ESG scores are increasingly used to assess how businesses manage environmental, social and governance matters. Yet the numbers can be confusing, especially when different rating providers use different scales and methodologies. Understanding what an ESG score measures, how it is calculated and how to interpret it can help investors, business leaders and professionals make more informed decisions.
What is an ESG score?
An ESG score measures how a company performs against environmental, social and governance criteria or how exposed it is to related risks. Investors, lenders and business leaders use ESG scores to evaluate issues that may affect resilience, reputation and long-term value.
The three areas commonly cover:
- Environmental: emissions, energy use, waste and climate risks
- Social: employee wellbeing, human rights, customer safety and community impact
- Governance: board oversight, business ethics, transparency and risk controls
An ESG score is not a universal seal of approval. Its meaning depends on the rating provider’s methodology.
How are ESG scores calculated?
ESG scores are calculated by assessing relevant ESG issues, assigning weights and combining the results into an overall score or rating. Providers may use company reports, regulatory filings, public databases, media coverage and information about controversies.
A typical calculation involves:
- Identifying ESG issues that are material to the company’s industry
- Measuring the company’s exposure to each issue
- Evaluating its policies, programmes and performance
- Reviewing controversies that may indicate unmanaged risks
- Weighting and combining the findings into one result
For example, carbon emissions may receive greater weight for an energy producer, while data privacy may be more material for a technology company.
What does an ESG rating tell you?
An ESG rating indicates either a company’s ESG performance or the level of ESG-related risk it faces, depending on the provider. A high number can therefore mean strong performance in one system but greater unmanaged risk in another.
| Rating approach | What a higher score may mean |
| Performance-based | Stronger ESG policies and outcomes |
| Risk-based | Greater exposure to unmanaged ESG risk |
| Letter grade | Better or worse performance according to the provider’s scale |
Users should check the methodology, rating date and peer group before comparing results. The IFRS Sustainability Disclosure Standards support more comparable, decision-useful sustainability information, but rating agencies can still interpret that information differently.
What does a Sustainalytics ESG score mean?
A Sustainalytics ESG score measures the amount of material ESG risk that remains unmanaged. In this system, a lower score indicates less unmanaged risk.
According to the Sustainalytics ESG Risk Ratings methodology, companies fall into five categories:
- 0 to below 10: negligible risk
- 10 to below 20: low risk
- 20 to below 30: medium risk
- 30 to below 40: high risk
- 40 or above: severe risk
Why do ESG scores matter to GCC companies?
ESG scores can influence investment analysis, financing conversations, supply-chain decisions and stakeholder trust. They are increasingly relevant to organisations operating across Saudi Arabia, the United Arab Emirates, Qatar, Kuwait, Oman and Bahrain as regional sustainability priorities develop.
However, companies should not focus solely on improving a number. Stronger results begin with reliable data, effective governance and ESG practices connected to business strategy.
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