Water Heater Replacement Cost
National planning ranges, installed: tank $1,200–$3,500, tankless $3,000–$6,500+. Same-day emergency swaps add $200–$500. Here's what moves your number.
Cost by type, installed
| Type | Installed range | Best for |
|---|---|---|
| 40–50 gal gas tank | $1,200–$2,500 | Like-for-like swaps; cheapest installed |
| 40–50 gal electric tank | $1,300–$2,800 | Homes without gas; simple install |
| High-efficiency / power-vent tank | $2,000–$3,500 | Lower running costs, tight venting situations |
| Gas tankless (whole-home) | $3,000–$6,500+ | Endless hot water; big families |
| Heat-pump (hybrid) tank | $2,500–$4,500 | Lowest energy bills where space allows |
What drives the price
- Fuel switches cost most. Electric-to-gas (or back) means new lines, breakers, or venting — often $500–$2,000 beyond the unit.
- Tankless needs infrastructure. Larger gas lines, new venting, sometimes electrical upgrades. Get these itemized, not bundled.
- Code upgrades are mandatory. Expansion tanks, drip pans, seismic straps, and permits ($50–$300) appear on legitimate quotes — their absence is a red flag.
- Access matters. Attics, tight closets, and haul-away of the old tank add labor.
- Timing is a lever. Planned replacements beat emergency weekend calls by hundreds.
Tank vs tankless: the honest math
Tankless saves roughly $80–$150/year on energy for a typical family but costs $1,500–$3,500 more installed — an 8–12 year payback. It wins on endless hot water and 20-year lifespan (vs 8–12 for tanks); it loses on upfront cost and maintenance (annual descaling in hard-water areas). Staying under 7 years? Buy the efficient tank.
Quote rule: get three written quotes specifying unit model, capacity, warranty (unit + labor separately), permit handling, and haul-away. Learn to compare them in how to read a contractor quote.
Quick answers
How much does water heater replacement cost in 2026?
$1,200–$3,500 installed for a standard tank; $3,000–$6,500+ for whole-home tankless.
Is tankless worth the extra cost?
For high-demand homes staying 10+ years, often yes. For small households or short stays, an efficient tank usually wins.