ESOS vs SECR: What’s the difference for UK businesses?

The Energy Savings Opportunity Scheme (ESOS) focuses on assessing energy consumption and identifying energy-saving opportunities within qualifying organisations. Streamlined Energy and Carbon Reporting (SECR) focuses on annual disclosure of energy use, greenhouse gas emissions and related information.

For businesses that fall within scope, understanding the difference between ESOS vs SECR is important because complying with one does not automatically mean the requirements of the other have been met.

Key takeaways

• ESOS is an energy assessment scheme designed to identify energy-saving opportunities.
• SECR requires qualifying businesses to report specified energy and carbon information within their annual reports.
• Some businesses may fall within the scope of both schemes, meaning the requirements need to be considered separately.

What is ESOS?

ESOS is a mandatory energy assessment scheme for qualifying UK organisations.

For ESOS Phase 4, an organisation generally qualifies as a large undertaking if it employs 250 or more people, or exceeds both the applicable annual turnover and balance sheet thresholds. Corporate group rules also affect whether organisations need to participate.

Qualifying organisations need to assess their energy consumption and ensure the required energy use is covered by an appropriate route to compliance.

The purpose is not simply to record how much energy a business uses. ESOS assessments help organisations understand significant energy consumption and identify opportunities to improve energy efficiency.

What is SECR?

SECR is an annual reporting framework covering energy use and carbon emissions.

It applies to quoted companies and certain large unquoted companies and large limited liability partnerships, subject to the relevant qualification rules and exemptions.

Rather than requiring an energy assessment in the same way as ESOS, SECR is primarily concerned with disclosure. Qualifying organisations include specified energy and greenhouse gas emissions information in their annual directors' report or equivalent reporting.

This makes SECR part of the organisation's regular corporate reporting process rather than a periodic energy assessment exercise.

What is the main difference between ESOS and SECR?

The simplest distinction is assessment versus reporting.

ESOS requires qualifying organisations to assess energy consumption and identify energy-saving opportunities. The current ESOS framework also includes requirements around action plans and progress reporting.

SECR requires qualifying organisations to disclose specified energy and carbon information annually.

Both can therefore improve visibility of energy performance, but they do different jobs. ESOS helps identify opportunities for improving energy efficiency, while SECR creates an ongoing requirement to disclose energy and emissions information.

ESOS vs SECR at a glance

The precise qualification and reporting requirements should always be checked against current government guidance rather than assuming that a business falls within scope because of its size alone.

Can a business need to comply with both ESOS and SECR?

Yes. The schemes are separate, and an organisation can fall within the scope of both.

This is why businesses should establish which regulations apply to them individually rather than treating ESOS and SECR as interchangeable.

Where both apply, there can be value in taking a coordinated approach to energy and carbon data. Information gathered for one requirement may support wider sustainability management, but businesses still need to ensure that the specific obligations of each scheme are satisfied.

Does ESOS require businesses to make the recommended improvements?

ESOS is designed to identify opportunities for improving energy efficiency, but identifying a recommendation does not necessarily mean a business must implement that particular measure.

However, ESOS requirements have developed beyond simply completing an assessment. Current Phase 4 guidance includes action planning and progress reporting requirements, including reporting on energy efficiency measures and achieved energy savings.

Businesses should therefore treat ESOS as an opportunity to understand which measures could deliver meaningful improvements, rather than viewing the assessment purely as an administrative exercise.

How can ESOS support wider carbon reduction?

Energy consumption is often an important part of an organisation's carbon footprint, so the opportunities identified through ESOS can inform wider sustainability planning.

Measures might involve operational improvements, energy efficiency projects or investment in suitable green technologies.

Businesses can then assess potential projects according to factors such as expected energy savings, carbon reduction, cost and available resources.

This can help connect regulatory compliance with practical action, turning information gathered through ESOS into a clearer plan for improving environmental and financial performance.

How does SECR support carbon management?

SECR creates a regular reporting cycle for energy and carbon information.

Tracking this information consistently can help a business understand changes in performance and provide greater visibility of its environmental impact.

The value extends beyond completing the annual disclosure. Reliable energy and emissions information can support target setting, carbon reduction planning and conversations with customers, investors and supply chains.

For businesses subject to both ESOS and SECR, this creates an opportunity to use compliance data as part of a more joined-up approach to sustainability rather than treating each requirement as an isolated exercise.

Why accurate energy and carbon data matters

Both schemes depend on businesses having reliable information.

Poor data can make it harder to understand energy performance, calculate emissions accurately or identify where improvements could have the greatest effect.

Businesses should therefore establish clear processes for collecting, checking and maintaining relevant information. This can also make future reporting and assessments easier because the organisation has a more consistent evidence base to work from.

Good data is not only useful for compliance. It gives decision-makers better information when prioritising energy efficiency and carbon reduction activity.

How Green Economy can help

Green Economy's sustainability consultancy includes accreditation readiness support for requirements including ESOS and SECR. Its team includes accredited experts in ESOS and SECR and provides independent, impartial sustainability advice to businesses.

Green Economy's wider decarbonisation support can also help businesses understand their carbon footprint, identify meaningful opportunities to reduce it and turn sustainability objectives into practical action.