Cost to Run a Incandescent Bulb in Montana
Montana's average residential electricity rate is 13.9¢/kWh as of April 2026 — the 7th cheapest in the country, 26% below the U.S. average. At typical usage (5 hours/day), a incandescent bulb here costs $1.27 per month.
Per hour
0.8¢
at 40–100 W
Per day
4.2¢
5 hours/day
Per month
$1.27
9.1 kWh
Per year
$15.22
110 kWh
By usage level in Montana
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (2.5 hrs/day) | 2.1¢ | $0.63 | $7.61 |
| Typical (5 hrs/day) | 4.2¢ | $1.27 | $15.22 |
| Heavy (10 hrs/day) | 8.3¢ | $2.54 | $30.44 |
Montana vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a incandescent bulb in Montana?
At Montana's current average residential rate of 13.9¢/kWh (April 2026), a incandescent bulb with typical usage costs about 4.2¢ per day, $1.27 per month, or $15.22 per year.
Is running a incandescent bulb in Montana more expensive than average?
No — it's cheaper. Montana's rate is about 26% below the U.S. average: $1.27 per month here versus $1.71 nationally.
What does electricity cost in Montana right now?
Montana residents pay an average of 13.9¢ per kWh as of April 2026 — the 7th cheapest rate of the 51 U.S. jurisdictions we track.