Your tuition payment deadline depends on when you register for classes for that semester. You can view the published Tuition and Billing Calendar online.
It is equally important to know that billing statements are available online, and are not mailed. Your billing statement will indicate when your tuition is due. You can authorize others (i.e. parents and spouses) to view and pay your ASU charges through QuickPay. You can find instructions on how to add/update an authorized payer on the Parent Guest Access website.