Important Message  Due to a system maintenance scheduled to begin at 6pm on Thursday, November 14th, our Contact Centers will be staffed for emergency purposes only on Friday, November 15th and our Walk-in Offices will be closed on Friday, November 15th. Normal business hours will resume on Monday, November 18th. Access to Online Customer Care services will be unavailable during this system maintenance.
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Emergency?
Montana (888) 467-2669
South Dakota / Nebraska (800) 245-6977

Customer Service

Residential or Business Customer Service, weekdays 7 am - 6 pm

Montana
(888) 467-2669
South Dakota / Nebraska
(800) 245-6977

Bill Payment Address

NorthWestern Energy
11 E. Park St.
Butte, MT 59701-1711

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Please do not use this form to report emergencies.

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