The Energy Savings Opportunity Scheme (ESOS) is a UK energy assessment scheme for large organisations. It runs in phases and requires qualifying businesses to measure total energy consumption, identify cost-effective opportunities to reduce energy use, and maintain an evidence pack reviewed by an ESOS Lead Assessor. Beyond compliance, a well-run ESOS assessment can uncover waste, improve operational performance and support longer-term carbon and sustainability goals.
ESOS applies to UK organisations that meet at least one of the following criteria on the qualification date:
Non-compliance can lead to financial penalties and enforcement action, so accurate and timely assessment is essential.
Our specialists manage the entire ESOS process for you, from data gathering and site audits to analysis, recommendations and formal submission, ensuring a smooth, stress-free route to compliance and energy savings.
Our ESOS delivery is data-led, combining accurate energy data with practical site audits to produce a compliant assessment and a prioritised action plan.
We confirm which parts of your organisation fall within ESOS, check for overlaps with ISO 50001 or previous audits, and gather all required energy data across electricity, gas, fuels and transport. This allows us to agree a proportionate audit plan, clear milestones and the right level of detail for your business.
We carry out structured audits on your significant energy uses, working with site teams to understand how systems operate day-to-day. From this, we identify quick wins and larger investment opportunities, providing estimated savings, costs and paybacks for each recommendation.
We prepare your full ESOS evidence pack and support the Lead Assessor and director sign-off. Once complete, we submit your compliance notification and hand over a clear, prioritised action plan that links ESOS findings to SECR reporting and your wider net-zero strategy.
Clear visibility of where energy is used and wasted, with engineered recommendations to improve performance.
A prioritised pipeline of measures with indicative costs, savings and paybacks.
A compliant evidence pack, Lead Assessor support and submission process managed end-to-end.
Outputs that support SECR and wider Net Zero planning, with a consistent, credible narrative
Our team prioritises your satisfaction, providing personalised solutions and expert guidance to ensure a seamless experience that exceeds expectations every time.
Join our extensive network of existing customers who have benefited from substantial cost savings through tailored solutions and strategic approaches.
Our proven strategies and dedicated support has already helped our existing customers save more than £3.2m on their energy bills. Join us and discover how much you could save.
ESOS requires large UK organisations to measure total energy use, audit significant energy areas and identify cost-effective improvements every four years.
You are likely in scope if your organisation:
Has 250+ employees, or
£44m+ turnover and £38m+ balance sheet, or
Is part of a group that meets these thresholds
DES confirms your position and helps navigate complex group structures.
DES runs the entire process efficiently and with minimal disruption.
No. DES can quickly assess your position and prioritise the minimum required steps to achieve compliance before developing a longer-term strategy.
No. DES can quickly assess your position and prioritise the minimum required steps to achieve compliance before developing a longer-term strategy.
Yes. We support business cases, procurement and delivery of the improvements highlighted in your ESOS audit.
