Your Sustainability Sherpa for Thailand's first IFRS S2 reporting year.
Thailand's SEC has made IFRS S1 and S2 aligned reporting mandatory. For SET50 companies, the first reporting year begins on 1 January 2027, and the data collected from that day is the data that will be disclosed and assured. We walk beside your finance, company secretarial and sustainability teams so every number holds up.
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Thailand SEC · In force since 26 October 2026
Thailand's ISSB-aligned rules are now law
Since 2022, Thai listed companies have reported ESG, human rights and greenhouse gas information under a framework of their choice. That choice is ending. On 28 October 2026, the SEC announced that listed companies must disclose sustainability-related financial information aligned with IFRS S1 and IFRS S2, under nine regulatory notifications that took effect on 26 October.
The standard
IFRS S1 and IFRS S2
General sustainability-related financial information and climate disclosures, built into the revised reporting forms, including Form 56-1 One Report and the registration statement.
Assurance
Emissions must be verified
Greenhouse gas emissions disclosures must be verified by assurance providers under internationally accepted assurance standards.
Transitional relief
Five reliefs in the first years
Including no comparative information in the first reporting year, flexibility on the reporting timeframe, equivalent GHG calculation standards, and a temporary exemption from Scope 3 emissions.
Four waves, starting with SET50
Wave 1
SET50
Constituents after the December 2026 index review report 2027 information in 2028.
Wave 2
SET100
Constituents after the December 2027 review report 2028 information in 2029.
Wave 3
All other SET-listed companies
Including new listings, report 2029 information in 2030.
Wave 4
mai, REITs and funds
mai-listed companies, REITs, infrastructure funds and trusts, and property funds report 2030 information in 2031.
Before 1 January 2027
The reliefs buy time on breadth, not on quality
Scope 3 can wait for now. Scope 1 and Scope 2 cannot, and they must hold up in front of an independent assurance provider from the first report. Year one can skip comparatives, but year one's figures become year two's comparatives, so they have to be right the first time.
01
Know which wave you are in
SET50 membership is fixed at the December 2026 review. If you are near the boundary, prepare as if you are in.
02
Draw the boundary around the group
Under IFRS S1, sustainability disclosures cover the same reporting entity as the financial statements. Plant-level or partial data needs redrawing around the consolidated group.
03
Make Scope 1 and 2 assurance-ready from day one
For each emissions source: a named owner, the source documents, the calculation method and emission factors, and a review step. An assurance provider tests the trail, not just the total.
04
Bring the CFO into the room
IFRS S2 asks how climate-related risks and opportunities affect financial position, performance and cash flows, and how they are governed. That is finance and board territory.
05
Use the Scope 3 relief to build, not to wait
Identify your material Scope 3 categories now and start supplier data requests early, so the end of the relief is a step forward rather than a scramble.
Where GovEVA walks with you
Advisors for the judgement calls. Agentic AI for the evidence trail.
Reporting boundary
Our advisors work with finance and company secretarial teams to set the reporting entity and connect climate disclosures to the financial story.
Assurance-ready Scope 1 and 2
GovEVA GreenPath and GovEVA AI read bills, invoices and registers, flag anomalies early, and keep every number traceable to its source.
Scope 3, started early
GovEVA ValueChain Hub connects suppliers and teams across all 15 GHG categories while the relief runs.
Disclosure drafting
GovEVA SmartReporter and GovEVA AI draft disclosures from your own data, so your team edits instead of starting from a blank page.
Agentic ESG IntelligenceAcross plants, suppliers, ERPs, and teams, GovEVA AI reads your ESG data, validates it, answers questions against it, and drafts your disclosures, all traceable to source.
From scattered ESG data
to audit-ready disclosure, handled by agentic AI
Hand it the messy stuff: bills, invoices, scanned PDFs, images, any-shape Excel. It reads every format and files each value where it belongs.
Any format, any sourceAsk it anything about your ESG data and get a straight answer, cited to the source filing. Sealed off from every other tenant by design.
Cited, tenant-isolated answersIt catches the tenfold spike, the missing month, the wrong unit, while you can still fix them quietly.
Audit findings, pre-emptedIt writes the first draft of every disclosure from your own numbers and policies. Your team edits instead of starting from a blank page.
Weeks to hoursEnter a number once. It lands in IFRS S1 and S2, GRI, CDP, TCFD, and BRSR at the same time.
IFRS S1 · S2 · GRI · CDP · TCFDGovEVA AI removes the single largest cost in ESG reporting, manual data entry and reconciliation, all on top of GovEVA's proven ESG platform.
One region, converging rules
Capture the data once. Report it in every market.
For groups with listings or subsidiaries across Southeast and South Asia, each filing still follows its own rules. What can be shared is the layer underneath: data captured once, with its source, owner and method attached, then used for every filing without being rebuilt each time.
Thailand
IFRS S1 and S2 via the SEC
SET50 companies report first, on 2027 data, in Form 56-1 One Report. Emissions disclosures are assured.
Malaysia
NSRF via Bursa Malaysia
The ISSB-aligned NSRF is written into Bursa Malaysia's listing requirements, with the largest Main Market companies reporting from financial year 2025.
India
BRSR via SEBI
India's listed companies report under BRSR, the framework GovEVA's platform and advisors already support listed companies on.
Disclosure quality now carries more weight in Thailand on another front too: the Stock Exchange of Thailand made 2025 the final year of its SET ESG Ratings and is moving to FTSE Russell ESG Scores from 2026.
See GovEVA for Malaysia and SingaporeFAQs
Thailand's ISSB rules, answered
When does ISSB-aligned reporting start in Thailand?
SET50 constituents after the December 2026 review report 2027 information in 2028. SET100 companies follow with 2028 information in 2029, other SET-listed companies with 2029 information in 2030, and mai-listed companies, REITs and infrastructure and property funds with 2030 information in 2031.
Is it mandatory?
Yes. Nine regulatory notifications took effect on 26 October 2026, with obligations applying wave by wave.
Do Thai listed companies need assurance on their emissions?
Yes. Greenhouse gas emissions disclosures must be verified by assurance providers under internationally accepted assurance standards. The SEC's announcement does not specify the level of assurance.
Is Scope 3 required in the first year?
No. Scope 3 emissions are temporarily exempt during the initial implementation period. The announcement does not state how long the exemption lasts.
Where are the disclosures filed?
In the SEC's revised reporting forms, including Form 56-1 One Report and the registration statement.
Let’s Get Started With GovEVA
Whether you're creating your first or tenth ESG report, we walk with you every step of the way. As your sustainability Sherpa, we help you navigate the complexities and stay on course.