The Graduate School sets limits for the expected time to degree for each degree level:
Doctoral Candidates 
Master's Candidates

There are some circumstances in which students need to extend beyond these time-to-degree limits. Whenever a student approaches the time-to-degree limit, the Graduate School will initiate an extension petition process. Petitions for extensions will be sent to eligible doctoral students in the last semester of their eighth year of study. These completed petitions must be returned to the Graduate School by the date specified on the petition. Students no longer eligible for additional extensions will receive a letter stating that they must finish their degree by the close of the summer term

The tuition charges for any semesters of enrollment beyond the time-to-degree limits will depend on the student’s residency status. In most cases, doctoral students on extension will be enrolled in continuation status and charged the corresponding tuition, and master’s students will be enrolled in extended master’s status. Students will also be expected to enroll in or waive the student health insurance plan with their extended enrollment.