Make a Payment on an Existing Invoice

Important Information

You must have your ICI customer account number to proceed.

If you do not have your ICI customer account number, call 217-558-2200 Ext. 7024 and your credit card payment will be taken over the phone by one of our staff employees using our virtual terminal payment method.

Although your invoice number is not required, it is extremely helpful in order to ensure your credit card payment is credited to the correct customer account.

NOTE: Once you click on “Proceed with Payment” you will be re-directed to the Illinois ePAY secure website hosted by the Illinois State Treasurer.

We accept


Master Card is a registered trademark of MasterCard Inc. 2000 purchase street, Purchase, New York 10577. Visa is a registered trademark of Visa Inc. P.O. box 8999 San Francisco, CA 94128-8999. Discover is a registered trademark of Discover Financial Services Inc. 2500 Lake Cook Road, River woods, IL 60015. Illinois ePAY is a registered copyright logo of the Illinois State Treasurer 2012.