We developed the Counsellor Personal Wellness and Professional Wellbeing (CPW) assessment based on the integration of the Well-Being theory and the Indivisible Self Model of Wellness (IS-WEL). Our participants included 326 counsellors, counsellor educators, and counsellors-in-training in the United States. The participants primarily identified as White (77%), women (80%), and with a doctoral degree (42%). Based on our results, the CPW can be used as a self-assessment or an administered assessment among counselling professionals and clinical supervisors. We provide a rationale for developing the C-PW and the instrument development and validation procedure. Implications for counselling professionals and researchers are included.