How Much Does It Cost to Replace a Water Heater?

Replacing a water heater costs about $900 to $2,200 installed for a tank swap in 2026 — same fuel, same spot. Bob Vila puts the national average at $1,293. A heat pump model runs $2,000 to $3,800, and switching to tankless is a $3,000+ job because it is a conversion, not a swap — what a tankless costs breaks that one down.

This is for a homeowner replacing a heater that is failing or near the end of its life. If yours is already leaking from the tank, that is not a repair decision — skip to the bottom.

How much does it cost to replace a water heater?

$900 to $2,200 for a standard tank — see the cards above for the breakdown by type. Going tankless costs more: $1,400 to $3,900, or $3,000 to $5,500 for a gas conversion that needs a new line and venting (what a tankless costs breaks that down on its own).

NerdWallet puts a tank at $600 to $2,500 installed. The single biggest swing inside that range is whether anything has to change. Same fuel, same location and reusable venting put you at the low end; a new gas line, vent or fuel type at the high end.

What does the water heater unit cost?

$400 to $1,000 for a standard 40- or 50-gallon tank, before installation. A basic 40-gallon electric tank is around $400–$600; a 50-gallon gas unit is $600–$1,000; high-efficiency and power-vent models run higher.

• 40 vs 50 gallon: a 50-gallon tank costs $100–$200 more and suits a household of three to four. Two people can use a 40.
• Gas vs electric unit: the units cost about the same; gas costs more to install because of the flue.
• Brand: Rheem, A.O. Smith, and Bradford White are the mainstream tanks, priced within a narrow band of each other. Warranty length (6, 9, or 12 years) is the clearest thing separating tiers — a longer warranty usually means a thicker anode rod and a better tank lining.

If you are replacing because of age rather than a failure, check the heater's exact age first — the serial number on the rating plate carries the build date. A tank at year 8 with a bad element is worth fixing; the same tank at year 13 is not.

How much does it cost to replace a 50-gallon water heater?

$1,100 to $2,200 installed for a 50-gallon tank in the same spot — the most common size for a family home. Electric sits at the low end of that, gas a few hundred dollars higher for the venting. The unit is $500 to $1,000 of it; the rest is labor plus a permit and, on most modern installs, a new expansion tank.

What does installation cost?

A plumber charges $150 to $450 in labor to swap a tank for the same kind, and the job takes two to three hours. A tankless conversion or a fuel switch runs $600 to $1,900 and four to eight hours because of the added gas, venting, and electrical work.

DIY drops the cost to the unit price plus fittings, but a gas connection and combustion venting are genuinely dangerous to get wrong, and many jurisdictions require a permit and inspection for a water heater regardless of who does the work.

What adds to the price?

The base range assumes the space is code-compliant and reusable. When it is not:

Add it up and a "simple" $1,200 quote can land near $2,000 once a permit, an expansion tank, and new connectors are in.

Is a heat pump water heater worth the extra?

Usually, if you have the space for it. A hybrid heat pump heater costs about $800 to $1,500 more installed than a standard electric tank but uses roughly a third of the electricity, so most households recover the difference in three to five years and save every year after. It needs a spot with enough air volume (a garage or basement, not a closet), a condensate drain, and it runs cooler and slightly noisier than a tank.

One caveat on timing: the federal 25C tax credit that covered 30% of a heat pump water heater, up to $2,000, expired on 31 December 2025 and does not apply to a 2026 install. Check your state energy office and utility — many still offer rebates.

Should you replace it before it fails?

Past 10 to 12 years, yes — on your schedule, not the tank's. A water heater almost always fails by leaking rather than by going cold, so a late replacement is an emergency call plus water damage plus a rush-job price. Replacing a working 12-year-old tank on a normal weekday costs less than replacing a burst one on a Sunday. (How long a water heater lasts covers the timeline by age; repair or replace walks the decision once something has actually failed.)

Replace now, not later, if:

• Water is pooling or seeping at the base of the tank — a leaking tank cannot be repaired.
• The hot water runs rusty or smells metallic while the cold runs clear.
• It rumbles or pops loudly during heating (heavy sediment).
• It is over 10 years old and facing any repair beyond a $150 element or thermocouple.

If you are weighing a specific repair quote against a new unit, start with the age — the same $250 repair that is worth paying at year 6 is not at year 13. And because a water heater is a when-not-if expense, the maintenance budget calculator folds one into a yearly figure so the replacement isn't a surprise.

How to keep the cost down

• Replace with the same type unless you have a real reason to convert. A tankless or fuel switch multiplies the labor — tank vs tankless walks through whether that reason is worth it.
• Buy the unit yourself and pay a plumber for labor only — you skip the markup.
• Get two or three quotes. Water heater install pricing varies more between contractors than almost any other home job.
• Do it before it fails. An emergency replacement costs more and gives you no time to shop.
• Replace the anode rod on the next one at year 4–5 — a cheap part that is the main reason some tanks reach 20 years and most don't reach 12.