This brief explores the reasons why students may not fill out a FAFSA and reasons why students may think they are ineligible to do so. Among the findings, 65% of students who were in 9th grade as of fall 2009 reported they completed the FAFSA. Of the remaining students, 24% did not complete the FAFSA, 3% did not know what the FAFSA was, and 8% did not know if they or their parents completed the FAFSA.