Corporate sustainability reporting is the practice of publishing structured information on a company’s social and environmental risks and impacts. In the EU it is governed by the Corporate Sustainability Reporting Directive (CSRD), as the European Commission describes.
The directive sits within the wider field of ethical business, where reporting is one of the main ways a company shows what it does rather than only what it says. This guide is general information about how the rules work, not legal or compliance advice, and the rules have changed repeatedly, so every date and scope statement below is given “at the time of writing” and should be checked against the official pages linked in the text.
What sustainability reporting covers
A sustainability report is not a brochure. According to the Commission, EU rules require large companies and listed companies to publish regular reports on the social and environmental risks they face, and on how their activities affect people and the environment. The aim is to give investors, civil society organisations, consumers and other stakeholders a consistent basis for judging a company’s performance.
For a clothing business that can mean disclosures on energy use, chemicals, waste, working conditions and how suppliers are managed. The directive’s own recitals say that information on human rights should include information about forced labour and child labour in their value chains where relevant. That is why garment and textile companies, whose production is spread across many countries, are a frequent example when the rules are discussed.
Reporting differs from a certification or label. A certifier checks a product or a site against a fixed standard, while a sustainability statement describes the whole company, its strategy and its risks. The two can support each other, but neither replaces the other.
From the old non-financial rules to the CSRD
Before the CSRD, large companies followed the Non-Financial Reporting Directive, usually shortened to NFRD. The Commission’s timeline records that the CSRD was proposed to amend the reporting requirements of the NFRD. The result was Directive (EU) 2022/2464, which widened the information required and tied it to common standards.
The earlier regime left companies a great deal of freedom over what to disclose and how, which made reports hard to compare. The CSRD’s recitals argue that there is a need for common standards so that information is comparable and so that business partners, including customers, might rely on sustainability information to understand their own risks and impacts along their value chains. In practice this means a small supplier may be asked for data by a large customer even when the supplier is not itself covered by the directive.
Double materiality and the ESRS
The central idea is double materiality. The directive’s recitals describe reporting on both the impacts of a company on people and the environment and on how sustainability matters affect the company, which is referred to as the double materiality perspective. A company therefore asks two questions: what does its activity do to the world, and what could the world do to its finances.
The detail sits in the European Sustainability Reporting Standards, or ESRS. The Commission states that companies subject to the CSRD have to report according to these standards, and that the draft versions are produced by EFRAG, an independent body bringing together various stakeholders. EFRAG itself says it provides technical advice to the European Commission in the form of draft ESRS. The standards were adopted by the Commission as a delegated act, listed on the same Commission page as Delegated Regulation (EU) 2023/2772.
A company does not have to report on every topic in the standards. It runs a materiality assessment and discloses on the topics that turn out to be relevant, and it explains how it reached that list. This is why two clothing companies of similar size can publish quite different statements.
Who reports and when the dates moved
The original timetable was phased by size. The recitals of the later postponement directive describe how large public-interest entities with more than 500 employees on average during the financial year were to report first, followed by other large companies and then by listed small and medium-sized companies. The same text shows that the dates were moved by Directive (EU) 2025/794, which says the requirements for the later groups should be postponed by two years.
The Commission’s page calls this the “stop-the-clock” directive and explains that it postpones the entry into application of the reporting requirements for companies previously due to report for the first time for financial years 2025 or 2026, referred to as wave two and wave three. The same directive also amends the date rules for the due diligence directive, Directive (EU) 2024/1760, which is covered in the guide to supply chain due diligence.
Scope has since been narrowed. The Omnibus I simplification package was adopted as Directive (EU) 2026/470, which the Commission says was published in the Official Journal on 26 February 2026. Its recitals say that individual sustainability reporting should be limited to undertakings with a net turnover exceeding EUR 450 million and an average of more than 1,000 employees during the financial year, and member states must bring the reporting changes into national law by 19 March 2027. National law sets the exact dates, so the current thresholds should be read from the Commission page, the Official Journal and the national text rather than from summaries, including this one.
Simplified standards and the voluntary route for smaller firms
The standards themselves have been revised. The Commission records a “quick-fix” delegated act whose revision gives additional flexibility in reporting to wave one companies, and further delegated acts on the simplification of certain reporting standards.
For smaller businesses, including independent fashion labels that fall outside the mandatory scope, the Commission lists a recommendation on a voluntary sustainability reporting standard for small and medium-sized undertakings (VSME). It offers a lighter structure that a small company can use to answer customer or bank questionnaires with a single, consistent set of disclosures instead of replying to each request separately.
Assurance and reliability
A report is only useful if readers can trust it. The directive’s recitals discuss external checking of sustainability information and explain that the assurance profession distinguishes between limited assurance engagements and reasonable assurance engagements, with a limited engagement involving fewer tests and a conclusion framed in negative form.
For readers, assurance is a signal, not a guarantee of good performance. A well-assured report can still describe a weak result, and an unassured one can describe a strong result. Comparing what a company reports against what it claims in advertising is also one way to spot greenwashing.
Reading a sustainability statement as a shopper or small business
A few habits make these documents easier to use. Check which standard the report follows and whether it names the topics judged material. Look for targets with a base year and a method rather than adjectives. See whether supply chain information goes beyond the first tier of suppliers, because that is where much of a garment’s impact arises. Finally, note the reporting period and whether the company is describing a plan or a result.
Small businesses that receive questionnaires from larger customers can treat them as a preview of what the large company must disclose. Keeping records of materials, suppliers and energy use in an organised way makes it easier to answer, whether or not the business is itself in scope.
Frequently asked questions
Is the CSRD the same as the ESRS?
No. The CSRD is the directive that sets out who must report and what reporting must cover, while the ESRS are the detailed standards that companies use to prepare the report.
Does a small clothing brand have to publish a sustainability report?
That depends on its size and legal form, and the scope was narrowed in 2026, so the current Commission page and national law should be checked. A small brand outside the mandatory scope may still use the voluntary VSME approach.
What does double materiality mean in simple terms?
It means a company looks at its effect on people and the environment and also at how sustainability issues could affect the company itself.
Is a sustainability report the same as a certification?
No. A certification checks a product or site against a fixed standard, while a sustainability report describes the whole company, its risks and its approach.
