We can help you start your ESOS journey right away, whether you took part in Phase 1-3, or if you are new to the scheme and unsure of your energy compliance requirements. We can begin conducting audits now, to ensure the overall process runs as smoothly as possible. This will maximise the time we have to achieve the latest ESOS Phase 4 deadline.
ESOS applies to large UK organisations fulfilling one of the following criteria:
The Energy Savings Opportunity Scheme (ESOS) is designed to help large organisations in the UK improve their energy efficiency and reduce their environmental impact. The primary objectives of ESOS are:
In order to become ESOS compliant, an audit will need to be conducted covering the energy consumption for your buildings, fleet and processes. A sample of your company’s buildings will require an onsite audit. Optional onsite audits for your company’s fleet and processes (manufacturing) can also be requested.
ESOS compliance can also be achieved if an organisation has achieved ISO50001 certification that covers 100% of the company’s sites. If, however, the ISO 50001 certification only covers part of the company’s sites, an ESOS audit will still be required for the remainder. The ISO50001 standard is a framework through which organisations can become more energy efficient using an energy management system. Any organisation that is covered by ISO50001 can simply advise the Environment Agency that they are ESOS compliant.
Alternatively, an organisation which has obtained a Display Energy Certificate (DEC) that covers 90% of its energy usage which was issued, with a report, within the compliance period, would not need to comply. However, it is important to state that a registered ESOS Lead Assessor is still required to review this compliance.
The qualification date for phase 4 of ESOS is 31st December 2026. This means that the 12-month reference period used for your ESOS audit must include this date. The deadline for notification of compliance is 5th December 2027. This should be made with the UK Environment Agency.
Overall, ESOS provides a framework for organisations to improve their energy management, which can lead to financial and environmental benefits.
ESOS is a mandatory UK scheme requiring large organisations to conduct energy audits every four years to identify energy-saving opportunities. In contrast, ISO 50001 is a voluntary international standard that provides a continuous, comprehensive framework for managing and improving energy performance, leading to formal certification through an accredited body. ISO 50001 is generally viewed as a more in-depth approach and as a result, it can be used as a way to comply with mandatory ESOS requirements.
While the time required to achieve compliance can vary dramatically from organisation to organisation based on existing energy efficiency measures and business processes. The Government’s Department for Business Energy & Industrial Strategy (BEIS) found that companies took an average of 15 days to implement the necessary processes for compliance – although this time could be spread over several weeks or months as required.
If you are eligible for ESOS Phase 4, it is recommended that you book your audit now to guarantee that an ESOS Lead Assessor will be able to complete your audit before the compliance deadline.
No, ESOS does not apply to the public sector. It is specifically targeted at large private sector organisations in the UK, requiring them to conduct energy audits and identify energy-saving opportunities. Whilst public sector organisations are not mandated to participate in ESOS they may have other regulatory or voluntary schemes to address energy efficiency and sustainability such as those relating to the Energy Performance of Buildings Directive (EPBD), or specific net-zero targets set by the government.
Yes, charities must comply with ESOS if they meet the qualification criteria, which include having 250 or more employees, or an annual turnover exceeding €50 million (approximately £44 million) and a balance sheet exceeding €43 million (approximately £38 million). If a charity falls within these thresholds, it is required to conduct energy audits and report compliance, just like any large private sector organisation.