What Is a Materiality Assessment in Sustainability Reporting?

10 Nov 2026

A sustainability report is only as credible as a process most of its readers never see. That process is the materiality assessment: the structured exercise a company uses to identify, evaluate, and prioritise the environmental, social, and governance topics that most significantly affect its business and its stakeholders. This is so that its reporting concentrates on what genuinely matters rather than on everything it could conceivably disclose. For SGX-listed companies, the exercise is not optional. Rule 711B and its accompanying guidance require issuers to disclose the material ESG factors identified for their sustainability report and to explain how those factors were selected, and the materiality assessment produces both. As a public relations firm with its own in-house research desk, GEM COMM reads sustainability reports the way the buy side and sell side do, and that reading shows where materiality work holds up under analyst scrutiny and where it does not.

What Does a Materiality Assessment Actually Involve?

Companies often come to the assessment late, treating it as a box to tick shortly before the report goes to print. Done properly, it does far more: shaping the sustainability report, the ESG communication strategy, and the way management speaks to investors about non-financial issues. A credible assessment typically moves through five stages:

1. Identification comes first, drawing up a long list of ESG topics that could be relevant to the business, drawn from industry benchmarks, reporting frameworks, and the company’s own operating footprint.
2. Stakeholder engagement then tests that list against the views of investors, employees, customers, regulators, and communities to establish which topics carry the most weight.
3. Evaluation assesses each topic against two dimensions: its impact on the business and its significance to stakeholders.
4. Prioritisation then selects the topics that will form the material focus of the report and the company’s wider disclosures.
5. Documentation should run alongside every stage, recording how each decision was reached, since SGX requires issuers to explain how their material factors were chosen.

In practice, documentation is the stage most often left to the end, yet it is precisely what regulators and analysts examine. A report’s credibility rests on the credibility of the assessment behind it.

What Is Double Materiality?

Of the five stages, evaluation is where materiality thinking has shifted most, and double materiality is the concept driving that shift. Any company preparing to align with international standards needs a working command of the concept, which examines each ESG topic from two directions.

• Financial materiality asks how an ESG issue affects the company’s own performance, risk profile, and long-term value.
• Impact materiality reverses the question, looking at how the company’s operations affect the environment, society, and the wider economy.

The distinction has practical consequences in Singapore. The International Sustainability Standards Board (ISSB) standards now being phased into the country’s climate reporting regime are anchored in financial materiality. Straits Times Index (STI) constituents have been required to make full ISSB-based climate disclosures from FY2025; other issuers follow from FY2028 or FY2030, depending on market capitalisation. The Global Reporting Initiative (GRI) Standards, which many Singapore issuers already report against, rest on impact materiality. Many issuers will therefore need to work with both. Assessing topics through both lenses is more demanding, since it means weighing two bodies of evidence, and often two groups of stakeholders, side by side. The return is a report that speaks credibly to financially focused investors and impact-oriented audiences at the same time.

What Is a Materiality Matrix?

However many lenses an assessment applies, its results still have to be presented, and many companies do so through a materiality matrix within the sustainability report. Its construction varies little from one issuer to the next:

• One axis plots the significance of each ESG topic to stakeholders.
• The other axis plots the significance of each topic to the business.
• Topics are placed according to the assessment’s outputs, with those in the upper-right quadrant warranting the greatest disclosure focus.

A matrix communicates the assessment rather than constitutes it. A polished matrix built on a superficial process still misleads the reader, while a rigorous assessment can be presented just as transparently through a ranked table or a short narrative when a matrix does not suit the reporting approach. The format is a choice. The rigour underneath it is not.

What Materiality in Sustainability Reporting Looks Like for SGX-Listed Companies

That rigour is increasingly what Singapore’s regulators and investors look for. The country’s climate reporting requirements, particularly the phased adoption of ISSB-aligned standards, are raising the bar on how listed companies conduct and document their materiality work. The change has less to do with new paperwork than with who is reading the output, and how closely.

• Institutional investors integrating ESG into their analysis increasingly treat the materiality assessment as a signal of how seriously a company takes its sustainability disclosures.
• Regulators expect the selection of material factors to be traceable, defensible, and revisited as the business evolves.
• An assessment that has not been refreshed in several years, or that lists the same generic topics as every peer report, invites scrutiny rather than deflecting it.

In our view, the third point is where most issuers are exposed, because a materiality section that could belong to any company in the sector tells an analyst something on its own. Treated seriously, the assessment becomes one of the clearest ways a listed company can show that its reporting is grounded in its own analysis rather than in surface-level compliance.

Strengthening Your Materiality Assessment with GEM COMM

Seen in that light, a materiality assessment is less a compliance step than the foundation on which a listed company’s ESG credibility with investors and analysts is built. That credibility accumulates across reporting cycles rather than arriving with a single report. GEM COMM works with SGX-listed companies to strengthen both the rigour and the communication of their materiality work, drawing on our familiarity with SGX’s disclosure expectations and with how Singapore’s investment community reads sustainability reports. Each engagement begins with an Introductory Consultation and Strategic Planning Brief, through which we review the current materiality process, sharpen the double materiality lens where it is thin, and shape how material factors are communicated to investors. Where the work extends into our broader investor relations services, eligible companies may be able to draw on the Elevate Grant under the SGX Value Unlock Programme, for which GEM COMM is an appointed service provider. Companies preparing their next sustainability report, or wondering whether the last one would stand up to a closer reading, can reach our team to talk through where the assessment, and the reporting built on it, could go further.