- Thailand's Securities and Exchange Commission (SEC) has introduced mandatory sustainability disclosure regulations aligned with International Sustainability Standards Board (ISSB) standards.
- The regulations apply to companies listed on the Stock Exchange of Thailand (SET) and will be introduced in phases from 2027.
- The first phase covers SET50 companies, which will report 2027 sustainability information in 2028.
- The requirements align with IFRS S1 and IFRS S2, covering sustainability-related financial and climate-related disclosures.
- Greenhouse gas emissions information must be verified by assurance providers under internationally accepted standards.
- Transition measures include temporary relief from Scope 3 emissions disclosure during the initial implementation period.
The regulations were issued on October 28, 2026, and took effect on October 26, 2026. They mark a shift towards a standardised approach to corporate sustainability reporting, replacing the flexibility companies previously had to use different reporting frameworks. The new requirements align Thailand's reporting rules with IFRS S1 and IFRS S2, developed by the International Sustainability Standards Board (ISSB). These standards establish a common framework for disclosing sustainability-related financial information and climate-related risks and opportunities.
Implementation will take place in phases based on company categories. SET50 companies will report information for the 2027 financial year in 2028, followed by SET100 companies reporting 2028 information in 2029. All other companies listed on the Stock Exchange of Thailand will follow in 2030, while companies listed on the Market for Alternative Investment (mai), along with specified real estate and infrastructure investment entities, will begin reporting in 2031.
The regulations also introduce requirements for greenhouse gas emissions information to be verified by assurance providers under internationally accepted assurance standards. This is intended to improve the reliability of reported emissions data and give investors and other stakeholders greater confidence in corporate disclosures. The framework includes five transition relief measures, such as flexibility in reporting timelines, exemption from comparative climate information in the first reporting year and temporary exemption from Scope 3 emissions disclosure during the initial implementation period.
The SEC has also prepared updated reporting forms, disclosure guidance and capacity-building initiatives to help companies adapt. Training programmes and supporting materials are intended to improve corporate understanding of ISSB standards and help businesses develop the data systems needed for consistent reporting. The phased approach gives companies time to build reporting capabilities while moving towards a more uniform disclosure framework.
For businesses operating in Thailand, the new requirements will make sustainability data collection, emissions measurement and internal reporting processes increasingly important. Companies will need to coordinate information across finance, operations, risk management and sustainability teams. Suppliers and business partners may also face greater requests for environmental and climate-related information as listed companies improve the quality of their disclosures.
Cognitud's work across ESG strategy, sustainability reporting, climate action and data management aligns with these developments. Cognitud can help organisations assess reporting readiness, identify data gaps and integrate sustainability and climate-related information into their business processes as regulatory disclosure requirements evolve.
