Energy Savings Opportunity Scheme (ESOS) extended to Phase 5
In the most recent ESOS Newsletter (Issue 33), the government confirmed that ESOS will be extended for a fifth phase. This presents an excellent opportunity for current ESOS Lead Assessors or those looking to upskill into the role.
What is the Energy Savings Opportunity Scheme (ESOS)?
The Energy Savings Opportunity Scheme (ESOS) is a mandatory energy assessment initiative introduced by the UK government to promote energy efficiency among larger organisations.
Under this scheme, organisations with 250 or more employees, or those meeting specific turnover or balance sheet criteria, must undergo an energy usage assessment/audit every four years. This audit includes recommendations for energy-saving measures and is typically completed by a qualified ESOS Lead Assessor.
What Phase are we currently in?
We are currently in Phase 4 of ESOS, where the compliance period started on 6th December 2023 and the qualification date is the 31st December 2026. If a business qualifies for ESOS within this timeframe, they must ensure they meet the ESOS requirements, including conducting energy audits and reporting on energy usage. The compliance deadline for Phase 4 is 5th December 2027, by which time any companies qualifying for ESOS within Phase 4, must have submitted their energy audits and compliance notifications.
An ESOS Lead Assessor can help companies ensure they comply with ESOS by completing their energy assessments and audits. They also offer tailored advice on how a business can reduce their energy bills, producing reports and analysis which are presented to the company.
Why has ESOS been extended to Phase 5 and what opportunities does this offer?
The Energy Savings Opportunity Scheme (ESOS) has been extended to include a fifth phase, spanning from 2027 to 2031. This new phase will incorporate mandatory Net Zero considerations into ESOS audits. These requirements were initially set for Phase 4 but have been deferred to allow organisations additional time to prepare.
This extension presents an exciting opportunity for current ESOS Lead Assessors and those looking to upskill. With the extension of ESOS to a fifth phase, more companies may become eligible under the scheme, and currently eligible companies will need to ensure continued compliance, therefore creating a larger pool of work. It also means that current non-domestic energy professionals (NDEAs and DEC Assessors) have a great opportunity to upskill in this area and take advantage of the additional work opportunities. ESOS Lead Assessors often conduct audits for very large companies and with this comes the opportunity for increased earning potential.
Want to train as a ESOS Lead Assessor?
Elmhurst offer a comprehensive, 4-day classroom course that offers practical training to become a qualified ESOS Lead Assessor. Delivered by expert trainers, the practical learning experience will prepare you for industry and leave you feeling confident you can step straight in to your new role.
Find out More >Further Resources:
https://www.gov.uk/guidance/energy-savings-opportunity-scheme-esos
ESOS Newsletter Issue 33 – https://www.elmhurstenergy.co.uk/app/uploads/2025/02/ESOS-Newsletter-Issue-33-Feb-2025.pdf
Need an ESOS Lead Assessor? Search for one using Elmhurst’s Find an Assessor Directory > https://www.elmhurstenergy.co.uk/find-an-assessor/