Electric Water Heater Running Cost
See exactly what your electric water heater costs per day, month and year at US electricity rates.
A 50-gallon electric water heater costs roughly $1.17/day, $35/month, and $427/year for a family of 4 at the US average electricity rate of $0.13/kWh.
Calculate Electric Water Heater Cost
Electric Water Heater Monthly Cost by Tank Size (US 2026)
| Tank Size | 1–2 People | 3–4 People | 5+ People |
|---|---|---|---|
| 30 gal | ~$17/mo | ~$26/mo | ~$35/mo |
| 40 gal | ~$18/mo | ~$30/mo | ~$44/mo |
| 50 gal | ~$19/mo | ~$35/mo | ~$53/mo |
| 80 gal | ~$21/mo | ~$38/mo | ~$58/mo |
$0.13/kWh, 92% efficiency, 120°F target temp. US 2026 average rates.
What Affects Electric Water Heater Running Cost?
Your electricity rate is the biggest factor. A family of 4 with a 50-gallon heater pays ~$35/month at $0.13/kWh but ~$54/month at $0.20/kWh. Check your utility bill and use the calculator above for an accurate estimate.
Tank size has less impact than most people expect. A larger tank holds more hot water but does not necessarily use more energy unless your household consistently demands more hot water than a smaller tank can supply.
Water heater age and insulation matter too. Heaters older than 10 years lose efficiency through tank heat loss. Adding an insulating blanket to older tanks can reduce standby heat loss by 25–45%. See how costs compare in our water heater cost calculator or explore the heat pump water heater cost guide to see the savings available from upgrading.
Electric Water Heater Cost — FAQs
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