Sustainability reporting frameworks: global landscape and UK position

Framework landscape overview

The sustainability reporting landscape has consolidated around several major frameworks, each serving different regulatory jurisdictions and stakeholder needs 9. IFRS S1 and S2 provide the global baseline for investor-focused sustainability disclosure, while regional frameworks like EU CSRD mandate broader stakeholder reporting 26.

Voluntary frameworks like GRI and SASB continue to influence corporate reporting, particularly for companies not yet subject to mandatory regimes 51. The emergence of mandatory frameworks has created a multi-tier system where companies may need to comply with multiple frameworks depending on their operations and listing jurisdictions.

Framework convergence is occurring through common methodological foundations — most climate disclosures reference TCFD recommendations and GHG Protocol accounting — but materiality approaches and disclosure scope remain significantly different 4. This creates complexity for multinational companies operating across multiple regulatory environments.

IFRS S1 & S2: the global baseline

IFRS S1 General Requirements and IFRS S2 Climate-related Disclosures, effective from 2024, establish the global baseline for sustainability reporting by securities regulators 9. Published by the International Sustainability Standards Board (ISSB), they focus on financially material sustainability risks and opportunities that affect enterprise value.

IFRS S1 sets general requirements including governance, strategy, risk management, and metrics and targets across all sustainability topics 9. IFRS S2 provides specific climate requirements building on TCFD recommendations, covering transition and physical risks, climate-related opportunities, and scenario analysis methodologies.

The IFRS approach emphasizes investor decision-usefulness through financial materiality assessment, requiring disclosure only of sustainability matters that create risks or opportunities affecting cash flows, access to finance, or cost of capital 9. This investor focus distinguishes IFRS from stakeholder-oriented frameworks like GRI.

EU CSRD: regional mandatory framework

The EU Corporate Sustainability Reporting Directive (CSRD), effective from 2024, mandates sustainability reporting for large EU companies and EU subsidiaries of non-EU multinationals 26. CSRD uses European Sustainability Reporting Standards (ESRS) developed by EFRAG, taking a broader stakeholder approach than IFRS.

CSRD's defining feature is double materiality assessment, requiring disclosure of sustainability topics that either affect the company financially OR where the company significantly impacts external stakeholders 26. This captures both investor-relevant risks and broader corporate responsibility considerations.

ESRS covers environmental, social, and governance topics with detailed disclosure requirements across 12 standards, from climate change and circular economy to workforce conditions and business conduct 26. The comprehensive scope reflects the EU's stakeholder capitalism approach to corporate governance.

GRI and SASB: voluntary global standards

Global Reporting Initiative (GRI) Standards remain the world's most widely used voluntary sustainability reporting framework, adopted by thousands of companies globally 51. GRI focuses on impact materiality — how companies affect the economy, environment, and society — supporting stakeholder decision-making beyond investors.

GRI's modular structure includes Universal Standards (foundation, general disclosures, management approach) plus topic-specific standards covering economic, environmental, and social impacts 51. The framework emphasizes comprehensive stakeholder engagement and impact assessment rather than financial materiality.

Sustainability Accounting Standards Board (SASB) Standards take a different approach, focusing on industry-specific financially material sustainability topics for investor decision-making 52. SASB identifies the 3-5 sustainability topics most likely to affect financial performance in each of 77 industries.

SASB's financial materiality approach aligns with IFRS sustainability standards, making it complementary to mandatory investor-focused frameworks 52. Many companies use SASB for topic identification while applying IFRS or local frameworks for disclosure structure.

Framework comparison analysis

Framework differences center on three key dimensions: materiality approach (financial vs impact vs double), stakeholder focus (investor vs multi-stakeholder), and disclosure scope (targeted vs comprehensive) 9. These choices reflect different philosophies about corporate reporting purposes.

Financial materiality frameworks (IFRS, SASB, UK SRS) prioritize information affecting investment decisions, typically resulting in narrower disclosure focused on enterprise value drivers 9. Impact materiality frameworks (GRI) emphasize corporate accountability to broader stakeholders regardless of financial effects.

Double materiality frameworks (EU CSRD) attempt to bridge these approaches by requiring disclosure on both dimensions, creating broader reporting scope but also higher compliance burden 26. This philosophical split reflects different views on corporate purpose and stakeholder primacy.

UK position in the global landscape

UK SRS positions the UK within the IFRS-aligned camp alongside jurisdictions like Canada, Japan, and Singapore that have adopted or referenced IFRS sustainability standards 4. This creates consistency with global capital markets while diverging from the EU's stakeholder-oriented approach.

The UK's financial materiality choice reflects its capital markets-oriented regulatory philosophy, prioritizing investor protection and market efficiency over broader stakeholder reporting 4. This aligns with the UK's position as a global financial center seeking to maintain competitiveness in sustainability finance.

However, UK companies with significant EU operations face dual compliance requirements, needing to conduct double materiality assessments for CSRD while applying financial materiality for UK SRS 4. This creates implementation complexity but also potential synergies through integrated reporting approaches.

• UK SRS follows IFRS S1/S2 financial materiality approach, aligning with global investor-focused standards
• EU CSRD requires double materiality for UK companies with EU subsidiaries above CSRD thresholds
• Voluntary frameworks like GRI remain relevant for stakeholder communication beyond mandatory requirements
• SASB provides industry-specific guidance complementing UK SRS general requirements
• Framework convergence occurs through shared methodologies (TCFD, GHG Protocol) despite different scopes
• Multinational UK companies need integrated strategies addressing multiple framework requirements

The UK's framework choice reflects broader post-Brexit regulatory strategy, maintaining alignment with global standards while asserting regulatory autonomy from EU approaches 4. This positions UK markets competitively for sustainability finance while requiring companies to navigate an increasingly complex global reporting landscape.