IFRS S1 — General Requirements for Disclosure of Sustainability-related Financial Information
IFRS S1 is the ISSB's foundational sustainability disclosure standard (issued June 2023). India has not adopted ISSB; BRSR remains operative.
Definition
IFRS S1 (“General Requirements for Disclosure of Sustainability-related Financial Information”) is the inaugural sustainability disclosure standard issued by the International Sustainability Standards Board (ISSB) of the IFRS Foundation on 26 June 2023, effective for annual reporting periods beginning on or after 1 January 2024 in jurisdictions that have adopted it.
It is the foundational ISSB standard — establishing how an entity should identify, measure, and disclose sustainability-related risks and opportunities that could reasonably be expected to affect its prospects (cash flows, access to finance, or cost of capital over the short, medium, and long term). It applies to all sustainability topics; IFRS S2 (Climate-related Disclosures) sits on top of IFRS S1 with topic-specific climate requirements.
What IFRS S1 requires
IFRS S1 inherits the four-pillar disclosure architecture of the TCFD framework:
| Pillar | What the entity discloses |
|---|---|
| Governance | The governance processes, controls, and procedures used to monitor sustainability-related risks and opportunities |
| Strategy | The sustainability-related risks and opportunities, their effects on the business model and value chain, and the entity’s strategy and decision-making in response |
| Risk management | The processes used to identify, assess, prioritise, and monitor sustainability-related risks and opportunities |
| Metrics and targets | The performance metrics and targets used, including industry-specific metrics drawn from the SASB Standards |
Disclosures must be connected to the entity’s financial statements (same reporting entity, same reporting period, same accounting policies where relevant) and cover the full value chain — not only the entity’s own operations.
IFRS S1 vs IFRS S2
| Aspect | IFRS S1 | IFRS S2 |
|---|---|---|
| Scope | All sustainability-related risks and opportunities | Climate-related risks and opportunities only |
| Role | Foundational — sets general requirements | Topic-specific — sits on top of IFRS S1 |
| Industry metrics | Drawn from SASB Standards across all topics | Industry-based climate metrics + cross-industry climate metrics (Scope 1, 2, 3 emissions, etc.) |
| When applied alone | Cannot be applied alone — entities applying ISSB standards apply both | Always applied alongside IFRS S1 |
IFRS S1 vs BRSR — India context
The ISSB standards are not currently mandated for Indian listed entities. Convergence between BRSR and ISSB is a live policy topic in India’s reporting landscape rather than an announced implementation plan — SEBI has not published a formal ISSB adoption roadmap. Refer to SEBI circulars and IFRS Foundation announcements for the current position.
| Aspect | IFRS S1 | BRSR |
|---|---|---|
| Issuer | ISSB (IFRS Foundation) | SEBI |
| Materiality lens | Single materiality (financial materiality / enterprise value) — risks and opportunities that affect the entity | Double materiality (impact on the entity and the entity’s impact on people, environment, economy) |
| Architecture | Principles-based, TCFD-aligned | Form-based — specific BRSR Format with Sections A, B, C, and the nine NGRBC principles |
| Assurance | Set by adopting jurisdiction | Reasonable assurance mandated on BRSR Core (phase-in by market-cap rank per SEBI circulars) |
| India applicability | Not currently mandated | Mandatory for Top 1,000 listed entities by market-cap |
Some Indian listed entities — particularly those with significant overseas-investor exposure or operations in jurisdictions that have adopted ISSB (UK, Brazil, Australia, etc.) — prepare voluntary IFRS S1 / S2 disclosures alongside their mandatory BRSR submission. The two frameworks are not redundant: BRSR captures double-materiality stakeholder impact in the SEBI format; IFRS S1 / S2 captures single-materiality enterprise-value disclosures in the ISSB format.
Related terms
- BRSR — India’s mandatory sustainability reporting framework for listed entities
- BRSR Core — the nine attributes within BRSR subject to mandatory reasonable assurance
- Materiality — the threshold for “what counts” in sustainability reporting
- Reasonable Assurance — the assurance level mandated for BRSR Core
- ISAE 3410 — the IAASB standard for GHG-statement assurance, often co-applied with ISSB-aligned reporting