Key Takeaways:
- SASB provides industry-specific sustainability metrics, while ISSB sets a global baseline for sustainability-related financial disclosures.
- Companies can use SASB Standards to identify relevant sector-specific topics and ISSB Standards to structure disclosures in a globally comparable way.
- Both frameworks focus on financially material sustainability matters that may affect enterprise value, investor decisions, risk exposure, and long-term business performance.
Introduction
As sustainability reporting becomes more closely linked to investor confidence, risk management, and corporate accountability, companies need to understand which standards govern their disclosures and how those standards interact. For businesses in Singapore, this is especially relevant as climate-related reporting expectations continue to develop alongside global sustainability disclosure practices.
The discussion around SASB and ISSB can sometimes be confusing because the two are not competing frameworks. Instead, they play complementary roles. SASB Standards provide industry-specific disclosure topics and metrics, while ISSB Standards set a global baseline for sustainability-related financial disclosures. When applied thoughtfully, both can help companies present clearer, more consistent, and more decision-useful information to investors, lenders, boards, and other stakeholders.
Understanding SASB Standards
SASB stands for the Sustainability Accounting Standards Board. Today, the SASB Standards are administered by the IFRS Foundation following the consolidation of the Value Reporting Foundation into the IFRS Foundation in 2022. This means the ISSB now oversees the future development and enhancement of SASB Standards.
The main purpose of SASB is to help companies identify sustainability-related risks and opportunities that are financially material within their specific industries. This sector-based approach recognises that not every sustainability issue matters equally across all businesses. For example, water management may be highly relevant to an agricultural or food-related business, while cybersecurity may be more financially material for a technology company.
SASB Standards include both quantitative and qualitative metrics. These may cover areas such as greenhouse gas emissions, labour practices, data security, product safety, resource use, or business ethics, depending on the industry. The value of SASB lies in its practical focus: it helps companies narrow down the sustainability topics most likely to affect enterprise value, rather than treating ESG reporting as a broad checklist.
This is why SASB and ISSB should not be viewed as fully separate systems. SASB increasingly acts as industry-based implementation support for ISSB reporting, especially for sustainability topics beyond climate. The ISSB is also enhancing SASB Standards through its 2024–2026 work plan, including consultations intended to improve global applicability and support implementation of IFRS S1 and IFRS S2.
Understanding ISSB Standards
The International Sustainability Standards Board, or ISSB, was established under the IFRS Foundation to create a global baseline for sustainability-related financial disclosures. Its first two standards, IFRS S1 and IFRS S2, provide the foundation for companies preparing investor-focused sustainability information.
IFRS S1 sets out general requirements for the disclosure of material sustainability-related risks and opportunities. It asks companies to consider how sustainability matters may affect their prospects over time, including cash flows, access to finance, cost of capital, strategy, and business model. The focus remains on information that is useful to investors and other capital market participants.
IFRS S2 focuses specifically on climate-related disclosures. It covers climate-related risks and opportunities, including governance, strategy, risk management, metrics, targets, and greenhouse gas emissions. IFRS S2 includes disclosure of Scope 1, Scope 2, and Scope 3 greenhouse gas emissions as part of its climate-related disclosure requirements. However, how Scope 3 is reported in practice may be affected by materiality assessments, available IFRS S2 reliefs, estimation methods, and the way each jurisdiction phases in or adopts the standard locally.
For companies already preparing financial reports, ISSB reporting encourages a more connected view of business performance. Sustainability information is not treated as a separate public relations exercise, but as part of how a company explains risks, opportunities, resilience, and long-term value creation.
What are the Key Differences Between SASB and ISSB?
Although the two systems share an investor-focused approach, they differ in scope, structure, and practical application. Understanding these differences helps companies decide how to collect data, structure reports, and align sustainability disclosures with broader business and financial reporting.
Both frameworks apply a financial materiality lens. In simple terms, this means they focus on sustainability-related matters that could reasonably affect enterprise value or investor decision-making. The difference is that ISSB provides the global reporting baseline, while SASB provides more detailed, industry-specific guidance and metrics to help companies apply that baseline in practice.
1. Scope and Approach: Sector-Specific vs Global Standards
SASB Standards are industry-specific. They are organised by sector and industry, giving companies a more targeted way to identify sustainability topics that may be financially material to their business. This can be useful for companies unsure where to begin, as the standards provide a practical starting point grounded in industry characteristics.
ISSB Standards, on the other hand, are designed as a global baseline. IFRS S1 applies to sustainability-related financial disclosures in general, while IFRS S2 focuses on climate-related disclosures. This approach supports comparability across markets, industries, and jurisdictions, which is especially important for investors who assess companies across different countries.
For Singapore companies, the practical approach is not necessarily to choose one over the other. A company may use SASB Standards to identify relevant industry topics and metrics, then use ISSB Standards to structure those disclosures in a globally comparable way. This can reduce duplication and help reporting teams organise information more coherently.
2. Materiality Guidance and Disclosure Structure
SASB focuses strongly on investor-oriented financial materiality. It helps companies identify sustainability issues that may affect financial performance, risk exposure, operating costs, access to capital, or long-term enterprise value. Its strength lies in helping companies determine what is most relevant within their industry.
ISSB also applies financial materiality, but it integrates this lens across governance, strategy, risk management, and metrics and targets. This gives companies a fuller reporting structure. Instead of only disclosing selected metrics, companies need to explain how sustainability-related risks and opportunities are overseen, assessed, managed, and measured.
This distinction matters because stronger reporting is not only about presenting data. It is also about explaining how management understands the issue, how the board oversees it, and how the matter may affect the business over time. Taken together, SASB provides industry-specific detail, while ISSB provides the overall disclosure architecture.
3. Climate and Environmental Disclosures
Climate reporting is one of the clearest areas where the difference between the two systems is most visible. IFRS S2 specifically addresses climate-related risks and opportunities. It covers emissions, transition risks, physical risks, climate resilience, and related metrics and targets. This makes it a central standard for companies preparing climate-related financial disclosures.
SASB also includes environmental metrics, but it is not a climate-only standard. Depending on the industry, SASB may guide disclosure on energy use, water management, waste, emissions, ecological impacts, or other environmental factors. This makes it useful for identifying environmental issues that are financially material within a specific sector.
In practice, the two systems can work well together. A company may use IFRS S2 to structure its climate disclosure, while referring to SASB industry metrics to identify relevant climate-related or environmental indicators. This helps companies avoid overly generic reporting and gives investors more useful sector-specific context.
Applying SASB and ISSB Standards in Practice
Singapore companies can apply these standards in a staged and practical way. The first step is to understand the company’s industry, business model, value chain, and stakeholder expectations. From there, the company can refer to SASB Standards to identify financially material sustainability topics and relevant metrics.
The next step is to align these topics with ISSB disclosure requirements. This means reviewing how each issue connects to governance, strategy, risk management, and performance measurement. For example, emissions data should not sit in isolation. It should be linked to climate-related risks, operational exposure, business planning, and any applicable reporting requirements.
Companies listed in Singapore should also consider SGX sustainability reporting requirements, including the phased movement towards ISSB-aligned climate-related disclosures. While SASB itself is not the direct regulatory driver in Singapore, it can help companies identify sector-specific metrics that support more meaningful climate and sustainability reporting.
What are the Benefits of Integrating SASB and ISSB?
Integrating both frameworks can make sustainability reporting more focused, comparable, and credible. SASB helps companies avoid generic ESG disclosures by pointing them towards industry-relevant topics. ISSB helps companies organise those disclosures in a way that investors can compare across markets and reporting periods.
This combined approach may also support better internal decision-making. When companies map sustainability risks and opportunities clearly, they can better understand which issues may affect operations, financing, reputation, or long-term planning. Reporting then becomes more than an annual compliance exercise; it becomes a useful management process.
For boards and management teams, integrating both frameworks can also improve accountability. It encourages clearer ownership of sustainability-related risks, better data governance, and more consistent communication with investors. Where appropriate, sustainability report assurance can further strengthen confidence in the reliability of reported information.
Navigating SASB and ISSB with Greater Reporting Confidence
The two frameworks are closely connected, but they serve different purposes. SASB provides industry-specific metrics that help companies identify financially material sustainability issues. ISSB provides the global baseline for sustainability-related financial disclosures, including general requirements under IFRS S1 and climate-related requirements under IFRS S2.
For companies navigating sustainability reporting, the challenge is not only knowing which standards apply, but also organising the right data, connecting disclosures to financial reporting, and presenting information with confidence.
Credo Assurance supports small and medium-sized enterprises (SMEs) and larger enterprises in Singapore that need to move from understanding SASB and ISSB to applying them in a structured reporting process. This may include mapping relevant disclosure requirements, reviewing sustainability data sources, checking whether supporting documentation is complete, and assessing whether reporting controls are ready for future assurance.
Led by chartered accountants in Singapore, our accounting firm brings an audit and financial reporting perspective to sustainability disclosures. This helps companies apply the same level of traceability, consistency, and evidence-based review expected in financial reporting to sustainability reporting, rather than managing it as a separate or loosely documented exercise.
Apart from financial accounting advisory services, we review data readiness, check audit trails for reported metrics, assess internal controls around sustainability-related information, and help companies align ESG disclosures with existing financial reporting processes. For example, emissions, workforce, operational, or risk-related data should be traceable, consistently prepared, and supported by clear ownership within the organisation.
Get in touch with us to discuss how your organisation can approach sustainability reporting with greater clarity, structure, and accountability.
