SGX climate reporting deadlines, explained (2026 edition)

The short version

This guide covers Singapore's regime. For the universal method, see how to calculate your organization's footprint.

Singapore's climate-reporting regime is arriving in waves, and each wave is dated by financial year, not calendar year. If you remember only one table, make it this one:

| Who | What | First reporting year | | --- | --- | --- | | All SGX-listed issuers | Scope 1 + Scope 2 (IFRS S2-aligned) | FY2025 | | Straits Times Index (STI) constituents | Scope 3 added | FY2026 | | Other listed issuers ≥ S$1B revenue | Scope 3 added | FY2028 | | Listed issuers < S$1B revenue | Scope 3 added | FY2030 (subject to review) | | Large non-listed companies (≥ S$1B revenue) | Climate reporting begins | ~FY2030 (deferred; timing to be reassessed) |

A report for FY2025 is filed in 2026 — which is why boards that treated this as a next-year problem are discovering it is a this-year problem.

Wave one: every listed issuer, FY2025

From financial year 2025, all SGX-listed companies must disclose Scope 1 and Scope 2 greenhouse-gas emissions in line with the ISSB's IFRS S2 standard, as adopted into the Singapore regime. There is no comply-or-explain softening for these two scopes: the numbers are expected in the sustainability report.

Practically, Scope 1 + 2 for most issuers means three data sources: fuel records (Scope 1), refrigerant top-ups if material (Scope 1), and electricity bills against the EMA grid emission factor (Scope 2). It is data most companies already possess — sitting in accounts-payable folders as PDFs.

Board accountability is the sharp edge. Under SGX listing rules 711A and 711B, the sustainability report is issued on the board's responsibility; directors sign off on the basis of preparation. A tool (including ours) can prepare the numbers; it cannot own them.

Wave two: Scope 3, biggest companies first

Scope 3 — supplier, logistics, travel and product-lifecycle emissions — is where the effort is, routinely representing the majority of a company's footprint. SGX sequenced it deliberately:

• STI constituents (the ~30 largest listed companies) report Scope 3 from FY2026.
• Listed issuers with revenue of at least S$1 billion follow from FY2028.
• Everyone else listed follows around FY2030, with regulators retaining room to adjust as practice matures.

The mechanism that makes this matter for unlisted SMEs is arithmetic: an STI constituent's Scope 3 is its suppliers' Scopes 1 and 2 (plus their Scope 3, recursively). The moment a large customer starts compiling category-1 purchased-goods emissions, questionnaires flow down the supply chain. In practice, Singapore SMEs started receiving those requests before any rule named them directly.

The non-listed timeline — deferred, not cancelled

The original roadmap had large non-listed companies (revenue ≥ S$1 billion) reporting from FY2027. Following the 2025 review of implementation experience, that start has been deferred to around FY2030, with the government signalling it will reassess scope and timing. Two honest readings of that deferral:

1. Relief is real. If you are non-listed and under S$1B revenue, no direct mandate binds you this decade on current plans.
2. The market moved anyway. Bank sustainability-linked financing, government tenders, and multinational procurement all now ask for emission numbers regardless of mandate. The deferral changed the regulator's deadline, not your customers'.

Assurance: the next cliff after disclosure

Disclosure and assurance are separate obligations. The current trajectory phases in external assurance on Scope 1 and 2 for listed issuers from around FY2029, with the wider assurance timeline under review. What that means today: the methodology behind your FY2025–FY2028 numbers will eventually be examined, so an auditable trail — which factor, which source, which document — is worth building from the first report. Retro-fitting provenance three years later is vastly more expensive than capturing it at calculation time.

The mistakes we see most often

Three recurring errors are worth naming because each is cheap to avoid and expensive to unwind. Confusing financial years with calendar years: a company with a March year-end reports FY2025 data for April 2025 to March 2026 — its first climate report covers months that may already be gone. Reporting dollars instead of activity data: a spend figure divided by a tariff is an estimate wearing a disguise; regulators and customers expect kWh, litres, and tonne-km, which is why bills beat ledgers as source documents. Losing the factor trail: a total without the factor source and year behind each line cannot be re-verified next year, and re-deriving it later costs more than capturing it did. Every number this site produces carries its factor, source, year and licence for exactly that reason.

A pragmatic sequence for an SME

1. Start with the bills you have. Twelve months of electricity bills and fuel receipts gets you a defensible Scope 1 + 2 baseline — our free calculators or a document upload will do the arithmetic with sourced factors.
2. Capture provenance as you go. Keep the factor source and year attached to every number; it is the difference between an estimate and evidence.
3. Answer customer questionnaires from the baseline, not ad hoc — one consistent number beats five improvised ones.
4. Treat Scope 3 as directional first. Spend-based estimates for your biggest purchase categories flag the hotspots; refine with real activity data only where it is material.

Sources

• SGX RegCo — sustainability and climate reporting requirements for issuers: sgx.com/regulation
• ACRA — climate reporting for non-listed companies (implementation updates): acra.gov.sg
• IFRS Foundation — IFRS S2 Climate-related Disclosures: ifrs.org