ส่งมอบ 11 August 2026, in a function room at the Best Western in Chatuchak, Thailand’s mandatory corporate carbon report quietly stopped being a policy debate and became a piece of software with a login screen.
The Department of Climate Change and Environment — กรมการเปลี่ยนแปลงสภาพภูมิอากาศและสิ่งแวดล้อม, the agency Thais now call กรมลดโลกร้อน — convened a public consultation on the information system for reporting greenhouse gas emissions data that will carry the reporting duty under Thailand’s draft Climate Change Act. One hundred people attended: officials, and representatives of the นิติบุคคล — the juristic persons — who will have to use it.
Two details in the department’s own notice are worth more to a sustainability team than any amount of commentary on the bill. First, the system was designed with the Thailand Greenhouse Gas Management Organization (TGO), Stock Exchange of Thailand และเป็น Department of Alternative Energy Development and Efficiency. Second, it had already been test-driven by 52 pilot companies before the room ever sat down.
The law is not passed. The system is being built anyway — and the companies who will be obliged to file are already in the beta.
The meeting that tells you what is actually coming
Regulatory intent is usually easiest to read not in the draft text, which moves, but in the plumbing, which does not. Governments build the pipe they actually intend to use.
According to DCCE’s notice, the consultation was chaired by Deputy Director-General Komes Phutthason, and the feedback it sought was strikingly operational. Participants were asked about four things: the operating process, verification carried out by the juristic person, method of reportingและ reporting timeframe. Those are not the questions you ask when a policy is still being decided in principle. They are the questions you ask when you are about to ship.
The department also said it plans to run training and knowledge transfer on using the system for the companies concerned. Read that plainly: the operational shape of Thailand’s mandatory carbon report — who logs in, what they upload, how often, and what has to have been checked first — is being fixed now, in 2026, by the people who show up to these consultations. Track the Thai regulatory calendar →
เพื่อให้ระบบสามารถรองรับการดำเนินงานตามร่างพระราชบัญญัติการเปลี่ยนแปลงสภาพภูมิอากาศ พ.ศ. …. หมวด 6 ส่วนที่ 2 อย่างครบถ้วน — “so that the system can fully support operations under Chapter 6, Part 2 of the draft Climate Change Act.”
DCCE notice of the 11 August 2026 consultation · dcce.go.th (our translation)What Chapter 6, Part 2 obliges a company to do
The system exists to serve one specific piece of the draft: Chapter 6, Part 2. It is worth knowing what that chapter contains, because it is the part of Thai climate law that will land directly on a finance or sustainability function.
The draft Climate Change Act, approved in principle by Cabinet on 2 December 2025 and now under review by the Council of State, runs to 14 chapters and 205 sections. Chapter 6 — ข้อมูลก๊าซเรือนกระจก, greenhouse gas data — is one of the longest. Its second part creates the corporate reporting duty, and in the department’s own published summary the architecture is clear:
Juristic persons under private and public law of the types specified in a ministerial regulation — so the covered list is set later, by subordinate legislation, not by the Act itself.
General information on the entity, its emissions or reductions, its measurement plan, and the reduction measures it has already undertaken.
The report must be verified by a body accredited under the national standardisation law — third-party verification is built into the duty, not bolted on afterwards.
TGO checks and certifies the verified report, then forwards it to the Department within the prescribed period. Two institutions sit between you and the filing.
A caution worth stating plainly, because a lot of commentary gets it wrong: the section numbering is still moving. The 2024 consultation draft and the 2025 Cabinet-approved summary do not number these provisions identically, and the Council of State is still working through the text. Cite the duty, not a section number, until the Act is gazetted.
The word that sets the cost: ทวนสอบ
If you read only one word of Chapter 6, make it ทวนสอบ — verification.
Thai corporate carbon work has, until now, been overwhelmingly voluntary: a TGO Carbon Footprint for Organization certification pursued because a customer asked, an index wanted it, or the board liked the look of it. Voluntary work is priced as a project. A verified statutory filing is priced as an audit — it needs an inventory boundary you can defend, activity data with an evidence trail, emission factors you can source, and a document set an accredited verifier can walk through without a Thai-language guided tour.
And verification capacity is the constraint. It is not a coincidence that on 3 August 2026, a week before this consultation, SET and TGO signed a three-year cooperation agreement whose stated purpose includes expanding the pool of qualified greenhouse gas validators and verifiers in Thailand. Two arms of the state are visibly trying to manufacture verifier supply ahead of a demand curve they can already see. Every listed company that waits until the ministerial regulation names its sector will be queueing behind the ones that did not.
The practical on-ramp is unglamorous and well established: get the inventory to TGO CFO standard now, while it is a competitive advantage rather than a compliance scramble. See what TGO CFO certification involves →
The Act is not passed — and that is precisely the point
The obvious objection is that none of this is law yet. The bill sits with the Council of State; enforcement is widely anticipated in 2027; the ministerial regulation naming covered sectors does not exist. All true — and it is exactly why this consultation matters more than the bill’s next procedural step.
Thailand is doing what several jurisdictions have done: building the reporting infrastructure in parallel with the legislation, so that the duty can commence quickly once the Act is in force. The 52 pilot companies are not volunteers being helpful. They are the calibration set. The reporting cadence, the file formats, the evidence a verifier will expect — these are being decided from their experience, not from yours.
Note also what surrounds Chapter 6 in the same draft: an emissions trading system, a carbon tax, a cross-border carbon price adjustment mechanism — a Thai analogue to the EU’s CBAM — and a sustainable economic activity taxonomy. Every one of those instruments needs the same input: a verified emissions number per entity. Chapter 6 is the meter that all the other chapters read. Thai exporters already face the EU version →
Filing in Thai is compliance. It is not visibility.
Here is where a Thai listed company should be careful about declaring victory. A verified inventory filed to a Thai government portal, in Thai, discharges a Thai legal obligation. It does not, by itself, put the number anywhere a global analyst will find it — and those are two different jobs with two different audiences.
| Filed to DCCE | Published for investors | |
|---|---|---|
| กลุ่มเป้าหมาย | A Thai regulator | Index providers, raters, lenders, EU customers |
| Trigger | A statutory duty, once in force | Continuous — public sources are read year-round |
| ภาษา | ไทย | Whatever an analyst can actually read |
| การตรวจสอบ | Required by accredited body | Adds credibility; not always required |
| What it proves | You complied | You can be assessed |
The evidence on that second column is worth stating carefully, because it is often overstated. FTSE Russell assesses companies from public disclosure, with no questionnaire — its ESG data model methodology is explicit that only public sources are used. Its own FAQ lists the key languages covered by its research process, and Thai has never appeared on any version of that list. FTSE does not say it requires English; it says what its analysts routinely cover. The risk that creates is evidentiary, not a stated penalty: evidence an analyst cannot read is evidence they may not find.
One chain is harder-edged than that. CDP’s Terms of Disclosure permit responses only in a short list of languages, and state that a response submitted in any other language will not be scored. Thai is not on the list. And FTSE Russell’s own FAQ states that CDP information is material to a company’s ESG score. That is a published rule with a stated consequence, running end to end. Separately, in EU law, the CBAM implementing regulation is blunt: the operator’s emissions report shall be submitted in English. Compare what each rater actually publishes →
And the honest counterweight, which we would rather you hear from us: Thai companies are scoring well and improving fast. SET’s own published figures for the most recent round cover 222 Thai listed companies at an average FTSE ESG score of 3.6 out of 5.0, up from 3.0 the year before, with governance strongest of the three pillars. Nobody should sell you a story in which Thai issuers are being systematically marked down. The argument for a strong English edition is not that you are being penalised — it is that the work you are about to do under Chapter 6 is expensive, and it deserves to be legible to everyone who is in a position to reward it. From TGO carbon number to investor-facing disclosure →
What to do in the next two quarters
Nothing here requires a company to guess. The sequence is unusually clear for a rule that is not yet in force:
- Assume your sector will be named. If you are energy, petrochemical, cement, steel, or a large industrial emitter, the ministerial regulation is a question of when, not whether.
- Get the inventory to TGO CFO standard now — a defensible boundary, sourced factors and an evidence trail are what survive ทวนสอบ later.
- Book verification capacity early. SET and TGO are visibly expanding the verifier pool because supply, not demand, is the bottleneck.
- Treat the DCCE filing and your investor disclosure as two deliverables from one dataset — never let the numbers diverge between them.
- Publish the number where it can be assessed, in a language your readers can actually read — and reconcile it line-for-line with the Thai filing.
Turn one carbon number into both filings
One verified inventory should satisfy a Thai statutory filing and an investor-facing English disclosure without the two ever disagreeing. That reconciliation is what we build.
See the clause-mapped bilingual approachThailand’s mandatory carbon report is being assembled in public, one consultation at a time, by the agencies that will run it. The companies that treat the next two quarters as preparation — rather than the next two years as a warning — will file a number they can defend, in a form the rest of the market can read. Start with your climate disclosure readiness →
Sources: DCCE notice of the 11 August 2026 consultation on the GHG data reporting information system (dcce.go.th); DCCE summary of the draft Climate Change Act (14 chapters, 205 sections; Chapter 6 on greenhouse gas data); Cabinet in-principle approval, 2 December 2025; SET–TGO cooperation agreement, 3 August 2026; FTSE Russell ESG Scores FAQ and ESG data model methodology; CDP Terms of Disclosure; Commission Implementing Regulation (EU) 2025/2547, Art. 10(4); SET × FTSE Russell published score summary. The draft Act is not enacted and its section numbering is still changing — verify against the gazetted text before relying on it.
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