ESOS Phase 4 Timeline – 16th March 2026
The final deadline for ESOS Phase 4 compliance notification is 5th December 2027. Organisations must determine their qualification status on 31st December 2026, with the compliance period running from 6th December 2023 to 5th December 2027, requiring audits and actions to be completed by that date.
Key Dates for ESOS Phase 4:
- Qualification Date: 31st December 2026.
- Compliance Deadline: 5th December 2027.
- Action Plan Reporting Deadline: 5th December 2028.
- Annual Progress Updates: 5th December 2025 and 5th December 2026.
What You Need to Know:
- Scope: Large UK undertakings (250+ employees, or £44m+ turnover and £38m+ balance sheet) must comply.
- Requirements: Mandatory energy audits and reporting of total energy consumption in kWh.
- Action Plan: Organisations must submit an Action Plan outlining energy-saving measures.
It is recommended you start energy audits during 2026 to manage the workload ahead of the 2027 deadline.
2EA Can Help
2EA supports you through every stage of ESOS, from confirming your qualification status to completing compliant energy audits and reporting. We calculate your total energy consumption, identify practical energy-saving opportunities, and produce a clear Action Plan aligned with ESOS requirements. Our team also assists with submissions and ongoing progress updates, ensuring you meet all deadlines while delivering real cost and carbon savings.
