The Assertive Community Treatment (ACT) model for people with severe mental illness has typically been viewed as a time-unlimited intervention. Without a proscribed service duration, discharge from ACT largely depends on individual clients' situations and practitioners' discretion. We conducted semi-structured focus groups and interviews with practitioners to explore their discharge practices and considerations. Results highlight the heterogeneity of the clientele served in ACT, and therefore the importance of individualized treatment and discharge planning, guidance on assessing the timing of discharge for individual cases, practice strategies that balance independence and social connectedness to promote recovery, and the need for substantial system reform to facilitate transition after discharge.