Energy compliance & ESOS
ESOS audits and action plans for large undertakings, plus SECR reporting support, run to the compliance deadline rather than against it.

Why it matters
The Energy Savings Opportunity Scheme requires large UK undertakings — broadly, those with 250 or more employees, or turnover above £44 million and a balance sheet above £38 million — to carry out an energy audit every compliance phase and notify the Environment Agency. Streamlined Energy and Carbon Reporting adds energy and carbon disclosure to the annual report for many of the same organisations.
ILUX runs the site audits, consolidates the estate-wide data and prepares the reporting, so compliance is evidenced rather than assumed.
What's included
- Confirmation of whether your organisation qualifies for ESOS and which sites need auditing
- Energy audits carried out to the current ESOS phase requirements across qualifying sites
- Consolidation of consumption data across the estate for reporting purposes
- A prioritised action plan of energy-saving measures, not just a compliance record
- Support preparing SECR disclosures where they apply to your organisation
- Documentation retained and available for review ahead of the next phase
Compliance deadlines fall on a fixed cycle set by the scheme phase. We build the audit and reporting timeline back from that date so there's no scramble at the end.
An ESOS audit is a starting point, not an endpoint.
The measures it identifies only save anything once they're acted on — most clients take the priority list straight into a monitoring or upgrade programme.
How it fits a multi-site contract
Where ESOS applies, it's usually one exercise run across the whole estate rather than site by site, drawing on the same consumption data used for energy monitoring and any energy contracts already in place.
Common questions.
How do we know if ESOS applies to us?
It's based on employee numbers or a combination of turnover and balance sheet size, assessed at group level. We'll confirm your qualification status before scoping any audit work.
What's the difference between ESOS and SECR?
ESOS requires a periodic energy audit and notification to the Environment Agency. SECR requires energy and carbon figures to be disclosed in the annual report. Some organisations need both, and we support each.
What happens if we miss a deadline?
Non-compliance can carry penalties, and we plan the audit and reporting timeline well ahead of the deadline to avoid that. If you're already close to a deadline, tell us and we'll prioritise accordingly.
Confirm what applies to your organisation.
Tell us your organisation's size and current status and we'll set out the compliance route.