Mandatory UK Climate Disclosures: What Businesses Need to Know for 2027 and Beyond

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Mandatory UK Climate Disclosures: What Businesses Need to Know for 2027 and Beyond

Major Shift in UK Disclosure Rules

The UK’s Financial Conduct Authority (FCA) has proposed a landmark requirement: starting in 2027, large listed companies will be obliged to make mandatory climate-related financial disclosures under the new UK Sustainability Reporting Standards (SRS). From 2028, firms will also need to report on Scope 3 emissions—indirect emissions from their value chain—on a “comply-or-explain” basis.

This development reflects growing momentum across the UK economy to align with global net zero ambitions and enhance transparency in environmental, social and governance (ESG) practices. With investors, customers, and regulators demanding more action on climate, robust disclosure will soon become a non-negotiable part of doing business.

Who Will Be Affected?

The new rules will apply to all premium-listed and standard-listed companies, as well as large private firms meeting certain thresholds. The FCA aims to create a level playing field for businesses operating in the UK capital markets and to further integrate sustainability into financial decision-making.

  • Premium and standard-listed companies: Must provide climate-related risk disclosures from 2027
  • Large private companies: Thresholds likely based on turnover and employee numbers
  • Smaller companies: May be indirectly impacted via supply chain requirements

Scope 1, 2, and 3 Explained

Scope 1 emissions are direct emissions from owned facilities and vehicles; Scope 2 covers indirect emissions from purchased energy. Scope 3 emissions are the broadest—encompassing a company’s value chain, including suppliers, product transport, end-user product use, and waste disposal. The FCA’s scope 3 requirements will initially be on a “comply-or-explain” basis, meaning firms must either report or justify why they are not reporting.

Why These Changes Now?

The UK government and regulators are responding to two main drivers:

  • Global alignment: Keeping UK rules in step with international efforts like the International Sustainability Standards Board (ISSB) and the EU’s Corporate Sustainability Reporting Directive (CSRD).
  • Investment transparency: Investors need clear, comparable information to make climate-smart decisions and manage financial risks associated with climate change.

These changes also strengthen the UK’s position as a green finance leader as the world moves toward net zero.

How Should Businesses Prepare?

Large businesses should act now to ensure data, systems and reporting frameworks are ready for the roll-out of these regulations.

  • Undertake a climate risk assessment across operations and supply chains
  • Map Scope 1, 2, and 3 emissions with robust data collection and supplier engagement
  • Review reporting processes for alignment with ISSB and UK SRS requirements
  • Engage boards and senior management early, ensuring top-level oversight
  • Communicate changes to stakeholders—from investors to employees

Companies unable to fully report on Scope 3 emissions must provide clear rationale, with the FCA expected to tighten requirements over time.

Challenges for UK Businesses

Many companies have highlighted the difficulty of collecting high-quality, complete Scope 3 data—especially where suppliers are smaller SMEs or international. The FCA is aware of these issues, hence the initial “comply-or-explain” approach. Nonetheless, experience from large UK-listed firms already reporting on climate shows that robust supply chain engagement and the adoption of new digital tools are key to meeting the challenge.

The Business Case for Action

Effective climate disclosure is rapidly becoming a business necessity. Advantages include:

  • Improved investor confidence and access to capital
  • Mitigation of regulatory and reputational risk
  • Enhanced operational efficiency and cost savings through energy management
  • Contribution to national and global net zero targets

Conclusion

As the UK leads the way on sustainability reporting, businesses that move early will benefit most. Establishing a clear roadmap for climate risk assessment, data collection, and reporting will ensure not only compliance, but also business resilience in an era defined by climate risk. Now is the time for UK companies to build robust internal capabilities and prepare for this new ESG landscape.

The government is seeking feedback on the draft SRS, so business leaders should stay engaged and ensure their voices are heard in shaping a future-proof regulatory framework for the UK economy.