FCA Replaces TCFD-Aligned Rules with UK Sustainability Reporting Standards
Listed companies in the UK face a significant shift in how they report climate and sustainability information to investors. The Financial Conduct Authority has confirmed new rules that replace the existing climate disclosure regime with a broader framework covering environmental, social and governance risks that could affect financial performance.
From 2027, companies will need to report under UK Sustainability Reporting Standards. These standards expand reporting beyond climate to include other material sustainability issues. However, the FCA has adopted a comply or explain approach rather than imposing strict mandatory requirements across the board.
For smaller businesses outside the listed company regime, the change matters because it signals where corporate reporting expectations are heading. Supply chain requirements, tender criteria and investor pressure often flow down from listed company obligations. Understanding the new framework helps you anticipate what clients and stakeholders may soon expect from your own business.
UK Sustainability Reporting Standards replace TCFD framework
The FCA introduced climate disclosure rules in 2021 based on recommendations from the Task Force on Climate-related Financial Disclosures. Those rules required listed companies to report on climate governance, strategy, risk management and emissions metrics. The regime improved consistency but focused solely on climate-related risks.
TCFD formally disbanded in 2023 after completing its work. Responsibility for global sustainability reporting standards passed to the International Sustainability Standards Board, created in 2021 to address fragmented reporting practices worldwide. The UK has now endorsed the ISSB framework with minor amendments to create UK-specific standards.
UK SRS S1 sets out general requirements for sustainability-related financial disclosures. It requires companies to identify and report on sustainability matters that could reasonably affect cash flows, access to finance or cost of capital. UK SRS S2 focuses specifically on climate-related disclosures, including greenhouse gas emissions and climate risks.
The government describes these as UK versions of IFRS S1 and IFRS S2. Amendments have been kept minimal to preserve international comparability. This matters for multinational companies that need to report across different jurisdictions without preparing entirely separate documentation.
Comply or explain model applies to climate and sustainability reporting
Under the final rules, in-scope listed companies must generally report in accordance with both UK SRS standards. Alternatively, they must explain clearly why they have not done so. The FCA extended this approach across the entire framework following consultation feedback.
For climate disclosures under UK SRS S2, companies must either provide the required information or identify which requirements have not been met. They must explain the reasons and describe steps being taken to enable future reporting. Generic statements about data limitations will not satisfy the disclosure obligation.
For wider sustainability disclosures under UK SRS S1, companies must either report on material sustainability-related risks and opportunities or explain which matters have not been disclosed and why. Where appropriate, a company may state that it has not identified material sustainability-related risks or opportunities.
This represents a broader approach than the FCA initially proposed. Early consultation suggested mandatory climate disclosures under S2 with comply or explain limited to wider sustainability matters and Scope 3 emissions. Following industry feedback, the FCA extended flexibility across the regime while maintaining accountability through explanation requirements.
The FCA stated the approach balances consistent, decision-useful information for investors against proportionality, market readiness and competitiveness concerns. Companies cannot simply opt out of reporting. They must explain their assessment, data limitations and implementation plans in sufficient detail for investors to understand the position.
Reporting begins in 2028 with transitional reliefs available
The new rules apply to accounting periods beginning on or after 1 January 2027. Consequently, the first reports under the regime are expected in 2028, depending on each company's financial year-end. Listed companies already subject to FCA TCFD requirements will transition to the new framework at that point.
Temporary reliefs reduce the immediate implementation burden during early reporting cycles. Companies may defer Scope 3 emissions disclosures for one year. They may defer wider sustainability disclosures under UK SRS S1 for two years. These reliefs recognise practical challenges in obtaining reliable data, particularly across complex value chains.
Scope 3 emissions depend on information from suppliers, customers, logistics providers and other parties outside direct operational control. Many businesses lack established data collection processes for these indirect emissions. Similarly, wider sustainability reporting requires new governance processes, internal controls and reporting systems that take time to develop.
During transitional periods, companies using the reliefs benefit from reduced explanation requirements for omitted information. Nevertheless, they must still demonstrate progress toward full compliance and explain the steps being taken to close data gaps.
Wider sustainability matters now require assessment and disclosure
The most significant change is expansion beyond climate reporting. TCFD focused specifically on climate governance, strategy, risk management and metrics. UK SRS S1 addresses financially material sustainability matters more broadly, requiring companies to assess which issues could affect their business model and financial performance.
Depending on the company and sector, this may include biodiversity and ecosystem impacts, water availability and water-related risks, workforce risks, human rights issues, supply chain resilience, resource dependencies and other sustainability-related matters. The standard does not require reporting on every environmental or social issue. Instead, companies must identify which risks and opportunities are material to their specific circumstances.
For example, a manufacturing business reliant on water-intensive processes may face material risks from water scarcity in operating regions. A retailer with complex global supply chains may need to consider human rights risks and supply chain resilience. A business operating in areas of high biodiversity value may face regulatory or reputational risks related to ecosystem impacts.
Materiality assessment becomes critical. Companies must evaluate which sustainability matters could reasonably affect cash flows, access to finance or cost of capital over the short, medium and long term. This requires understanding business dependencies, regulatory trends, stakeholder expectations and potential financial impacts.
The framework creates accountability through disclosure. If a company concludes that certain sustainability matters are not material, it must explain that assessment. If material matters have been identified but data is incomplete, the company must explain what information is missing, why it is missing and what steps are being taken to improve future reporting.
Five key points for businesses tracking corporate reporting changes
- UK listed companies must comply with UK Sustainability Reporting Standards or explain clearly why they have not done so from accounting periods beginning 1 January 2027.
- UK SRS S2 covers climate-related disclosures including greenhouse gas emissions, while UK SRS S1 addresses wider material sustainability risks and opportunities such as biodiversity, water, workforce and supply chain issues.
- Temporary reliefs allow companies to defer Scope 3 emissions reporting for one year and wider sustainability disclosures under UK SRS S1 for two years.
- The comply or explain model requires specific explanations of what has been omitted, why it was omitted and what steps are being taken to enable future reporting.
- The framework aligns UK reporting with International Sustainability Standards Board standards to improve international comparability for multinational companies.
Supply chain implications and SME considerations
Although these rules apply directly to listed companies, the effects will extend through supply chains. Listed businesses will need data from suppliers to report Scope 3 emissions accurately. This creates pressure on SMEs to measure and share carbon data even when not legally required to do so themselves.
Similarly, wider sustainability reporting under UK SRS S1 may drive due diligence requests covering workforce practices, environmental impacts and resource dependencies. Suppliers that cannot provide credible information may find themselves at a disadvantage when contracts are renewed or tenders are issued. Building capability now positions your business for these requests.
Public sector suppliers already face carbon reporting requirements under Procurement Policy Note 06/21. That regime requires suppliers bidding for contracts above certain thresholds to publish carbon reduction plans. The UK SRS framework reinforces the trajectory toward routine sustainability disclosure across commercial and public sector procurement.
For businesses considering net zero commitments, carbon reporting compliance support can help establish the data systems and governance processes needed to meet both internal targets and external disclosure requests. Early preparation reduces disruption when client requirements change.
What this means for smaller businesses and supply chain partners
While the FCA rules apply to listed companies, the standards they introduce will influence expectations across the wider business community. Investors, lenders, insurers and corporate customers increasingly use sustainability information to assess risk and allocate capital. This creates indirect pressure on unlisted businesses to adopt similar reporting practices.
Banks and investors are starting to request climate and sustainability information from mid-sized businesses as part of lending and investment decisions. Trade credit insurers may factor environmental and social risks into coverage terms. Corporate customers conducting supply chain due diligence will ask for evidence of emissions measurement, environmental management and social practices.
Understanding the UK SRS framework helps you anticipate these requests. Consequently, you can start building the internal processes needed to respond credibly. This includes establishing carbon measurement processes, identifying material sustainability risks specific to your sector and developing governance structures to oversee sustainability matters.
For businesses new to carbon reporting, ESG compliance and carbon reporting services provide practical support for establishing measurement and disclosure processes. Training through sustainability skills development programs can build internal capability to manage reporting requirements over time.
Action now reduces future costs. Businesses that wait until clients demand information will face compressed timelines, higher consultancy costs and potential loss of commercial opportunities. Building capability incrementally allows you to spread costs and embed sustainability considerations into business planning.
Governance and data systems required for credible reporting
Credible sustainability reporting requires robust governance, internal controls and data systems. Listed companies will need board oversight of sustainability matters, clear accountability for data collection and reporting, and integration between sustainability disclosures and financial reporting processes. These requirements offer useful guidance for any business developing its approach.
Governance starts with identifying who is responsible for sustainability matters at board and management level. This includes defining reporting lines, setting objectives and ensuring sustainability risks are considered in business planning and risk management processes. Effective governance also involves stakeholder engagement to understand which sustainability matters are material to different groups.
Data systems must capture information reliably across operations and, for Scope 3 emissions and supply chain matters, beyond direct operational control. This requires engaging suppliers, establishing data collection protocols and implementing verification processes to ensure accuracy. Many businesses find that existing financial and operational reporting systems need adaptation to capture sustainability data effectively.
Internal controls ensure that reported information is accurate, complete and prepared consistently over time. This includes documenting methodologies, maintaining audit trails and implementing review processes before publication. As sustainability disclosures become subject to assurance requirements, robust internal controls reduce the risk of material misstatement.
The FCA's transitional reliefs acknowledge that building these systems takes time. However, investors and other stakeholders will expect clear evidence of progress. Explanations that merely cite data limitations without demonstrating concrete steps toward improvement will not satisfy disclosure obligations or stakeholder expectations.
International alignment and comparability benefits
The UK's decision to base its standards on ISSB requirements supports international comparability. Many jurisdictions are adopting or considering ISSB standards, creating the potential for more consistent sustainability reporting globally. This reduces the burden on multinational companies that previously faced different requirements in each market.
For UK businesses operating internationally, alignment with ISSB standards may simplify reporting across jurisdictions. Instead of maintaining entirely separate processes for different markets, companies can use a common framework with local adaptations where necessary. This reduces costs and improves consistency in how sustainability information is presented to global stakeholders.
However, complete harmonisation remains some way off. Different jurisdictions are adopting ISSB standards at different speeds and with varying levels of mandatory application. The European Union's Corporate Sustainability Reporting Directive, for example, takes a different approach with more prescriptive requirements covering a broader range of topics. UK businesses with EU operations will still need to navigate multiple frameworks.
Nevertheless, the direction of travel is clear. Sustainability reporting is moving from voluntary, fragmented disclosure toward structured frameworks designed for capital market decision-making. The UK's approach positions listed companies to meet evolving investor expectations while contributing to the development of global reporting standards.
Where to find detailed guidance and regulatory information
The Financial Conduct Authority provides detailed information on the new listing rules and compliance requirements. Visit the FCA website for policy statements, consultation feedback and technical guidance on UK SRS implementation.
The UK government published the UK Sustainability Reporting Standards following endorsement of IFRS S1 and IFRS S2. Full text of the standards and supporting materials are available through the Department for Business and Trade.
The International Sustainability Standards Board provides comprehensive resources on IFRS S1 and IFRS S2, including implementation guidance, educational materials and updates on global adoption. These materials are available on the IFRS Foundation website.
For businesses considering broader sustainability reporting preparation, the Institute of Environmental Management and Assessment offers professional guidance on environmental risk assessment and management systems that underpin credible disclosure.