Am I in scope of UK SRS?
A practical decision tree walking through the rules in CP26/5, the Companies Act, and the proposed mandatory framework. UK SRS itself is available for voluntary adoption by any UK entity — the question of mandatory application is jurisdiction-specific.
Last verified 27 July 2026 · Subject to FCA Policy Statement on CP26/5, unpublished as of that date
Outcome categories
Most SMEs in the UK are not subject to mandatory sustainability reporting requirements.
That does not make the subject irrelevant: an SME in a large company's supply chain is routinely asked for the same data, and the wider landscape of sustainability reporting is where those requests originate.
However, there are some exceptions and voluntary opportunities:
Current mandatory requirements for SMEs
SECR (large SMEs only): the SECR size test is drafted as an exemption, so a company is in scope where it exceeds at least two of £36m turnover, £18m balance sheet total and 250 employees, and must then comply with SECR.
Quoted companies are in scope regardless of size.
Note that these thresholds were not uprated by the April 2025 Companies Act size changes, so a company reclassified as medium-sized for accounts purposes can still be caught by SECR.
Directors' Report disclosure: Large companies must include energy and carbon information in their Directors' Report,
including UK energy consumption and greenhouse gas emissions data.
Supply chain requirements: SMEs may need to provide sustainability data to larger customers who are subject to mandatory reporting,
especially for Scope 3 emissions calculation purposes.
Voluntary adoption opportunities
UK SRS voluntary use: Any UK entity can voluntarily adopt UK SRS S1 and S2, which were published on 25 February 2026 and are available for voluntary use immediately.
No UK SRS reporting requirement has been proposed for SMEs or for private companies of any size.
Customer requirements: Many SMEs adopt sustainability reporting to meet customer or investor expectations,
particularly when supplying large corporations subject to mandatory disclosure.
Access to finance: Some lenders and investors require ESG information from SME borrowers,
especially for sustainability-linked loans and green financing products.
Simplified approaches for SMEs
How long UK SRS S2 implementation actually takes
Companies waiting for the FCA Policy Statement to begin preparation are already late. Practitioner consensus puts end-to-end implementation at twelve to eighteen months — driven by Scope 3 data, which can't be compressed.
Last verified 27 July 2026 · Click any workstream for detail
From kickoff to first UK SRS S2 report. Driven by Scope 3 supplier engagement and quantitative scenario modelling — neither compressible.
Of Scope 3 data work — from supplier engagement onset through validation. Of the 15 GHG Protocol categories, Category 1 and Category 11 typically account for >70% of total Scope 3 emissions.
Foundation phase before data work meaningfully begins. Materiality assessment and gap analysis are pre-requisites — running data collection without these creates wasted effort.
Proportionality provisions: UK SRS includes comply-or-explain mechanisms that allow smaller entities to provide proportionate disclosures.
Building capability: SMEs can start with basic climate disclosures and build reporting capabilities over time,
beginning with Scope 1 and 2 emissions before expanding to Scope 3 assessment.
Professional support: Consider working with sustainability consultants familiar with SME compliance requirements,
including specialists in small business ESG implementation and cost-effective reporting solutions.
Planning for growth
SMEs planning expansion should consider whether growth might bring them into scope of mandatory reporting requirements.
Early adoption of voluntary standards can help build capability before requirements become mandatory.