As of September 2015
NorthWestern Energy tariffs are provided online for both electric and natural gas services. The drop-down menus to the left provide links to the online tariffs. The links to the right will take you to rate summaries as well as to our rate comparison tool.
Natural Gas Rates
Electric Transmission Tariff
Natural Gas Service Rules
Electric Service Rules
Propane Service Rules
Customer Choice Schedules
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If you have questions about the tariff sheets, email us
NorthWestern Energy recently filed its Propane Supply Rate Adjustment and Annual Tracking Mechanism for Propane Supply at Townsend, Montana, with the Montana Public Service Commission under Docket No. D2015.4.40. Click here to download a PDF of the filing.
NorthWestern Energy filed its current Electric Supply Resource Procurement Plan with the Montana Public Service Commission. Click here to download the plan from our website.
Natural Gas Supply
NorthWestern Energy filed its current Natural Gas Biennial Procurement Plan with the Montana Public Service Commission. Click here to download the plan from our website.
General Rate Case Filing
NorthWestern Energy recently filed its general rate filing seeking approval to change several components of its delivery services charges for Montana electricity and natural gas customers. Click here to access the documents related to this filing.
The rate schedules and service rules are in .PDF format. If you do not have Adobe Acrobat Reader installed on your computer, you will need to download it free from the Adobe Site to view the documents.
NorthWestern Energy's FERC electric Open Access Transmission Tariff is provided online in WORD format. If you would like to print or read either of these documents, we recommend you download them. If you do not have access to Microsoft Word, you can download the Microsoft Word Viewer free from Microsoft.
To Find Out More About Our Tariffs
NorthWestern Energy provides natural gas and electricity services through tariffs filed with and approved by the Montana Public Service Commission (MPSC). Users of electronic tariffs should note that such tariffs are not the official documents, and users assume responsibility for reliance upon tariffs in electronic format.