IFRS S2 Climate Disclosures
IFRS S2 is the ISSB's climate-specific standard — setting requirements for climate-related risks and opportunities disclosure. It is the global successor to TCFD recommendations and is now mandatory in the UK, Australia, Japan, Singapore, Brazil, and 30+ other jurisdictions. For companies operating across multiple markets, S2 and ESRS E1 must be reconciled.
IFRS S2 is the ISSB's climate-specific standard — setting requirements for climate-related risks and opportunities disclosure. IFRS S2 follows the TCFD four-pillar structure applied specifically to climate:.
What IFRS S2 requires
IFRS S2 follows the TCFD four-pillar structure applied specifically to climate:
Governance: Board oversight of climate risks and opportunities; management roles and responsibilities; how climate expertise is maintained at governance level.
Strategy: Climate-related risks and opportunities identified across short, medium, and long-term horizons; how these affect business model and strategy; financial effects of climate risks and opportunities; climate resilience of strategy tested through scenario analysis.
Risk management: Processes for identifying, assessing, and managing climate risks; integration of climate risk into overall enterprise risk management.
Metrics and targets: Scope 1, 2, and 3 GHG emissions (mandatory); cross-industry metric categories (transition risks, physical risks, climate opportunities); industry-based metrics from SASB standards; GHG emission reduction targets.
The most significant S2 requirement beyond basic TCFD is the mandatory Scope 1, 2, and 3 GHG disclosure — TCFD recommended this but did not mandate it. IFRS S2 makes all three scopes mandatory.
IFRS S2 and ESRS E1 — the interoperability map
Companies subject to both CSRD (ESRS E1) and IFRS S2 — typically EU-headquartered companies with listed securities in ISSB-adopting jurisdictions, or non-EU companies with EU operations — can produce a combined climate disclosure.
The ISSB and EFRAG published joint interoperability guidance in 2023 showing where ESRS E1 disclosures satisfy IFRS S2 requirements and vice versa.
Key overlaps: Scope 1, 2, and 3 GHG emissions (E1-6 = S2 Appendix B); climate targets (E1-4 = S2 paragraph 34); transition plan (E1-1 = S2 paragraph 14); scenario analysis (E1-2/E1-3 = S2 paragraphs 22–25).
Key differences: ESRS E1 adds impact materiality — how the company affects the climate — which S2 does not require. ESRS E1 adds XBRL tagging and mandatory third-party assurance. IFRS S2 adds industry-specific SASB metrics which ESRS E1 does not mandate.
For dual reporters: prepare ESRS E1 first (broader scope) and extract IFRS S2 from it. Approximately 75% of ESRS E1 content satisfies IFRS S2 — the additional 25% for S2 is primarily the SASB industry metrics and any S2-specific formatting requirements.
Scenario analysis under IFRS S2
IFRS S2 requires climate-related scenario analysis to assess the resilience of the entity's strategy under different climate futures. This is one of the most technically demanding requirements.
Minimum scenarios: IFRS S2 requires at least two scenarios — one consistent with limiting warming to 1.5°C (or 2°C at most) and at least one higher warming scenario. In practice, companies typically use NGFS Net Zero 2050 (1.5°C) and NGFS Hothouse World (3°C+) or equivalent.
Scenario analysis approach: physical risks must be assessed under at least one scenario with significant physical climate impacts. Transition risks must be assessed under at least one scenario consistent with the Paris Agreement. The analysis must be forward-looking — covering short (0–5 year), medium (5–20 year), and long-term (20+ year) horizons.
Materiality of scenario analysis: unlike ESRS E1-9 which requires quantification of financial effects, IFRS S2 allows qualitative scenario analysis for companies where quantification is not feasible. However, leading practice — and investor expectation — is moving toward quantitative financial effect disclosure.
For companies that have completed ESRS E1 scenario analysis: the same scenarios, methodology, and financial effect disclosures satisfy IFRS S2. Avoid running separate scenario analyses for each framework — the underlying climate science and business exposure is identical.
Frequently asked questions
Is IFRS S2 mandatory in the EU?
No — the EU has CSRD/ESRS E1 as its mandatory climate disclosure framework. IFRS S2 is not adopted in the EU as a mandatory standard. EU companies subject to CSRD report under ESRS E1. IFRS S2 applies to EU companies only if they have listed securities in ISSB-adopting jurisdictions (UK, Australia etc.) that mandate S2 separately.
What are the SASB industry-based metrics in IFRS S2?
IFRS S2 requires companies to disclose industry-specific metrics using SASB standards for their sector — metrics that are particularly relevant for understanding climate risks and opportunities in that industry. For example, the SASB Oil & Gas standard includes metrics on GHG emissions intensity, methane emissions, and water management. SASB metrics are disclosed as a supplement to the cross-industry metrics.
How does IFRS S2 define short, medium, and long term?
IFRS S2 does not prescribe specific time horizons — entities define their own short, medium, and long-term horizons based on their business planning cycles, asset lives, and the timeframe of their strategic plans. Typical practice: short-term = 0–3 years, medium-term = 3–10 years, long-term = beyond 10 years. Disclose the horizons used and the rationale.