Rapid industrialisation in Southeast Asia, a region with a population of almost 680 million people (ASEAN, 2024), has led to significant social and environmental challenges, including climate change impacts, poor air quality, and waste management. It is estimated that 230 million people (ASEAN, 2025) in the region are living in vulnerable coastal areas and the ASEAN Member States (AMS) are committed to meet the daunting challenges of transitioning to low-carbon economies while building strong, inclusive growth that reduces poverty against the backdrop of recent global challenges and climate ambition shifts. The ASEAN Taxonomy Board (ATB) was established in March 2021 to develop, maintain, and promote an ASEAN Taxonomy that is credible yet inclusive as a means of classifying sustainable economic activities to help drive ASEAN’s sustainability agenda.