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  • Our experts process over 93,000 invoices per month and we've recovered over £11m in over-charges for our clients in the last year
  • We provide support to over 500 businesses for energy and carbon management
  • Our solutions team have identified savings of £37.5m per annum for our clients, a total of 495,338,992 kWh savings identified
  • Last year we saved our CCA clients alone £25.5m

Energy Savings Opportunity Scheme (ESOS)

The deadline for phase three ESOS reporting is December 5th 2023

Get a head start on ESOS Phase 3

Inenco are able to help you with a hassle-free route to compliance

The deadline for phase three ESOS reporting is December 5th 2023. If your organisation qualifies but fails to carry out an ESOS audit and submit the results before that date, you could now face large fines for failing to comply.

For more information give us a call on 08451 46 36 26 and speak to one of our experts.


What is ESOS?

ESOS (the Energy Savings Opportunity Scheme) is a mandatory energy assessment scheme for organisations in the UK that meet the qualification criteria.

ESOS requires companies to carry out audits of the energy used by their buildings, industrial processes and transport every 4 years, to identify cost-effective energy-saving measures.

Who qualifies for ESOS?

  • Employs 250 people or more, or
  • Has an annual turnover in excess of €50 million (approx £40m), and an annual balance sheet total in excess of €43 million (approx £35m)
  • An overseas company with a UK registered establishment which has 250 or more UK employees (paying income tax in the UK).

How much will ESOS cost my organisation?

In order to receive your estimate, just complete all the questions that are displayed and the ESOS quote calculator will provide you with a free no-obligation quotation.

Note: the documentation you need before you start the ESOS Quote Calculator.

  • Organisational Structure
  • Total Consumption per energy source kWh) by site
  • No. of sites alongside site archetype (i.e., offices, retail, manufacturing etc) within the portfolio
  • Transportation information: number of vehicles, annual mileage or fuel cost or litres of fuel by fuel type.
Using a consultancy you can rely on

Starting your ESOS journey now with Inenco will mean less stress and more benefit for your business. We’re here to lead the way, providing expert guidance and communication through every stage of the compliance process. Step one will be a free scoping session to determine your obligation. Then we’ll begin building a structured plan tailored to your specific needs and turning compliance into an opportunity.

We have guided over 449 organisations through ESOS Phase 1 & 2 – achieving a 100% Environmental Agency audit rate and have completed more than 1,440 site surveys and identified over £37m worth of energy savings for our clients.


Our Approach

Secure a lead assessor

A continuing shortage of approved Lead Assessor could pose a serious threat to businesses according to research commissioned by DECC. Inenco has multiple qualified LA with wide industry experience to suit for your business

Identify data gaps and ensure data collection systems are in place

One of the challenges for organisations is the collection of energy data. Starting early, Inenco will be able to help to set up the data management system & smooth the data collection process.

Conduct a site audit

The most persistent method of energy cost mitigation is to reduce consumption & manage demand better. ESOS can help you identify the areas that you can improve and we will then help you to create concrete strategies to make these happen

ESOS report and evidence pack

We will develop and present recommendations which can then be actioned, to mitigate cost rises and help chart your journey to carbon net zero