ISSB vs GRI
ISSB and GRI are the two most influential sustainability disclosure frameworks globally — but they serve fundamentally different purposes. ISSB is investor-focused and uses financial materiality. GRI is stakeholder-focused and uses impact materiality. Understanding the difference determines which framework — or combination — is right for your organisation.
ISSB and GRI are the two most influential sustainability disclosure frameworks globally — but they serve fundamentally different purposes. The difference between ISSB and GRI reduces to a single question: who is the primary audience for the disclosure?.
The materiality divide — one concept, two perspectives
The difference between ISSB and GRI reduces to a single question: who is the primary audience for the disclosure?
ISSB is designed for investors and capital providers who need to understand how sustainability issues affect a company's financial condition, performance, and prospects. The ISSB asks: does this sustainability topic affect the company's ability to generate cash flows? If yes, it is material and must be disclosed. If no financial impact, no disclosure is required — regardless of the severity of the company's impact on society or the environment.
GRI is designed for all stakeholders — employees, communities, NGOs, governments, customers, and investors. The GRI asks: does this topic involve significant impacts on the economy, environment, or people? If yes, it is material and must be disclosed — regardless of whether those impacts have financial consequences for the company.
The practical implication: a mining company that causes severe water contamination in a local community has a GRI-material topic (significant negative impact on people) even if the company faces no financial penalty, no legal action, and no reputational damage. Under ISSB, this is only material if the contamination creates a financial risk — litigation, regulatory action, or reputation-driven revenue loss.
Where ISSB and GRI overlap — the intersection zone
Despite different materiality frameworks, ISSB and GRI overlap significantly in practice because most significant corporate sustainability impacts eventually have financial consequences.
Climate change: Almost universally material under both frameworks. Climate physical and transition risks affect financial performance (ISSB materiality) AND companies contribute to climate change through GHG emissions (GRI impact materiality). Both frameworks require GHG emission disclosure — the metrics are largely aligned.
Labour practices: Major labour violations (child labour, forced labour, safety incidents) affect financial performance through regulatory penalties, reputational damage, and supply chain disruption — ISSB material. They also involve significant harm to people — GRI material. Both frameworks require workforce disclosure.
Governance: Anti-corruption, board composition, and business conduct affect investor trust and financial performance — ISSB material. They also involve broader accountability to society — GRI material. Both require governance disclosure.
The divergence zone: biodiversity loss, community impacts, and product end-of-life waste — these have significant impacts on the world (GRI material) but may have little near-term financial consequence for many companies (ISSB not material). This is where GRI requires disclosure and ISSB does not.
Using ISSB and GRI together — the comprehensive approach
Approximately 40% of large global companies use both ISSB-aligned and GRI frameworks simultaneously — recognising that investor-focused and stakeholder-focused disclosure serve complementary purposes.
The combined approach: use GRI for comprehensive impact disclosure to all stakeholders; use ISSB/SASB for investor-grade financial materiality disclosure; identify the overlap (approximately 60–70% of disclosures) and collect data once for both.
For CSRD companies: ESRS effectively combines both frameworks — double materiality covers both financial materiality (ISSB) and impact materiality (GRI) simultaneously. A fully compliant ESRS disclosure largely satisfies both ISSB and GRI requirements. Preparing ESRS first, then mapping to GRI and ISSB, is the most efficient approach for companies subject to CSRD.
The GRI-ISSB interoperability note: GRI and ISSB published a joint statement in 2023 clarifying that the two frameworks are complementary and not competing. GRI provides the impact dimension; ISSB provides the financial dimension. Together they constitute comprehensive sustainability disclosure. The joint statement explicitly endorses using both frameworks for companies seeking full-spectrum disclosure.
Frequently asked questions
Which framework do ESG rating agencies prefer?
Different agencies weight differently. MSCI ESG Ratings and Sustainalytics use financially material metrics aligned with ISSB/SASB. CDP and UN PRI use broader stakeholder-focused metrics aligned with GRI. For maximum ESG rating coverage, reporting under both frameworks provides the broadest data for rating agency analysis.
If we already report GRI, how much additional effort is ISSB?
Moderate — approximately 30–40% additional effort. GRI covers the impact side comprehensively but lacks the financial quantification of climate risks and opportunities (IFRS S2 specific), the SASB industry metrics, and the scenario analysis required by ISSB. Scope 1 and 2 GHG data is typically already available from GRI 305 reporting.
Does the ISSB plan to incorporate impact materiality in future?
The ISSB has explicitly stated it will not adopt double materiality — it is intentionally focused on investor needs and financial materiality. The ISSB and GRI frameworks are designed to coexist, with CSRD/ESRS serving as the bridge for jurisdictions that want both perspectives in a single mandatory framework.