This interim evaluation report provides findings on the design, implementation and delivery of The Way Back Support Service across 25 Australian sites. The interim report found significant reductions in participant psychological distress and suicidal ideation and significant increases in emotional wellbeing. It will inform ongoing improvements to The Way Back and provide additional evidence on the elements of successful aftercare services. The report is accompanied by a response to the report by Beyond Blue, and our What Does Good Aftercare Look Like? design principles. The final report will be available in December 2022.