Globally, ex-post legislative evaluations are becoming increasingly important for understanding how laws function in practice and identifying their limitations and their effects upon stakeholders. This study delves into the impact of ex-post legislative evaluations within the Dutch healthcare system. Building upon insights from previous literature, we aim to refine existing ideas within the field through empirical data. Utilising the realist evaluation method, we examine three distinct case studies followed by a cross-case analysis. Our research underscores that the impact of these evaluations extends beyond policy and politics to the broader societal arena. Our findings also point towards opportunities for strengthening the impact of ex-post legislative evaluations within this broader societal arena. Specifically, we identify strategic phases within the evaluation process through which we aim to maximise impact. Finally, the study emphasises the importance of context awareness, the strategic utilisation of research quality as well as interactional factors for enhancing impact.