Energy Savings Opportunity Scheme - ESOS

ESOS Energy Audits Ltd

Do you need to comply to ESOS? For Phase 2 compliance, ESOS Energy Audits are the perfect partner.

ESOS Phase 1

Deadline | Dec 2015

  • The ESOS Phase 1 deadline was 5 December 2015 – however there are still companies within ESOS that don’t comply

  • The Environmental Agency have been sending out penalty notices to those who are still not compliant – if you’ve received one, get in contact today and get compliant fast

  • Still unsure if you need to comply? Get in touch today, you’ve nothing to lose!

ESOS Phase 2

Deadline | Dec 2019


  • The deadline for Phase 2 compliance is 5 December 2019


  • The data preparation period begins 1 January 2018 meaning it’s time to act


  • Prices are set to increase closer to the deadline, so save money by starting your Phase 2 journey now


  • Stay ahead of the competition by securing your quality lead assessor before resources begin to shorten

Why Us?

The UK's Market Leader


  • We guarantee compliance – We are so confident in what we do that we guarantee compliance to every single one of our customers


  • We have made ESOS a no-fuss experience. Our fully automated reporting process reduces annoying admin meaning our service is cheaper for you!


  • We are the most qualified in country

Comply with ESOS: UK Energy Savings Opportunity Scheme

As a mandatory scheme, all large UK organisations outside the public sector are affected by ESOS. The Carbon Trust provides a complete suite of services to help organisations achieve compliance with the ESOS regulations in a cost-effective and efficient manner and turn energy-saving opportunities into real business advantage.


What is ESOS?

The ESOS Regulations 2014 bring into force Article 8 of the EU Energy Efficiency Directive and mandate that large organisations in the UK undertake comprehensive assessments of energy use and energy efficiency opportunities at least once every four years.


Who is affected?

The criteria for inclusion to ESOS is not entirely straightforward, but essentially it applies to any large undertaking that carries out a trade or a business (most commonly a Company), and any corporate group where at least one member of the UK group meets the ESOS criteria.

  • A large undertaking is one that employs at least 250 people,

  • Or has an annual turnover in excess of €50 million,

ESOS Phase 2

We’re now in Phase 2 of the ESOS compliance scheme. Organisations were required to submit information for Phase 1 of ESOS by 29 January 2016. The regulations require large UK organisations to take three important steps before the compliance date of 5 December 2019:

  • Measure total energy consumption for buildings, industrial processes and transport

  • Conduct audits to identify cost-effective energy efficiency recommendations for areas of significant energy consumption; and

  • Report compliance to their national scheme administrator – the Environment Agency in England, SEPA in Scotland, NIEA in Northern Ireland and NRW in Wales.


To comply with the regulations, a Lead Energy Assessor will need to conduct the ESOS Assessment.   In certain cases organisations can comply automatically. The main way to do this is by providing evidence that they have achieved certification to ISO 50001, the international standard for best practice energy management, across their organisation.   


The ESOS Energy Guide to ESOS


We recognise that many companies will need advice on how to comply with ESOS so we have compiled the ESOS Energy Audits Guide to ESOS that provides practical advice and a summary of how the ESOS Energy Audits can help.

The guide (updated October 2017) includes a step by step approach for Phase 2 compliance:

  • ESOS Background and policy aims

  • How will it affect my organisation?

  • How do I comply with the regulations? 

  • What are the benefits of ESOS to my business?

  • How can the Carbon Trust help?

  • ESOS Compliance Planning and Audit Strategy

  • Accessing the real value of ESOS

  • Appendix - Approved registers of lead assessors


Full guidance on ESOS can be found on the GOV.UK website.

Beyond compliance


Simply complying with the Regulations misses the point of ESOS: to identify opportunities to reduce energy use and to cut consumption, emissions and cost accordingly.  Whilst there is no statutory requirement to take action on these opportunities, not to do so is to reduce ESOS to a costly compliance exercise rather than a means to achieve real savings. There are proven business benefits in addressing energy efficiency. Typically, 20% of a business' annual energy costs are wasted through the use of energy inefficient equipment.

The Guide to Implementing Energy Savings Opportunities has been developed to support businesses in implementing the energy saving opportunities identified from ESOS assessments.  Produced in collaboration with the Department for Energy and Climate Change.

It provides an overview of the steps businesses can take to maximise the impact of their ESOS assessment. It will help organisations follow best practice around the implementation of energy saving opportunities. This guide is particularly aimed at smaller ESOS participants, including those who may have less experience in implementing energy savings and/or may not employ a dedicated energy manager. However, the information in this guide may also be helpful to organisations with previous experience of implementing energy saving opportunities. It may also be helpful to organisations that have identified energy saving opportunities independently of ESOS.

This guide was produced in 2015 by the Carbon Trust on behalf of the UK government’s Department for Energy & Climate Change (now part of the department for Business, Energy & Industrial Strategy). Information was correct the time of publication.

Get in touch to find out how we can help


We can help you comply with the ESOS regulations and go beyond to take advantage of the business opportunities to be gained from energy efficiency. 

We are one of the only offshore qualified ESOS Lead Assessors in the UK with off shore experience in gathering and assessing oil rigs and offshore installations.

This is required under ESOS for UK Oil companies with installations operating in UK waters along with the companies UK based buildings.

What You Need To Know...

Why should I choose ESOS Energy Audits?

We are the UK’s market leader in ESOS compliance. Initially we provide a free informal scoping exercise over the phone to establish your obligations and requirements. For immediate assistance please contact Mike Walker on 0800 030 9292 or get in touch using the contact form.

What is ESOS?

ESOS, the Energy Savings Opportunity Scheme, was introduced by the Government to promote energy efficiency. The scheme was designed to ensure large enterprises are regularly assessing their energy usage every 4 years and, most importantly, to highlight energy savings opportunities as a mandatory practice.

How long does it take?

Each ESOS audit is different, the length of the project can vary from one another. With over 10,000 companies needing to comply, it’s important to stay ahead of competition and begin the route to compliance early. Failure to comply in time can lead to fines of up to £50,000.

How do i know if I need to comply?

To fall into ESOS, an organisation must:

  1. Have over 250 members of staff.
  2. Or turnover of over 50 million Euros and an annual balance sheet total in excess of 43 million euro.
  3. Or be a part of a larger organisation that falls into either of these categories.

What is required?

  1. 90% of energy consumed by the organisation has to be accounted for across all sites, including transport.
  2. Must use 12 months’ verifiable data.
  3. 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.
  4. Energy audits need to be conducted and data submitted every 4 years.
  5. Failure to comply with ESOS can lead to fines of up to £50,000 and public disclosure of noncompliance.


ESOS Energy Audits Ltd. 71-75 Shelton Street, Covent Garden, London, England, WC2H 9JQ

Tel: 0800 030 9292

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