Idaho vs Montana electricity prices: 11.83 ¢ against 12.99 ¢ per kWh
45 places apart: Idaho #49, Montana #4 of 51, the widest of 31 measures. coal share of generation Idaho 0.0%, Montana 36.0%; CO2 per mwh of generation, lb Idaho 313, Montana 1,056. Typical bills differ by $0 a month, higher in Montana.
Over a year the typical energy bill differs by $5 ($110 a month in Idaho, $111 in Montana). Since 2015 the home price rose +19.1% in Idaho and +19.4% in Montana: 0.3 points more in Montana. Against the U.S. home average Idaho sits at -31.3% and Montana at -24.6%.
Where the power in Idaho and Montana comes from
Fuels with the widest gaps, Idaho against Montana.
| Fuel | Idaho | Montana | Gap |
|---|---|---|---|
| Coal | 0.0% | 36.0% | 36.0 points, higher in Montana |
| Gas | 31.4% | 4.9% | 26.5 points, higher in Idaho |
| Hydro | 43.6% | 31.6% | 12.1 points, higher in Idaho |
| Wind | 13.9% | 23.3% | 9.4 points, higher in Montana |
Idaho against Montana: widest gaps
| Measure | Idaho | Montana | Gap | Rank (of 51) |
|---|---|---|---|---|
| Petroleum share of generation | 0.0% | 1.8% | -1.8 points | #49 / #4 |
| Coal share of generation | 0.0% | 36.0% | -36.0 points | #45 / #9 |
| CO2 per MWh of generation, lb | 313 | 1,056 | -743 | #47 / #12 |
| Business price 2025, ¢/kWh | 9.29 | 11.88 | -2.59 ¢ | #46 / #26 |
| Gas share of generation | 31.4% | 4.9% | +26.5 points | #31 / #48 |
| Time-of-use utilities | 60% | 40% | +20.0 points | #14 / #29 |
| Smart meters, share of homes | 81% | 28% | +52.9 points | #32 / #46 |
31 measures compared for Idaho and Montana; the CSV holds the 7 widest.
CSVIdaho and Montana on the map
Idaho and Montana: price over time
Home price, Idaho and Montana, 2010 to 2025: 16 rows
| Year | Idaho | Montana | Gap to U.S. |
|---|---|---|---|
| 2010 | 7.99 | 9.16 | -3.55 |
| 2011 | 7.87 | 9.75 | -3.85 |
| 2012 | 8.67 | 10.08 | -3.21 |
| 2013 | 9.32 | 10.33 | -2.81 |
| 2014 | 9.72 | 10.18 | -2.80 |
| 2015 | 9.93 | 10.88 | -2.72 |
| 2016 | 9.95 | 10.94 | -2.60 |
| 2017 | 10.04 | 10.95 | -2.85 |
| 2018 | 10.15 | 10.96 | -2.72 |
| 2019 | 9.89 | 11.13 | -3.12 |
| 2020 | 9.95 | 11.24 | -3.20 |
| 2021 | 10.16 | 11.22 | -3.50 |
| 2022 | 10.37 | 11.33 | -4.67 |
| 2023 | 11.05 | 12.54 | -4.95 |
| 2024 | 11.52 | 12.66 | -4.96 |
| 2025 | 11.83 | 12.99 | -5.40 |
Idaho 7.99 to 11.83 ¢ and Montana 9.16 to 12.99 ¢ between 2010 and 2025 (EIA).
CSVYour bill in Idaho and in Montana
Where Idaho and Montana are alike
- Heat pump saving on gas: -48% and -39%
- Heat pump break-even COP: 4.44 and 4.17
- Price change 2024 to 2025: +2.7% and +2.6%
- Price change, 2026 to date: +11.7% and +10.8%
- Price change since 2015: +19% and +19%
Sources and dates: data sources.
Questions
Is Idaho or Montana higher on petroleum share of generation?
Montana, by 1.8 points; they rank #49 and #4 of 51.
Is Idaho or Montana higher on coal share of generation?
Montana, by 36.0 points; they rank #45 and #9 of 51.
Is Idaho or Montana higher on CO2 per mwh of generation?
Montana, by 743; they rank #47 and #12 of 51.
Is Idaho or Montana higher on business price 2025?
Montana, by 2.59 ¢; they rank #46 and #26 of 51.
Is Idaho or Montana higher on gas share of generation?
Idaho, by 26.5 points; they rank #31 and #48 of 51.
What would 874 kWh a month cost in Idaho and in Montana?
Idaho $103, Montana $114: $10 apart, energy only.
Where do Idaho and Montana match most closely?
heat pump saving on gas (-48% and -39%); heat pump break-even COP (4.44 and 4.17); price change 2024 to 2025 (+2.7% and +2.6%).