UK ESG Reporting Requirements: Who Must Report and What's Mandatory

The UK ESG reporting requirements are not one report but a set of overlapping regimes that apply according to a company's size and whether it is listed. There is no single ESG filing every business submits; instead, rules on energy and carbon, climate risk, non-financial information, pay gaps and modern slavery each catch different organisations at different thresholds. This guide sets out who must report, what each regime demands, and how the coming ISSB-based standards are set to reshape the picture.

There Is No Single UK ESG Report

The first thing to understand is that "ESG reporting" in the UK is a bundle of separate obligations rather than one standard. A company might be caught by two or three regimes at once, or by none, depending on its headcount, turnover and balance sheet, and on whether its shares are listed. Working out your requirements means checking each regime's threshold against your own numbers, not looking for a single form. For the wider principles that sit beneath all of this, see our pillar on what business ethics is.

The Main Reporting Regimes

Streamlined Energy and Carbon Reporting (SECR)

SECR requires qualifying organisations to disclose their UK energy use, greenhouse gas emissions and an intensity metric in their annual report, alongside the energy-efficiency measures they have taken. It applies to all quoted companies, and to large unquoted companies and LLPs that meet at least two of three tests: more than 250 employees, turnover above £36 million, or a balance sheet total above £18 million. For many mid-to-large businesses, SECR is the first ESG obligation they encounter.

TCFD-aligned climate disclosures

Since April 2022, the largest organisations must make climate-related financial disclosures aligned with the Task Force on Climate-related Financial Disclosures (TCFD) in their strategic report. This applies to publicly quoted companies and to large private companies and LLPs with more than 500 employees and turnover above £500 million. These disclosures cover governance, strategy, risk management and metrics for climate-related risks and opportunities, going well beyond the emissions figures required by SECR.

The non-financial and sustainability information statement

Companies with more than 500 employees that are either listed, banks or insurers must include a non-financial and sustainability information statement in their strategic report. It covers environmental matters, employees, social and human-rights issues, and anti-corruption, along with the policies and risks attached to each. This is the closest the UK comes to a broad narrative ESG statement in law.

Pay gap and modern slavery reporting

Two further regimes sit under the social and governance side of ESG. Gender pay gap reporting applies to employers with 250 or more employees, who must publish specified pay-gap figures each year. A modern slavery statement is required of commercial organisations with turnover above £36 million, setting out the steps taken to prevent slavery and human trafficking in their operations and supply chains.

How to Work Out What Applies to You

Start with your own numbers: headcount, turnover and balance sheet total, plus whether your shares are quoted. Run those against each regime's threshold in turn. A large private company below the TCFD turnover line may still be caught by SECR and gender pay gap reporting; a listed company is likely caught by several at once. Because the tests differ, it is common to qualify for one regime and not another, so check each rather than assuming an all-or-nothing answer. The Financial Reporting Council, the UK's corporate reporting regulator at frc.org.uk, publishes guidance and thematic reviews that help interpret how these disclosures should be prepared.

What Is Changing: ISSB and UK Sustainability Reporting Standards

The direction of travel is toward a more consolidated, investor-focused framework. The UK government is developing UK Sustainability Reporting Standards based on the International Sustainability Standards Board's first two standards, IFRS S1 on general sustainability disclosures and IFRS S2 on climate. Once endorsed, these are expected to inform future UK requirements and could build on and extend today's TCFD-aligned rules. Nothing here removes current obligations, but companies already reporting under TCFD and SECR are well placed for the shift. The precise scope and timing depend on final UK endorsement decisions, so treat this as the next chapter rather than a rule already in force.

Why It Is Worth Doing Well

Treating ESG reporting as a genuine account of performance, rather than a compliance chore, pays off. Investors, lenders, large customers and prospective employees increasingly read these disclosures, and thin or defensive reporting stands out. Reporting that is honest about risks and progress builds the same trust internally that an ethical company culture depends on, and a clear code of conduct gives the governance disclosures something real to describe.

Frequently Asked Questions