A motivational orientation intervention designed to improve parenting program retention was field tested versus standard orientation across two parenting programs, Parent-Child Interaction Therapy (PCIT) and a standard didactic parent training group. Both interventions were implemented within a frontline child welfare parenting center by center staff. Participants had an average of six prior child welfare referrals, primarily for neglect. A double-randomized design was used to test main and interaction effects. The motivational intervention improved retention only when combined with PCIT (cumulative survival = 85% vs. around 61% for the three other design cells). Benefits were robust across demographic characteristics and participation barriers but were concentrated among participants whose initial level of motivation was low to moderate. There were negative effects for participants with relatively high initial motivation. The findings suggest that using a motivational intervention combined with PCIT can improve retention when used selectively with relatively low to moderately motivated child welfare clients.