CBAM Is Moving Downstream — Straight Into Thailand’s Export Engine

For three years, Thai boardrooms have been able to file the EU’s Carbon Border Adjustment Mechanism under “a steel and aluminium problem.” That framing has quietly expired. Over the last eight weeks, both EU co-legislators have taken formal positions on extending CBAM well beyond raw materials — into the machinery, vehicle components and domestic appliances that make up the bulk of what Thailand actually sells to Europe.

On 12 June 2026, the Council of the EU agreed its general approach backing the Commission’s proposal to add roughly 180 steel- and aluminium-intensive downstream products to CBAM from 1 January 2028. Three weeks later, on 6 July 2026, the European Parliament’s environment committee (ENVI) went further, adopting a position covering more than 400 product codes plus tougher anti-circumvention rules. Parliament is expected to adopt that position in its September plenary, after which trilogue negotiations begin.

Nothing is law yet. But the direction of travel is now agreed by both institutions, and the disagreement is about how far, not whether. For a Thai exporter, that is the difference between a watching brief and a data project.

What changed in Brussels this summer

The sequence matters, because it tells you how settled this is. The European Commission adopted the scope-extension proposal on 17 December 2025, alongside the implementing acts that made CBAM’s definitive phase operational from 1 January 2026. The proposal targets goods that are heavily steel- or aluminium-intensive and therefore carry a clear carbon-leakage risk — fabricated metals, machinery and industrial equipment, vehicle components such as gearboxes and engines, domestic appliances, and construction equipment. By the Commission’s own analysis, more than 90% of the affected goods sit in industrial supply chains; only around 6% are household products.

The Council endorsed that scope on 12 June 2026, refined the product list, backed the new anti-circumvention measures, and mandated the Commission to review annually which further downstream goods should be pulled in. ENVI then voted on 6 July to widen it again — adding items such as fasteners, wire, springs and household articles, plus urea, ammonium nitrate and ammonium sulphate, and replacing the parcel-by-parcel exemption for online trade with a weight-based threshold.

Why “downstream” is the word that matters in Thailand

Here is why this lands differently in Thailand than the original CBAM did. Thailand exported €29.9 billion of goods to the EU in 2025 out of €44.3 billion in two-way trade, and the European Commission’s own trade profile describes those imports as consisting mainly of machinery and appliances. Raw steel and aluminium were never the centre of gravity of that relationship. Downstream metal-intensive manufacturing is.

The scale of the original exposure was already meaningful: Kasikorn Research Centre estimated that CBAM’s paid phase would touch about 3.8% of Thai exports to the EU in 2026 — roughly ฿28 billion — concentrated in steel and aluminium, with cement and fertiliser barely affected because Thailand ships so little of them. Extend the scope to gearboxes, engines, appliances, fasteners and fabricated metal, and the affected population stops being a short list of mills and starts being a long tail of Tier-1 and Tier-2 suppliers, many of them SET- and mai-listed, many of them supplying multinationals who will pass the data request straight down the chain. See our CBAM briefing for Thai exporters →

Only the input emissions count — but you have to prove them

One detail in the proposal is doing a lot of work, and it is widely misread. For downstream goods, CBAM does ไม่ได้ price the emissions of your factory. It prices the emissions embedded in the precursor materials — the steel or aluminium you bought and formed. The Commission’s own worked example: a car door manufactured outside the EU would carry a CBAM obligation for the emissions embedded in the steel plate used to make it, but ไม่ได้ for the pressing of that plate into a part or its assembly.

That sounds like relief. In practice it is a sourcing-data problem, and a harder one. It means the number your EU customer needs is not something you can generate from your own meters — it has to be traced back through your suppliers, mill by mill, and it has to survive verification. CBAM’s definitive phase already requires verified embedded emissions, applies a de minimis of 50 tonnes of covered goods per importer per year, opens certificate sales on 1 February 2027, and sets the first annual declaration — covering 2026 imports — at 30 September 2027.

The same carbon number now has two audiences

This is where CBAM stops being a customs topic and becomes a disclosure topic — and where most Thai companies are running two disconnected workstreams that should be one.

The carbon number you build for your EU customer is, in substance, the same number your investors are about to demand. Thailand’s SET50 companies report climate-first under TSRS (the Thai adoption of IFRS S1 and S2) from 2027, with SET100 following in 2028 the year after and the obligation widening from there. And from 2026 the Stock Exchange of Thailand publishes FTSE Russell ESG Scores in place of the retired SET ESG Ratings, with the FTSE4Good Thailand Index live since 6 July 2026.

FTSE Russell scores you from public disclosure only — there is no questionnaire to fill in, and no chance to hand over a private data pack. It reads your 56-1 One Report, your sustainability report and your website. And it reads them in English: FTSE Russell’s own ESG Scores FAQ lists the key languages covered by its research process as English, French, Spanish, German, Japanese and Chinese. Thai is not among them. This is why the English edition earns the score →

So the same tonne of embedded CO₂e has two audiences with two failure modes. Get it wrong for Brussels and your importer pays a certificate cost — or drops you for a supplier who can show their numbers. Get it right for Brussels but leave it buried in a Thai-only filing, and a rater assessing your Supply Chain and Climate Change themes finds nothing to score. A theme that is thorough in Thai and thin in English does not score badly. It scores as missing. How disclosure gets lost in translation →

What Thai manufacturers should do before the plenary vote

The plenary vote in September will set Parliament’s negotiating mandate, and trilogue will decide whether the final list looks more like 180 codes or more like 400. Neither outcome removes the underlying obligation, and neither changes what a Thai manufacturer needs to have ready. Track the live Thai ESG regulatory calendar →

For SET-listed manufacturers there is one more date worth pinning to the wall. For FTSE Russell’s December index review, only company disclosures published by 30 September are considered; anything later waits for the next assessment cycle. Companies publishing between April and September can expect their review invitation by the first weekend of October. If your English edition is going to carry your carbon numbers this year, it has to be live before that gate closes. From TGO certificate to FTSE-readable disclosure →

CBAM began as a levy on commodities. It is becoming a documentation standard for anything metal-intensive that crosses the EU border — and the evidence it demands is the same evidence Thai investors, the SEC and FTSE Russell are about to demand in parallel. The companies that build one verified carbon number and publish it properly in both languages will spend 2027 answering customer questionnaires in an afternoon. The rest will spend it reconstructing data they already had. See how a clause-mapped bilingual One Report works → Or start with TGO CFO certification →

Sources: Council of the EU press release, 12 June 2026; European Commission (DG TAXUD), “Commission welcomes Council agreement on strengthening CBAM”, 12 June 2026; European Parliament ENVI committee position, 6 July 2026 (reported by Carbon Pulse, ESG Today and SteelOrbis); European Commission CBAM scope-extension proposal, 17 December 2025; European Commission EU–Thailand trade profile (2025 data); Kasikorn Research Centre via The Nation, 4 January 2026; FTSE Russell ESG Scores and Indices FAQ; Thai SEC / TSRS phased adoption timeline.