Water Heater Replacement Cost Calculator (2026)
Tank, tankless, or heat pump? Pick your water heater type and tank size for an instant 2026 replacement estimate — unit + professional installation, with 10-year total cost so you can see which option really saves money.
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How we calculate
Installed price = unit cost + typical installation labor (2026 US averages). Tank units: ~$600–$900 install. Tankless/heat pump: ~$1,500–$2,500 install (venting, gas line, or electrical upgrades). The 10-year total adds estimated yearly energy costs: tank gas $300/yr, tank electric $550/yr, tankless gas $200/yr, tankless electric $400/yr, heat pump $150/yr.
Frequently asked questions
How much does it cost to replace a water heater in 2026?
The 2026 US average is $1,300–$5,500 installed. Standard tank heaters: $1,300–$2,500. Tankless: $2,500–$6,500. Heat pump: $2,800–$5,500.
Is a tankless water heater worth the extra cost?
Tankless costs ~2× more upfront but lasts 20+ years (vs 10–15 for tanks) and uses ~30% less energy. It usually pays for itself in 7–10 years for households with high hot-water use.
How long does a water heater last?
Tank heaters: 10–15 years. Tankless: 20+ years. Heat pump: 10–15 years. Hard water shortens lifespan — flush your tank yearly.
What size water heater do I need?
1–2 people: 30–40 gal. 3–4 people: 40–50 gal. 5+ people: 50–75 gal. For tankless: size by flow rate (GPM), not gallons.
Can I install a water heater myself?
Legally you can in many areas, but gas and electrical work is dangerous and code-regulated. Most homeowners hire a pro — permits and inspections are usually required.