FCA ESG Rating Providers: UK Regulator Launches Voluntary Reporting Pilot
ESG rating providers face their first taste of UK regulatory engagement as the FCA opens a voluntary pilot to stress-test disclosure metrics ahead of binding rules expected later this year.
The Financial Conduct Authority has taken its first direct step toward building a disclosure regime for ESG rating providers, opening a voluntary pilot on 28 April 2026 that invites firms to test proposed reporting metrics before formal rules take effect. The FCA ESG rating pilot gives providers a tight deadline, with registration closing on 13 May 2026, and signals the regulator’s intent to shape its oversight framework in collaboration with an industry that has never before faced dedicated UK regulation.
The move comes as Britain works to close a widening gap with the European Union. Brussels’ own ESG ratings regulation, supervised by the European Securities and Markets Authority, applies from 2 July 2026. ESMA has already published final regulatory technical standards covering authorisation, business separation and public disclosures, giving European providers a concrete rulebook to prepare against. The UK regime will not go live until 29 June 2028, two full years later, raising the question of whether London’s deliberate pace amounts to prudence or a missed opportunity.
The pilot sits within the broader architecture of CP25/34, the FCA’s consultation paper on FCA ESG rating regulation published in December 2025. That consultation, which closed on 31 March 2026 and drew responses from trade bodies, consumer panels, data providers and ratings firms, proposed a comprehensive regime spanning transparency, governance, conflicts of interest and systems and controls. A final Policy Statement containing binding rules is expected in Q4 2026.
The pilot will test whether proposed reporting metrics for FCA ESG rating providers are clear, feasible across different business models and proportionate in the burden they impose. The FCA wants to establish whether the data collected would prove useful for supervisory purposes rather than generating compliance paperwork that serves no practical end. Participants will feed directly into the design of the future reporting framework, and the regulator has indicated it may revise its metrics based on the feedback it receives. Data submitted through the pilot will not inform authorisation assessments, a reassurance aimed at providers wary of regulatory scrutiny during what remains a pre-implementation phase.
The groundwork for this regime stretches back to March 2023, when HM Treasury first consulted on bringing ESG ratings within the FCA’s perimeter, a move that drew 95% support from respondents. The government followed through with secondary legislation, and the Financial Services and Markets Act 2000 (Regulated Activities) (ESG Ratings) Order 2025 entered into force on 15 December 2025, formally designating the provision of ESG ratings as a regulated activity. From 29 June 2028, any firm wishing to provide certain types of ESG ratings in the UK will require FCA authorisation, with the gateway for applications opening in June 2027 and a six-month pre-gateway support period beginning in January 2027.
The scale of the market and the depth of user concerns make the case for intervention difficult to dismiss. Global spending on ESG data, including ratings, was projected to reach $2.2 billion in 2025, a figure that reflects how central these assessments have become to investment decision-making. The FCA’s own research found that 55% of users are concerned about how ratings are constructed, while 48% question the level of transparency providers offer. Major providers such as MSCI, Sustainalytics and S&P Global now assess thousands of companies globally, and their scores increasingly inform capital allocation, risk management and regulatory reporting. The FCA ESG rating framework draws on IOSCO recommendations and the industry-led ICMA Code of Conduct to maintain alignment with international standards.
Sacha Sadan, the FCA’s director of sustainable finance, said when CP25/34 launched that the proposals would build confidence in a market facing growing scrutiny.
“Our proposals will give those who use ESG ratings greater trust and confidence, supporting our goal of increasing trust and transparency in sustainable finance. This will enhance the UK’s reputation as a global sustainable finance hub, attracting investment and supporting growth and innovation.”
The regulator estimates the new rules will deliver approximately £500 million in net benefits over the coming decade, driven by improved transparency, reduced risk and more efficient decision-making across the investment chain.
Not all participants are convinced the balance has been struck correctly. The UK Sustainable Investment and Finance Association, in its response to CP25/34, called for additional proportionate measures to support smaller and specialist FCA ESG rating providers, warning that compliance costs risk disproportionately burdening firms with fewer resources. UKSIF also recommended a defined review period following the regime’s introduction and flagged that notification requirements for rated entities remain among the most challenging elements of the proposals.
Amanda Cooke, chair of the Society of Pension Professionals’ Financial Services Regulation Committee, echoed those concerns.
“Implementation must be practical, especially for smaller providers, and key concepts like ‘material changes’ need sharper definition to avoid unnecessary cost and confusion.”
Scope remains a live and unresolved question. The broad statutory definition could capture market participants that do not consider themselves rating providers, including firms offering second-party opinions, verification and assurance services. HM Treasury chose not to introduce a standalone exclusion for these activities. The legislation captures any rating likely to influence an investment decision, whether solicited or unsolicited, though firms that only distribute ratings produced by others fall outside the perimeter. The FCA has committed to publishing detailed guidance, but until that clarity arrives, parts of the market face genuine uncertainty about where they sit.
The voluntary pilot is the FCA’s attempt to build its FCA ESG rating oversight through sustained engagement rather than top-down imposition. By drawing providers into the process now, the regulator aims to strip out unnecessary reporting burden while equipping itself with the supervisory tools needed to monitor a fast-evolving sector. The pilot does not signal final policy. A separate formal consultation on the reporting regime will take place before any rules enter the Handbook.
The broader trajectory is clear. Global ESG assets under management reached approximately $39 trillion in 2025, and the wider ESG finance market is projected to grow from $8.7 trillion to $16.5 trillion by 2031. The rating providers whose assessments help direct these capital flows have until now done so without any dedicated regulatory framework in the UK. That is about to change. The proposed rules are designed to be proportionate to business size and risk, with the FCA drawing a threshold for larger providers at a forecast annual revenue of £250,000 or more.
Whether London’s measured approach strengthens its claim as the world’s leading sustainable finance capital, or whether the two-year lag behind Brussels proves costly, will depend on what providers and the regulator build together in the months ahead. Registration closes on 13 May 2026. Interested firms should contact esgratingspolicy@fca.org.uk.
