This publication reflects the ISSB’s commitment to supporting the implementation of its standards, ensuring companies can prepare high-quality disclosures while providing investors with meaningful, decision-useful information.

During the development of IFRS S1 (General Requirements for Disclosure of Sustainability-related Financial Information) and IFRS S2 (Climate-related Disclosures), investors highlighted the urgent need for climate-related data, while some stakeholders raised concerns about data availability and corporate readiness for broader sustainability reporting.

To address these challenges, the ISSB introduced transition reliefs, including the ‘climate-first’ transition relief— the focus of this guide. When reporting only climate-related information under ISSB Standards, companies must still apply the relevant requirements of IFRS S1.