In short
IFRS S1 and S2 are the ISSB’s global baseline for sustainability and climate disclosure. S2 builds directly on the TCFD recommendations and references the GHG Protocol, so existing TCFD and inventory work maps across rather than starting again.
What it is
The ISSB’s IFRS S1 (general sustainability-related financial disclosures) and IFRS S2 (climate) are the global baseline investors are converging on — built on the TCFD framework and designed to sit alongside financial reporting.
Adoption is moving faster than most forecast: 28 jurisdictions had adopted IFRS S1/S2 as of April 2026, with more planning to; broader counts cite 21+ jurisdictions mandatory and 30+ moving to adopt, together representing over 60% of global GDP (S&P Global; ESGsource; ISSB, 2026). Major markets include Japan, Australia, Singapore, Hong Kong, South Korea, Canada, the UK and Brazil.
What & how we do it
The work, in the order we do it.
- Structure disclosure across governance, strategy, risk management, and metrics and targets
- Run climate scenario analysis for S2
- Connect it to your GHG inventory and financials
- Ready it for assurance
- Map it to your local frameworks
Standards & frameworks
- IFRS S1
- IFRS S2
- Built on TCFD
- Aligned to BRSR, CSRD and CDP
The rules, as they stand
What the regulation actually says.
| Position as at September 2026 | |
|---|---|
| Jurisdictions adopted | 28 as of April 2026, with around 12 more planning toS&P Global, May 2026 |
| Broader count | 21+ jurisdictions mandatory and 30+ moving to adopt — together about 60% of global GDPISSB; ESGsource; KPMG, 2025-26 |
| Major markets | Japan, Australia, Singapore, Hong Kong, South Korea, Canada, the UK and BrazilESGsource, June 2026 |
| United States | Not adopted, though many US multinationals align voluntarilyESGsource, June 2026 |
| Builds on | TCFD; references the GHG Protocol and requires Scope 1, 2 and 3Sustainability Atlas; ISSB, 2026 |
Common questions
S1 covers sustainability-related financial disclosure generally; S2 is the climate-specific standard that sits on top of it and builds directly on the TCFD recommendations.
It depends where you are listed and operate. 28 jurisdictions had adopted as of April 2026 with around a dozen more planning to, and broader counts put 21 or more jurisdictions on a mandatory footing — together representing roughly 60% of global GDP.
Yes, substantially. IFRS S2 builds directly on TCFD, so climate-risk work structured to TCFD maps across into S2 rather than being redone.
It requires Scope 1, 2 and 3, and it references the GHG Protocol — so a GHG-Protocol inventory is the foundation rather than a separate exercise.
The US has not adopted IFRS S1 and S2. Many US multinationals align voluntarily, usually because their investors or their non-US listings ask them to.
BRSR is explicitly designed to align with IFRS S1/S2, alongside GRI, TCFD and CDP — so an Indian filer building for one is building much of the other.
Build to the global baseline.
Tell us which frameworks you already answer to and we will show you how much of S1/S2 you have already built.
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