Overview of Thailand’s SEC ISSB roadmap
Introduced: October 2024 (SEC consultation)
Effective from: FY 2026 (SET 50 cohort)
Last modified: December 2024 (consultation closed; final rules expected 2025)
Region(s): Thailand
About the SEC’s ISSB roadmap
Thailand’s Securities and Exchange Commission (SEC) is implementing a phased roadmap for mandatory sustainability disclosure under the IFRS S1 and S2 standards (“Climate‑First” ISSB Adoption Roadmap).
The approach begins with a “climate-first” mandate, requiring only IFRS S2 climate-related disclosures for the first five years. Larger companies will lead the transition, with structured reliefs including delayed Scope 3 reporting and extended filing windows.
This roadmap supports regional alignment and investor transparency, embedding ESG data into Thailand’s Form 56-1 One Report.
Criteria for compliance
FY 2026
SET 50 companies (largest 50 by market cap)
FY 2027
SET 100
FY 2029
All remaining SET Main Board issuers
FY 2030
MAI-listed companies, REITs, Infrastructure Funds, and Trusts
Disclosure requirements
Full IFRS S2 climate disclosures including:
- Governance, strategy (with scenario analysis), risk management, metrics & targets
- Scope 1 & 2 GHG emissions (mandatory)
- Scope 3 emissions phased in after first 2 years
Plus required integration with financial statements (narrative linkage). IFRS S1 general ESG disclosures to follow in later stages.
Key obligations
- File sustainability information within Form 56-1 One Report
- Submit reports within 3 months of year-end (during transition)
- Maintain board-level oversight on ESG disclosures
- File electronically via the SEC’s portal
Third-party assurance
Limited assurance on GHG data required starting from each cohort’s first reporting year. Assurance must be performed by verifiers registered with Thailand Greenhouse Gas Management Organization (TGO) or equivalent accredited bodies.
Penalties for non-compliance
SEC may impose administrative fines, require restatements, or suspend trading, with escalating penalties for inaccurate, incomplete, or unverified data. Non-compliant firms may also face reputational risk and market access barriers.
