Cost to Run a Tankless Electric Water Heater in Missouri
Missouri's average residential electricity rate is 16.1¢/kWh as of July 2026 — the 25th cheapest in the country, 12% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $61.67 per month.
Per hour
$2.90
at 13,000–27,000 W
Per day
$2.03
0.7 hours/day
Per month
$61.67
383 kWh
Per year
$740
4,599 kWh
By usage level in Missouri
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.01 | $30.83 | $370 |
| Typical (0.7 hrs/day) | $2.03 | $61.67 | $740 |
| Heavy (1.4 hrs/day) | $4.06 | $123 | $1,481 |
Missouri vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a tankless electric water heater in Missouri?
At Missouri's current average residential rate of 16.1¢/kWh (July 2026), a tankless electric water heater with typical usage costs about $2.03 per day, $61.67 per month, or $740 per year.
Is running a tankless electric water heater in Missouri more expensive than average?
No — it's cheaper. Missouri's rate is about 12% below the U.S. average: $61.67 per month here versus $70.10 nationally.
What does electricity cost in Missouri right now?
Missouri residents pay an average of 16.1¢ per kWh as of July 2026 — the 25th cheapest rate of the 51 U.S. jurisdictions we track.