A number of research studies support self-practice/self-reflection (SP/SR) as an experiential learning process that facilitates the acquisition of therapeutic skill in a number of cognitive-behavioural therapy (CBT) competencies and as showing potential as a valuable professional development activity. Engaging therapists to participate in SP/SR programmes is sometimes difficult, and when they are offered the option to participate in SP/SR programmes as part of professional development, relatively few volunteer. This study investigates the role of therapist beliefs about SP/SR as a potential obstacle to engagement. An online survey was developed to assess the strength of 14 commonly held therapist beliefs concerning the consequences of participating voluntarily in a SP/SR programme. Participants were a combined sample of 44 Psychological Wellbeing Practitioners and high-intensity CBT therapists employed by an Improving Access to Psychological Therapies service in the United Kingdom. Few negative beliefs about SP/SR emerged. The majority of respondents believed SP/SR programmes were relevant to their work situation, but perceived “lack of time” as a significant barrier to participation. Three factors are considered in relation to introducing SP/SR as a workforce professional development activity: (a) The importance of managing therapist perceptions regarding time; (b) SP/SR as a mechanism to increase self-care and reduce burnout; and (c) The need to focus mental health services' attention on the potential of SP/SR programmes to increase staff morale and improve service delivery.