Tankless Water Heater Installation Cost Calculator
Estimate tankless water heater install from fuel type and how much venting or electrical work the swap needs — the usual cost drivers beyond the sticker price of the unit. Click any i for detail.
Your tankless install
Fuel type
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Fuel type
Gas tankless units cost more up front but serve whole-home flow better in cold climates. Electric units are cheaper to buy but often need heavy electrical capacity. |
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Install complexity
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Install complexity
A like-for-like swap near existing hookups is cheapest. New vent runs, gas upsizing, or panel upgrades dominate many real bids. |
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Your state
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Your state
Scales midpoints for typical state-level labor and material costs versus the U.S. average — not an on-site bid. |
Options
How to use this calculator
- Choose gas/propane or electric tankless.
- Set how much plumbing/venting/electrical rework you expect.
- Add recirculation or tank haul-away if needed.
- Pick your state and compare unit vs upgrade lines.
Results explained
Complexity often matters more than the unit. The breakdown shows equipment, install labor, and a venting or electrical upgrade allowance when the job is not a simple swap.
Quick reference: tankless install midpoints
U.S.-average midpoints before state scaling.
| Item | Midpoint | Notes |
|---|---|---|
| Gas tankless unit | $1,400 | Whole-home class |
| Electric tankless unit | $750 | May need large amperage |
| Like-for-like labor | $900 | Existing hookups |
| Moderate rework | $1,600 + $650 | Labor + upgrade allowance |
| Major upgrade path | $2,400 + $1,800 | Vent or service heavy |
Recirculation kit ≈ $550. Permits vary by city and are not fully itemized.
How the estimate is built
Total ≈ unit + labor + upgrade allowance (if any) + optional recirculation/haul, × state. Band ≈ 85%–128%.
Example scenario
A gas tankless with moderate rework and haul-away at U.S. average is about $1,400 + $1,600 + $650 + $125 ≈ $3,775.
FAQ
Will electric tankless run on a standard dryer circuit?
Usually not for whole-home flow. Many need 150–200A service capacity — that is why the upgrade line exists.
Hard water?
Scale shortens tankless life. Budget a flush kit or softener separately.
Is the old tank removal included?
Only when haul-away is checked; some plumbers include it in labor, others line-item it.