Energy Savings Opportunity Scheme (ESOS) compliance

What is ESOS?

The Energy Savings Opportunity Scheme is the UK’s mandatory energy assessment scheme for large organisations. Qualifying businesses must assess energy use across buildings, transport and industrial operations every four years, identify cost-effective efficiency opportunities, and report on implementation progress.

Turn ESOS Phase 4 into a commercial opportunity

The compliance window for ESOS Phase 4 is open and you can start preparing now, ahead of the 5th December 2027 deadline. 

Organisations that engage early with ESOS are much more likely to unlock commercial value from the process. Concept can help you move beyond compliance – using ESOS to shape longer-term energy management and achieve tangible cost savings.

Do I qualify for ESOS Phase 4?

Your organisation qualifies for ESOS Phase 4 if it operates in the UK and meets the following criteria:

  • Employs 250 or more people
  • Has an annual turnover exceeding £44 million
  • Has an annual balance sheet total exceeding £38 million
Not sure if you qualify? Get in touch for advice.

ESOS key deadlines

  • 2nd Action Plan Progress Update (Phase 3): 5 December 2026
  • Qualification Date for Phase 4: 31 December 2026
  • Phase 4 Compliance Deadline: 5 December 2027

ESOS ACTION PLAN GUIDE

Download your free best practice guide now to unlock the full potential of your ESOS Action Plan and drive meaningful change in your organisation’s energy management.

Why Concept?

Concept was established in 2008, to help organisations make better energy decisions. Our Environment Agency-approved ESOS Lead Assessors have been helping organisations achieve compliance since the scheme launched in 2014.

ESOS shouldn’t be onerous. We’ll help you streamline your approach to compliance and use your ESOS findings as a springboard for action. Our decarbonisation consultants will work with you to develop a strategy that delivers long-term cost and carbon savings. Get in touch today.

How we can help

GET IN TOUCH

Make ESOS Phase 4 count.

Feel free to contact one of our ESOS Lead Assessors who can advise on your ESOS Phase 4 obligations, as well as how to streamline the process and unlock long-term commercial benefits.

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