ESOS is a mandatory energy assessment scheme for organisations in the UK that meet the qualification criteria. The Environment Agency is the UK scheme administrator.

The scheme applies to large undertakings, which are defined as:

  1. Any UK company that either:
    1. employs 250 or more people, or
    2. has an annual turnover in excess of 50 million euro (£38,937,777), and an annual balance sheet total in excess of 43 million euro (£33,486,489);
  2.  an overseas company with a UK registered establishment which has 250 or more UK employees (paying income tax in the UK).

Organisations that qualify for ESOS must carry out ESOS assessments every 4 years. These assessments are audits of the energy used by their buildings, industrial processes and transport to identify cost-effective energy saving measures.

Organisations must notify the Environment Agency by a set deadline that they have complied with their ESOS obligations. The deadline for the first compliance period, 5 December 2015, has now passed.

For further information, visit The Gov website