Since the revision of Individuals With Disabilities Education Act (IDEA) in 2004, experts and service providers have been operating on the untested assumption that State Performance Plan Indicator 13 (transition Individualized Education Program [IEP] compliance) is a precursor to Indicator 14 (student outcomes of engagement in postsecondary education, training, and employment). This study analyzed the relationship between Indicator 13 and Indicator 14 through bivariate linear regression. The sample included student-level secondary transition data from 352 local education agencies (LEAs) in Missouri. A total of 2,123 IEP files were reviewed using a validated checklist for compliance to the IDEA transition requirements, known as Indicator 13. Indicator 14 was measured via survey responses from 4,994 high school graduates with IEPs. Results revealed statistically significant linear relationships between LEAs' Indicator 13 compliance data and the percentage of graduates with IEPs who completed a semester of college or a career training program. Findings suggest that alternate approaches and indicators may be needed to improve postsecondary outcomes for students with and without IEPs.