Cost to Run a Incandescent Bulb in Montana
Montana's average residential electricity rate is 14.7¢/kWh as of May 2026 — the 13th cheapest in the country, 20% below the U.S. average. At typical usage (5 hours/day), a incandescent bulb here costs $1.34 per month.
Per hour
0.9¢
at 40–100 W
Per day
4.4¢
5 hours/day
Per month
$1.34
9.1 kWh
Per year
$16.10
110 kWh
By usage level in Montana
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (2.5 hrs/day) | 2.2¢ | $0.67 | $8.05 |
| Typical (5 hrs/day) | 4.4¢ | $1.34 | $16.10 |
| Heavy (10 hrs/day) | 8.8¢ | $2.68 | $32.19 |
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 14.7¢/kWh (May 2026), a incandescent bulb with typical usage costs about 4.4¢ per day, $1.34 per month, or $16.10 per year.
Is running a incandescent bulb in Montana more expensive than average?
No — it's cheaper. Montana's rate is about 20% below the U.S. average: $1.34 per month here versus $1.68 nationally.
What does electricity cost in Montana right now?
Montana residents pay an average of 14.7¢ per kWh as of May 2026 — the 13th cheapest rate of the 51 U.S. jurisdictions we track.