Chapter 5 on Admissibility delves into the factors determining whether a climate case can be heard in court. It presents a clear understanding of the criteria for admissibility and their potential implications on the trajectory of climate litigation. The chapter also delves into the interplay between domestic and international legal rules and norms and their influence on the criteria for admissibility. The author’s analysis reveals that a restrictive interpretation of admissibility criteria can present formidable access to justice barriers, particularly for those most impacted by climate change. In light of these challenges, the author’s distillation of emerging best practice highlights instances where courts and quasi-judicial bodies have interpreted admissibility criteria to ensure access to justice. Specifically, the chapter highlights cases where these bodies have considered human rights and justice imperatives in their admissibility decisions. These decisions highlight the potential for an inclusive and equitable approach to climate litigation, one that aligns with the global nature of the climate crisis and the urgent need for climate justice.