For most UK small businesses, sustainability reporting is a commercial choice rather than a blanket legal requirement. Customers and lenders may still ask for environmental, social and governance (ESG) information. Start by checking which rules actually apply to your business.
What changed in 2026?
The EU narrowed the scope of its Corporate Sustainability Reporting Directive (CSRD). The revised EU framework generally targets companies with more than 1,000 employees and net annual turnover above €450 million. For non-EU groups, separate rules consider EU turnover and the presence of a qualifying EU subsidiary or branch. Exporting to the EU alone does not make a UK small business subject to the CSRD.
Application dates, group exemptions and national implementation matter. Check the Council’s explanation of the 2026 changes before assuming your business is in scope. Businesses that are covered report under the European Sustainability Reporting Standards (ESRS), which are also being simplified.
What are the UK requirements?
The government published final UK Sustainability Reporting Standards (UK SRS S1 and S2) in February 2026 for voluntary use. Their publication does not, by itself, require every UK company to report.
The FCA has introduced UK SRS reporting requirements for specified categories of listed companies for accounting periods beginning on or after 1 January 2027. Its current reporting guidance explains the scope and transition from existing climate disclosures.
Separate UK climate-related financial disclosure rules already apply to certain companies and LLPs. Employee numbers alone do not determine scope: entity type, turnover and group conditions can also matter.
Why might a small business be asked for ESG data?
A customer may need supplier information for its own reporting, or a lender may ask about energy costs and climate risks. These requests are different from a direct legal obligation to publish a sustainability report. Ask what information is needed, how it will be used and whether a proportionate response is acceptable.
The European Commission’s reporting guidance and voluntary standards updates can help businesses choose a suitable framework. Avoid commissioning an extensive report before checking the actual requirement.
A practical starting point
- Keep energy bills, fuel records and relevant travel data together.
- Define which sites, activities and reporting period your figures cover.
- Document calculation methods and any estimates.
- Choose a small number of measurable actions, with an owner and timescale.
- Support environmental claims with evidence and explain limitations clearly.
Reliable records can help you answer customer questions and assess potential savings. They do not guarantee funding, contracts or regulatory compliance.
Our sustainability support can help you assess reporting needs and organise the financial and operational information behind them. For a related practical guide, see how to measure your business carbon footprint.
Book an introductory call to discuss a proportionate approach for your business.
Reviewed and updated: 24 October 2026. Requirements depend on your circumstances and may change.
