GRI Standards Explained: A Comprehensive Guide for Australian ESG Reporters

The Global Reporting Initiative (GRI) Standards have been the world’s most widely used sustainability reporting framework for over two decades. For Australian organisations, GRI offers a comprehensive, stakeholder-focused approach to sustainability disclosure that complements mandatory Australian sustainability reporting standards. Whether your organisation is preparing for AASB S1 and S2 mandatory compliance or seeking to enhance voluntary ESG disclosure, understanding GRI is essential.

This guide provides a detailed overview of GRI Standards, their structure, and how they interact with Australia’s mandatory reporting requirements. For a broader ESG strategy context, see our complete ESG guide for Australian businesses.

What Is the Global Reporting Initiative?

The Global Reporting Initiative (GRI) is an independent international standards organisation that has developed the most widely adopted sustainability reporting standards globally. Established in 1997, GRI is governed by a multi-stakeholder model including businesses, investors, civil society organisations, labour groups, and standard-setters. This governance structure ensures GRI standards reflect diverse stakeholder perspectives on material sustainability issues.

GRI operates independently but coordinates with other frameworks including the ISSB (whose AASB S1 and S2 are mandatory in Australia) to ensure compatibility and reduce reporting burden for organisations using multiple standards.

The GRI Standards System

Structure and Organisation

The current GRI Standards system (GRI Universal Standards 2021) comprises three core components:

• GRI 1: Foundation – Sets out the foundational principles and requirements for using GRI Standards
• GRI 2: General Disclosures – Requires disclosure of organisational information (governance, policies, stakeholder engagement, materiality assessment)
• GRI 3: Material Topics – Provides guidance on identifying material topics and corresponding Topic Standards
• GRI Topic Standards (300+ coverage): Specific standards for material topics (climate, water, labour practices, supply chains, etc.)

Universal Standards Coverage

The Universal Standards apply to all organisations and cover foundational sustainability governance and reporting principles. Under Universal Standards, organisations must:

• Explain the sustainability reporting process and scope
• Describe the organisation’s governance and policies
• Define material topics through stakeholder engagement
• Identify and disclose all material topics and impacts

GRI Sector Standards

In addition to Universal Standards, GRI has developed Sector Standards for specific industries, including:

• GRI Sector Standards for Oil & Gas
• GRI Sector Standards for Financial Services
• GRI Sector Standards for Mining & Metals
• GRI Sector Standards for Agriculture, Aquaculture & Fishing
• Additional sector-specific standards under development

For Australian organisations in mining, agriculture, or financial services, sector standards provide targeted guidance on industry-material topics such as biodiversity, indigenous rights, and supply chain labour practices.

Core Disclosure Categories Under GRI

General Disclosures (GRI 2)

GRI 2 requires organisations to disclose foundational information including:

• Organisational details: Legal structure, size, geographic scope
• Governance: Board composition, management structures, governance principles
• Stakeholder engagement: Key stakeholder groups, engagement processes, and frequency
• Workforce information: Employment numbers, gender, turnover, and other workforce demographics
• Policies and practices: Sustainability policies, due diligence processes, grievance mechanisms

Material Topic Disclosures

GRI Topic Standards follow a consistent format requiring organisations to disclose:

• Topic description and context: Why the topic is material to the organisation
• Management approach: Policies, processes, and governance for managing the topic
• Key metrics and targets: Quantitative performance data and progress towards targets
• Assurance and verification: Confirmation of data accuracy and reporting completeness

Commonly Reported Topics for Australian Organisations

• GRI 305: Emissions (Scope 1, 2, 3 emissions)
• GRI 308: Supplier Environmental Assessment
• GRI 401: Employment and Labour Practices
• GRI 403: Occupational Health and Safety
• GRI 404: Training and Education
• GRI 405: Diversity and Equal Opportunity
• GRI 406: Non-discrimination
• GRI 408/409: Child Labour and Forced Labour
• GRI 414: Supplier Social Assessment
• GRI 416: Customer Health and Safety

Materiality in GRI Standards

The GRI Materiality Process

GRI requires organisations to identify and disclose all material topics—those that reflect the organisation’s significant impacts on the economy, environment, and people. The materiality process under GRI includes:

• Understanding the organisation: Identify all potential sustainability topics relevant to the industry and operations
• Stakeholder engagement: Consult with employees, customers, investors, suppliers, and affected communities
• Assessment: Evaluate the significance of each topic based on impact (how the organisation affects people and environment) and financial materiality (impact on financial performance)
• Prioritisation: Determine which topics are most material and require detailed disclosure
• Validation: Confirm materiality assessment through governance review

GRI’s “Double Materiality” Concept

GRI assesses materiality from two dimensions—impact materiality (how the organisation affects people and environment) and financial materiality (how environmental and social factors affect the organisation’s financial performance). This “double materiality” approach is similar to AASB S1 requirements and ensures comprehensive identification of material topics.

GRI vs AASB S1/S2: Understanding the Differences

Focus and Purpose

• GRI: Stakeholder-focused reporting on sustainability impacts and management. Provides comprehensive view of environmental, social, and governance performance
• AASB S1/S2: Investor-focused reporting on how sustainability-related risks and opportunities affect financial performance. Focuses on financial materiality

Coverage

• GRI: Broad coverage across environmental, social, governance, human rights, supply chain, and economic topics. Over 300 Topic Standards
• AASB S1/S2: Focused on sustainability-related financial information. AASB S2 emphasises climate-related impacts; AASB S1 requires disclosure of all material sustainability risks

Mandatory vs Voluntary

• GRI: Voluntary framework. Many organisations report against GRI (especially large, multinational entities) but it is not legally mandated in Australia
• AASB S1/S2: Mandatory for Group 1 entities from FY2025–26, Group 2 from FY2026–27, Group 3 from FY2027–28

Emissions Disclosure

• GRI: GRI 305 requires Scope 1, 2, and (where material) Scope 3 emissions disclosure with intensity metrics
• AASB S2: Requires Scope 1 and Scope 2 mandatory, Scope 3 where material

Integration Strategy

Many Australian organisations report against both GRI and AASB standards by:

• Conducting a single, comprehensive materiality assessment that identifies topics material under both frameworks
• Preparing base data (emissions, workforce metrics, etc.) that meets the highest standard’s requirements
• Structuring the sustainability report to facilitate mapping between GRI and AASB disclosures
• Using supplementary tables to reconcile GRI coverage with AASB-specific disclosures

Implementing GRI Standards in Australia

When to Report Against GRI

Organisations should consider GRI reporting when:

• Not yet subject to mandatory AASB S1/S2 requirements (particularly in Groups 2 and 3)
• Multinational with international stakeholder bases expecting GRI disclosure
• Seeking comprehensive stakeholder engagement and impact disclosure beyond financial materiality
• Operating in sectors covered by GRI Sector Standards
• Committed to transparency and accountability beyond regulatory minimums

GRI Implementation Process

1. Determine scope: Define the organisation, geographic coverage, and reporting period for the GRI report
2. Conduct materiality assessment: Engage stakeholders and assess environmental, social, and governance topics
3. Identify relevant standards: Based on materiality, identify which GRI Topic Standards apply
4. Collect data: Gather data to support disclosures across material topics
5. Prepare disclosures: Write disclosure statements addressing management approach and metrics for each material topic
6. Review and assurance: Review disclosures for accuracy and consider external assurance
7. Publish report: Issue sustainability report and submit GRI Content Index demonstrating compliance

GRI Standards and Supply Chain Reporting

Value Chain Disclosure

GRI Standards require detailed disclosure of the organisation’s value chain (suppliers, distributors, customers) and its impacts within the value chain. GRI Topic Standards on supplier environmental assessment (GRI 308) and supplier social assessment (GRI 414) require organisations to disclose:

• Percentage of suppliers assessed for environmental and social compliance
• Policies and management processes for supplier engagement
• Actions taken in response to supplier non-compliance

This is similar to AASB S2’s requirement to disclose Scope 3 (supply chain) emissions where material, but GRI extends beyond emissions to include labour practices, human rights, and environmental impacts throughout the value chain.

Frequently Asked Questions

Is GRI reporting mandatory in Australia?

No. GRI reporting is voluntary in Australia. However, AASB S1 and S2 mandatory reporting applies to Group 1 entities from FY2025–26. Many organisations use both frameworks to serve diverse stakeholder needs.

Can we use GRI to meet AASB S1/S2 requirements?

GRI reporting can complement AASB S1/S2 requirements but does not substitute for them. GRI provides broader stakeholder-focused disclosure while AASB focuses on financial materiality to investors. Organisations can integrate data collection and reporting to serve both frameworks.

How often should we update our GRI materiality assessment?

GRI recommends reviewing materiality assessments annually or when significant organisational or external changes occur. Business strategy changes, stakeholder feedback, regulatory developments, or material incidents may trigger reassessment.

Which GRI standards should a mining company prioritise?

Australian mining organisations should prioritise the GRI Sector Standard for Mining & Metals, which addresses industry-material topics including biodiversity, resettlement and relocation (indigenous communities), and tailings management alongside universal standards on emissions, labour practices, and supply chain impacts.

Does GRI require third-party assurance?

GRI does not mandate external assurance but encourages it. AASB S1 requires limited assurance under APES 3000 for Group 1 entities. Organisations reporting against both frameworks typically obtain assurance meeting AASB requirements and reference this in their GRI report.

How do GRI Standards compare to TCFD?

TCFD focuses specifically on climate-related financial disclosures (governance, strategy, risk management, metrics). GRI 305 (Emissions) and other climate-related topics (e.g., GRI 308 supplier environmental assessment) align with TCFD but GRI provides broader coverage of environmental, social, and governance topics beyond climate.

Moving Forward with GRI in Australia

GRI Standards offer Australian organisations a comprehensive, stakeholder-focused framework for sustainability disclosure. Whether used as a complement to mandatory AASB S1/S2 reporting or as a voluntary framework to enhance transparency, GRI provides detailed guidance on identifying material topics and communicating sustainability performance to diverse audiences. The framework’s alignment with AASB standards and other frameworks makes it increasingly relevant for Australian organisations seeking integrated sustainability reporting that serves both regulatory and stakeholder expectations.

Ready to develop a comprehensive GRI reporting strategy? Book a Free ESG Strategy Session to assess how GRI can complement your AASB S1/S2 compliance and enhance stakeholder engagement.