Internet-delivered, therapist-guided, self-help programs are novel ways to deliver psychotherapeutic interventions adapted from established therapy models. Such programs can be easily accessed online and may offer an important treatment option for patients who struggle with barriers to seeking out and engaging in face-to-face psychotherapy, including depressed adolescents. While there are evidence-based Internet-delivered self-help programs based on cognitive-behavioral therapies (i.e. ICBT) for adolescent depression, a program based on psychodynamic principles (i.e. IPDT) has so far been lacking. In this article we describe the IPDT program developed within the ERiCA project, which has so far been evaluated in two randomized controlled trials (RCTs). We further provide a case example from one of the trials to illustrate the treatment process and therapeutic interaction in detail. Given the novelty of the approach, we will particularly highlight and discuss how a psychodynamic understanding of adolescent development and depressive dynamics as well as affect-focused treatment principles inform the treatment, including the therapist’s role, tasks, and choice of interventions. The potential implications and utility of IPDT for regular clinical practice are elaborated as well as potential research directions for the future.