Cost to Run a Tankless Electric Water Heater in Missouri
Missouri's average residential electricity rate is 14¢/kWh as of April 2026 — the 8th cheapest in the country, 26% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $53.63 per month.
Per hour
$2.52
at 13,000–27,000 W
Per day
$1.76
0.7 hours/day
Per month
$53.63
383 kWh
Per year
$644
4,599 kWh
By usage level in Missouri
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.88 | $26.81 | $322 |
| Typical (0.7 hrs/day) | $1.76 | $53.63 | $644 |
| Heavy (1.4 hrs/day) | $3.53 | $107 | $1,288 |
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 14¢/kWh (April 2026), a tankless electric water heater with typical usage costs about $1.76 per day, $53.63 per month, or $644 per year.
Is running a tankless electric water heater in Missouri more expensive than average?
No — it's cheaper. Missouri's rate is about 26% below the U.S. average: $53.63 per month here versus $72.01 nationally.
What does electricity cost in Missouri right now?
Missouri residents pay an average of 14¢ per kWh as of April 2026 — the 8th cheapest rate of the 51 U.S. jurisdictions we track.