The formalization of the concept of the Bank’s transition impact has been adjusted steadily to the changing context since it was first formalized in 1997. As the Bank is in the process of reviewing its approach to the expected transition impact methodology, this realist evaluation synthesis aggregates relevant evaluation findings from a broad evidence-based body of evaluation knowledge covering 2017 - when the transition impact concept and operationalization were last reviewed – to 2023. It identifies how some of the most recent work addressed outstanding recommendations from evaluation findings but not other recommendations that warrant attention during the transition impact review.