UK SRS S1 Timeline: 2026 Standard, the FCA's Final 2027 Rules and What Companies Should Do Now

The most important completed event is the publication of final UK SRS S1 and S2. This created an authoritative UK reporting basis for voluntary use. It did not itself determine which entities must report.

UK SRS S1 contains the general architecture:

objective and primary-user focus;

identification of sustainability-related risks and opportunities;

investor-focused materiality;

reporting entity and connected information;

governance, strategy, risk management, and metrics and targets;

sources of guidance;

location and timing;

comparatives and compliance;

judgements, measurement uncertainty and errors; and

application and transition provisions.

A voluntary reporter can choose its first reporting period, but it cannot selectively ignore requirements while making a compliance claim. The same-time reporting requirement in paragraph 64 applies because the first-year delayed-publication relief in IFRS S1 was removed from UK SRS S1.

During 2026, companies need to distinguish the new voluntary standard from existing requirements.

Listed issuers within the current UKLR climate framework continue to apply the FCA's TCFD-aligned rules for accounting periods beginning before 1 January 2027. Specified large companies and LLPs continue to apply the 2022 climate-related financial disclosure regulations. Sector-specific and pension reporting duties may also apply.

The publication of UK SRS does not suspend or replace those obligations automatically. The practical response is a controlled bridge:

1. map current TCFD or company-law disclosures to UK SRS S1 and S2;

2. identify new requirements, especially non-climate S1, financial effects, industry information, controls and compliance statements;

3. retain the current legal reporting basis until the applicable rule changes; and

4. design data and governance processes that can support both current and future reporting during the transition.

The FCA published its final rules in PS26/19 on 30 September 2026, following its CP26/5 consultation. This is the highest-priority regulatory change for listed-company planning, and plans built on the proposal need a controlled update.

The implementation team should update at least the following within a defined review window:

in-scope listing categories (UKLR 6, 14, 15, 16 and 22);

the comply or explain basis across S1 and S2, which replaces the mandatory climate core proposed in CP26/5;

the treatment of UK SRS S1 non-climate reporting;

the treatment of Scope 3 under UK SRS S2;

transitional relief durations and how their use is stated;

report location in the annual financial report and cross-reference rules;

explanation wording: what has not been met, why, and any planned steps;

the transition-plan and assurance statements;

application to accounting periods beginning on or after 1 January 2027;

TCFD-aligned reporting for earlier periods and the early-adoption option; and

interaction with UK SRS compliance statements, including the Technical Note 803.1 consultation.

The update should be completed through a controlled change log, not by editing the annual-report draft informally.

PS26/19 applies to accounting periods beginning on or after 1 January 2027. The distinction between that date, the reporting-period start and the publication date matters.

A company with a 31 December year-end enters the regime for the year beginning 1 January 2027. Its first annual report under the new rules is normally published in 2028.

A company whose accounting period begins on 1 April 2027 is also in the first cohort. Its first report under the new rules would normally appear in 2028.

An issuer with a period beginning before 1 January 2027 may continue applying the existing TCFD-aligned rules for that period, or voluntarily adopt UK SRS under the FCA's early-adoption provisions.

The project deadline is therefore not the publication date of the annual report. Materiality, value-chain work, data design, controls and board oversight need to operate during or before the reporting period.

The final UK SRS S1 climate-only provision has no fixed period in the standard itself. Where UK law or regulations require application, its availability is subject to those rules.

PS26/19 allows listed issuers a two-year climate-first relief for non-climate S1 information, covering periods beginning in 2027 and 2028:

A company using the climate-only provision cannot assert UK SRS S1 compliance and must disclose its use. More generally, neither a relief nor an explanation automatically supports an unreserved UK SRS compliance statement.

The government's work on non-listed entities sits within the Modernising Corporate Reporting programme. Its consultation, published on 7 September 2026 and closing on 30 November 2026, says the government will consider how UK SRS should be reflected in the Companies Act in the light of responses, alongside simplification of the annual report and existing non-financial reporting requirements.

The key point for timeline planning is that no company-law timetable exists: the consultation proposes no thresholds and no commencement dates for private-company application. A future process would still require a policy response, legislation or regulations, implementation guidance and transition arrangements.

Private and unlisted groups should maintain separate update triggers for:

the government response to the Modernising Corporate Reporting consultation;

any proposed scope for UK SRS application;

scope thresholds and group exemptions;

strategic-report or other location requirements;

relationship with current climate disclosures, SECR and the non-financial and sustainability information statement;

assurance expectations;

commencement and transition periods; and

treatment of voluntary reports prepared before the law changes.

Create a one-page regulatory map identifying current duties, voluntary choices, PS26/19 exposure, possible Companies Act exposure, sector rules and contractual requests. Assign an owner and review date to each item.

Confirm the financial-statement reporting entity, reporting period, authorisation timetable and intended location. Identify whether current sustainability reporting has a different boundary or publication date.

Expand beyond climate. Use business-model, value-chain, dependency, impact, risk-management, strategic and external data to identify sustainability-related risks and opportunities affecting prospects.

Document primary-user decisions, nature and magnitude, timing, likelihood, concentrations, financial effects and qualitative factors. Link each material matter to revenue, costs, assets, liabilities, cash flows, financing or capital allocation where applicable.

For each material matter, map governance, strategy, risk management, metrics and targets. Identify the dedicated S2 requirements for climate and entity-specific requirements for other topics.

Build a data dictionary, evidence register, methodology controls, reconciliations, review workflow and issue-management process. Align key deadlines with the financial close.

Pre-agree the hierarchy of possible statements: full S1 compliance, S2 compliance with disclosed reliefs, regulatory comply-or-explain reporting, partial alignment or voluntary use without a compliance claim. Obtain legal and technical review before final approval.