Cost to Run a Heat Pump Water Heater in Illinois
Illinois's average residential electricity rate is 23.9¢/kWh as of May 2026 — the 40th cheapest in the country, 30% above the U.S. average. At typical usage (3 hours/day), a heat pump water heater here costs $21.80 per month.
Per hour
$0.24
at 400–1,500 W
Per day
$0.72
3 hours/day
Per month
$21.80
91 kWh
Per year
$262
1,095 kWh
By usage level in Illinois
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (1.5 hrs/day) | $0.36 | $10.90 | $131 |
| Typical (3 hrs/day) | $0.72 | $21.80 | $262 |
| Heavy (6 hrs/day) | $1.43 | $43.59 | $523 |
Illinois vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a heat pump water heater in Illinois?
At Illinois's current average residential rate of 23.9¢/kWh (May 2026), a heat pump water heater with typical usage costs about $0.72 per day, $21.80 per month, or $262 per year.
Is running a heat pump water heater in Illinois more expensive than average?
Yes. Illinois's electricity costs about 30% more than the U.S. average, so the same usage costs $21.80 per month here versus $16.78 nationally.
What does electricity cost in Illinois right now?
Illinois residents pay an average of 23.9¢ per kWh as of May 2026 — the 40th cheapest rate of the 51 U.S. jurisdictions we track.