If I mailed in a payment to the Processing Center, how long will it take to post?

Depending on where you mail your payment from, it generally takes 4 business days from within the state of Iowa and 7-10 business days from out of state. Your payment may be delayed further if there is not enough information to determine who the payment is for. To avoid this additional delay, please make sure to write the billing account number on your check. The fastest way to make your payment is through MyUI.