Payment options

The return envelope we provide is bar-coded for faster delivery, so please do not use this envelope for other correspondence. If you misplace the return envelope, mail your check AND bill stub to:

Wisconsin customers

Alliant Energy
P.O. Box 3062
Cedar Rapids, IA 52406-3062

Iowa customers

Alliant Energy
P.O. Box 3060
Cedar Rapids, IA 52406-3060

Do not send cash or correspondence in the payment envelope. We cannot be held liable for missing cash payments or for not crediting your account record for cash payments sent by mail.

Do not staple anything to the payment stub or check. This allows us to process your check quickly and accurately. Please include your account number with your payment.

Check your amount due, payment history or other account information in My Account.

If you cannot pay your bill in full by the due date, log into My Account to set up a payment arrangement or contact us at 1-800-ALLIANT (800-255-4268).

Not enrolled in My Account? It takes just a few minutes. Click here to enroll.

How does Convenience Pay® work?

Take your bill and cash, check or money order to a participating Western Union® Convenience Pay® agent location. You will receive a transaction receipt once your transaction is complete.

Western Union® Convenience Pay® payments post to your account within two business days. If you received a disconnection notice, call us at 1-800-ALLIANT (800-255-4268) with your Western Union® Convenience Pay® confirmation number so we can note it on your account.

Where is my nearest Convenience Pay® agent outlet?

Agent outlets are conveniently located in many stores. To find one near you, use Western Union’s Convenience Pay® location look-up tool or call them at 1-800-551-8001.

Is there a fee to use this service?

The fee to process a transaction is $1.25. Western Union® Convenience Pay® charges this to cover fees and costs associated with handling payments up to $2,500.

We're part of the ACI network (formerly called Speedpay). If you already pay bills with ACI, you can add us as a biller. Fees apply for Iowa customers.

Note: We don't charge fees for online one-time payment or My Account.

To use ACI over the phone: 
Call 1-877-429-4126 and follow the voice instructions. 

To use ACI online:
Use your Alliant Energy account number to log in to the online ACI system. 

Fees

ACI charges a convenience fee for each transaction. Fees vary by state. Here are the Iowa rates: 

• Residential customers: $2.99 per $600 transaction.

• Business customers: $11.50 per $2,000 transaction for business customers. (Not all business customers are eligible. Call the Business Resource Center at 1-866-ALLIANT (866-255-4268) for eligibility requirements.)

Before you make an ACI payment, please note:

• ACI payments post to your account within three business days. If you received a disconnection notice, call us at 1-800-ALLIANT (800-255-4268) with your ACI confirmation number so we can note it on your account.
• ACI does NOT allow duplicate payment amounts from the same bank account or card number on the same day.
• Customers are limited to no more than three payments via ACI in any consecutive five-day period and a maximum of five payments in any consecutive 30-day period.