Water Heater Replacement Cost
Updated 24 March 2026
Tank or tankless, gas or electric: what you will actually pay installed in 2026.
Quick Answer
Tank water heater: $800 to $2,000 installed. Tankless: $2,500 to $5,000 installed. The type you choose matters more than the brand.
Tank vs Tankless
Both heat water. They do it differently, and the tradeoffs are real.
Tank (Storage)
$800 to $2,000 installed
- +Lower upfront cost
- +Simpler installation, most plumbers can do it
- +Works during power outages (gas models)
- -8 to 12 year lifespan
- -Takes up floor space (40 to 80 gallons)
- -Can run out of hot water in large households
- -Standby heat loss wastes energy 24/7
Tankless (On-Demand)
$2,500 to $5,000 installed
- +15 to 20 year lifespan
- +Wall-mounted, frees up floor space
- +Unlimited hot water, never runs out
- +20 to 30% more energy efficient
- -Higher upfront cost ($1,500 to $3,000 more)
- -Lower flow rate (may struggle with simultaneous use)
- -Gas models need upgraded venting or new flue
Cost by Fuel Type
Installed costs including unit, labor, and standard connections. Prices based on national averages for 2026.
| Type | Unit Cost | Labor | Total Installed |
|---|---|---|---|
| Electric tank | $400-900 | $200-500 | $700-1,500 |
| Gas tank | $500-1,200 | $300-700 | $900-2,500 |
| Electric tankless | $500-1,500 | $500-1,500 | $1,500-3,500 |
| Gas tankless | $1,000-2,500 | $1,000-2,500 | $2,500-5,000 |
| Heat pump / hybridMost efficient | $1,200-2,500 | $500-1,200 | $2,000-4,000 |
Add $300 to $800 if switching fuel types (e.g., electric to gas) due to new line or venting work.
What Size Do You Need?
Undersizing means running out of hot water. Oversizing wastes energy heating water you never use.
A 30-gallon tank is enough for a single person. Two people should go to 40 gallons, especially if you have a shower and a dishwasher running close together.
The most common size for a family home. A 50-gallon tank handles back-to-back showers without running cold. Most gas heaters recover faster than electric.
Large families should look at 75 to 80 gallons, or switch to tankless entirely. With tankless you do not size by gallons but by flow rate (gallons per minute).
Signs Your Water Heater Is Dying
Most failures do not happen without warning. These are the signs to act on before you get a flooded utility room.
Rusty or brown water
Rust inside the tank means the anode rod has failed and the tank is corroding. This is usually a replacement job, not a repair.
Rumbling or popping noises
Sediment builds up on the bottom of the tank over time. The heater strains to push heat through it. Flushing may buy time, but it is often a sign the end is near.
Leaking from the base
A puddle under the tank almost always means the tank has cracked. There is no repair for a cracked tank. Replace it before it fails completely.
Age over 10 years
The average tank lasts 8 to 12 years. If yours is past 10 years, budget for replacement even if it seems to be working fine. Failure usually comes without much warning.
Inconsistent temperature
Water that swings between too hot and too cold points to a failing thermostat or heating element. Repairs are cheap, but on an older unit it is often not worth it.
Unexplained rise in energy bills
A water heater working harder than it should draws more power or gas. If your bills have crept up and nothing else changed, the water heater may be losing efficiency.
Energy Savings
Upgrading an aging electric tank to a heat pump hybrid is one of the best energy investments in a home.
Frequently Asked Questions
How much does water heater replacement cost?
A tank water heater costs $800 to $2,000 installed. A tankless unit costs $2,500 to $5,000 installed. Fuel type and size are the two biggest cost drivers.
How long does a water heater last?
Tank water heaters last 8 to 12 years. Tankless units last 15 to 20 years. Annual flushing and anode rod replacement can extend tank heater life by several years.
Is it worth replacing a tank heater with a tankless?
It depends on your household. Tankless units cost $1,500 to $3,000 more upfront but save $100 to $200 per year on energy. The payback period is 10 to 15 years, so they make most sense if you are staying in the home long-term.
What is a heat pump water heater?
A heat pump water heater (also called a hybrid) pulls heat from surrounding air instead of generating it directly. It uses 2 to 3 times less electricity than a standard electric tank. Federal tax credits of up to $2,000 are available for qualifying installations.