Comply with the Energy Savings Opportunity Scheme (ESOS)

Comply with ESOS: a guide to qualification, compliance and notification requirements.



This guidance gives a comprehensive overview of ESOS. It details:

  • which organisations qualify for this mandatory scheme
  • what qualifying organisations need to do to comply
  • how organisations should notify the Environment Agency that they are compliant
  • when the compliance deadline is
  • what the penalties are for not complying

Alternatively, read the shorter overview of ESOS.

Published 17 February 2015
Last updated 1 February 2021 + show all updates
  1. Replaced the PDF with a HTML guide for accessibility reasons. This included adding text alternatives for graphics. Updated section 1.1 to add qualification dates and criteria for the third compliance period. Added table to section 1.7.4, as this was missing from the previous version. Edited section 1.8 to say copies of the written agreement should be kept in the evidence pack. Updated sections 3.1, 3.2 on carrying out an ESOS assessment. Added new section 3.3 on zero energy supplies. Updated section 3.6.2 on buildings to say you should keep copies of any notes or emails to support what you exclude from your total energy consumption in your evidence pack. Updated section 5.3 to correct the date that assessments can have been made for the second compliance period. Updated section 5.4.1 to correct when data used in ESOS energy audits must begin from for the second compliance period. Added section 5.8 on ISO 14001:2015. Updated section A3.1 to say where copies of ISO 50001:2018 can be obtained from. Updated section A3.2 on the use of ISO 14001. Updated section A7.4 to remove the section on enhanced capital allowances, as this is no longer applicable.

  2. Updated Complying with the Energy Savings Opportunity Scheme (ESOS).

  3. Updated Complying with the Energy Savings Opportunity Scheme (ESOS) to include phase 2.

  4. The attachment about complying with the ESOS has been updated.

  5. New version 4 of document: Inclusion of enforcement position and link to the Environment Agency's Enforcement and Sanctions Guidance in Section 9.1. Inclusion of references to this position in sections 2.1 and 8.1. Annex B - Clarification in Q18 of the notification that the number entered should only include 'active' entities. - Clarification of Q25 and additional answer added to reflect enforcement position.

  6. Minor wording changes have been made and some additional paragraphs of text added to this guidance and these are referenced in the version control table in the document.

  7. Minor changes have been made to the guidance document. The version control table in the document contains further information.

  8. First published.