The International Sustainability Standards Board’s IFRS S1 (general sustainability disclosures) and S2 (climate-related disclosures) are the global baseline for sustainability reporting, absorbing the earlier TCFD framework. Adopted or being adopted by regulators across dozens of jurisdictions, they define what a company must disclose about climate risk, transition plans and emissions — and, like every framework in this space, they specify content rather than an interchange format.
ISSB IFRS S1 / S2
IFRS S1 and S2, published by the International Sustainability Standards Board, are the global baseline for sustainability reporting. S1 covers general sustainability-related disclosures, S2 covers climate specifically, and together they absorbed the earlier TCFD framework — which means the ISSB now occupies the position that a decade of voluntary climate reporting was heading toward.
- S1 general, S2 climate - S2 is where the emissions, transition plan and scenario analysis requirements live.
- TCFD absorbed - The four TCFD pillars survive inside S2, so existing reporters have a path in.
- Financial materiality - The investor’s lens, in deliberate contrast to GRI’s impact materiality.
- Adopted jurisdiction by jurisdiction - Regulators across dozens of countries are adopting or endorsing it, which is what turns a framework into a requirement.
Like every framework in this space, S1 and S2 specify content rather than an interchange format. The IFRS Foundation does publish a digital taxonomy, and where a jurisdiction requires tagged filings the machine-readable layer arrives as XBRL. The pattern across the whole climate stack is consistent: rich semantics, thin serialisation, and the only genuinely machine-readable artifact is imposed by a securities regulator rather than by the standard-setter.
Industry: Finance
