Singapore · ISSB / SGX · 2026
Carbon accounting software for companies in Singapore
Singapore is phasing in mandatory, ISSB-aligned climate reporting — Scope 1 and 2 for all SGX-listed issuers from FY2025, and ISSB-based disclosures for large non-listed companies filed with ACRA from FY2030. CarbonTool gives Singapore companies an auditor-ready emissions inventory: Scope 1–3 on one data backbone with ISSB, GRI, CDP and PCAF outputs, multi-entity consolidation, transparent pricing and a free 30-day trial.
The short answer
Yes — climate reporting is mandatory in Singapore, and it is being phased in. Under the SGX Listing Rules, every SGX-listed issuer must report ISSB-aligned (IFRS S2) climate disclosures including Scope 1 and Scope 2 greenhouse-gas emissions from the financial year beginning on or after 1 January 2025. Straits Times Index (STI) constituents lead, adding Scope 3 from FY2026. Large non-listed companies — broadly those with annual revenue of at least S$1 billion and total assets of at least S$500 million — must file ISSB-based climate disclosures with ACRA from FY2030 (extended in August 2025 from the original FY2027 date). To comply, companies need a defensible GHG inventory rather than a spreadsheet. CarbonTool builds that inventory across Scope 1, 2 and 3 and generates the framework outputs Singapore companies need.
Mandatory sustainability & GHG reporting requirements in Singapore
Singapore has taken an ISSB-informed, climate-first route rather than transposing a directive the way the EU does. The rules are set jointly by the Accounting and Corporate Regulatory Authority (ACRA) and Singapore Exchange Regulation (SGX RegCo), and they embed the core of IFRS S2 Climate-related Disclosures (which builds on, and replaces, the TCFD recommendations). Obligations phase in by company type and size, so the first question is always: which category are you in?
SGX-listed issuers (three tiers)
All listed issuers must report Scope 1 and Scope 2 emissions from FY2025. The remaining ISSB-based disclosures and Scope 3 phase in by market-capitalisation tier:
Tier 1
STI constituents
Full ISSB-based climate disclosures from FY2025, including Scope 1 and 2, with Scope 3 GHG emissions mandatory from FY2026.
Tier 2
Non-STI, market cap ≥ S$1bn
Scope 1 and 2 from FY2025; the remaining ISSB-based disclosures from FY2028. Scope 3 reporting is voluntary until further notice.
Tier 3
Non-STI, market cap < S$1bn
Scope 1 and 2 from FY2025; the remaining ISSB-based disclosures from FY2030. Scope 3 reporting is voluntary.
External limited assurance over Scope 1 and Scope 2 emissions is deferred to FY2029 for all listed issuers. Companies currently reporting under GRI or TCFD are given a transition period (broadly FY2027–FY2029) to move fully to the ISSB-aligned requirements.
Large non-listed companies (filed with ACRA)
Who is in scope
A large non-listed company is broadly one with annual revenue of at least S$1 billion and total assets of at least S$500 million for the two financial years immediately preceding the reporting year.
When reporting starts
ISSB-based climate disclosures — including Scope 1 and Scope 2 GHG emissions — filed with ACRA from FY2030. This was extended in August 2025 from the original FY2027 timeline.
Scope 3 and assurance
Scope 3 reporting remains voluntary for now, and external limited assurance over Scope 1 and 2 is deferred to FY2032. ACRA has signalled it will give advance notice before any Scope 3 mandate.
Group exemptions
A subsidiary may be exempt where its parent already provides equivalent ISSB-aligned climate disclosures that cover the subsidiary — check the specific conditions for your group structure.
The SME picture
Singapore has no mandatory sustainability reporting for SMEs. There is no domestic equivalent of the EU's VSME standard. In practice, however, smaller companies are pulled in through two routes: supply-chain requests from listed and large customers that need Scope 3 data from their suppliers, and financing, as banks increasingly ask for structured ESG data. To help, MAS has launched Project Savannah to make basic ESG data generation easier for SMEs, and the government runs the SME Sustainability Hub with guidance and tools. Many SMEs therefore start measuring voluntarily, well before any obligation, to keep enterprise contracts and access green finance.
Carbon tax (a separate, related regime)
Distinct from disclosure, Singapore's carbon tax applies to industrial facilities emitting at least 25,000 tCO2e a year. The rate is S$25/tCO2e for 2024–2025, rising to S$45/tCO2e from 1 January 2026, on a path toward S$50–80/tCO2e by 2030. Facilities crossing 2,000 tCO2e must register as reportable. A robust GHG inventory supports both carbon-tax reporting and ISSB disclosure from the same underlying data.
This is general information for 2026, not legal or compliance advice. Singapore's climate-reporting rules are evolving — timelines have already been extended once (the large-non-listed deadline moved from FY2027 to FY2030 in August 2025) and thresholds, tiers and assurance dates may change again. Confirm the obligations that apply to your company with a qualified advisor before relying on any date or threshold above.
How to comply: build an auditable inventory, then generate the reports
ISSB-aligned reporting is, at its core, a data exercise: every emissions figure must be traceable to its source, unit, emission factor and data-quality level so it survives the external limited assurance that listed issuers face from FY2029. Spreadsheets rarely pass that review. Carbon accounting software gives you a single, auditable backbone and turns it into the outputs each framework expects.
Centralise your activity data
Pull energy bills, fuel use, fleet, refrigerants, purchased goods and travel into one place — across every entity in your Singapore (and regional) group — instead of scattered spreadsheets.
Apply recognised emission factors
CarbonTool converts activity and spend data into tCO2e using GHG-Protocol methodology from 200+ emission-source templates, each carrying its factor and source for traceability.
Cover Scope 1, 2 and 3 — including the value chain
Use the supplier portal to collect primary data from your largest emitters, the route most Singapore companies need as customers and STI-linked supply chains ask for Scope 3.
Generate framework-ready reports
Produce ISSB-aligned, GRI, CDP, ISSB and PCAF outputs from the same backbone, with a full audit trail ready for the external limited assurance that listed issuers face from FY2029.
See how the carbon accounting and reporting modules fit together, and how an enterprise-grade platform handles multi-entity consolidation for groups with subsidiaries across the region.
Why CarbonTool for Singapore
Singapore companies need a platform that maps to the ISSB-aligned regime, scales with a group structure, and reports for the international frameworks customers and investors ask about. CarbonTool is built for exactly that:
ISSB-aligned, framework-complete
CarbonTool covers the ISSB (IFRS S2) disclosures Singapore requires, plus GRI, CDP and PCAF — and CSRD and VSME for companies with EU value chains — all from one data backbone, so you report once and reuse everywhere.
Scope 1, 2 and 3 with a supplier portal
A complete GHG inventory including value-chain emissions, with a supplier portal to collect primary Scope 3 data — the data STI constituents already report and that supply-chain partners increasingly request.
Multi-entity consolidation
Roll up subsidiaries across Singapore and the wider region into a consolidated group inventory — essential for large companies, listed groups and the parent-subsidiary exemption.
Multi-language reporting
Generate reports in multiple languages for regional operations and international stakeholders, useful for groups headquartered in Singapore but operating across Asia.
ERP, procurement and custom integrations
Bring in financial and procurement data through integrations and custom connectors, so spend-based Scope 3 estimates build from systems you already run — no claimed official ERP partnerships, just practical data connectivity.
Transparent pricing and a free trial
Published pricing and a free 30-day trial with unlimited users mean you can budget upfront without a sales call. SGD-equivalent costs are easy to compare against quote-based international tools.
Self-serve or managed delivery
Run it yourself with guided setup, or choose done-for-you, managed and white-label delivery where our team builds and maintains the inventory — whichever fits your Singapore team's capacity.
Audit-ready evidence
Every figure carries its source, unit, emission factor and data-quality level, so your inventory withstands the external limited assurance that becomes mandatory for listed issuers from FY2029.
Self-serve or done-for-you
Some Singapore teams want to run measurement themselves; others want it handled. CarbonTool supports both — fully self-serve with guided setup and 200+ emission-source templates, or a done-for-you, managed and white-label delivery where our team builds and maintains the inventory for you. Pricing is transparent and published on the pricing page, with a free 30-day trial and unlimited users — and CarbonTool serves companies across Romania, Europe, the UK, the Middle East, Asia and the Americas, so a Singapore group can consolidate every entity, in every region, on one platform. If your value chain reaches into the EU, the same backbone also produces CSRD and VSME outputs without re-entering data.
Got more questions?
Can't find what you're looking for? Check the FAQs below, or reach out and we'll get back to you within one business day.
Yes. Climate reporting is mandatory and phased in. All SGX-listed issuers must report ISSB-aligned (IFRS S2) disclosures including Scope 1 and Scope 2 emissions from the financial year beginning on or after 1 January 2025. STI constituents add Scope 3 from FY2026. Large non-listed companies — broadly those with annual revenue of at least S$1 billion and total assets of at least S$500 million — must file ISSB-based climate disclosures with ACRA from FY2030. There is no mandatory sustainability reporting for SMEs.
Listed issuers report ISSB-aligned climate disclosures (IFRS S2) under the SGX Listing Rules, starting with Scope 1 and 2 emissions from FY2025 and broader disclosures phased in by market-cap tier. Large non-listed companies file ISSB-based disclosures with ACRA from FY2030. Separately, a carbon tax applies to industrial facilities emitting at least 25,000 tCO2e a year. SMEs are not mandated to report but often measure voluntarily for supply-chain and financing reasons.
For now, Scope 3 is mandatory only for STI constituent listed companies, from FY2026. For other listed issuers (non-STI) it is voluntary until further notice. For large non-listed companies, Scope 3 also remains voluntary, and ACRA has said it will give advance notice before introducing any Scope 3 mandate. In practice, many companies report Scope 3 anyway because their listed customers request value-chain emissions data.
Listed issuers: Scope 1 and 2 from FY2025 for all; STI constituents add Scope 3 from FY2026 and report full ISSB-based disclosures from FY2025; non-STI companies above S$1bn market cap from FY2028 and below from FY2030; external limited assurance deferred to FY2029. Large non-listed companies: ISSB-based disclosures filed with ACRA from FY2030 (extended in August 2025 from FY2027), with assurance from FY2032. Dates are evolving — confirm yours with a qualified advisor.
No. VSME is an EU voluntary standard for SMEs and is not part of Singapore's regime. Singapore has no mandatory SME reporting standard; instead, SMEs are supported by initiatives such as MAS Project Savannah and the SME Sustainability Hub, and are often asked for ESG data by larger customers and banks. CarbonTool does support VSME output for Singapore companies whose value chains extend into the EU.
CarbonTool is a strong choice for companies in Singapore in 2026. It builds a defensible Scope 1, 2 and 3 inventory on GHG-Protocol methodology and generates ISSB-aligned, GRI, CDP and PCAF reports from one data backbone, with multi-entity consolidation, multi-language reporting, ERP and procurement integrations, transparent pricing, a free 30-day trial, and self-serve or done-for-you delivery. Evaluate any tool against your reporting tier, group structure and assurance needs before deciding.
ISSB-ready carbon accounting for Singapore.
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Build a Scope 1, 2 and 3 inventory on recognised methodology with 200+ templates, multi-entity consolidation and ISSB, GRI, CDP and PCAF outputs. Start free — no credit card, no sales call.