Singapore’s ESG reporting timeline and requirements are rapidly evolving, with ACRA and SGX RegCo announcing new deadlines in August 2025 to extend compliance timelines for non-STI listed companies and large non-listed enterprises.
Understanding Singapore’s ESG Reporting Timeline Requirements
Singapore has implemented a phased roadmap for mandatory climate-related disclosures (CRD), which applies to both listed and large non-listed enterprises. The Singapore ESG reporting timeline was significantly revised in August 2025 to accommodate businesses of various sizes and preparation levels. This comprehensive guide outlines the specific requirements, deadlines, and compliance steps that your organization must follow.
For SGX-Listed Companies: The Three-Tier Structure
The regulatory authority has created a tiered approach based on market capitalization, recognizing that different company sizes face different resource constraints.
STI Constituents (Top 30 Companies):
| Scope | Phase |
| Scope 1 & 2 GHG Emissions | Mandatory from FY2025 |
| Scope 3 GHG Emissions | Mandatory from FY2026 |
| Other ISSB-Based Disclosures | Mandatory from FY2025 |
| External Limited Assurance | Required from FY2029 (extended from FY2027) |
Non-STI Listed Companies (Market Cap ≥ SGD 1 Billion):
| Scope | Phase |
| Scope 1 & 2 GHG Emissions | Mandatory from FY2025 |
| Scope 3 GHG Emissions | Voluntary until further notice |
| Other ISSB-Based Climate Disclosures | Mandatory from FY2028 (extended from FY2025) |
| External Limited Assurance | Required from FY2029 |
Non-STI Listed Companies (Market Cap < SGD 1 Billion):
| Scope | Phase |
| Scope 1 & 2 GHG Emissions | Mandatory from FY2025 |
| Scope 3 GHG Emissions | Voluntary until further notice |
| Other ISSB-Based Climate Disclosures | Mandatory from FY2030 (significantly extended from FY2025) |
| External Limited Assurance | Required from FY2029 |
For Large Non-Listed Companies (LNCos): Extended Timelines:
Large non-listed enterprises with annual revenue ≥ SGD 1 billion and total assets ≥ SGD 500 million now have substantially extended compliance windows:
| Scope | Phase |
| ISSB-Based Climate Disclosures & Scope 1/2 Emissions | Mandatory from FY2030 (deferred from FY2027) |
| Scope 3 GHG Emissions | Voluntary (and remain voluntary) |
| External Limited Assurance | Required from FY2032 (extended from FY2029) |
Why Was the Singapore ESG Reporting Timeline Extended?
In August 2025, ACRA and SGX RegCo announced timeline extensions to account for “varying levels of resources and readiness in climate reporting.” Companies have more time to:
- Develop Data Collection Infrastructure: Most organizations lack the systems to accurately measure Scope 1, 2, and 3 emissions.
- Create Governance Frameworks: Implementing climate accountability structures requires board-level oversight and internal resources.
- Learn from Early Adopters: STI constituents who are leading the way provide real-world implementation lessons.
The extensions reflect feedback from the Singapore Business Federation and other industry bodies, ensuring compliance is feasible without overwhelming smaller enterprises.
ISSB Standards: What Companies Must Disclose
The disclosure requirements in Singapore are based on the International Sustainability Standards Board (ISSB) standards, specifically IFRS S1 (general sustainability) and IFRS S2 (climate-specific). The key components are:
- Governance: Board oversight and management responsibilities for climate risk.
- Strategy: How climate affects your business model and value chain.
- Risk Management: Processes to identify, assess, and manage climate-related risks.
- Metrics & Targets: Scope 1, 2, and 3 emissions with reduction commitments.
Practical Compliance Checklist for Singapore Companies
Immediate Actions (FY2025 & FY2026):
☐ Assess Your Classification: Determine if you’re STI, Non-STI ≥ SGD 1B, Non-STI < SGD 1B, or a large non-listed company.
☐ Map Your Scope 1 & 2 Emissions: Collect data on direct (Scope 1) and energy-based (Scope 2) GHG emissions.
☐ Establish Governance: Assign board-level climate oversight and accountability
☐ Identify Scope 3 Sources: Map indirect emissions (supply chain, use of products) if you’re an STI constituent.
Medium-Term (FY2027 – FY2029):
☐ ISSB Transition Planning: For companies with FY2028/FY2030 ISSB deadlines, begin building disclosure frameworks
☐ Assurance Readiness: Start working with auditors on external limited assurance processes (all listed companies need this by FY2029)
☐ Data System Refinement: Validate measurement accuracy and implement automation where possible
Long-Term (FY2030+):
☐ Full ISSB Compliance: Complete climate-related disclosure aligned with ISSB standards (by FY2030 at the latest)
☐ External Assurance: Obtain limited external assurance on Scope 1 & 2 emissions (or unlimited assurance if required)
☐ Stakeholder Communication: Integrate ESG reporting into investor relations and annual communications
Key Takeaways: Singapore ESG Reporting Timeline
- Scope 1 & 2 emissions are non-negotiable from FY2025 for all listed companies – no exceptions
- Company size matters: Three-tier system gives smaller listed companies until FY2030 for full ISSB compliance
- External assurance is coming: By FY2029 (listed) or FY2032 (large non-listed), third-party verification becomes mandatory
- Scope 3 is complex: Currently only mandatory for STI constituents; others have flexibility to plan
The Singapore ESG reporting landscape is not a one-size-fits-all compliance burden – it’s a phased journey. Companies that start data collection and governance work today will avoid rushed, error-prone implementations later.
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