What is SECR Reporting? Complete Guide for UK Businesses

The regulatory landscape for corporate sustainability reporting in the UK has evolved significantly over the past five years. One of the most important frameworks UK businesses must understand is SECR - Streamlined Energy and Carbon Reporting. Whether you're a listed company, a large private enterprise, or an energy-intensive organisation, SECR compliance is likely a requirement for your business.

This guide walks you through everything you need to know about SECR reporting in 2026, including who must comply, what to report, key deadlines, and how to streamline the process.

Understanding SECR: Definition and Purpose

What is SECR reporting?

SECR stands for Streamlined Energy and Carbon Reporting. Introduced in the UK in 2019, SECR replaced the previous Energy Saving Opportunity Scheme (ESOS) for most organisations. It is a mandatory reporting framework that requires qualifying organisations to disclose their energy consumption and greenhouse gas emissions in their annual reports and financial statements.

SECR was designed to improve transparency around corporate energy use and carbon emissions, supporting the UK's progress toward net-zero targets. The framework encourages businesses to identify energy efficiency opportunities and take action to reduce their environmental impact.

Unlike voluntary sustainability initiatives, SECR is a legal requirement for organisations meeting specific size thresholds. This makes accurate reporting and timely compliance critical for UK businesses.

The evolution from ESOS to SECR

Before 2019, large organisations were subject to the Energy Saving Opportunity Scheme (ESOS). SECR streamlined this process, making reporting simpler and more integrated with existing financial disclosure requirements. Rather than a separate audit process, SECR requires energy and carbon data to be included directly in Director's Reports within annual accounts.

This change reduced administrative burden while maintaining accountability for corporate energy performance.

Who Must Comply with SECR?

Qualifying organisation thresholds

SECR applies to two main categories of organisations:

1. Quoted companies - Any company listed on a UK, EU, or EEA regulated market
2. Unquoted companies and Limited Liability Partnerships (LLPs) that meet at least 2 of these criteria:
   • 250 or more employees
   • Turnover of £36 million or more
   • Balance sheet total of £18 million or more

These thresholds are assessed as a group (where applicable), meaning subsidiary companies may fall under SECR obligations if their parent company qualifies.

Which organisations are exempt?

Some organisations are excluded from SECR requirements:

• Microenterprises (fewer than 10 employees and turnover/balance sheet under £2 million)
• Organisations already complying with the EU Emissions Trading System (ETS)
• Companies in administration or receivership

If you're unsure whether your organisation qualifies, it's worth reviewing your latest accounts against the size thresholds.

What Must Be Reported Under SECR?

Energy consumption and emissions data

SECR requires organisations to report:

1. UK energy use - Total energy consumption from all sources (electricity, gas, fuel oil, etc.)
2. Scope 1 emissions - Direct greenhouse gas emissions from sources owned or controlled by the organisation (e.g., fuel burned in company vehicles, natural gas in buildings)
3. Scope 2 emissions - Indirect emissions from purchased electricity and other energy supplies

Organisations must measure these using the Greenhouse Gas Protocol methodology, which ensures consistency and comparability across companies.

Data should be presented in absolute terms (tonnes of CO2e) for the entire financial year. The reporting period aligns with your financial year end, making integration with existing reporting cycles straightforward.

Intensity ratios: A critical component

Beyond absolute emissions, SECR mandates disclosure of at least one intensity ratio. This metric normalises emissions against a business metric that reflects your organisation's scale or activity level.

Common intensity ratios include:

• Emissions per employee
• Emissions per pound of revenue
• Emissions per unit of production
• Energy use per square metre of facility

Intensity ratios provide valuable context for stakeholders and help track progress over time, even as organisational size fluctuates.

SECR Reporting Deadlines and Timelines

When must you report?

The timeline for SECR reporting depends on your financial year end. Your annual report - including the SECR disclosure - must be filed within a set period after your year-end date, typically:

• 4 months for most quoted companies
• 9 months for unquoted companies and LLPs

For detailed deadlines specific to your financial year, see SECR Deadlines 2025.

Missing the deadline: Consequences

Failure to include SECR data in your annual report can result in:

• Regulatory warnings from the Financial Conduct Authority (FCA)
• Potential enforcement action
• Reputational damage
• Director liability in some cases

Early preparation and data collection systems help ensure timely, accurate reporting.

How Greenio Automates SECR Compliance

Collecting and calculating SECR data manually is time-consuming and error-prone. Greenio simplifies this process by automating energy and emissions data collection, calculation, and reporting.

Key capabilities

Greenio helps UK organisations:

• Centralise data collection - Aggregate energy consumption data from all sites and sources into a single platform
• Calculate Scope 1 and 2 emissions - Automatically compute emissions using IPCC and government conversion factors
• Generate intensity ratios - Calculate multiple intensity metrics to support strategic analysis
• Produce audit-ready reports - Export SECR-compliant disclosures ready for inclusion in your annual report
• Track progress over time - Monitor year-on-year changes and identify efficiency opportunities

By automating calculations and consolidating data, Greenio reduces the time your team spends on compliance while improving accuracy and confidence in reported figures.

FAQs on SECR Reporting

What is SECR reporting and who does it apply to?

SECR (Streamlined Energy and Carbon Reporting) is a UK legal requirement for quoted companies and large unquoted companies/LLPs meeting at least 2 of: 250+ employees, £36m+ turnover, or £18m+ balance sheet. It mandates disclosure of energy consumption and Scope 1 and 2 greenhouse gas emissions in annual reports.

What emissions must I include in SECR?

You must report UK energy consumption (all sources), Scope 1 emissions (direct emissions from owned/controlled sources like company vehicles), and Scope 2 emissions (indirect emissions from purchased electricity). All figures should be calculated using the Greenhouse Gas Protocol and reported in tonnes of CO2e.

What is an intensity ratio in SECR?

An intensity ratio normalises your emissions against a business metric such as revenue, employee count, or production volume. SECR requires disclosure of at least one intensity ratio, which provides context for your absolute emissions and helps stakeholders assess performance relative to organisational size.

When must I submit my SECR report?

Your SECR disclosure must be included in your annual report filed with Companies House. Most organisations have 4-9 months after their financial year-end to file, depending on company type. For precise deadlines aligned to your year-end, review SECR Deadlines 2025.

What happens if I miss the SECR deadline?

Missing the SECR deadline can result in regulatory warnings from the FCA, enforcement action, reputational damage, and potential director liability. Early data collection and automated reporting systems help ensure timely, compliant submissions.

Connecting SECR to Broader Carbon Accounting

SECR reporting is one component of a comprehensive corporate carbon accounting strategy. Understanding how SECR fits within the wider UK regulatory environment - including emerging standards like CSRD applicability and sector-specific guidance - helps organisations build resilient sustainability programmes.

For more context on carbon accounting frameworks in the UK, see Carbon Accounting in the UK.

Key Takeaways

SECR is a mandatory reporting requirement for UK quoted companies and large unquoted organisations. It demands transparent disclosure of energy consumption and Scope 1 and 2 emissions, supported by at least one intensity ratio. Meeting SECR deadlines is critical to avoid regulatory consequences and maintain stakeholder trust.

By implementing automated carbon accounting solutions like Greenio, organisations can streamline data collection, ensure accuracy, and focus resources on identifying and executing emissions reduction initiatives. In 2026, robust carbon accounting infrastructure is no longer optional - it's essential for regulatory compliance and business resilience.