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EnergySavings · Montana · Comparison

NorthWestern Energy LLC vs Flathead Electric Coop Inc: who pays less in Montana?

Data as of: EIA-861 annual 2024 (released 2025) · EIA monthly state prices February 2026 · EIA weekly heating-fuel survey Mar 30, 2026 · retail-choice registry reviewed Jun 2026 · URDB tariffs pulled Jun 2026. Page generated 2026-06-12.

Flathead Electric Coop Inc customers paid less: an average 9.67¢/kWh in 2024 versus 14.23¢/kWh at NorthWestern Energy LLC (EIA-861) — a gap of 4.56¢/kWh, worth about $493 per year at typical usage (10,800 kWh/yr). Their territories meet in 3 MT counties (Carbon, Park, Sanders). You cannot switch wires companies — the territory is set by your address.

Side by side (MT, EIA-861)

NorthWestern Energy LLC vs Flathead Electric Coop Inc — residential averages from federal EIA-861 filings
MetricNorthWestern Energy LLCFlathead Electric Coop Inc
2024 average price, ¢/kWh14.239.67
2023 average price, ¢/kWh14.619.50
Annual cost at 10,800 kWh, $/yr$1,537$1,044
Residential customers (2024)328,12563,317
OwnershipInvestor-ownedCo-op
Counties served in MT366

Average price = residential revenue ÷ sales (bundled service): the all-in price customers actually paid, including supply, delivery and riders. Profiles: NorthWestern Energy LLC · Flathead Electric Coop Inc · Montana overview.

Where the territories meet

Both utilities file EIA-861 service territory in: Carbon · Park · Sanders counties (MT, 2024).

Adjoining or overlapping territory in a county does not mean households there can pick between the two — service maps are parcel-level and fixed. The county overlap mainly matters when choosing where to live or comparing town-level costs.

Can you actually choose between them?

No — not for delivery. Distribution territories are exclusive and set by address; NorthWestern Energy LLC and Flathead Electric Coop Inc do not compete for the same meters. Montana is a regulated retail market — there is no residential supplier shopping; rates are set in utility-commission proceedings (psc.mt.gov). The price gap above mainly matters when choosing where to live, comparing towns, or benchmarking your bill.

Questions people ask

Is NorthWestern Energy LLC cheaper than Flathead Electric Coop Inc?
No — in 2024 NorthWestern Energy LLC customers averaged 14.23 cents/kWh versus 9.67 for Flathead Electric Coop Inc (EIA-861). Flathead Electric Coop Inc was cheaper by 4.56 cents, about $493 per year at 10,800 kWh.
Can I switch from NorthWestern Energy LLC to Flathead Electric Coop Inc?
No — distribution territories are exclusive and set by address; you cannot pick between the two wires companies. Montana has no residential supplier shopping either; rates are set in utility-commission proceedings.
Why is NorthWestern Energy LLC more expensive than Flathead Electric Coop Inc?
EIA-861 averages reflect everything customers actually paid — supply costs, delivery rates, riders, and surcharges across each territory. Differences in generation mix, grid investment, storm costs, and customer density between NorthWestern Energy and Flathead Electric Coop territory all feed the 4.56-cent gap.
About these numbers. Rates shown are averages computed from federal regulatory filings (EIA Form 861) and public tariff databases — confirm with your utility before making decisions; your actual rate depends on your tariff, usage, and riders. Distribution utility is determined by address and generally cannot be chosen; in retail-choice states you may choose your supplier for the supply portion of the bill. Savings figures use 10,800 kWh/yr (US average residential usage) and are estimates, not quotes. EnergySavings is an independent data project by CertiHomes and is not affiliated with any utility, supplier, or government agency.