IFRS S2 &
One Report Readiness
Thailand’s SEC is turning the 56-1 One Report from comply-or-explain into mandatory, ISSB-aligned climate disclosure. SET50 first — then the market. We build the report that clears the bar, in both languages.
The One Report is now a compliance document
The SEC’s ISSB Roadmap adopts IFRS S1 & S2 into the 56-1 One Report — moving climate and sustainability disclosure from voluntary narrative to mandatory, investor-grade reporting tied to your financials. SET50 leads in 2026; the rest of the market follows.
Four pillars, one disclosure
IFRS S1 and S2 are structured on the same four content pillars — the TCFD architecture, now hard-wired into the One Report. Each must be answered with evidence, not intent.
Today’s One Report won’t clear the bar
Most current One Reports treat sustainability as a narrative section. IFRS S1/S2 demand something structurally different — and the gap is where the compliance risk sits.
| Today’s One Report | What IFRS S1/S2 requires |
|---|---|
| A standalone ESG / sustainability section | Climate risk integrated with strategy, financials and prospects |
| Qualitative narrative and highlights | Quantified metrics, targets and Scope 1–2 GHG data |
| No forward-looking analysis | Scenario analysis across 1.5°C, 2°C and higher warming |
| Comply-or-explain, flexible | Mandatory, structured to a defined standard |
| Unassured ESG claims | Assurance-ready data, escalating to reasonable assurance |
A phased path, 2026 to 2030
The mandate arrives in phases — with transition reliefs that are a runway to build the machinery properly, not a reprieve.
- 2026SET50 begin — climate-firstThe largest issuers start disclosing under IFRS S2 (plus relevant S1) in the One Report. Foundation year: governance, strategy and core metrics.
- 2027–2028Scenario analysis deepensClimate scenario analysis across 1.5°C, 2°C and higher-warming pathways becomes expected — and disclosure widens beyond the first cohort.
- 2029–2030Reasonable assuranceSustainability data moves to reasonable assurance, and Scope 3 plus fuller S1 sustainability topics phase in.
The report that clears the bar — in both languages
We build the IFRS S2 disclosure into your One Report, clause-mapped and bilingual, on numbers that reconcile to verified data.
File in Thai. Score in English. Every IFRS S1/S2 requirement mapped, so nothing is missing and every line is traceable. See the product →
Othello builds disclosure and readiness support; it does not provide assurance or issue an audit opinion.
Everyone the roadmap reaches
SET50 first — but the runway to build it right is open to the whole market now.
Clear the bar, on the runway.
Send us your latest 56-1 One Report. We’ll return a clause-level read of where it meets IFRS S1/S2 and where the gaps are — governance, scenario analysis, metrics and the bilingual parity that decides the score — under NDA from the first email.