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.