Essential ESOS Information:


Introduced by the Government to promote energy efficiency, the ESOS (Energy Savings Opportunity Scheme) Regulations require large enterprises to conduct mandatory energy audits every 4 years. This covers:

•All organisations with over 250 members of staff.

•Or turnover of over 50 million Euros (£38,937,777) and an annual balance sheet total in excess of 43 million euro (£33,486,489).


The Requirements

•90% of energy consumed by the organisation has to be accounted for across all sites, including transport.

•Must use 12 months’ verifiable data.

•ESOS Assessments must be reviewed and signed off by a Board-level Director, and approved by a Lead Assessor and then reported to the Environment Agency.

•Organisations need to comply by submitting their first energy consumption reports by 5 December 2015.

•Energy audits need to be conducted and data submitted every 4 years.

Failure to comply with ESOS can lead to fines of up to £50,000 and public disclosure of noncompliance.

The two most common approaches to ESOS compliance are:

•Undertaking ESOS audits and producing an evidence pack to be signed off by a lead assessor.

•ISO 50001 certification for the whole of the organisation which will count as compliance.

Click here to see how ESOS and ISO 50001 compare.


On average compliance takes between 2 – 4 months from the first scoping meeting to submission.

With 10,000 companies needing to comply from now until 5 December, there is increasing pressure to begin the route to compliance.


ESOS compliance can cost anywhere from £2,500 – £20,000+

Each organisation is different, that is why we offer a free scoping meeting to outline an action plan and identify the costs involved – as well as the potential for energy cost savings.

After the scoping meeting a fixed price for ESOS compliance will be determined, from £2,500.

Please call 0844 8751600 if you’d like to arrange a free scoping meeting, or have any questions.