Water heating
Water Heater Installation Cost Calculator
Estimate the installed cost of replacing a water heater — by fuel (gas / electric / propane), tank size (40 / 50 / 80 gallon), and efficiency tier. Calibrated to your state's labor rates and energy prices. For heat-pump or tankless water heaters, see the dedicated calculators linked below.
Quick answer: standard tank $1,200–$2,800 installed; 75/80-gallon high-capacity $1,500–$3,500; heat pump water heater $2,200–$4,200; tankless $3,000–$8,500. Permit adds $75–$300.
Optional — auto-sets state
Installed cost · Atmospheric-vent 0.62 UEF 50-gal · Ohio
$1,934
range $1,265 – $2,974
Annual operating cost
$231/yr
UEF 0.62
HPWH alternative
$3,000
Saves $0/yr op
Cost breakdown
- Equipment (50 gal)$1,000
- Install + venting$784
- Permit & inspection$150
- Total (mid)$1,934
Three-way comparison
- Standard tank (this calc)$1,934
- HPWH (50-gal hybrid)$3,000
- Tankless gas$4,300
HPWH typically saves $300-500/yr in operating cost vs gas tank; HEEHRA rebate up to $1,750 for income-qualified buyers.
Quote check — what to ask
- · UEF (Uniform Energy Factor) in writing — replaces older EF rating.
- · Expansion tank included (required by most codes since 2012).
- · T&P (temperature/pressure) valve and drip pan included.
- · Sediment trap on gas line, dielectric unions on water lines.
- · Old unit haul-away included.
- · Combustion-air check (CO test) at startup for atmospheric-vent gas.
- · 6+ year tank warranty (premium tier offers 12 years).
See the single most-likely cost and the realistic range it falls in — not just a low/high band.
- ~40%Code upgrades (expansion tank, strap, T&P, drip leg)+$300–$800
- ~25%Venting brought to code (gas units)+$100–$600
Surprise odds are approximate planning estimates, not measured rates; cost ranges are sourced where shown. How this works.
Method: each cost line is drawn from a triangular distribution and correlated by a shared market factor (~0.5), then sampled across 10,000 outcomes (a Monte Carlo simulation); the most-likely value and range emerge from the simulation, not the band. A planning simulation, not a quote.
Which water heater type is right for you?
This calculator covers standard tank water heaters. Three other types are worth comparing before you replace:
- Heat pump water heater (HPWH): 1/3 the energy use of a standard electric tank. Higher upfront ($2,200–$4,200) but cheapest to run. HPWH calculator
- Tankless (on-demand): endless hot water, 20+ year lifespan, but $3,000–$8,500 installed and needs gas-line / venting upgrades. Tankless calculator
- Standard tank (this page): cheapest to install, 10–12 year lifespan, simplest swap. The default for most direct replacements.
Frequently asked questions
How much does water heater installation cost in 2026?
A standard tank water heater runs $1,200 to $2,800 installed nationally. A 75- or 80-gallon high-capacity tank runs $1,500 to $3,500. A heat pump water heater runs $2,200 to $4,200. A tankless (on-demand) unit runs $3,000 to $8,500. The biggest cost drivers are tank size, fuel type (gas vs electric vs propane), venting requirements, and whether a new circuit or gas line is needed. Use the calculator above to refine for your fuel, size, and tier.
How much does a 75 or 80 gallon water heater cost installed?
A high-capacity 75- or 80-gallon tank water heater runs $1,500 to $3,500 installed for gas or electric. The larger tank itself costs $1,100 to $2,000 (gas) or $900 to $1,800 (electric); installation labor adds $500 to $1,600 depending on whether the existing connections, venting, and space accommodate the larger unit. Many homes that "need" an 80-gallon tank are better served by a 50-gallon heat pump water heater, which delivers equivalent first-hour rating at lower operating cost.
What type of water heater is cheapest to install vs. cheapest to run?
Cheapest to install: a standard atmospheric-vent gas or electric tank ($1,200 to $2,500). Cheapest to run: a heat pump water heater, which uses about 1/3 the energy of a standard electric tank. The HPWH costs more upfront ($2,200 to $4,200 installed) but the operating-cost savings typically pay back the premium in 3 to 5 years for a 4-person household. Tankless units cost the most to install but last 20+ years vs. 10 to 12 for a tank.
Do I need a permit to replace a water heater?
Yes, in nearly every U.S. jurisdiction. A water heater replacement is permitted plumbing (and electrical, for electric units) work. The permit triggers an inspection that confirms correct venting, temperature-and-pressure relief valve, seismic strapping (in earthquake zones), expansion tank, and gas-line or electrical-circuit sizing. Permit fees typically run $75 to $300. An unpermitted install can void your homeowner insurance and complicate a home sale.
What rebates apply to water heater installation?
For standard gas or electric tanks: generally none, since they are not high-efficiency. For heat pump water heaters: the federal 25C credit (which covered HPWHs up to $2,000) expired Dec 31 2025 under OBBBA, but DOE HEEHRA provides up to $1,750 for HPWHs in income-qualified households where the state has launched the program, plus state and utility rebates. See /rebates/ for the full list and /heat-pump-water-heater-cost-calculator/ for HPWH-specific estimates.