Self-report measures are widely used for research and clinical assessment of adults with autism spectrum disorder. However, there has been little research examining the convergence of self- and informant-report in this population. This study examined agreement between 40 pairs of adults with autism spectrum disorder and their caregivers on measures of symptom severity, daily living skills, quality of life, and unmet service needs. In addition, this study examined the predictive value of each reporter for objective independent living and employment outcomes. Caregiver and self-report scores were significantly positively correlated on all measures (all r's >0.50). Results indicated that there were significant differences between reporter ratings of daily living skills, quality of life, and unmet service needs, but no significant differences between ratings of symptom severity. Combining caregiver-report and self-report measures provided significantly higher predictive value of objective outcomes than measures from a single reporter. These findings indicate that both informants provide valuable information and adults with autism spectrum disorder should be included in reporting on their own symptoms and experiences. Given that two reporters together were more predictive of objective outcomes; however, a multi-informant assessment may be the most comprehensive approach for evaluating current functioning and identifying service needs in this population.