GRI and SASB answer different questions. GRI Standards report a company’s impacts on the economy, environment and people, and are written for a broad set of stakeholders. SASB Standards report the sustainability issues reasonably likely to affect a company’s financial condition, and are written for investors. Most Singapore construction firms and developers that report seriously end up drawing on both, then aligning with the ISSB-based rules that now shape listed-company disclosure.
TL;DR
- GRI measures impact materiality (what your business does to the world); SASB measures financial materiality (what sustainability issues do to your numbers).
- The two are designed to complement each other, and many companies use both in one reporting cycle.
- TCFD has been folded into the ISSB’s IFRS S1 and S2, and SASB’s industry metrics feed directly into those standards.
- Singapore listed companies begin ISSB-aligned climate reporting from FY2025, so the practical question is increasingly how GRI sits alongside ISSB, not GRI against SASB alone.
- CSRD applies to a Singapore firm only when it has substantial EU turnover; confirm the current position before assuming exposure.
Table of Contents
- The core difference: two definitions of materiality
- GRI vs SASB at a glance
- Can you use GRI and SASB together?
- Where TCFD fits
- Where CSRD fits
- What Singapore requires
- Applying the standards in a Singapore construction business
- Our perspective
- How MOSAIC supports the data behind your report
- A practical sequence for the next reporting cycle
- FAQ
- Sources
The core difference: two definitions of materiality
The split between the frameworks starts with what each treats as material. GRI Standards focus on a company’s economic, environmental and social impacts on sustainable development, which is known as impact materiality. The same joint guidance states that SASB Standards focus on sustainability issues reasonably likely to materially affect a company’s financial condition and operating performance, which is financial materiality.
In practice this produces two different reports from the same company. A contractor reporting under GRI describes its effect on workers, communities and the environment, including where those effects are unfavorable. A contractor reporting under SASB identifies the narrow set of issues in its industry that could move revenue, cost or access to capital, and reports a defined set of metrics against each.
GRI vs SASB at a glance
| Criterion | GRI Standards | SASB Standards |
|---|---|---|
| Primary question | What impact does the organization have on the economy, environment and people? | Which sustainability issues are likely to affect financial performance? |
| Materiality lens | Impact materiality | Financial materiality |
| Main audience | Broad stakeholders: communities, employees, regulators, customers, investors | Investors and capital providers |
| Structure | Broad topic coverage with qualitative and quantitative disclosures | Industry-specific topics and metrics |
| Best suited to | Building stakeholder trust and a full account of impacts | Meeting specific investor expectations on financially material issues |
The joint GRI and SASB practical guide summarizes the contrast this way: GRI provides comprehensive disclosures on impacts, whereas SASB provides industry-specific disclosures of financially material issues.
What this means for the structure of a report
GRI is organized around broad topics, so a report can cover governance, emissions, workforce, health and safety and community effects in one framework. SASB is organized by industry, so the set of topics is short and the metrics are prescriptive. That is why SASB reports tend to be compact and comparable between peers, while GRI reports tend to be longer and more narrative.
Can you use GRI and SASB together?
Yes, and the standard setters expect it. The joint guidance states that many companies use them together to give a holistic view of both impacts and financial risks. GRI itself has published that GRI and SASB reporting complement each other, citing interviewees at GM and Suncor who used both to address material issues and to improve sustainability performance and communications.
A commercial perspective points the same way. Bloomberg Law’s comparison of ESG frameworks notes that the choice of framework should follow a company’s own ESG objectives and intended audience, and that many large public companies successfully use several frameworks in concert.
A simple way to decide
Start with the reader, not the framework.
- Your main audience is lenders, investors or a listing regulator. Lead with SASB-style financially material metrics, and align with ISSB (covered below).
- Your main audience is clients, government agencies, employees and communities. Lead with GRI, which suits broad stakeholder trust.
- Your audience is mixed, as it is for most developers and main contractors. Use GRI for the full impact account and SASB for the investor-facing financial view, and cross-reference the two in a single index.
Where TCFD fits
Readers often ask about GRI vs TCFD, but the two are not like-for-like. TCFD is a climate-risk disclosure framework, whereas GRI is a general sustainability reporting standard. The more important development is that TCFD has effectively been absorbed. According to the IFRS Foundation, IFRS S1 and S2 have core content consistent with and building on the TCFD recommendations, so companies applying ISSB Standards need not apply TCFD separately.
The same IFRS page explains the link back to SASB. IFRS S1 requires companies to consider SASB disclosure topics and metrics when identifying industry-specific sustainability risks and opportunities, and the industry-based metrics in IFRS S2 are derived from SASB Standards. For a firm choosing between frameworks, this means SASB knowledge is no longer optional background: it is the industry layer of the ISSB regime.
Where CSRD fits
CSRD is European Union law, not a voluntary framework, and it uses its own standards (the ESRS). GRI vs CSRD is therefore a comparison between a voluntary global standard and a regulation. For Singapore companies the question is whether the regulation reaches them at all.
When the CSRD was agreed in 2022, the European Parliament stated that non-EU companies with substantial activity in the EU, defined as €150 million in annual turnover there, would have to follow equivalent reporting rules. A Singapore contractor with no EU operations is unlikely to be affected directly. A firm with an EU subsidiary or large EU sales should confirm its status against the current EU rules, since the scope and timing of CSRD have been subject to revision since 2022.
What Singapore requires
For Singapore companies, the regulatory driver is local. ACRA states that listed companies follow a phased implementation of ISSB-aligned climate reporting starting from FY2025, tiered by market capitalization, with large non-listed companies slated for mandatory reporting from FY2030.
The detail, as set out on ACRA’s requirements timeline (updated 27 July 2026):
- Scope 1 and 2 greenhouse gas emissions reporting is mandatory for listed companies from FY2025.
- Constituents of the Straits Times Index must report Scope 3 emissions from FY2026.
- External limited assurance of Scope 1 and 2 emissions is deferred to FY2029 for listed companies and FY2032 for large non-listed companies.
In plain terms, the mandatory baseline in Singapore is ISSB-based, and ISSB leans on SASB. GRI remains the broader voluntary layer that many firms keep for stakeholder reporting. Research by ACRA and the National University of Singapore found that larger listed companies in carbon-intensive sectors were showing good progress toward these mandates, and the NUS Centre for Governance and Sustainability argues in Sustainability Counts III that transparency supports growth, risk mitigation and access to capital despite the complexity.
Applying the standards in a Singapore construction business
Construction sits at an awkward point in the reporting landscape. Its most material impacts are physical and local: site safety, embodied carbon, waste, noise, supply chain labor. Its most material financial exposures are project-based: cost overruns, regulatory penalties, insurance and the cost of capital.
A Singapore sustainability reporting guide suggests that construction companies can use GRI for comprehensive ESG impact reporting to build stakeholder trust, and SASB’s Construction & Engineering or Real Estate standards for efficient, financially material metrics, while aligning with IFRS S1 and S2 for the emerging SGX climate requirements.
Which GRI and SASB content maps to site operations
The disclosures only carry weight if they rest on controlled systems. Health and safety performance, environmental management and quality records are the data behind both frameworks, and they are produced by the management systems a contractor already runs:
- Safety performance and audit evidence, covered in our guide to Singapore construction safety standards and safety audit examples.
- Environmental controls and legal compliance, set out in our environmental compliance guide for Singapore construction projects.
- Certified environmental management, where ISO 14001 for Singapore contractors provides a verifiable system behind reported environmental figures.
- Energy and building performance for developers, relevant to Super Low Energy status.
A reported number is only as credible as the process that generated it. A GRI or SASB index built on unaudited, ad hoc site data invites challenge from lenders and clients. The same index built on certified systems and documented audits stands up to scrutiny.
Our perspective
We work on the operational side of this question: the safety, environmental and quality systems that generate the numbers a sustainability report later publishes. From that vantage point, the choice between GRI and SASB is rarely the hard part. The hard part is that site-level data is inconsistent across projects, ownership of it is unclear, and the reporting deadline arrives before the controls are in place.
Our advice to contractors and developers is sequenced. First, secure the management systems, because certification and audit trails give every later disclosure a defensible basis. Second, decide the audience for the report, because that settles which framework leads. Third, reuse the same evidence for both frameworks, rather than building parallel data collection for GRI and for SASB.
We also caution against treating reporting as a communications exercise. A main contractor whose safety statistics, environmental incidents and supplier practices are visible in a public report will be judged on them by clients and financiers. Design for Safety decisions made at the drawing stage, hazard control at the work front and documented audits all become reportable outcomes, and the firms that managed them early report with confidence rather than anxiety.
— Aman
How MOSAIC supports the data behind your report
MOSAIC Ecoconstruction Solutions provides Quality, Environment and Safety consultancy and training for the construction sector. For firms preparing sustainability disclosures, the relevant work sits underneath the report: ISO certification to put environmental and quality systems on a verifiable footing, WSH audit and inspection to generate reliable safety evidence, and EHS advisory and documentation to keep records consistent from project to project.
We also support BizSAFE Level 3, Level 4 and Star preparation and Design for Safety advisory. To discuss which of these fits your reporting timeline, contact the MOSAIC team.
A practical sequence for the next reporting cycle
- Confirm your obligation. Check whether you are listed, a large non-listed company, or a supplier to a client that requires disclosures from you. Use the ACRA pages for current timing.
- Name your audiences. List investors, lenders, regulators, clients and community stakeholders, and note what each asks for.
- Map material topics twice. Identify your significant impacts for GRI and your financially material issues for SASB and ISSB. Expect overlap on emissions, safety and governance.
- Fix the data sources. Assign an owner to each metric, and tie it to an audited system.
- Publish one index. Cross-reference GRI disclosures and SASB metrics in a single table so readers can navigate either.
- Plan for assurance. Limited assurance of Scope 1 and 2 emissions is scheduled to arrive for listed companies in FY2029, so records need to be audit-ready well before then.
FAQ
Is GRI or SASB better for a small construction company?
Neither is universally better. If your readers are clients and public agencies, GRI gives a broader account of your impacts. If a bank or investor is asking for financially material metrics, SASB’s industry standards are more focused. Smaller firms often begin with a short GRI-based report and add SASB metrics when a financier requests them.
Does using SASB mean I am following ISSB?
Not automatically. IFRS S1 requires companies to consider SASB topics and metrics, and IFRS S2’s industry metrics are derived from SASB, but ISSB Standards carry additional requirements. SASB is best understood as the industry layer within the ISSB structure.
Do I still need TCFD if I report under ISSB?
No. The IFRS Foundation states that IFRS S1 and S2 build on the TCFD recommendations, so companies applying ISSB Standards need not apply TCFD separately.
Does CSRD apply to a Singapore company?
Only in specific cases. The 2022 agreement set a threshold of €150 million in annual EU turnover for non-EU companies. Firms without EU operations or significant EU sales are unlikely to be caught, but you should verify the current EU rules with a qualified adviser.
Sources
- A Practical Guide to Sustainability Reporting Using GRI and SASB
- GRI and SASB reporting complement each other
- Comparison of ESG Reporting Frameworks, Bloomberg Law
- Introduction to the ISSB and IFRS Sustainability Disclosure Standards
- New social and environmental reporting rules for large companies, European Parliament
- Extended timelines for most climate reporting requirements, ACRA
- Sustainability reporting and assurance requirements, ACRA
- Larger listed companies on track for mandatory climate reporting, ACRA
- Sustainability Counts III, NUS Centre for Governance and Sustainability
- Beginner’s Guide to Sustainability Reporting in Singapore
