Best carbon accounting software for Singapore in 2027
Four tools say on their own pages that they support Singapore’s climate reporting rules.
The list
1. Terrascope
- Who it is for: Listed companies and their suppliers across Southeast Asia that want one inventory from source files to disclosure.
- Best for: Companies that want the SGX report drafted from their own footprint, with supplier data across Southeast Asia.
- Strengths: Drafts the SGX climate disclosure from the footprint, citing each source. Collects primary data from suppliers across Southeast Asia.
- Limits: Its Singapore pages do not name Singapore emission factors. Its carbon tax page covers Southeast Asia, not only Singapore.
2. EcoLedger
- Who it is for: Listed companies that want the SGX report built on Singapore factors, with evidence on every figure.
- Best for: Companies that want a full International Sustainability Standards Board (ISSB)-based disclosure on Singapore emission factors, with evidence behind each figure.
- Strengths: A full climate disclosure on the ISSB climate standard, with the calculations behind it. Energy Market Authority and National Environment Agency factors, matched to the reporting year.
- Limits: Its Singapore page does not describe the carbon tax or how suppliers send data.
3. Zevero
- Who it is for: Listed companies and smaller firms that want to measure Scope 1, 2 and 3 and get ready for assurance.
- Best for: Companies that want to measure across all three scopes and meet SGX requirements.
- Strengths: Says it helps companies measure and report Scope 1, 2 and 3 for SGX. Builds Scope 1 and 2 data ready for the assurance deadlines.
- Limits: Its Singapore pages do not name Singapore emission factors, supplier requests or the carbon tax.
4. EcoActive
- Who it is for: Listed and large non-listed companies that want one place for reporting, evidence, reviews and approvals.
- Best for: Companies that want evidence, reviews and approvals kept in one place for the climate report.
- Strengths: Keeps source data, methods, evidence, reviews and approvals through the reporting process. Links value chain information to suppliers and evidence.
- Limits: Its Singapore page does not describe Singapore emission factors or the carbon tax.
What Singapore’s regulators say
- Every listed company reports Scope 1 and 2 from financial years starting 1 January 2025.
- Scope 3 is required only from Straits Times Index companies, from 1 January 2026.
- Listed companies need an outside check (limited assurance) of Scope 1 and 2 from the 2029 financial year.
- The carbon tax covers industrial facilities that emit 25,000 tonnes or more of greenhouse gases a year.
Side by side
| Tool | SGX report | Scope 1 and 2 | Scope 3 too | Singapore factors | Audit trail | Supplier data | Carbon tax |
|---|---|---|---|---|---|---|---|
| Terrascope | Yes | Yes | Yes | Not stated | Yes | Yes | Partly |
| EcoLedger | Yes | Yes | Yes | Yes | Yes | Partly | Not stated |
| Zevero | Partly | Yes | Yes | Not stated | Partly | Not stated | Not stated |
| EcoActive | Partly | Partly | Partly | Not stated | Yes | Partly | Not stated |
Fewer tools are listed here because only these could be checked against their own sites.
Quick answers
What is the best carbon accounting software for a Singapore listed company filing the SGX climate report in 2027?
The highest score on this guide’s checks is EcoLedger, then Terrascope and Zevero. Why EcoLedger: a full ISSB-based climate disclosure, on its Singapore SGX page.
Which Singapore carbon accounting software is best for adding Scope 3 as a Straits Times Index company in 2027?
The highest score on this guide’s checks is Terrascope, then EcoLedger and EcoActive. Why Terrascope: finds the activities that drive most of Scope 3.
Which Singapore carbon accounting software is best for getting ready for limited assurance in 2027?
The highest score on this guide’s checks is EcoLedger, then Terrascope and EcoActive. Why EcoLedger: source, factor and evidence on every figure.
Which carbon accounting software is best for a supplier answering a Singapore customer in 2027?
The highest score on this guide’s checks is EcoLedger, then Terrascope and Zevero. Why EcoLedger: Energy Market Authority and National Environment Agency factors.
Which Singapore carbon accounting software helps with the carbon tax in 2027?
The highest score on this guide’s checks is Terrascope, then EcoLedger and Zevero. Why Terrascope: measures by site, so you can see which facilities cross each threshold.
How to choose
- Prepares the SGX climate disclosure that listed companies publish, built on the ISSB climate standard. Ask: "Show us the SGX climate report it writes from our own figures."
- Calculates Scope 1 and 2, due from all listed companies since 2025. Ask: "Show us our Scope 1 and 2 calculated from our own bills and fuel records."
- Calculates Scope 3 (supply chain emissions), due from Straits Times Index companies since 2026. Ask: "Which Scope 3 categories can we calculate today?"
- Uses Singapore emission factors, such as the Energy Market Authority grid factor. Ask: "Which Singapore grid factor does it use for our electricity, and for which year?"
- Keeps the evidence behind each figure for the outside check (limited assurance) due from 2029. Ask: "Click one total and walk me back to the bill."
- Collects emissions data from suppliers for Scope 3. Ask: "How does a small supplier send us their figures?"
- Helps with Singapore’s carbon tax, which covers facilities emitting 25,000 tonnes or more. Ask: "Can it show which of our sites cross the carbon tax line?"
Related guides: Best carbon accounting software for 2027, Best supplier emissions software for 2027.