What are ESG metrics?

ESG metrics are measurable indicators of a company's environmental, social and governance performance, such as Scope 1 and 2 emissions, energy use, injury rates, staff turnover and anti-corruption training. They are reported to customers, investors and regulators.

Which ESG metrics actually matter?

The ones your stakeholders already ask for. For most large companies that means energy, Scope 1 to 3 emissions, waste, workforce, health and safety, and ethics metrics, because they recur across CDP, EcoVadis and VSME requests, and the climate figures also feed IFRS S2 based disclosures.

How many ESG metrics should a company track?

There is no fixed number. A core set of around 30 well-evidenced metrics covers most requests for a large company. Add sector-specific metrics only where a customer, investor or regulator asks for them.

How do you measure ESG metrics?

Give each metric a unit, a frequency, a source system and an owner. Collect the figure from the source, such as a utility bill or HR export, keep the evidence attached, and flag any figure that is estimated.

What is the difference between ESG metrics and ESG KPIs?

ESG metrics are the raw measures, such as total tonnes of CO2e. ESG KPIs are the metrics you set targets against and manage performance on, such as a percentage cut in Scope 1 and 2 emissions by a set year.

ESG Metrics: Which Ones Actually Matter for Large Companies in 2026

Most ESG metric lists are too long to collect. Here is the core set customers, investors and regulators ask for, and how to evidence each one.

October 29, 2026

ESG Metrics: Which Ones Actually Matter for Large Companies in 2026

The ESG metrics that matter for a large company are the ones your customers, investors and regulators already ask for. In practice that is a core set of around 30: energy, Scope 1 to 3 emissions, waste and water, workforce, health and safety, and ethics. Choosing them is the easy part. Collecting them every year is where teams struggle.

Why most ESG metric lists are too long

Search for "ESG metrics" and you will find lists of 50, 80, sometimes 200 indicators. They are rarely wrong. They are just unusable for a sustainability team of two or three people supporting a business with thousands of employees and dozens of sites.

The trouble with a long list is that every metric needs an owner and a source. Add a metric without those and all you have really added is another chase. In our sales calls the question we hear most from buyers is some version of "what data do you actually need from us?" Nobody has ever asked us for more metrics.

Start with who is asking

For a large or fast-growing company the requests come from a handful of places, and they overlap far more than their branding suggests:

Customers through supplier questionnaires and ratings such as EcoVadis, which scores 21 criteria across four themes: environment, labour and human rights, ethics and sustainable procurement.
Investors and lenders through CDP and climate disclosures built on IFRS S2, which sets seven cross-industry metric categories, from greenhouse gas emissions to internal carbon prices and remuneration.
Regulators through CSRD for the largest EU-linked groups. Since the Omnibus I package was adopted by the Council on 24 February 2026, that means companies with more than 1,000 employees and over €450 million turnover.
Large customers in Europe asking smaller suppliers for data in line with the voluntary standard, which caps what they can request. We covered that in our piece on the VSME value chain cap.

Lay those requests side by side and the same numbers keep coming back. That shared core is your metric set.

The core ESG metrics, and where each one comes up

Energy consumption by source (kWh, % renewable): asked for by CDP, EcoVadis, VSME and SECR. Usual owner: facilities, finance.
Scope 1 and 2 emissions (tCO2e): CDP, EcoVadis, VSME, IFRS S2 and SECR. Usual owner: sustainability.
Scope 3 emissions by category (tCO2e): CDP, IFRS S2 and SBTi. Usual owner: sustainability, procurement.
Emissions intensity (tCO2e per £m revenue or per employee): CDP and SECR. Usual owner: sustainability, finance.
Waste generated and diverted (tonnes, %): EcoVadis and VSME. Usual owner: facilities.
Headcount and turnover (number, %): EcoVadis and VSME. Usual owner: HR.
Recordable injury rate (rate per hours worked): EcoVadis and VSME. Usual owner: health and safety.
Training hours per employee (hours): EcoVadis and VSME. Usual owner: HR.
Gender pay gap (%): VSME and UK gender pay gap reporting. Usual owner: HR.
Anti-corruption training, convictions and fines (%, number): EcoVadis and VSME. Usual owner: legal, compliance.
Suppliers assessed on sustainability (% of spend): EcoVadis and CDP. Usual owner: procurement.

This is a starting point. A manufacturer will add water and materials, while a lender will add financed emissions. What matters is that each line has a unit and a named owner before the first request goes out.

Three kinds of metric, three ways to collect them

When we walk teams through Ella we split metrics into numeric figures, written commentary and company-specific indicators. It sounds like admin. It changes how you collect.

Numeric metrics should come from the system that already holds them, whether that is a utility bill or an HR platform. Commentary, such as how you manage supplier risk, needs a person and a deadline. Company-specific metrics are the ones a particular investor, customer or private equity owner has invented for itself. Those are the ones that multiply, because every requester words them slightly differently.

Data quality also varies inside a single metric. Business travel is the classic case. Most companies are good at personal mileage because it runs through expenses, while flights take real work and often fall back to spend-based estimates. If you only report the total, nobody can see which part is solid. For carbon in particular, knowing which Scope 3 categories apply to you is the first step to collecting the right data for each.

Our view: the metric is easy, the evidence is hard

Most of the effort in ESG reporting sits between "we know what to measure" and "we can prove it". An auditor or a CDP scorer does not care how elegant your metric list is. They care whether the number has a source.

So our advice to sustainability teams is blunt. Cut the list to what is being asked for and attach a source to every number, whether that is an invoice or a system export. Then report the share of each figure that is estimated, and work that share down year on year. A smaller set of evidenced metrics will score better than a long list nobody can defend.

General AI tools can help draft a policy or summarise a framework. They cannot email the facilities manager at your third site for last quarter's gas bills and follow up when nobody replies. That collection work is where the hours go, and it is the part we built Ella to take on. We wrote about it in more detail in our guide to ESG data collection software.

How to set up your ESG metrics in five steps

List every framework, questionnaire and investor request you answered in the last 12 months.
Map their questions to a single metric set, removing duplicates and noting different wording for the same number.
Give each metric a unit, a reporting frequency, a source system and a named owner.
Collect once and reuse the same figure across CDP, EcoVadis, CSRD or customer questionnaires.
Track the estimated share and missing responses for each metric, and review both before anything is published.

Ella is AI-native ESG reporting software, built as an agent, that runs this process end to end: collect links to data owners, chasing and tracking of missing responses, drag-and-drop bills and spend exports, integrations and surveys, with a source on every number and audit-ready reports at the end.