ESOS vs SECR: What’s the Difference and Which Scheme Applies to Your Organisation?
ESOS and SECR are two of the most important energy and carbon reporting schemes in the UK and also two of the most commonly confused. Many organisations assume that compliance with one removes the need for the other. ESOS and SECR serve different purposes, have different scopes, and often apply at the same time. This blog explains the key differences between ESOS and SECR and how organisations can manage both efficiently.
What Is ESOS?
The Energy Savings Opportunity Scheme (ESOS) is a mandatory energy assessment scheme for large UK organisations.
Its purpose is to:
- Identify how energy is used across an organisation
- Highlight cost‑effective energy efficiency opportunities
- Encourage long‑term reductions in energy consumption.
Key characteristics of ESOS:
- Applies to large undertakings
- Requires energy audits every four years
- Covers buildings, transport and industrial processes
- Focuses on opportunity identification, not mandatory implementation.
For further information on ESOS download our free guide.
What Is SECR?
Streamlined Energy and Carbon Reporting (SECR) is a statutory reporting requirement introduced to increase transparency around energy use and carbon emissions.
Its purpose is to:
- Improve corporate accountability
- Provide consistent energy and emissions data
- Support investor, stakeholder and public scrutiny.
Key characteristics of SECR:
- Applies to large UK companies and LLPs
- Requires annual disclosure in statutory accounts
- Focuses on actual energy consumption and emissions
- Includes Scope 1 and Scope 2 carbon reporting.
For further information on SECR download our free guide.
ESOS vs SECR – key differences at a glance
| Aspect | ESOS | SECR |
|---|---|---|
| Primary purpose | Identify energy saving opportunities | Public reporting of energy & emissions |
| Reporting frequency | Every 4 years | Annually |
| Applies to | Large undertakings | Large UK companies & LLPs |
| Coverage | Buildings, transport, processes | Energy use & carbon emissions |
| Focus | Energy efficiency opportunities | Transparency & disclosure |
| Regulator | Environment Agency | Companies House (via accounts) |
Do ESOS and SECR apply to the same organisations?
Often – yes.
Many large UK organisations are required to comply with both ESOS and SECR at the same time.
However:
- Some organisations fall into ESOS but not SECR
- Others are captured by SECR but not ESOS
- Group structures can complicate applicability.
The schemes use different qualification tests, which means overlap is common but not universal.
Common misunderstandings about ESOS vs SECR
Some of the most common misconceptions include:
- “If we do ESOS, we don’t need SECR”
- “SECR replaces ESOS”
- “ESOS recommendations must be implemented”
- “Only manufacturing businesses are affected”.
None of these statements are correct. Each scheme has distinct legal requirements.
Which scheme is more important?
Neither scheme replaces the other.
- ESOS is about understanding and improving energy use
- SECR is about reporting and accountability.
From a regulatory and reputational perspective, both are equally important.
How ESOS and SECR work together
Although ESOS and SECR are separate schemes, they are increasingly linked in practice.
ESOS supports SECR by:
- Improving energy data quality
- Identifying efficiency measures that reduce reported emissions
- Strengthening governance around energy management.
SECR supports ESOS by:
- Providing a consistent annual energy baseline
- Increasing board‑level visibility of energy performance
- Driving accountability through public disclosure.
Benefits of combining ESOS and SECR
It is easy to assume that with all the differences between ESOS and SECR that each should be undertaken separately, however, the principles of collecting, processing and understanding the data is the same.
So, if your business is in scope to comply with both, here are a few reasons why it is smart to combine them:
- Because ESOS spans a four-year cycle, it can often be left to the last minute. In our experience, companies who do this run the risk of missing the compliance deadline and gaining a financial penalty. We encourage companies to start their ESOS as much as they can, as soon as they can. The most time-consuming task is the audit process, so by collecting the data with both schemes in mind you effectively ‘kill two birds with one stone’ and then you can focus on the audits involved in the ESOS.
- SECR and ESOS responsibilities may belong to different people or departments. By engaging with colleagues across the business, the collaboration will ensure there is no duplication when it comes to data collection, energy profiling or benchmarking.
- Your annual SECR processes will help to phase the workload for an ESOS schedule. For example, by collating SECR data annually, you will already have all the data, including the hard to gather data, ready for your ESOS report.
- By using the SECR data you already have in your energy management database, not only will you find it easier to create reports for ESOS, but it will also provide insights on what data you should focus on collecting.
- Completing ESOS surveys can help businesses identify energy efficiency projects which can positively feed into your SECR reporting.
- Joining up these compliance processes helps you to approach net zero with a single focussed strategy rather than in a series of compliance box ticking.
Organisations that integrate ESOS and SECR reduce duplication, cost and compliance risk.
Preparing for the Future – Why Integration Matters
Future regulatory changes (including ESOS and wider sustainability reporting) will place increasing emphasis on:
- Data accuracy
- Evidence retention
- Consistency across reporting schemes.
Organisations that treat ESOS and SECR as isolated tasks often struggle to scale or adapt.
How TEAM Energy Supports ESOS and SECR Compliance
TEAM Energy helps organisations manage both ESOS and SECR efficiently, including:
- ESOS Lead Assessor services
- SECR energy and carbon reporting software
- Data integration across schemes
- Long‑term energy and carbon strategy support.
Understanding the difference between ESOS and SECR is critical for UK organisations with energy and carbon reporting obligations.
While the schemes are different, they are most effective when managed together reducing risk, cost and complexity while supporting long‑term energy performance improvements.
Learn more about TEAM’s:
Take a look below at feedback we have had from a customer since delivering their combined ESOS and SECR service:
“Quick responses and all the team were very helpful, thank you! Very satisfied with TEAM’s ESOS and SECR service and rate the service value far above average. Very likely to use your consultancy services again.” Squarepoint Capital