We have partnered with Speedpay, an ACI Worldwide company, to give you the option to pay by credit card, debit card or electronic funds transfer from your savings or checking account.
Speedpay accepts VISA®, MasterCard®, Discover® and American Express® credit cards or debit cards bearing the STAR®, NYCE®, PULSE® or ACCEL® logo.
To pay via internet:
Use your Alliant Energy account number to log in to the online Speedpay system.
To pay over the phone:
Call 1-877-429-4126, and follow the voice instructions.
Speedpay charges a convenience fee for each transaction to cover processing and transaction costs associated with handling credit card, debit card or electronic funds transfer payments. The handling of these fees varies by state. Customers in Iowa will be charged convenience fees as follows:
- $2.99 per $600 transaction for residential customers
- $11.50 per $2,000 transaction for business customers*
* Not all business customers may be eligible. Please contact your Key Account Manager for eligibility requirements.
Before you make a Speedpay payment, please note:
The Speedpay option is available for a one-time use or recurring payments.
Speedpay payments are posted to your account within three business days. If you are paying due to a disconnect notice, call our Customer Service Center at 1-800-ALLIANT (800-255-4268) with your Speedpay confirmation number so we can note it on your account.
Speedpay charges a convenience fee for each transaction to cover the costs of processing credit card, debit card and electronic funds transfer payments. The handling of these fees varies by state. Customers in Iowa will be charged convenience fees.
Speedpay 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 Speedpay in any consecutive five-day period and a maximum of five payments in any consecutive 30-day period.