What is ESOS?

ESOS is the UK’s response to Article 8 of the European Commission’s Energy Efficiency Directive. The aim is to cut carbon emissions by requiring large businesses to identify energy reduction measures and make energy savings. Thousands of UK organisations will be affected by the scheme.

What do I need to do?

Under ESOS, all large companies must undertake an energy audit conducted or overseen by an approved ESOS Lead Assessor once every four years. Audits will include an estimate of total energy consumption, covering buildings, industrial processes, and transport, and identify energy saving opportunities. The audit must be signed off by a board-level director before being submitted to the Environment Agency. The first deadline will be 5 December 2015.

Where can I find out more?



Download the ESOS FAQs document

The most common questions about ESOS compliance and regulations, compiled from our webinar attendees and dozens of phone and email queries. Includes anwers and definitions from the Environment Agency. Still have questions about ESOS compliance? Contact us.

3. ESOS Presentation

View the materials from our presentation – ‘Preparing for ESOS Phase 2 – Applying the lessons learnt in Phase One’ at Edie Energy Management Forum 2018.

4. ESOS full details

Further information from DECC and the Environment Agency about ESOS compliance and ESOS regulation, including latest publications and guidance.

ESOS Toolkit

The EI's ESOS toolkit is designed to help those undertaking audits to comply with ESOS legislation. This toolkit can be used by anyone working towards ESOS compliance, whether as an ESOS Lead Assessor or by someone withing a company preparing to appoint an assessor.