This study assessed the value of a specific set of client variables in predicting treatment retention and completion of a rehabilitation program for homeless veterans. Participants were 596 (22 female) military veterans admitted to the Palo Alto, California Veterans Administration domicilary program between 1992 and 1995. Information was collected on a number of demographic and background characteristics previously used to predict treatment retention and outcomes. Results indicated that clients who were younger, female, and currently diagnosed with a depressive disorder, showed the highest rates of treatment retention and completion, whereas a current personality disorder diagnosis or history of psychiatric treatment was related to poorer rates of retention and completion. These results may be informative for identifying ways to modify this and other similar treatments to apply to a larger client population. The study's limitations were noted.