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ESG vs. CSR vs. sustainability: What's the difference?

Environmental, social and governance and corporate social responsibility are related but different concepts that can be combined to boost corporate sustainability.

The terms environmental, social and governance and corporate social responsibility are being used more widely to describe how businesses can show their commitment to sustainability.

The two terms have some overlapping meaning and are sometimes used interchangeably. But with new tightening expectations on corporate practices and increasing concerns surrounding environmental sustainability, businesses should know what these terms mean, how they differ and where they overlap.

Respondents to the World Economic Forum's 18th annual "Global Risks Perception Survey," which was released in January 2023, signaled environmental factors as the most critical threats to the world over the next 10 years. Climate change mitigation and adaptation failures, extreme weather and biodiversity loss were at the top of that list.

According to the most recent version of Gartner's annual survey of CEOs and other senior business executives, conducted in late 2021, environmental sustainability is now a top 10 business focus for the first time in the history of the survey, ranking eighth on the list of priorities cited by respondents. And for good reason: With growing fears about the state of the environment and the ability to prove ROI for sustainability practices, businesses are under increasing pressure to not only behave ethically and responsibly, but also to demonstrate that they are doing so.

For example, the European Union's Corporate Sustainability Reporting Directive (CSRD) came into force in January 2023, creating new environmental, social and governance (ESG) reporting standards for some 50,000 companies starting in 2025. Also, in early 2022, the U.S. Securities and Exchange Commission (SEC) proposed a more limited climate risk disclosure rule that, if enacted, will result in new ESG reporting and compliance requirements for publicly traded companies.

What is ESG?

ESG is a quantifiable assessment of sustainability and business practices. ESG strategy focuses on reaching certain performance metrics, setting measurable goals for them and conducting audits to verify that the metrics and related disclosures are accurate. There are explicit criteria surrounding ESG. For example, ratings agencies like Bloomberg, MSCI, S&P Global and Morningstar's Sustainalytics subsidiary give companies ESG scores using different sets of performance criteria. Investors use these scores to evaluate businesses and, ultimately, inform their investment choices. Businesses create ESG reports to appeal to investors and other stakeholders and to meet regulatory compliance requirements.

ESG encourages businesses to behave ethically and helps define a company's financial value and its compliance record. It also helps investors avoid losses when companies act in a risky manner. Different investment firms may rate ESG criteria differently based on their own priorities.

The three aspects covered by ESG initiatives are the following:

  1. Environmental. These criteria may include corporate climate policies, energy use, waste management and treatment of animals.
  2. Social. These criteria cover the company's relationship with stakeholders other than investors, such as employees or community members. Meeting ESG's social criteria may involve implementing diversity, equity and inclusion initiatives, making donations, encouraging employees to volunteer and engaging in supply chain sustainability and ethics practices.
  3. Governance. These criteria hold companies to ethical accounting and financial reporting standards and also include factors such as board diversity, executive compensation and rules on ethical business practices.

What is CSR?

Corporate social responsibility (CSR) is a self-regulating business model that aims to improve society and the environment. It's a looser, general framework for corporate behavior that can vary in terms of its implementation. The nature of CSR is qualitative, although the ISO 26000 voluntary standard does help companies define social responsibility and provides practical guidance for achieving it.

Good CSR helps companies maintain a positive brand image and boosts stakeholder morale. Companies usually highlight the achievements of their CSR efforts in annual reporting.

Learn why marketing should lead corporate social responsibility efforts to improve a company's reputation, especially with a Generation Z audience.

In one particularly notable example of CSR, Yvon Chouinard, the founder of apparel company Patagonia, pledged all of its future profits to an organization that fights the climate crisis in September 2022. Money not reinvested in running the business is now distributed to the charity. That amounts to about $100 million per year, according to Patagonia.

Other more conventional examples include a commitment by Starbucks to eliminate plastic straws globally -- as reported in the "Starbucks 2021 Global Environmental & Social Impact Report" -- and The Home Depot's commitment to improving employee benefits, as reported in its 2021 ESG report. In another example, Better World Books, which sells used books online, donates a book to someone in need for each book purchased.

What is sustainability?

In its broadest definition, sustainability refers to the ability to support and continue a process over time.

Corporate sustainability encompasses the business practices that keep a business going and perpetuate its success. More specifically, it involves the coordination and management of environmental, social and financial demands to ensure a business is responsible, ethical and continually successful. Sustainability lets companies meet present needs without compromising the ability of the business to meet its needs in the future.

Business sustainability, as it's also known, is often broken into three pillars:

  1. Economic, or profit.
  2. Social, or people.
  3. Environmental, or planet.

These three pillars are sometimes referred to as the triple bottom line -- a play on the traditional concept of the bottom line that refers to immediate profit being the No. 1 priority for businesses. By comparison, the triple bottom line takes a broader view that includes the overall economic value created by companies and their social and environmental impact.

The term sustainability is often used in other, nonbusiness contexts to refer to environmental, social, policy or economic sustainability.

Where do ESG, CSR and sustainability overlap?

Sustainability is the umbrella that both ESG and CSR fall under and contribute to. ESG and CSR are both ways that businesses can demonstrate their commitment to sustainable business practices. CSR can be seen as the idealistic, big-picture perspective on sustainability, and ESG as the practical, detail-oriented perspective.

CSR can also be seen as the precursor to ESG. Companies self-regulate and commit to sustainable practices with the aim of making a positive impact on society. Then, the efforts undertaken in a CSR strategy can be refined and fit into ESG metrics. ESG data can then later be publicly disclosed and shared via ESG reports. ESG puts a quantifiable stamp of credibility on the broad management philosophy of CSR. A business needs both practices in order to be truly sustainable.

ESG vs. CSR vs. sustainability comparison chart
Both ESG and CSR are different ways of achieving sustainability goals.

How to implement each

ESG starts with CSR. For guidance on CSR, companies can consult voluntary standards, such as ISO 26000. When developing a CSR program, companies should consider the following:

  • The company's core competencies. A core competency is something the company is uniquely good at. It could be buying power, product quality or innovation capabilities. For example, a company that excels at minimizing costs can direct money toward an environmental activism organization. Companies should strive to embed sustainability into existing processes.
  • The issues that customers care about. These could be environmental or social issues identified in a survey or the aspects of the company or brand that resonate with customers. A company could survey customers about issues they most care about and align the results with a product they respond positively to.
  • The issues that employees care about. Companies can survey employees about what means a lot to them and plan programs based on the results, while also providing volunteering opportunities.
  • Quantifying the results of efforts that are tied to the bottom line. For example, a company that sets the goal of reducing waste might want to measure its progress to later report to investors and other stakeholders in an ESG report.
  • Current societal, industry and environmental trends. If a climate report has just been released, a company might align its goals with the data contained in the report. If a natural disaster has taken place, a company might align its CSR strategy with the discourse surrounding the disaster by participating in the recovery effort in some way.

When constructing an ESG strategy, companies should also consider the above factors. ESG strategies must also consider reporting laws and requirements, as well as investor interests, because ESG is more closely tied to compliance and stock performance. There are many ESG reporting frameworks and standards that companies can consult when developing a strategy, including the following examples:

  • United Nations (U.N.) Sustainable Development Goals.
  • U.N. Guiding Principles on Business and Human Rights.
  • IFRS Sustainability Disclosure Standards, which are new unified reporting standards being developed by the International Sustainability Standards Board that build on existing ones, such as the SASB Standards and CDSB Framework.
  • CDP, originally founded as the Carbon Disclosure Project.
  • The Global Reporting Initiative's GRI Standards.
  • Reporting recommendations from the Task Force on Climate-Related Financial Disclosures.
  • Workforce Disclosure Initiative.

Below are some general steps to begin formulating an ESG strategy:

  1. Assemble a qualified, cross-functional team of stakeholders.
  2. Perform a business impact analysis.
  3. Perform an ESG materiality assessment to determine what is important to the company.
  4. Define measurable goals.
  5. Develop a roadmap to meet goals.
  6. Implement action plans, and report progress along the way.

Which approach is better?

ESG provides a clearer material path to business sustainability. However, a philosophy of CSR is necessary to put an ESG plan into practice. ESG might also be considered better because it involves a more comprehensively designed and measurable plan that is regulated by outside forces -- not just the company carrying out a loosely defined CSR approach. Businesses will likely need the quantitative element of ESG to comply with the EU's CSRD regulations and the SEC's climate risk disclosure rule, should it be enacted.

One place where CSR may have the advantage over ESG is in promoting elements of a corporation's sustainability goals to customers and boosting morale and engagement among employees. CSR is better for developing a company culture that empowers employees to take part in initiatives designed to have a positive social impact.

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