montana-dakota.com or via MDU Online Account Services.
Montana-Dakota Utilities Co. (MDU) delivers electricity and natural gas to more than 400,000 customers across 168,000 square miles in Montana, North Dakota, South Dakota, and Wyoming (including Billings, Bismarck, Rapid City, Sheridan, Dickinson, and Williston).
Whether you need to log in to your MDU Online Account Services portal, submit an immediate one-time guest payment via Paymentus, enroll in AutoPay or Balanced Billing to equalize harsh winter heating spikes, track hourly smart meter kilowatt and therm usage, report a power outage or gas emergency, or apply for energy grants, this comprehensive guide covers every billing method and 24/7 utility contact.
MDU Payment Options & Fee Breakdown
Compare available payment options, fees, and posting speeds:
| Payment Channel | Convenience Fee | Posting Speed |
|---|---|---|
| MDU Online Account (Bank ACH) | $0.00 (Free) | Same-Day Posting |
| AutoPay (Automatic Bank Draft) | $0.00 (Free) | On Due Date |
| Paymentus Guest Pay (Card / Wallet) | $1.75 residential fee | Immediate Credit |
| Automated Phone System (Paymentus) | $1.75 fee / Free ACH | Instant Confirmation |
| Authorized In-Person Pay Stations | $1.50 retailer fee | Within 24 Hours |
How to Pay Your MDU Bill Online (Step-by-Step)
Method 1: Pay via MDU Online Account Services
- Navigate to: montana-dakota.com/oas.
- Enter your User ID and Password and click “Log In”.
- From your account summary, click “Pay Bill”.
- Enter checking account routing number and bank account number.
- Submit payment for zero-fee same-day processing.
Method 2: One-Time Guest Payment (Paymentus)
- Visit MDU Payment Options.
- Click “Pay as Guest”.
- Enter your 11-digit MDU Account Number and Billing ZIP Code.
- Enter Debit/Credit card (Visa, MasterCard, Discover, Amex) details.
- Confirm the $1.75 fee and submit your payment.
Alternative Payment Channels
- AutoPay Setup: Automatically pay your monthly statement directly from your checking account on your due date with zero transaction fees.
- Balanced Billing: Eliminate harsh winter heating bill spikes with equalized 12-month installments.
- Pay by Phone: Call MDU automated telephone banking 24/7 at 1-800-638-3278 (1-800-MDU-FAST).
- Pay by Mail: Send payment check with bill coupon to:
Montana-Dakota Utilities Co.
P.O. Box 740774
Cincinnati, OH 45274-0774 - Authorized Pay Stations: Pay cash at Western Union agents, grocery stores, and local banks across MT, ND, SD, and WY.
Power Outage & Gas Emergency Notice
Montana-Dakota Utilities Customer Service Directory
- Customer Support Hotline: 1-800-638-3278 (Mon–Fri 7:30 AM – 5:00 PM MT)
- 24/7 Outage & Gas Emergency: 1-800-638-3278
- Hearing Impaired (TTY): 711
- Official Utility Portal: montana-dakota.com
- Corporate Headquarters: 400 N. Fourth Street, Bismarck, ND 58501
Frequently Asked Questions (FAQ)
What is my MDU Account Number?
Your MDU account number is an 11-digit number located at the top-right corner of your monthly billing statement.
How do I apply for utility assistance in the Northern Plains?
Eligible households can apply for the Low-Income Home Energy Assistance Program (LIHEAP) through their respective state Department of Human Services or apply for MDU’s Energy Share emergency energy grants.
Related Regional Utility Guides:
Disclaimer: BillPayment.guide is an independent energy utility guide and is not affiliated with, endorsed by, or operated by Montana-Dakota Utilities Co. or MDU Resources Group, Inc. All trademarks belong to MDU.
Anisur Rahman brings over 17 years of experience at the intersection of complex technology and digital strategy to BillPayment.guide. Active in the digital space since 2009, Anisur uses his deep industry insights to break down financial technologies, secure online payment methods, and digital platforms. His actionable guides help readers navigate the fast-paced digital economy and manage their online transactions with confidence.
