Replacing a water heater costs a national average of $1,348, with most homeowners paying $882 to $1,826, based on 30,979 verified projects reported to Angi.1 A standard tank unit runs $600 to $3,100 installed; tankless systems run $1,400 to $5,600.2 Fixr’s average is $1,400 for a gas tank install.3 Prices below are national averages* for 2026.
*National averages, not local quotes. Your price depends on system type, tank size, fuel source, venting, permits, and local labor rates.
$1,348
average replacement, Angi (30,979 projects)
$600 – $3,100
tank installed, HomeGuide
$1,400 – $5,600
tankless installed, HomeGuide
~50%
share that is labor, Angi
Quick math: labor is about half the bill on a straight swap1 — roughly $675 of Angi’s $1,348 average (our arithmetic). HomeGuide prices tank labor at $200 to $1,000 for a 2-to-6-hour job2, so a $900 mid-range 50-gallon unit plus $400 of labor lands near $1,300, right on the national average.
Tank vs tankless
| Type | Unit price | Installed cost | Lifespan |
|---|---|---|---|
| Standard tank (40–50 gal) | $400 – $2,100 | $600 – $3,100 | 8 – 12 years |
| Tankless | $600 – $2,600 | $1,400 – $5,600 | 15 – 20 years |
| Hybrid heat pump | $1,500 – $3,000 | $2,000 – $4,600 | — |
| Indirect | $1,500 – $3,000 | $2,000 – $4,500 | — |
| Solar | $1,000 – $6,000 | $3,000 – $9,000 | 20 years |
All figures from HomeGuide2; Angi’s ranges agree on tank ($600 to $2,500) and tankless ($1,400 to $3,900).1 Converting from tank to tankless is the expensive path: $600 to $2,500 in labor alone because the job needs replumbing, new venting, and often gas-line or electrical upgrades.2 Angi adds that tankless repairs also run higher later — $100 to $1,300 versus $100 to $500 for tank units.1
Cost by tank size
| Tank size | Installed cost (HomeGuide) | Household fit (Angi) |
|---|---|---|
| 30 gallon | $500 – $1,900 | 1 – 2 people |
| 40 gallon | $600 – $3,000 | 1 – 4 people |
| 50 gallon | $700 – $3,100 | 3 – 5 people |
| 65 gallon | $900 – $3,400 | — |
| 75 gallon | $1,100 – $3,600 | 4 – 6 people |
| 80 gallon | $1,200 – $4,000 | high-demand homes |
Angi’s per-size figures run higher at the top end (its 80-gallon row reaches $7,500 with premium units and difficult installs)1 while HomeGuide caps that size at $4,0002 — a disagreement worth knowing before you budget a large-tank job.
Extra costs to budget
| Extra | Average cost | Source |
|---|---|---|
| Old unit removal & disposal | $75 – $500 | HomeGuide2 |
| Permits | $25 – $300 (+$50 – $300 for gas work) | Angi1 |
| Power-vent upgrade | +$350 – $500 vs direct vent | HomeGuide2 |
| Expansion tank | $100 – $400 | HomeGuide2 |
| New dedicated electrical circuit | $250 – $900 | HomeGuide2 |
| Gas line upgrade | $350 – $2,000 | HomeGuide2 |
| Relocating the unit | $150 – $3,400 | Angi1 |
Plumbers charge $45 to $200 per hour; electricians $50 to $100.1 Emergency or after-hours installs carry surcharges.2
Does tankless actually save money?
HomeGuide publishes annual operating costs for both types, and the honest answer is “it depends on fuel.” For electric units, the midpoints are $565 per year (tank) versus $440 (tankless) — about $125 saved per year. Against roughly $1,650 of extra upfront cost at the midpoints, that is a 13-year payback from energy savings alone, longer than HomeGuide’s general 3-to-7-year estimate for efficient equipment.2 On gas, the published ranges actually overlap the wrong way — the tankless midpoint ($350) is a touch above the tank midpoint ($335) — so do not count on gas-bill savings to justify the switch.2 The stronger tankless case is lifespan (15 to 20 years versus 8 to 12), endless hot water, and freed floor space.2
Worked examples
Example 1 — 50-gallon gas tank swap, family of four. HomeGuide: $700 to $3,100 installed.2 Angi’s 50-gallon row: $800 to $2,500.1 The $800 to $2,500 overlap is the well-supported band; Fixr’s $1,400 average sits inside it.3
Example 2 — same-size replacement, labor check. A like-for-like tank swap takes a plumber 2 to 6 hours at $200 to $1,000 in labor.2 Against Angi’s rule that labor is about half the total1, a $400 labor bill implies a $1,200 to $1,600 all-in job with a mid-range unit — consistent with the national average. Our arithmetic, their rates.
Example 3 — adding the extras. A realistic gas-tank replacement with old-unit disposal ($75 to $500), permits ($25 to $300) and an expansion tank ($100 to $400) adds $200 to $1,200 on top of the unit-and-labor price — the difference between a $1,200 swap and a $2,400 one. All three addends from the sources above; the sum is ours. Illustrative, not a quote.
FAQ
How long does a water heater last? Tank units: 8 to 12 years. Tankless: 15 to 20.2
What size do I need? 30 gallons for 1 to 2 people, 40 for up to 4, 50 for 3 to 5, and 75+ for large households.1
Do I need a permit to replace a water heater? Usually yes — $25 to $300, plus $50 to $300 more if gas lines are touched.1
Is a gas or electric install cheaper? Units themselves are similar ($550 to $1,500 for most of either type); gas needs venting, which adds cost, while electric may need a dedicated circuit ($250 to $900).12
Any safety must-dos? Gas units must vent properly to prevent carbon monoxide exposure — install a CO detector nearby and have the unit inspected annually.1
Sources
- Angi, How Much Does Water Heater Replacement Cost? (2026 data; averages from 30,979 verified projects).
- HomeGuide, How Much Does Water Heater Installation or Replacement Cost? (2026).
- Fixr, How Much Does It Cost to Install a Water Heater? (2026).
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