July 2026 update: Singapore extended several climate-reporting and assurance timelines in August 2025. This guide now reflects the current requirements for Straits Times Index constituents, other SGX-listed companies and large non-listed companies.
Singapore’s climate-reporting requirements no longer follow one timetable for every listed company.
All companies listed on the Singapore Exchange must report Scope 1 and Scope 2 greenhouse gas emissions for financial years beginning on or after 1 January 2025.
The remaining requirements are being introduced in stages. The timetable differs for STI constituents, other SGX-listed companies grouped by market capitalisation, and large non-listed companies that meet specified revenue and asset thresholds.
Under the current rules, an STI constituent is a company that was included in the Straits Times Index on 30 June 2025. Other listed companies are divided into those with market capitalisation of at least S$1 billion on that date. A large non-listed company generally has annual revenue of at least S$1 billion and total assets of at least S$500 million
The changes affect when businesses must report Scope 3 emissions, apply other ISSB-based climate disclosure requirements and obtain external limited assurance.
This guide explains the current position, what has changed from the original 2024 roadmap, and what businesses should prepare for next.
The regulations and implementation details can change. Companies should review ACRA’s current sustainability reporting and assurance requirements as well as the relevant SGX rules before making reporting or compliance decisions.
Singapore’s climate-reporting timeline at a glance.
The current timetable uses a tiered approach based on company type, STI status and market capitalisation.
| Financial year beginning on or after | Companies affected | Requirement |
| 1 January 2025 | All SGX-listed companies | Report Scope 1 and Scope 2 greenhouse gas emissions. |
| 1 January 2025 | STI constituents | Report other ISSB-based climate-related disclosures. |
| 1 January 2026 | STI constituents | Report Scope 3 greenhouse gas emissions. |
| 1 January 2028 | Non-STI listed companies with a market capitalisation of S$1 billion or more | Report other ISSB-based climate-related disclosures. |
| 1 January 2029 | All SGX-listed companies | Obtain external limited assurance for Scope 1 and Scope 2 emissions. |
| 1 January 2030 | Non-STI listed companies with a market capitalisation below S$1 billion | Report other ISSB-based climate-related disclosures. |
| 1 January 2030 | Large non-listed companies, unless exempted | Report ISSB-based climate-related disclosures, including Scope 1 and Scope 2 emissions. |
| 1 January 2032 | Large non-listed companies, unless exempted | Obtain external limited assurance for Scope 1 and Scope 2 emissions. |
Scope 3 reporting remains voluntary until further notice for non-STI listed companies and large non-listed companies.
For companies already affected, a financial year beginning on or after 1 January means the requirement applies from the first relevant financial year starting on or after that date.
What changed from Singapore’s original climate-reporting roadmap?
When Singapore announced its roadmap in February 2024, the intention was to introduce most requirements more quickly and apply several of them broadly across listed companies.
ACRA and SGX RegCo revised that approach in August 2025 after considering differences in reporting readiness, resources and the wider economic environment.
The main changes were:
- Scope 1 and Scope 2 reporting stayed in place. All listed companies must report these emissions from FY2025.
- Scope 3 reporting was narrowed. It became mandatory for STI constituents from FY2026. It remains voluntary for other listed companies until further notice.
- Other ISSB-based disclosures were divided into tiers. STI constituents began in FY2025, larger non-STI companies follow in FY2028, and smaller listed companies follow in FY2030.
- External assurance was delayed. The requirement for listed companies moved from FY2027 to FY2029.
- The timetable for the large non-listed company was extended. Reporting moved from FY2027 to FY2030, while external assurance moved to FY2032.
The revised system gives less-prepared companies more time to build data collection, governance and reporting capabilities. It does not remove the requirements or the need to prepare.
Which listed companies must report and when?
ACRA divides SGX-listed companies into three tiers.
Tier 1: Straits Times Index constituents.
Companies that were STI constituents on 30 June 2025 are the first group required to implement the fuller climate-reporting regime.
They must:
- Report Scope 1 and Scope 2 emissions from FY2025.
- Report other ISSB-based climate-related disclosures from FY2025.
- Report Scope 3 emissions from FY2026.
- Obtain limited external assurance for Scope 1 and Scope 2 emissions from FY2029 onward.
The requirements continue to apply even if a company later leaves the STI.
Tier 2: Non-STI listed companies worth S$1 billion or more.
A non-STI company falls into this tier if its market capitalisation was at least S$1 billion at the close of market on 30 June 2025.
These companies must:
- Report Scope 1 and Scope 2 emissions from FY2025.
- Report other ISSB-based climate-related disclosures from FY2028.
- Obtain limited external assurance for Scope 1 and Scope 2 emissions from FY2029 onward.
Scope 3 reporting remains voluntary until further notice.
For companies listing after 30 June 2025 with a market capitalisation of at least S$1 billion, the other ISSB-based disclosure requirement applies from the later of FY2028 or the company’s first full financial year after listing.
Once the company falls within this tier, the requirement continues even if its market capitalisation subsequently drops below S$1 billion.
Tier 3: Other non-STI listed companies.
Listed companies that are neither STI constituents nor within the S$1 billion tier must:
- Report Scope 1 and Scope 2 emissions from FY2025.
- Report other ISSB-based climate-related disclosures from FY2030.
- Obtain limited external assurance for Scope 1 and Scope 2 emissions from FY2029 onward.
Scope 3 reporting remains voluntary until further notice.
The detailed requirements for listed companies appear in SGX Practice Note 7.6
Which large non-listed companies must report?
A large non-listed company falls within the mandatory reporting regime when it meets both of these criteria:
- Annual revenue of at least S$1 billion.
- Total assets of at least S$500 million.
Unless exempted, these businesses must report ISSB-based climate-related disclosures, including Scope 1 and Scope 2 emissions, from FY2030.
Scope 3 reporting remains voluntary until further notice. External limited assurance for Scope 1 and Scope 2 emissions begins in FY2032.
When can a large non-listed company be exempted?
An exemption may apply where:
- An immediate, intermediate or ultimate parent company prepares climate or sustainability reports using ISSB-based local reporting standards or recognised equivalent standards.
- The Singapore company’s activities are included in the parent company’s report.
- That report is publicly available.
Companies should obtain specialist advice before relying on an exemption. ACRA has stated that it will provide further guidance on standards considered equivalent as international disclosure requirements develop.
What must companies disclose?
The requirements cover greenhouse gas emissions and, depending on the company’s tier, also include broader information on climate-related risks and opportunities.
Scope 1 greenhouse gas emissions.
Scope 1 covers direct emissions from sources a company owns or controls.
Examples may include:
- Fuel burned in company-owned facilities.
- Emissions from company vehicles.
- Industrial or manufacturing processes.
- Refrigerant leaks from company-controlled equipment.
These emissions arise directly from the organisation’s operations or assets.
Scope 2 greenhouse gas emissions.
Scope 2 covers indirect emissions associated with purchased energy consumed by the company.
This can include:
- Electricity.
- Steam.
- Heating.
- Cooling.
The emissions occur where the energy is generated, but they are included in the purchasing company’s greenhouse gas inventory because its operations use that energy.
Scope 3 greenhouse gas emissions.
Scope 3 covers other indirect emissions across a company’s value chain that are not included under Scope 2.
Examples can include:
- Purchased goods and services.
- Transport and distribution.
- Business travel.
- Employee commuting.
- Waste generated in operations.
- Use of products sold.
- End-of-life treatment of products.
- Investments and financed emissions.
Scope 3 is usually more difficult to calculate because the information may sit with suppliers, customers and other parties outside the company’s direct control.
Under the current Singapore timetable, mandatory Scope 3 reporting from FY2026 applies to STI constituents. It remains voluntary for other listed companies and large non-listed companies until further notice.
What are other ISSB-based climate-related disclosures?
Climate reporting extends beyond calculating emissions.
The wider requirements cover how the business identifies, manages and communicates climate-related risks and opportunities through:
- Governance: How the board and management oversee climate-related issues.
- Strategy: How climate risks and opportunities affect the business model, plans and financial outlook.
- Risk management: How the company identifies, assesses, prioritises and monitors climate-related risks.
- Metrics and targets: How performance is measured, which targets have been set and how progress is tracked.
Singapore’s requirements draw on IFRS S2 Climate-related Disclosures and the climate-relevant provisions of IFRS S1.
The rules for listed companies do not automatically require every issuer to state full compliance with all IFRS Sustainability Disclosure Standards. Companies need to follow the specific requirements and transition arrangements that apply to their tier.
When is external assurance required?
External limited assurance will be required for Scope 1 and Scope 2 greenhouse gas emissions from:
- FY2029 for listed companies.
- FY2032 for large non-listed companies.
The assurance provider must be either:
- An audit firm registered with ACRA.
- A testing, inspection or certification firm accredited by the Singapore Accreditation Council.
Assurance involves an independent review of the reported information against the relevant criteria. Businesses should engage qualified assurance specialists early enough to understand the evidence, systems and controls that will be expected.
What do the extended timelines mean for businesses?
The extensions reduce immediate compliance pressure for some companies. They do not turn climate reporting into a distant concern.
Reliable reporting relies on data that may come from facilities, finance teams, procurement systems, suppliers, transport providers and other parts of the value chain. Finding the information is one task. Establishing consistent definitions, ownership, review processes and controls can take far longer.
Businesses outside the first reporting tier may also face requests before their legal deadline.
Customers, lenders, investors, parent companies, and multinational supply chain partners may request emissions information as part of their own reporting and procurement processes. A business can therefore face commercial pressure to improve its data even when mandatory reporting remains several years away.
ACRA and SGX RegCo said the revised timetable was intended to give companies time to build their reporting capabilities and learn from organisations already producing ISSB-based disclosures. That time should be used deliberately.
How can businesses prepare for Singapore’s climate-reporting rules?
The right preparation will depend on the company, its reporting tier and the systems already in place. These six actions provide a sensible starting point.
1. Confirm which timetable applies.
Establish whether the company is:
- An STI constituent.
- A non-STI-listed company valued at least S$1 billion.
- Another SGX-listed company.
- A large non-listed company.
- Outside the current mandatory regime.
Check the relevant assessment dates, exemption conditions, and financial year start.
2. Assign clear internal ownership.
Climate reporting can involve sustainability, finance, risk, legal, operations, procurement, investor relations and communications teams.
Decide who owns each part of the work. Without clear responsibility, data gaps and conflicting definitions can stay hidden until late in the reporting cycle.
3. Review current data and reporting gaps.
Identify which Scope 1 and Scope 2 information is already available, how it is calculated and where evidence is stored.
Businesses preparing for Scope 3 reporting will also need to assess their value chain, relevant emissions categories and the availability of supplier or customer data.
4. Build repeatable collection and review processes.
A one-off spreadsheet may help with an early estimate, but mandatory reporting needs a process that can be repeated and checked.
Document data sources, calculation methods, assumptions, review responsibilities and approval steps.
5. Engage qualified reporting and assurance specialists.
Climate reporting involves technical standards, emissions accounting, governance, controls and regulatory interpretation.
Use appropriately qualified advisers for the reporting framework, data calculations, assurance readiness and legal or regulatory questions.
6. Plan how approved information will be communicated.
The final disclosures may need to be compatible with several formats.
Investors may need detail about financial risks and governance. Employees may need a clearer explanation of operational priorities. Customers and partners may want evidence related to products, procurement, or the supply chain.
Communications planning should begin once the underlying facts, disclosures and terminology have been approved.
What support is available for sustainability reporting?
Singapore-incorporated companies may be eligible for the Sustainability Reporting Grant to help prepare their first sustainability report that incorporates ISSB-based climate-related disclosures.
As of this July 2026 update, the grant can cover up to 30% of qualifying costs, capped at S$150,000.
Eligible organisations include:
- Singapore-incorporated SGX-listed companies preparing their first qualifying report before their mandatory deadline.
- Singapore-incorporated companies with annual revenue of at least S$100 million that meet the programme requirements.
Qualifying costs can include external consultancy, assurance, equipment and software, and certain employee training expenses.
Businesses should review the current criteria and application details on the Enterprise Singapore Sustainability Reporting Grant page before applying.
How climate reporting fits within ESG.
Climate reporting primarily falls under the environmental pillar of ESG, but the work often intersects with broader governance and social issues.
Board oversight, controls, accountability and reporting processes fall within governance. Changes to operations and supply chains may affect employees, communities, customers and suppliers.
For a wider view of the three pillars, explore:
The individual topics are connected, although they may require different evidence, specialist input and stakeholder messages.
Communicating climate-reporting information clearly.
Climate disclosures begin with standards, data and technical review. The finished information still needs to make sense to people.
A sustainability report may include complex calculations and formal disclosures alongside:
- Leadership messages.
- Explanations of strategy and priorities.
- Employee and community stories.
- Case studies.
- Operational updates.
- Progress against targets.
- Challenges and areas still being developed.
Those elements help readers understand what the figures mean inside the organisation.
Kyyte works alongside sustainability, reporting and communications teams to shape approved information into clear content. Our role can include report storytelling, opening messages, section narratives, leadership commentary, website copy, stakeholder communications, employee stories and content repurposing.
Our sustainability and ESG marketing services support organisations that need to communicate progress without making vague claims or losing sight of the evidence behind their work.
We also provide wider ESG and sustainability copywriting for websites, articles, case studies, internal communications and stakeholder content.
Approved reporting material can also support useful content beyond the report itself.
Read more about:
FAQs: Climate reporting in Singapore.
Does every company in Singapore have to report climate information?
No. Current mandatory requirements apply to SGX-listed companies and large non-listed companies that meet the specified revenue and asset thresholds. Other companies may still be asked for emissions or sustainability information by customers, investors, lenders, parent companies, or supply chain partners.
Which companies must report Scope 1 and Scope 2 emissions?
All SGX-listed companies must report Scope 1 and Scope 2 greenhouse gas emissions from financial years beginning on or after 1 January 2025. Large non-listed companies that meet the applicable criteria must report them as part of ISSB-based climate disclosures from FY2030, unless exempted.
Is Scope 3 reporting mandatory in Singapore?
Scope 3 reporting is mandatory from FY2026 for companies that were STI constituents on 30 June 2025. It remains voluntary for other SGX-listed companies and large non-listed companies until further notice.
When do non-STI-listed companies need to make broader climate disclosures?
Non-STI-listed companies with a market capitalisation of S$1 billion or more must report other ISSB-based climate-related disclosures from FY2028. Other non-STI-listed companies follow from FY2030.
When must large non-listed companies begin climate reporting?
Large non-listed companies that meet both the S$1 billion annual revenue threshold and S$500 million total asset threshold must report from FY2030, unless an exemption applies.
When is external assurance required?
External limited assurance for Scope 1 and Scope 2 emissions begins in FY2029 for listed companies and FY2032 for large non-listed companies.
What is the difference between Scope 1, Scope 2 and Scope 3 emissions?
Scope 1 covers direct emissions from sources the company owns or controls.
Scope 2 covers indirect emissions associated with purchased energy.
Scope 3 covers other indirect emissions across the company’s value chain.
What does ISSB-based climate reporting cover?
It covers greenhouse gas emissions and how a company manages climate-related risks and opportunities through governance, strategy, risk management, metrics, and targets.
How can Kyyte support climate-reporting communications?
Kyyte works from approved reporting information and specialist input to develop leadership messages, report narratives, employee stories, case studies, website content, internal communications and supporting marketing materials. We can also turn finished report content into articles, social content and stakeholder updates for use throughout the year.
Prepare for the deadline and the communication that follows.
Singapore’s revised timetable gives many companies more time. It also makes the order of preparation clearer.
First, establish which reporting tier applies. Then strengthen the data, governance, reporting processes and specialist support needed for that deadline.
Once the information has been reviewed and approved, the communication work begins.
A strong report should help stakeholders understand the figures, decisions, progress and remaining challenges. The same source material can then support websites, investor updates, internal communications, case studies, articles and leadership content.
Kyyte helps organisations bring that material to the fore through clear, evidence-led ESG communication.
Explore our sustainability and ESG marketing services or contact Kyyte to discuss the stories and supporting content around your sustainability work.
This article provides general information and does not constitute legal, accounting, sustainability-reporting or assurance advice. Requirements were checked against ACRA and SGX materials available on 14 July 2026. Companies should consult the relevant authorities and qualified advisers about their circumstances.
