The more useful starting point is materiality. Which environmental, social, and governance factors are genuinely significant to your organisation, either because they affect your ability to create value over time, or because your activities have a meaningful impact on people or the environment? Starting with this question produces a metrics set that is smaller, more credible, and more connected to how your organisation actually affects and is affected by sustainability issues than a comprehensive list would be.
A metric reported with poor underlying data quality does more reputational damage than not reporting on it at all. The question to ask before disclosing any metric is whether the organisation can genuinely stand behind the number.
CSRD's double materiality assessment requires organisations to evaluate sustainability topics from two perspectives simultaneously: financial materiality, asking whether a sustainability issue affects the organisation's financial position, and impact materiality, asking whether the organisation's activities have a significant impact on the environment or on people.
A topic is material under CSRD if it is material from either perspective. This dual assessment is also valuable outside the mandatory CSRD context as a discipline for identifying which metrics actually deserve measurement resource: those with financial significance to the organisation, and those where the organisation's impact is significant enough to warrant disclosure.
Not every organisation needs to track the same metrics. A logistics company faces different material environmental risks from a professional services firm. A retailer with a global supply chain faces different material social risks from a local healthcare provider. Material metrics are those that reflect the actual intersection of the organisation's activities with environmental and social impacts, and the actual financial risks and opportunities the organisation faces from sustainability factors.
For most organisations, greenhouse gas emissions carry the most regulatory and investor weight of any environmental metric. The GHG Protocol Corporate Standard organises emissions into three scopes:
Scope 1 covers direct emissions from operations the organisation controls: combustion in owned or controlled equipment, vehicles, and facilities. These are typically the most straightforward to measure accurately.
Scope 2 covers indirect emissions from purchased energy, primarily electricity and heat. Two accounting methods apply: the location-based method uses the average emissions intensity of the local grid, and the market-based method uses the emissions associated with the specific energy contracts the organisation holds, such as renewable energy certificates. Organisations should disclose which method they use.
Scope 3 covers all other indirect emissions across the value chain. Upstream categories include purchased goods and services, capital goods, fuel and energy activities not covered in Scope 1 or 2, transportation and distribution, waste generated in operations, business travel, employee commuting, and upstream leased assets. Downstream categories include use of sold products, end-of-life treatment, downstream transportation, and downstream leased assets. Scope 3 is by far the most complex category and for most organisations the largest source of total emissions. Organisations subject to CSRD must report on all material Scope 3 categories.
Total energy consumption and the proportion from renewable versus non-renewable sources give context to emissions data and show whether the organisation's energy transition is progressing. Water withdrawal and consumption metrics are material for organisations with significant water dependence or operating in water-stressed regions.
Total waste generated and the proportion diverted from landfill are tracked by most comprehensive ESG reporting frameworks. For organisations where waste is a material issue, more granular metrics covering hazardous waste, electronic waste, and specific waste streams may be appropriate.
Biodiversity metrics are the newest frontier of environmental reporting. The Taskforce on Nature-related Financial Disclosures has published a framework for assessing and reporting nature-related risks and impacts, covering metrics around land use, water use in sensitive basins, and impacts on ecosystem services. Regulatory requirements on nature disclosure are developing rapidly and organisations with material biodiversity impacts should be building measurement capability now.
Total headcount by employment type, region, and gender provides the baseline context for workforce metrics. Gender pay gap reporting is mandatory in several jurisdictions and increasingly expected voluntarily elsewhere. Employee turnover rate, particularly in operationally critical roles, is both an HR metric and an ESG one. Health and safety data covering lost-time injury frequency rates, total recordable incident rates, and fatalities is required by most major reporting frameworks.
Diversity data covering gender at different management levels, ethnic diversity where legally permissible to collect, and disability representation is increasingly expected alongside basic headcount metrics. Training investment expressed as hours per employee or spend per employee demonstrates commitment to workforce development.
For organisations with international supply chains, supply chain social metrics are increasingly material and increasingly required. The proportion of suppliers assessed against labour standards, the number of critical non-compliances identified, the remediation rate, and whether collective agreements or living wage commitments apply across the supply chain all demonstrate active management of human rights risk.
Under the EU's Corporate Sustainability Due Diligence Directive, large companies will be required to conduct due diligence on human rights and environmental impacts across their value chains, making these social metrics central to compliance rather than optional disclosure.
Data privacy incident metrics, including the number of material breaches and regulatory actions, are relevant for organisations where personal data processing is a significant activity. Community investment measured in financial terms is tracked by many organisations, though methodologies vary significantly and comparability is limited.
Board size and independence ratio, the proportion of directors classified as independent of management, are standard disclosures for listed companies and increasingly expected from larger unlisted organisations. Gender diversity on the board and, where tracked, ethnic diversity, are increasingly expected disclosures. The proportion of directors with sustainability-relevant expertise is emerging as a metric as regulators and investors assess whether boards have the capability to oversee ESG risks.
The ratio of CEO total compensation to median employee total compensation is required by SEC rules for US listed companies and tracked by many investors globally. The proportion of executive variable remuneration linked to sustainability metrics signals how seriously the organisation embeds ESG performance into leadership incentives.
The number of material incidents of corruption or bribery, regulatory sanctions related to ethics, and whistleblowing reports received and their outcomes are governance metrics that investors and rating agencies examine for signals about conduct risk. Board-level oversight of material ESG risks, evidenced by board committee terms of reference and minutes that address ESG matters substantively, is an increasingly expected governance disclosure.
For organisations beginning ESG measurement, the most important principle is that an accurate, well-evidenced metric reported in three areas is more valuable than approximate or unverifiable metrics reported in thirty. Starting with the metrics most material to the organisation's specific activities and risk profile, ensuring data quality is sufficient to defend the numbers externally, and expanding coverage incrementally as systems and processes mature, produces more credible and more useful ESG disclosure than attempting comprehensive coverage immediately.
Before disclosing any metric, ask whether the organisation could explain and defend the methodology behind it, whether the data was collected systematically and consistently, and whether an external assurance provider would reach the same conclusion from the same underlying data. If the honest answer to any of these is uncertain, the metric needs either better methodology or should not yet be disclosed publicly.
CSRD's mandatory limited assurance requirement, and the planned progression to reasonable assurance, reflects the regulatory direction of travel: sustainability disclosures need to meet data quality standards comparable to financial reporting. Organisations building their metrics infrastructure should be designing for audit-quality data from the outset rather than retrofitting rigour to estimates.
