As global organisations move from stated ambition to actual delivery on climate reporting, the conversation is shifting. The question is no longer "What should we disclose?" but "How do we disclose it consistently, credibly and at scale?"
This transition has surfaced practical hurdles, from emissions measurement to jurisdiction-specific constraints, especially as companies begin applying IFRS S2 – Climate-related Disclosures in real reporting cycles.
Recognising these real-world challenges, the International Sustainability Standards Board (ISSB) has issued targeted amendments to IFRS S2, released on 11 December 2025. These refinements are a strategic recalibration to ensure that climate disclosures remain comparable, decision-useful and implementable across markets.
Why These Amendments Matter
IFRS S2 is fast becoming the global benchmark for climate-related reporting, anchoring sustainability information to financial relevance. But early adopters flagged several sticking points, particularly around:
- Scope 3 emissions measurement
- Financed emissions calculations
- Regional regulatory inconsistencies
- Methodological rigidity in GHG accounting
The ISSB has responded with a pragmatic balance:
- Clarity where confusion existed
- Relief where complexity was disproportionate
- Rigour where investors depend on comparability
The Four Most Significant Amendments
1. Clearer Boundaries for Scope 3 Category 15 Emissions
Companies, especially financial institutions, now have explicit permission to restrict Category 15 Scope 3 disclosures solely to financed emissions as defined under IFRS S2. This removes ambiguity and ensures emissions data aligns with investor needs without overwhelming preparers.
2. Flexibility to Use Alternative Industry Classification Systems
While GICS remains accepted, entities can now use other recognised classification systems to break down financed emissions. This allows companies to align disclosures with internal risk taxonomies, follow regional market practices and maintain relevance without sacrificing transparency.
3. Practical Relief Where GHG Protocol Is Not Required Across the Group
In jurisdictions where certain business units must follow a local (non-GHG Protocol) methodology, companies can still apply jurisdictional relief for the entire organisation. This avoids unnecessary dual-method reporting and reduces administrative burden without lowering disclosure quality.
4. Flexibility in Global Warming Potential (GWP) Values
Given that some regions experience regulatory lag or limited access to updated data, companies now have jurisdictional relief from mandatorily using the latest IPCC Assessment Report GWP values. This ensures reporting remains accurate, even where infrastructure constraints persist.
A Step Forward for Global Consistency Without Compromising Rigour
These targeted amendments reflect the ISSB's commitment to grounding sustainability reporting in practicality and precision. They recognise that climate disclosures must serve both the preparer and the investor, achieving credibility without creating implementation fatigue.
As IFRS S2 becomes embedded across jurisdictions, these refinements will help organisations scale their disclosure capabilities, reduce uncertainty and deliver high-quality, useful climate information.
Alignment Beyond IFRS S2
Strengthening Global Consistency in Climate Reporting
The ISSB's targeted amendments to IFRS S2 reinforce alignment across the broader sustainability reporting ecosystem. Alongside the changes to IFRS S2, the ISSB has introduced consequential adjustments to relevant SASB Standards to ensure coherence in the reporting of financed emissions. This proactive alignment reduces fragmentation for preparers and strengthens interoperability across jurisdictions, ultimately supporting more consistent and comparable disclosures.
Effective Date and Transition Pathway
The updated requirements become effective for annual reporting periods beginning on or after 1 January 2027, with early adoption permitted.
This implementation window provides companies with the space to upgrade systems, strengthen controls and refine methodologies while maintaining the global momentum toward unified sustainability reporting.
What the Amendments Mean for Companies and Investors
These updates represent a thoughtful evolution in climate-related disclosure. Organisations can expect:
- Global consistency grounded in practical realities
- Investor-focused information without unnecessary reporting burden
- Standards that can be operationalised
As ISSB Vice-Chair Sue Lloyd emphasised, the objective is to offer "real relief to companies… without significantly affecting the decision-usefulness of information for investors." This balance of clarity, pragmatism and accountability is central to the long-term adoption and credibility of global sustainability reporting.
Preparing for the Road Ahead
For organisations preparing climate disclosures, particularly those navigating financed emissions, diverse jurisdictional requirements or first-time adoption, the amendments offer a timely opportunity to reassess reporting architecture and strengthen data governance before 2027.
The direction is clear: companies must deliver robust, comparable and useful climate information, supported by practical flexibility that eases implementation.
At K&A, we continue to monitor global sustainability reporting frameworks closely, helping organisations transform evolving standards into clear, credible and investor-ready disclosures.
