Heat Pump Water Heater Savings Calculator 2026
Estimate 2026 heat pump water heater savings vs an electric tank: annual dollars saved, payback and 10-year return, with optional state and utility rebates.
Estimate scope & data quality
This tool provides an input-driven estimate. Use the required inputs shown above and review the result limitations below.
- Data quality
- NOT_AVAILABLE
- Result limitation
- Calculator output is not a source-complete customer result.
A tariff credit is distinct from annual savings. If a result is NOT_COMPUTABLE or CONFLICT, it must not be replaced with an estimate or treated as canonical.
How to use this calculator
- Set your household's daily hot water use in gallons (roughly 12–20 gallons per person per day).
- Enter your electricity rate in $/kWh from your utility bill (the US residential average is $0.182/kWh, EIA, July 2026 year-to-date).
- Enter the extra cost of a heat pump water heater compared with a standard electric tank, from your installer quote.
- Add any state HEAR rebate or utility rebate you have confirmed; leave it at $0 if you have none (there is no federal tax credit for 2026 installs).
- Annual savings, payback period and 10-year net savings update instantly.
Understanding your results
Heat pump water heaters (HPWH) move heat from the surrounding air into the water instead of generating heat directly. That makes them 2–3.5× more efficient than standard electric resistance heaters: for every unit of electricity used, they deliver 2–3.5 units of heat.
Coefficient of Performance (COP) measures efficiency. A standard electric resistance heater has a COP of 1.0; a heat pump water heater runs at about 2.0–3.5 depending on ambient temperature. This calculator assumes the heat pump uses 40% of the electricity of a resistance tank (a 60% cut, roughly COP 2.5) and about 0.135 kWh of heat per gallon of hot water. Example: 50 gallons/day at $0.182/kWh (EIA, July 2026 year-to-date) ≈ 2,464 kWh/yr with a resistance tank, 1,478 kWh saved, ≈ $269/yr.
2026 incentives: Until Dec 31, 2025, the §25C Energy Efficient Home Improvement Credit covered 30% of a qualifying heat pump water heater (up to $2,000). The One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025) ended it for property placed in service after Dec 31, 2025 (IRS FAQ). In 2026 the remaining help is state-run HEAR rebates (up to $1,750 for a HPWH for income-qualified households, only where your state program is live) and utility rebates. Check your state energy office or DSIRE and enter confirmed amounts in the rebates field. This is not tax advice; confirm with a tax professional.
Cost premium: A HPWH typically costs $800–$1,500 more than a standard electric tank, before any rebate. The calculator defaults to a $1,500 premium; replace it with your quote.
Space requirements: HPWHs need roughly 700–1,000 cubic feet of surrounding air to run efficiently and make some noise (similar to a dehumidifier). They also slightly cool and dehumidify the space around them, which helps in summer but adds a small heating load in winter.
Frequently asked questions
Direct answers for US homeowners.
Related guides
In-depth articles on sizing, costs, and energy decisions.