NorthWestern Energy Homepage
NWE Contact Bar, in Montana dial 1-888-467-2669, in South Dakota or Nebraska dial 1-800-245-6977

NorthWestern Energy Files Annual Electric Supply-Cost Tracker with Montana Public Service Commission

Jun 05, 2017
Butte, Mont. – June 5, 2017 – NorthWestern Energy has submitted its annual electricity supply cost tracker to the Montana Public Service Commission for review.

The annual tracking period begins July 1 and ends on the following June 30. The supply cost rate that appears on customer bills fluctuates slightly on a monthly basis depending on market supply costs and other factors. The annual filing serves to “true-up” actual to estimated costs over the previous tracking period and establishes a rate based on forecast costs for the coming tracker year.

Overall, energy costs remain very stable due to NorthWestern’s regulated ownership of generation resources, including partial ownership of Colstrip Unit 4, the Dave Gates Generating Station, the Spion Kop Wind Generation Project and company’s hydroelectric dams.

The typical bill calculations used in the filing reflect a decrease in the Competitive Transition Charge for Qualifying Facilities rate which is also effective July 1, 2017. These rates, when multiplied by the customer’s usage, are included in the total bill along with the energy delivery charge.

When the increase in the overall supply rate is combined with the decrease in the Competitive Transition Charge for Qualifying Facilities, the typical residential bill will decrease about three cents per month, or 36 cents per year. The actual decrease will depend on each customer’s type and usage.

As a reminder, energy supply cost rates adjust monthly and have remained very stable through the purchase of regulated hydro, wind and coal resources. Energy market supply costs are dependent on weather conditions and overall supply and demand factors that are not entirely predictable. Energy delivery costs do not adjust on a monthly basis and are also subject to periodic regulatory rate reviews.

Anyone interested in reviewing the filing in its entirety may do so by accessing it at or by contacting the Montana Public Service Commission either at its office in Helena or at

For more news about NorthWestern Energy, follow us on Facebook and on Twitter (NorthWestern_MT). 

About NorthWestern Energy
NorthWestern Energy provides electricity and natural gas in the Upper Midwest and Northwest, serving approximately 701,000 customers in Montana, South Dakota and Nebraska.  More information on NorthWestern Energy is available on the company's website at

Investor Relations:
Travis Meyer
(605) 978-2967

Media Contact:
Butch Larcombe
(866) 622-8081



Contact Us | Terms of use | Glossary | PO Terms & Conditions | EEO | ©2016 NorthWestern Energy. All rights reserved.