This longitudinal study applies the behavioral model of health services use (Andersen, 1995) to the prediction of in-home respite utilization within the naturalistic context of ongoing respite services. Participants (N = 74) were family caregivers who provided informal care for a physically and/or cognitively impaired older adult. All participants resided in the Midwest and received in-home respite services managed by an Area Agency on Aging and funded through the National Family Caregiver Support Program. The primary significant predictor of 3-month in-home respite utilization was the caregiving dyad’s past in-home respite usage. Contrary to prior research, demographic predisposing variables (relationship type, household income) and objective need variables (behavioral dysfunction, functional impairment) were not associated with hours of respite use over 3 months, nor was level of caregiver depressive symptoms. Implications of these data for case management, the provision of in-home respite services, and future research are discussed.