Rate Comparison Information

We work to keep costs as low as possible while meeting our commitment to ensure that your lights and heat come on when you need them.

NorthWestern Energy historically has had rates that are among the lowest in the nation. If you are planning to relocate your family or business, this information may help you estimate the cost difference of your monthly electricity and/or natural gas bill.

Residential Electric Monthly Costs - July 2025

Our electric rates are well below the national average of $143 per month for a residential customer using 750 kWh per month.

  • $123 per month for a NorthWestern Energy customer in Montana
  • $121 per month for a NorthWestern Energy customer in South Dakota

 

Map showing comparison of electric rates across the country.

  • 750 kWh Bundled Service - Supply & Delivery Costs
  • U.S. National Average - $134/month

 

Source:  Edison Electric Institute Typical Bills and Average Rates Report, Jan. 1, 2025. EEI releases this report twice a year - in January and July.

 

Residential Natural Gas Average Monthly State Costs - July 2025

Our natural gas rates are well below the national average of $254 per month for a residential customer using 100 therms per month.

  • $82 per month for a NorthWestern Energy customer in Montana
  • $183 per month for a NorthWestern Energy customer in South Dakota
  • $161 per month for a NorthWestern Energy customer in Nebraska
Map showing a comparison of gas rates across the US


  • Bundled Service - Supply & Delivery Costs
  • Monthly Cost for 100 Therms - As of July 2025
  • U.S. National Average - $254/month

 

Source: www.eia.doe.gov.  - US Natural Gas Sector Report for average cost of gas sold in July 2025. NorthWestern Energy costs are calculated by dividing total revenues by total sales. 

Note: Electric rates are as of July 2025 as published in the Edison Electric Institute (EEI) Typical Bills and Average Rate Report. Natural gas rates are state-level averages cost of gas sold for 100 therms as of July 2025 from the Energy Information Administration Department of Energy website: www.eia.doe.gov. NorthWestern Energy natural gas rates for Montana, Nebraska, and South Dakota are average cost of gas sold for 100 therms as of July 2025. To see NorthWestern Energy’s current monthly electric and natural gas rates go to: Rates and Tariffs.

Rates & Tariffs

We're dedicated to providing our customers with energy services that are both affordable and reliable. Our rates and tariffs are filed with and approved by the Montana Public Service Commission, the Nebraska Public Service Commission, and the South Dakota Public Utilities Commission, ensuring that our rates are fair and transparent for all of our customers. Find electric and gas rates and tariffs information as well regulatory filings for Montana, Nebraska, and South Dakota.
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