Utility Cost Calculators Montana

Montana Utility Cost Calculator

Montana utilities: about $281 a month for a typical home (electric ~$128, gas ~$37, water ~$42, internet ~$74) at EIA's 14.99¢/kWh. Try your own numbers.

Typical total monthly utility bill in Montana: $281 for a 1,800 sq ft home with 3 occupants -- $128 electricity, $37 natural gas, $42 water/sewer, and $74 internet under this page's default assumptions. Change the inputs below, or compare states with the utility bill estimator.

What sets Montana utility bills
Measure	Montana	Rank, normal or source
Electricity price, July 2026	14.99¢ per kWh (July 2025 14.27¢, +5.0%)	37th highest of 50; 18% below U.S.
Use per home, 2024	852 kWh a month	29th highest of 50; 1% below U.S.
Electric bill	852 kWh × 14.99¢ = $127.71, about $128	2024: $107.91 at 12.66¢, 46th highest of 50
Natural gas, 2025 average	$8.99 per Mcf (about $0.87 per therm)	43rd highest of 44 (2025 averages); July 2026 $12.4, not used
Heating degree days, Jul 2025–Jun 2026	7,168	normal 8,310, 14% below
Cooling degree days, same months	293	normal 248, 18% above
Home energy, 2024	natural gas 41.1%, electricity 35.9%, heating oil and propane 13.5%, wood 8.7%	EIA SEDS, at the meter
In-state generation, 2024	coal 36.4%, hydroelectric 34.3%, wind 21.6%	EIA-923
Largest residential sellers, 2024	NorthWestern Energy LLC - (MT) (investor-owned) 49.1%; Flathead Electric Coop Inc (cooperative) 16%	EIA-861

EIA (EPM 5.6.A, EIA-861, gas annual prices at 10.37 therms per Mcf) read 2026-10-11; NOAA CPC, EIA SEDS and EIA-923 2026-10-13.

By StateCalc Team

Updated Oct 22, 2026 Estimate — not official figures

Use Calculator Free — No Sign-up Instant Results Updated Oct 2026

Estimate only — these are not official figures

EIA use and prices for Montana; home-size scaling, gas use, water and internet modeled

Do not rely on these amounts for budgeting or payment. For exact amounts, check the residential rate of NorthWestern Energy LLC - (MT) or your own utility.

This calculator requires JavaScript. Please enable JavaScript in your browser to change the inputs and recalculate the result.

Enter Your Details

Adjust values to see instant results

Home Size (sq ft)

20010000

Number of Occupants

110

Electric Rate ($/kWh)

0.050.6

Pre-filled: EIA Electric Power Monthly, Table 5.6.A (Residential, July 2026)

Natural Gas Rate ($/therm)

0.38

Pre-filled: EIA residential natural gas price, 2025 annual average ($8.99/Mcf)

Additional Details

Water Rate ($/1000 gal)

120

Montana COL Index

50200

Pre-filled: C2ER Cost of Living Index (via MERIC)

Monthly Electric Bill

$128.00

Estimated • Based on your inputs

Total Monthly Utilities

$281.00

Annual Utility Costs

$3,372.00

Detailed Breakdown

Monthly Gas Bill$37.00

23%

Monthly Water & Sewer$42.00

27%

Internet & Cable (Est.)$74.00

47%

% of Median Income4.48%

Cost per Sq Ft/Month$0.16

Disclaimer: This calculator provides estimates for informational purposes only. Results should not be considered financial, tax, or legal advice. Consult a qualified professional for your specific situation.

Montana Quick Facts

5.65% Income Tax Rate

0.61% Property Tax Rate

$75,340 Median Income

106 Cost of Living

How This Calculator Works

Calculation methodology and assumptions

Montana inputs: 852 kWh a month (EIA-861 2024) × 14.99¢ (EIA, July 2026), scaled to your home size and occupants; gas $8.99/Mcf ÷ 10.37 = $0.8669/therm (EIA 2025 annual average); water $5.83 per 1,000 gallons and internet $74/month, both from cost-of-living index 106; income share on $75,340.

Key State Information

557,432 Montana residential electricity customers (EIA-861, 2024) · cost-of-living index 106 · median household income $75,340.

Standard financial formulas Pre-filled with documented models and state context Estimates only — not financial advice

Data Source

U.S. Energy Information Administration (EIA), Form EIA-861 & monthly energy reports

View Original Source | Source record reviewed Aug 7, 2026 | Review target: annually

What drives Montana utility bills

Heating is Montana's larger weather load: a normal July-to-June brings 8,310 heating against 248 cooling degree days. The 2025–26 heating season peaked in Jan 2026.

Natural gas supplied 41.1% of Montana home energy in 2024, electricity 35.9%. Heating oil and propane (13.5%) are not priced here: add that fuel bill if your home burns either. Wood supplied 8.7%.

NorthWestern Energy LLC - (MT) sold 49.1% of Montana's 2024 residential electricity, Flathead Electric Coop Inc 16%.

Montana degree days by month
Month	Heating	Cooling
Jul 2025	37	120
Aug 2025	31	112
Sep 2025	154	32
Oct 2025	678	0
Nov 2025	865	0
Dec 2025	1,090	0
Jan 2026	1,156	0
Feb 2026	919	0
Mar 2026	852	0
Apr 2026	731	0
May 2026	396	18
Jun 2026	259	11

StateCalc Team

Editorial Team

The StateCalc team builds free financial calculators using data from official government sources including the IRS, U.S. Census Bureau, BLS, and state revenue departments. All formulas are validated by an automated test suite and cross-referenced against published data.

Our editorial standards