ABSTRACT Emerging evidence supports a phased approach to trauma treatment, including manualised group-based interventions, to facilitate symptom reduction resulting from complex trauma sequelae. This study investigates the efficacy of Survive and Thrive, a 10-week group psychoeducational course for adult survivors of interpersonal trauma. Between August 2019 and February 2022, participants were enrolled on the course. The Clinical Outcomes in Routine Evaluation—Outcome Measure (CORE-OM) and Difficulties in Emotion Regulation Scale—Short Form (DERS-SF) were administered pre-intervention and immediately post-intervention. In addition, thematic analysis was applied to qualitative feedback. Results revealed significant reductions in CORE-OM and DERS-SF scores post-intervention, with minimal variability in scores attributed to group delivery (either face-to-face or online). The thematic analysis demonstrated that normalising trauma symptoms and providing coping skills positively impacted participants’ experiences. At the same time, the breadth and nature of the content were observed to be an occasional barrier to engagement. In summary, this study proposes that group-based psychoeducational interventions are generally effective for those with mild-to-moderate symptoms of complex trauma. However, further evidence is needed to offer more nuanced recommendations for identifying individuals who may benefit the most from these interventions.