ESG reporting requirements UK — SECR, UK SRS, TCFD, ESOS
ESG reporting requirements UKare not one regime — they are four overlapping mandatory frameworks. SECR for ~11,900 large companies since 2019. UK SRS S2 proposed mandatory for ~500 listed companies from 1 January 2027. TCFD via UKLR and SI 2022/31 for listed companies and large pension funds. ESOS Phase 4 energy audits due 5 December 2027.
ESG reporting requirements UK — the four-framework picture
ESG reporting requirements UK are delivered through four overlapping mandatory frameworks, not one. SECR + UK SRS + TCFD + ESOS together cover energy, carbon, climate, governance, transition planning and energy efficiency.
ESG reporting requirements UK is the umbrella term for the corporate disclosure obligations that catch large and listed UK companies. There is no single “UK ESG report” in statute — instead the requirements come from four separate frameworks, each with its own scope test, content rules and deadlines. Together they cover energy and carbon (SECR), climate-related financial disclosure (TCFD via UKLR and SI 2022/31, transitioning into UK SRS S2), wider sustainability disclosure (UK SRS requirements), and energy-efficiency assessments (ESOS Phase 4).
Most large UK groups are caught by at least two of the four. Companies in scope of UK SRS who is in scopealmost always also report under SECR (size threshold) and TCFD (UKLR). Knowing exactly which frameworks apply is the first step in scoping a UK ESG reporting programme — the second is mapping the data overlap so one inventory feeds multiple disclosures.
The four UK mandatory frameworks
Side-by-side: what each framework asks for, who it catches, when it bites. Built from the four primary instruments.
UK ESG reporting requirements — how to test scope
Different tests for each framework. Run through them in order to map which UK ESG reporting requirements your group is subject to.
- Are you a UK Main-Market-listed equity? Test 1
- If yes, you are in UKLR 6 (or 16/22 for funds) and within scope of TCFD-via-UKLR today and proposed UK SRS S2 from 2027. You are almost certainly also subject to SECR through the quoted-company route, regardless of size. See /uk-srs-who-is-in-scope.
- Do you meet two of three Companies Act 'large' tests? Test 2
- More than 250 employees, £36m+ turnover, £18m+ balance sheet. If yes, SECR applies and SI 2022/31 TCFD likely applies. UK SRS S1 may apply from 2029 on a comply-or-explain basis subject to DBT consultation.
- Are you energy-intensive or meet the ESOS test? Test 3
- ESOS Phase 4 applies to UK undertakings meeting the large-undertaking test or breaching the energy-use threshold. Calculation rules are in the ESOS Regulations 2014 and 2023 Amendment Regulations.
- Are you a UK pension fund or local government scheme? Test 4
- Large authorised pension schemes are caught by TCFD-aligned regulations under DWP rules (separate from FCA). Scope tests apply at scheme level rather than sponsor level.
- Do you have material EU operations? Test 5 (CSRD risk)
- If your group has €450m+ EU turnover at Article 40a, or an in-scope EU subsidiary, EU CSRD reporting bites in addition to UK ESG reporting requirements. See /csrd-vs-uk-srs.
UK ESG reporting deadlines through 2029
Five anchor dates: ESOS action plan progress updates 2026, UK SRS publication 2026, mandatory UK SRS S2 2027, ESOS Phase 4 close 2027, broader UK SRS S1 comply-or-explain 2029.
The pinch year
2027 is the pinch year for UK ESG reporting.
UK SRS S2 mandatory start (proposed 1 Jan) and ESOS Phase 4 compliance deadline (5 Dec) both land in the same calendar year, with the first full UK SRS reporting cycle for FY 2027 due in 2028.
Companies in scope of both regimes should sequence data architecture work in 2026 to avoid a Q4 2027 crunch.
What data feeds which framework
Most data points serve multiple frameworks. Build one inventory; let it feed all four reports. This is where the cost savings live.
- Scope 1 emissions (tCO2e) Feeds: SECR, UK SRS S2, TCFD
- DESNZ conversion factor-based Scope 1 from fuel combustion, owned vehicles and process emissions. Identical data feeds the SECR directors' report block, the UK SRS S2 metrics-and-targets pillar, and the TCFD strategic-report disclosure.
- Scope 2 emissions (tCO2e) Feeds: SECR, UK SRS S2, TCFD
- Location-based primary, market-based supplementary. Same data, same calculation, three disclosures.
- Total energy consumption (kWh) Feeds: SECR, ESOS
- Total UK energy use across electricity, gas, transport fuels. Same underlying metering data feeds SECR's energy block and ESOS Phase 4's audit scope.
- Climate scenarios + transition plan Feeds: UK SRS S2, TCFD
- Two or more climate scenarios (typically a 1.5°C aligned and a 3°C+ scenario), tested against the business model. Transition plan describing decarbonisation pathway and capital allocation. Same content satisfies UK SRS S2 strategy pillar and TCFD strategy disclosure.
- Board governance log Feeds: UK SRS S1/S2, TCFD, ESOS
- Documented board oversight of climate and sustainability risks, including committee charters, meeting frequency and management accountability. All four frameworks demand evidence of board engagement.
- Energy-efficiency measures narrative Feeds: SECR, ESOS
- Description of energy-efficiency measures undertaken in the reporting period plus quantified savings where feasible. Same narrative satisfies SECR's mandatory disclosure and ESOS Phase 4's action-plan content.
Most ESG reporting requirements UK ask for the same data — the trick is one inventory, four reports, not four inventories.
UK ESG architecture analysis · June 2026
The implication: a serious UK ESG reporting programme starts with a unified data model spanning energy, emissions, governance, transition plan and assurance evidence. Cloud-based carbon reporting tools increasingly bundle SECR, UK SRS and ESOS templates so that the same source data feeds multiple disclosures.
UK ESG requirements and the small-supplier squeeze
UK SMEs are outside the mandatory regimes today but face indirect pressure through value-chain requests from larger UK and EU customers.
UK SMEs are notdirectly captured by SECR, UK SRS, TCFD-via-UKLR or ESOS. The size and listing tests on each framework target large or listed entities. In practice, however, UK SMEs face indirect ESG reporting through value-chain data requests from larger customers who are in scope — especially where the customer is itself caught by EU CSRD via a UK-EU group consolidation or Article 40a.
Satisfying UK ESG reporting requirements with one architecture
The cheapest path to compliance is a single ESG data architecture feeding SECR, UK SRS, TCFD and ESOS in parallel. Most large-firm advisers price the integrated approach 30–40% lower than running each separately.
ESG reporting requirements UK — frequently asked
The six questions that come up most often when scoping a UK ESG reporting programme.
What are the ESG reporting requirements in the UK in 2026?
The UK ESG reporting requirements consist of four mandatory frameworks operating in parallel: SECR (Streamlined Energy and Carbon Reporting) for ~11,900 large companies and LLPs since 2019; UK SRS S2 climate disclosures proposed mandatory for ~500 UK-listed companies from 1 January 2027 under FCA CP26/5; TCFD-aligned disclosures via the UK Listing Rules and the Climate-related Financial Disclosure Regulations 2022 (SI 2022/31); and ESOS Phase 4 energy audits due 5 December 2027.
Most large UK groups are caught by at least two.
Are ESG reporting requirements UK mandatory?
SECR, TCFD-via-UKLR and ESOS are already mandatory for in-scope companies.
UK SRS S2 is proposed mandatory from January 2027 subject to the FCA Policy Statement expected autumn 2026; UK SRS S1 is currently voluntary with broader comply-or-explain proposed from 2029.
Voluntary adopters can apply UK SRS S1 and S2 now under early-adoption provisions.
Who is in scope of UK ESG reporting requirements?
Each framework has its own scope test.
SECR catches ~11,900 large UK companies, LLPs and quoted companies meeting two of three size tests (250+ employees, £36m+ turnover, £18m+ balance sheet).
UK SRS S2 (proposed) catches ~500 listed companies in UKLR categories 6, 16 and 22.
TCFD-via-UKLR covers commercial companies in those same UKLR categories plus large pension funds.
ESOS Phase 4 catches energy-intensive organisations meeting employee or financial thresholds.
Do UK SMEs have to comply with ESG reporting requirements?
Not under current UK mandatory regimes.
SECR exempts small companies (under the Companies Act 'large' test).
UK SRS, TCFD and ESOS are all targeted at large or listed entities.
UK SMEs may face indirect ESG data requests as suppliers to in-scope customers, especially where the customer is caught by EU CSRD via UK group consolidation or Article 40a.
Voluntary adoption is encouraged through the FRC SME guidance and the VSME (Voluntary SME) standard for EU-customer relationships.
How do the UK ESG reporting requirements interact with EU CSRD?
EU CSRD does not apply directly to UK-domiciled entities post-Brexit.
UK companies can be caught indirectly through four routes: (1) UK subsidiary of an in-scope EU parent, (2) UK parent group with €450m+ EU turnover under Article 40a (from FY 2028), (3) UK company with EU regulated-market listing, (4) value-chain data requests from in-scope EU customers.
A UK company already preparing UK SRS S2 covers most of the climate overlap with ESRS E1, but ESRS demands broader double-materiality and a wider ESG scope.
What's the cheapest way to satisfy all UK ESG reporting requirements?
Build one consolidated data architecture — group emissions inventory, governance log, transition plan — and let it feed multiple disclosures.
SECR for the directors' report, UK SRS for the annual sustainability statement, TCFD for the strategic report (often cross-referenced to UK SRS), ESOS for the Environment Agency notification.
Most platform vendors and large-firm advisers price integrated UK ESG reporting at 30–40% less than running each framework separately.
Each framework in depth
Drill into the dedicated page for each of the four UK ESG reporting frameworks.
UK SRS S1 + S2
The proposed mandatory UK sustainability reporting standards from 2027.
CarbonSECR reporting guide
The UK's foundational mandatory energy + carbon disclosure regime.
ClimateTCFD UK requirements
TCFD-aligned disclosure under UKLR and SI 2022/31, converging into UK SRS S2.
EnergyESOS Phase 4
Energy-efficiency audits and the 5 December 2027 deadline.
Related guides & references
UK sustainability reporting hub
The wider site hub covering UK SRS, SECR, ESOS and TCFD in one place.
What is UK SRS — S1 and S2 explained
The proposed mandatory standards from 2027.
SECR compliance guide
The UK's foundational mandatory carbon and energy reporting regime.
CSRD vs UK SRS
Where EU CSRD catches UK groups and how to satisfy both with one architecture.