Montana-Dakota Utilities (MDU) provides electric and natural gas service to customers across Montana, North Dakota, South Dakota, and Wyoming. Paying your utility bill on time avoids late fees, prevents service interruptions, and supports reliable energy delivery. MDU offers multiple secure and convenient payment methods, including free options through its Online Account Services portal, credit and debit card payments via Paymentus (with a small fee), phone payments, cash at Western Union Convenience Pay locations, automatic bank draft, Balanced Billing, and traditional mail.
- For complete and up-to-date details on every payment method, visit the official Payment Options page at https://www.montana-dakota.com/customer-service/payment-options/.
- To access free ACH payments, enroll in AutoPay, view usage history, or manage your account 24/7, register or log in at the Online Account Services portal: https://customer.montana-dakota.com/.
Pay Online Through Online Account Services (Free ACH)
The easiest and completely free way to pay from your U.S. checking or savings account is through MDU’s secure Online Account Services portal. This option requires a quick one-time registration using your account number and PIN (found on your bill).
Key features after login:
- Make one-time or scheduled payments with free ACH/eCheck
- View current and past bills plus detailed usage history
- Enroll in AutoPay or Balanced Billing
- Switch to paperless (eBill) statements
- Set up payment reminders and manage multiple accounts
How to get started:
- Go to https://customer.montana-dakota.com/
- Click “Register” and enter your 11-digit account number, PIN, and email
- Create a username and password
- Log in and complete your payment
The portal is available 24/7 and provides instant confirmation for most transactions. ACH payments made here are free with no convenience fees from MDU.
Pay with Credit/Debit Cards or Digital Wallets via Paymentus
For credit cards, debit cards, or digital wallets (Apple Pay, Google Pay, PayPal, Venmo, etc.), use the independent Paymentus service.
Paymentus options:
- Online: Visit https://ipn4.paymentus.com/cp/mduu?pt=MDU&brand=MDU
- Phone: Call 833-425-1698 and follow the prompts (have your 11-digit account number ready)
Fee: $1.89 per transaction (charged by Paymentus, not retained by MDU) Processing: Next business day
Accepted cards include Visa, Mastercard, American Express, Discover, and qualifying debit/ATM cards (NYCE, PULSE, STAR networks). This is the fastest method when you need to pay with a card and do not want to use the free ACH portal option.
Pay Montana-Dakota Utilities Bill by Phone
Call the dedicated Paymentus phone line for quick card or eCheck payments.
Phone number: 833-425-1698 (available for payments 24/7 in most cases)
Have your 11-digit account number ready. Follow the automated prompts to complete your payment. A $1.89 convenience fee applies for card transactions. For general account questions or assistance during business hours, call the main Customer Service Center at 800-638-3278 (Monday–Friday, 7:30 a.m. – 6:30 p.m.).
Pay In Person with Cash at Western Union Convenience Pay Locations
MDU accepts cash payments at authorized Western Union Quick Collect / Convenience Pay locations across its service area.
How to pay:
- Bring your most recent bill or your 11-digit account number
- Visit any participating Western Union Convenience Pay location
- Pay with cash (some locations may accept debit cards)
There is typically no fee from MDU for this method, though the location may charge its own small service fee. Find nearby locations using the Western Union locator on the MDU Payment Options page or at westernunion.com. Payments generally post the same or next business day.
Pay by Mail
Mail your check or money order (payable to Montana-Dakota Utilities) along with the payment stub or your 11-digit account number clearly written on the check. Do not send cash.
Mailing address: Montana-Dakota Utilities P.O. Box 5600 Bismarck, ND 58506-5600
Allow 5–7 business days for delivery and processing. Use this address for all mailed payments to ensure accurate and timely crediting. Include a contact phone number in case of questions.
Automatic Payments (AutoPay) and Balanced Billing
Enroll in free AutoPay (automatic bank draft) through the Online Account Services portal at https://customer.montana-dakota.com/. Your bill amount is automatically withdrawn from your checking or savings account on the due date. This is completely free and helps prevent late fees.
MDU also offers Balanced Billing, which averages your previous 11 months of usage plus the current month to create more predictable monthly payments. Enroll online after logging into your account or contact customer service. Both options provide excellent budgeting tools for consistent energy costs.
Important Billing Information
Bills are typically due within 15–21 days of issuance. Late payments may incur fees and risk service disconnection. Contact MDU promptly if you anticipate difficulty paying—payment arrangements or assistance programs may be available. Keep your 11-digit account number handy for all transactions.
Scam Warning: MDU will never ask you to pay via gift cards, wire transfers, or unusual third-party accounts. Always use the official website, verified phone numbers, or authorized locations listed here.
Customer Service and Contact Information
Main Customer Service: 800-638-3278 (Monday–Friday, 7:30 a.m. – 6:30 p.m.) Paymentus Phone Payments: 833-425-1698 Online Account Services: https://customer.montana-dakota.com/ Payment Options Page: https://www.montana-dakota.com/customer-service/payment-options/
Have your account number and recent bill ready when contacting support for faster assistance. Outage reporting and emergency service are also available through the main number or the website.
FAQs
How do I pay my Montana-Dakota Utilities bill online for free? Register or log in at https://customer.montana-dakota.com/ and use the free ACH/eCheck option from your checking or savings account. No convenience fee applies.
What phone number do I call to pay my MDU bill with a credit card? Call 833-425-1698. A $1.89 convenience fee applies per transaction through Paymentus.
Is there a way to pay without creating an online account? Yes. Use Paymentus online at the link above or by phone (833-425-1698) with your 11-digit account number for card payments. Cash is accepted at Western Union Convenience Pay locations.
Where can I pay my Montana-Dakota Utilities bill in person with cash? Visit any authorized Western Union Quick Collect / Convenience Pay location. Bring your bill or account number. Find locations on the MDU Payment Options page.
What is the mailing address for MDU payments? Send checks or money orders to P.O. Box 5600, Bismarck, ND 58506-5600. Include your 11-digit account number.
How do I set up automatic payments for my MDU bill? Log into Online Account Services at https://customer.montana-dakota.com/ and enroll in free AutoPay (bank draft). Balanced Billing is also available for more predictable payments.
Does Montana-Dakota Utilities charge fees for payments? Free ACH payments are available through the online portal. Paymentus card/digital wallet transactions carry a $1.89 fee per transaction. Mail, AutoPay, and Western Union cash options generally have no extra fees from MDU.
How do I find my 11-digit MDU account number? It appears on your monthly bill statement and in the Online Account Services portal after login.
What should I do if I cannot pay on time? Call 800-638-3278 immediately to discuss payment arrangements or assistance programs and avoid late fees or service issues.
Does MDU offer paperless billing? Yes. Enroll in eBill (paperless statements) through the Online Account Services portal after logging in.
