tankless Water Heater Cost in 2026: Real Price Ranges and What Drives Them
Installed prices by fuel type and size from Angi, HomeGuide and This Old House, plus the venting, gas line and electrical work that moves the bill, and what changed for tax credits in 2026.
Tankless water heater cost in 2026 averages $2,641 installed, and most homeowners pay $1,406 to $3,902, according to Angi. HomeGuide puts the full range at $1,400 to $5,600. Electric units cost least to install, while gas units cost more because they need dedicated venting and often a larger gas line. The unit itself is under half the bill.
Prices are US national averages in US dollars, checked against Angi (updated August 3, 2026), HomeGuide (updated January 2, 2026) and This Old House (updated June 17, 2026) on October 3, 2026. Canadian homeowners should expect local pricing to differ.
Key takeaways
- Installed tankless water heaters average $2,641, with a typical range of $1,406 to $3,902 (Angi).
- Electric models cost $1,400 to $3,000 installed; natural gas models cost $2,100 to $5,600 (HomeGuide).
- The unit is about 40% to 45% of the total; labor, venting, gas and electrical work make up the rest.
- Tankless units last 15 to 20 years, versus 8 to 12 years for a tank (HomeGuide).
- ENERGY STAR gas tankless models save a family of four about $95 a year versus a gas storage tank.
- The federal 25C tax credit ended for equipment placed in service after December 31, 2025.
How much does a tankless water heater cost installed?
A tankless water heater costs $1,406 to $3,902 installed for most homeowners, with an average of $2,641, according to Angi. HomeGuide reports a wider $1,400 to $5,600 range, and This Old House puts typical installs at $2,100 to $4,000. The spread comes from fuel type, unit size and how much venting, gas or electrical work the home needs.
| Source (date) | Typical installed range | Average |
|---|---|---|
| Angi (updated Aug 3, 2026) | $1,406 to $3,902 | $2,641 |
| HomeGuide (updated Jan 2, 2026) | $1,400 to $5,600 | Not stated |
| This Old House (updated Jun 17, 2026) | $2,100 to $4,000 | About $2,800 |
Sources: Angi; HomeGuide; This Old House.
HomeGuide breaks the bill into the unit at $600 to $2,600, labor at $600 to $2,500 for 3 to 10 hours of work, supplies at $150 to $300 and permits at $50 to $200. Angi puts labor at $600 to $1,850, or about half the project. The unit is the smaller share of the total.
What does a tankless water heater cost by fuel type?
Electric tankless water heaters cost $1,400 to $3,000 installed, propane models $1,600 to $4,500 and natural gas models $2,100 to $5,600, according to HomeGuide. Gas units cost more because the unit is pricier and the install usually needs dedicated venting and enough gas supply. Electric units skip venting but often need heavy-duty electrical work instead.
| Fuel type | Unit only | Installed total |
|---|---|---|
| Electric (whole house) | $600 to $1,000 | $1,400 to $3,000 |
| Propane | $1,000 to $2,000 | $1,600 to $4,500 |
| Natural gas | $1,500 to $2,600 | $2,100 to $5,600 |
| Point-of-use (single fixture) | $150 to $250 | Varies by location |
Source: HomeGuide, updated January 2, 2026.
Within gas units, condensing and non-condensing models differ too. HomeGuide notes that non-condensing units cost about 25% less to install. Angi lists gas units rated 120,000 to 140,000 BTU at $500 to $1,200 and 180,000 to 200,000 BTU units at $900 to $2,200.
What adds to tankless water heater installation cost?
The biggest additions to tankless water heater installation cost are gas line upgrades at $350 to $2,000, new venting at $100 to $600, a dedicated electrical circuit at $250 to $900 and a panel upgrade at $850 to $1,700, according to HomeGuide. Switching fuel types costs the most, adding $1,500 to $2,000 per This Old House.
| Add-on | Typical cost | Source |
|---|---|---|
| Gas line upgrade or extension | $350 to $2,000 | HomeGuide |
| New venting (old tank vents usually cannot be reused) | $100 to $600 | HomeGuide |
| Dedicated electrical circuit | $250 to $900 | HomeGuide |
| Electrical panel upgrade | $850 to $1,700 | HomeGuide |
| Old tank removal and disposal | $75 to $500 | HomeGuide |
| Pressure regulator | $250 to $350 | Angi |
| Permit | $50 to $200 | HomeGuide (Angi: $50 to $100) |
| Switching fuel types | $1,500 to $2,000 | This Old House |
Sources: HomeGuide (January 2026); Angi (August 2026); This Old House.
Labor rates set the rest. HomeGuide lists plumbers at $75 to $150 per hour and electricians at $50 to $130 per hour, and Angi cites a wider $45 to $200 per hour for plumbers. Gas work and the water connections need a licensed plumber, and new circuits need a licensed electrician.
What size tankless water heater do you need?
Tankless water heater size depends on peak flow and temperature rise. HomeGuide suggests about 3.5 gallons per minute (GPM) for 1 to 2 fixtures running at once, 5 GPM for 2 to 3 and 7 or more GPM for 3 to 4. Angi reports that an average home needs 5.5 to 7.5 GPM. Larger units cost more to buy.
Temperature rise is the gap between incoming water and the temperature you want at the tap. HomeGuide's example: 50°F groundwater heated to 115°F needs a 65°F rise. Colder climates need more heating power for the same flow, which pushes buyers toward larger, pricier units.
Angi's sizing data lists electric tankless units at up to about 2 GPM, so households that run several fixtures at once often look at gas units or more than one electric unit. An undersized unit cannot keep up when two showers run at once.
Tankless vs tank water heater: which costs less over time?
A tank water heater costs less upfront, at $600 to $3,100 installed versus $1,400 to $5,600 for tankless, according to HomeGuide. Tankless can cost less over time because it lasts 15 to 20 years instead of 8 to 12 and uses less energy. HomeGuide says the extra cost can pay back in as little as 3 to 7 years through energy savings and rebates.
| Measure | Tankless | Tank |
|---|---|---|
| Installed cost | $1,400 to $5,600 | $600 to $3,100 |
| Annual energy cost, gas | $220 to $480 | $250 to $420 |
| Annual energy cost, electric | $340 to $540 | $530 to $600 |
| Expected lifespan | 15 to 20 years | 8 to 12 years |
Source: HomeGuide, updated January 2, 2026.
ENERGY STAR estimates that a certified gas tankless model saves a family of four about $95 a year, or about $1,800 over its life, compared with a standard gas storage tank. Against a conventional, non-certified tankless unit, the certified model saves about $20 a year. ENERGY STAR puts life expectancy at 20 years.
For the bigger picture on replacement timing and types, see our water heater statistics report.
Are there tax credits or rebates for tankless water heaters in 2026?
There is no federal tax credit for tankless water heaters installed in 2026. The IRS says the Energy Efficient Home Improvement Credit, section 25C, applies only to qualifying property placed in service by December 31, 2025. That credit had covered up to $600 for qualifying gas water heaters. Local utility and state rebates may still apply.
Search the ENERGY STAR Rebate Finder by ZIP code to see current offers from your utility. Eligibility rules vary by program, so check the terms before you buy the unit.
If upfront cost is the hurdle, our home improvement financing options can spread the payment over time.
How much does tankless water heater maintenance cost?
Tankless water heater maintenance costs about $110 to $200 for a professional flush, according to Angi, with general maintenance visits at $50 to $350. Repairs average about $600 and can reach $1,300. Flushing removes mineral scale from the heat exchanger. Hard water tends to build scale faster, so those homes may need more frequent service.
Skipping maintenance shortens the unit's life, and that undercuts the main financial case for going tankless. Ask your installer how often they recommend flushing for your water hardness and whether a water softener or scale filter makes sense.
How do you get an accurate tankless water heater quote?
An accurate tankless water heater quote names the unit model and GPM rating, the fuel type, and every add-on: venting, gas line sizing, electrical circuit or panel work, removal of the old tank and the permit. Get at least two written quotes for the same scope, because the add-ons can swing the total by thousands of dollars.
- Count peak fixtures you run at once and share your incoming water temperature if you know it.
- Ask for a gas load or electrical load check before the quote is final.
- Confirm venting is new and matched to the unit, not reused from the old tank.
- Check who pulls the permit and whether disposal of the old tank is included.
- Ask about rebate paperwork if your utility offers one.
Pro House Maintenance matches you with vetted, licensed and insured pros who give free, fixed-price estimates. Start with our water heater installation service to compare local quotes.
Sources
How we verified this page. Every price on this page comes from a published cost source: Angi's tankless water heater cost guide (updated August 3, 2026), HomeGuide's tankless installation cost guide (updated January 2, 2026) and This Old House's water heater installation cost guide (updated June 17, 2026). Energy savings come from ENERGY STAR, and tax credit status comes from the IRS. We left out efficiency percentages we could not confirm on a live government page. All sources were checked on October 3, 2026.
- Angi, tankless water heater cost guide, updated August 3, 2026, angi.com/articles/how-much-does-tankless-water-heater-cost.htm, accessed October 3, 2026.
- HomeGuide, tankless water heater installation cost guide, by Tamatha Hazen, updated January 2, 2026, homeguide.com/costs/tankless-water-heater-installation-cost, accessed October 3, 2026.
- This Old House, water heater installation cost guide, updated June 17, 2026, thisoldhouse.com/plumbing/water-heater-installation-cost, accessed October 3, 2026.
- ENERGY STAR, "Whole-Home Tankless Gas Water Heaters: Benefits and Savings," energystar.gov, accessed October 3, 2026.
- Internal Revenue Service, "Energy Efficient Home Improvement Credit," irs.gov, accessed October 3, 2026.
- ENERGY STAR, Rebate Finder, energystar.gov/rebate-finder, accessed October 3, 2026.
Frequently Asked Questions
How much does a tankless water heater cost installed?
Most homeowners pay $1,406 to $3,902 for an installed tankless water heater, with an average of $2,641, according to Angi's August 2026 data. HomeGuide's wider range runs $1,400 to $5,600. Electric whole-house units sit at the low end, while natural gas units that need new venting or a larger gas line sit at the high end.
Is a tankless water heater worth the cost?
It depends on how long you stay. Tankless units cost more upfront but last 15 to 20 years versus 8 to 12 for a tank, and HomeGuide says the extra cost can pay back in 3 to 7 years. ENERGY STAR estimates certified gas tankless models save a family of four about $95 a year over a gas storage tank.
How much does it cost to switch from a tank to tankless?
Switching usually costs more than a like-for-like tankless swap because the old tank must come out and the home may need new venting, a bigger gas line or a dedicated electrical circuit. HomeGuide puts gas line work at $350 to $2,000 and a new electrical panel at $850 to $1,700. Old tank vents generally cannot be reused.
What size tankless water heater do I need?
Size depends on how many fixtures run at once and how cold your incoming water is. HomeGuide suggests about 3.5 gallons per minute for 1 to 2 fixtures, 5 GPM for 2 to 3, and 7 or more GPM for 3 to 4. Angi reports that an average home needs roughly 5.5 to 7.5 GPM.
Do electric tankless water heaters cost less than gas?
Electric tankless units cost less to buy and install, at $1,400 to $3,000 installed versus $2,100 to $5,600 for natural gas, according to HomeGuide. They skip venting and gas line work. However, whole-house electric models often need a dedicated circuit or a panel upgrade, and HomeGuide estimates their yearly energy cost runs higher than gas tankless.
Is there a federal tax credit for tankless water heaters in 2026?
No. The IRS says the federal Energy Efficient Home Improvement Credit (section 25C) only applies to qualifying property placed in service by December 31, 2025, so tankless units installed in 2026 do not qualify. Some utilities and states still offer rebates, which you can search with the ENERGY STAR Rebate Finder by ZIP code.
How much does tankless water heater maintenance cost?
Angi reports that a professional flush to remove mineral scale costs about $110 to $200, and general maintenance visits run $50 to $350. Repairs average about $600 and can reach $1,300. Hard water speeds up scale buildup, so homes with hard water usually need more frequent flushing to keep the unit efficient.