Billing Options E-bill Enroll in our free electronic E-bill program. With NorthWestern Energy E-bill, you’ll receive an e-mail notification when your bill is available to review online – 24 hours a day, 7 days a week. It’s fast, convenient, and completely secure. To sign up, just login to your account and submit your information online. Return to account login Start Service Need one time access? Pay bill as a Guest Mobile User? Install Shortcut on Your Phone Select to install an icon on your iPhone.