Montana Electricity Prices

Relatively, yes — 14.67¢ per kilowatt-hour in May 2026, 13th-cheapest of 51 and 24.4% below the national benchmark.

At Montana's May 2026 average of 14.67¢/kWh, 10,500 kWh of annual use works out to $1,540 a year — around $128 a month. Running the same 10,500 kWh calculation at the May 2026 national benchmark rate gives $2,038 — a $498 gap between the two published averages, less for Montana, not a bill either way.

Over the full EIA series the Montana jurisdiction average has risen 128% since January 2001, from 6.44¢ to 14.67¢ in May 2026 — a compound 3.3% per year. The path has been unusually smooth — Montana is among the steadiest third of jurisdictions month to month.

June 2025, at 14.81¢ per kilowatt-hour. The May 2026 reading of 14.67¢ sits 0.9% below that peak. The lowest monthly average on record was 6.31¢ in April 2001.

September. Measured over the 25 complete calendar years the EIA series covers for Montana, 2001 through 2025, September runs highest relative to its own year and January runs lowest — a swing of roughly 12.3 percentage points.

Among Montana and its land-border neighbours in May 2026, Idaho posts the lowest average at 12.35¢ and South Dakota the highest at 15.73¢. Montana ranks 3rd of 5 in the group, at 14.67¢.

Almost certainly not exactly, and this is the one caveat that governs every figure on this page. The published value is the EIA residential average across every utility and residential rate class in Montana for May 2026 — a benchmark, never a billed amount. Even the jurisdiction figure is not one number — across the trailing year it moved between 12.77¢ in December 2025 and 14.81¢ in June 2025. Your own rate depends on your utility, tariff, usage tier, time-of-use schedule, and fixed monthly charges, none of which this index models. Read your bill for the rate that applies to you.