Cost to Run a Tankless Electric Water Heater in Mississippi
Mississippi's average residential electricity rate is 16.8¢/kWh as of April 2026 — the 27th cheapest in the country, 11% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $64.35 per month.
Per hour
$3.02
at 13,000–27,000 W
Per day
$2.12
0.7 hours/day
Per month
$64.35
383 kWh
Per year
$773
4,599 kWh
By usage level in Mississippi
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.06 | $32.18 | $386 |
| Typical (0.7 hrs/day) | $2.12 | $64.35 | $773 |
| Heavy (1.4 hrs/day) | $4.23 | $129 | $1,545 |
Mississippi 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 Mississippi?
At Mississippi's current average residential rate of 16.8¢/kWh (April 2026), a tankless electric water heater with typical usage costs about $2.12 per day, $64.35 per month, or $773 per year.
Is running a tankless electric water heater in Mississippi more expensive than average?
No — it's cheaper. Mississippi's rate is about 11% below the U.S. average: $64.35 per month here versus $72.01 nationally.
What does electricity cost in Mississippi right now?
Mississippi residents pay an average of 16.8¢ per kWh as of April 2026 — the 27th cheapest rate of the 51 U.S. jurisdictions we track.