ISO 50001:2018
ISO 50001 certification for energy management
Independent certification of an energy management system that measures, controls and improves energy performance.
- Valid for
- 3 years
- Surveillance
- Years 1 and 2
- Verification
- Public register
Accredited and empanelled
What is ISO 50001?
ISO 50001 sets requirements for an energy management system (EnMS). It asks an organisation to carry out an energy review, identify its significant energy uses, establish energy performance indicators and an energy baseline, and use them to plan and verify improvement.
ISO 50001:2018 aligned the standard with the harmonised structure and clarified energy performance concepts, including normalisation of baselines for relevant variables such as production volume and weather. It was amended in 2024 for climate change.
What sets ISO 50001 apart is that certification requires demonstrated improvement in energy performance, not only a working system. Under ISO 50003, the certification body must see evidence of that improvement before initial certification and again at recertification.
Who it is for
- Energy-intensive manufacturers
- Data centres and colocation providers
- Commercial property owners and facility managers
- Hospitals, universities and large campuses
- Transport and logistics fleets
- Water utilities and pumping operations
What sets audit time and cost
Application to certification decision usually takes ten to sixteen weeks, because enough metered data must exist to show improvement against the baseline before the decision.
- Annual energy consumption
- Number of energy types
- Number of significant energy uses
- Effective number of EnMS personnel
- Number of sites and integration with ISO 14001
Why it matters
What ISO 50001 gives you
- 01
Lower energy cost
Attention on significant energy uses and operational control turns energy data into savings that last.
- 02
Verified improvement
Certification depends on demonstrated energy performance improvement, which gives reported savings external credibility.
- 03
Better decisions on equipment
Energy performance is considered in design and procurement, not only after equipment is installed.
- 04
Support for emissions reporting
Reliable energy data and baselines feed carbon accounting and climate disclosures.
The audit
What our auditors examine
- 01
Energy review
Analysis of energy use and consumption, identification of significant energy uses and of improvement opportunities.
- 02
Indicators and baselines
Energy performance indicators suited to your operations, baselines normalised for relevant variables and the method for updating them.
- 03
Operational control
Criteria for the operation and maintenance of significant energy uses, communicated to the people who run them.
- 04
Design and procurement
How energy performance is considered when designing facilities and processes and buying energy-using equipment and services.
- 05
Data collection plan
Measurement of key characteristics, meter accuracy and the energy data used for decisions.
- 06
Demonstrated improvement
Evidence, from indicators against the baseline, that energy performance has improved.
How certification works
Every accredited certificate follows the same three-year cycle, with each step recorded and the result published in our register.
01
Application and quote
Tell us your scope, sites and headcount. We calculate audit time under the accreditation rules and send a fixed quote and audit plan.
02
Stage 1 audit
We review your documented management system, scope and readiness, and agree the Stage 2 plan. Any gaps are reported so you can close them first.
03
Stage 2 audit
Auditors check that the system works in practice: interviews, records and observation across the scope. Nonconformities are raised in writing.
04
Certification decision
Once corrective actions are accepted, a reviewer who did not take part in the audit makes the decision. Your certificate is issued and listed in the public register.
05
Surveillance audits
Shorter audits in the first and second years after certification confirm the system is maintained and improving. The register shows your current status throughout.
06
Recertification
Before the three-year certificate expires, a recertification audit reviews the whole system and renews the certificate for another cycle.
Related standards and audits
Often certified or audited alongside this one, sometimes in a single combined audit.
ISO certification
ISO 14001
Independent certification of how your organisation identifies, controls and reduces its environmental impact.
ISO certification
ISO 41001
Independent certification that facility services are aligned with the needs of the organisation and people they support.
ISO certification
ISO 55001
Independent certification of how your organisation gets value from its assets across their whole life.
ISO certification
ISO 9001
Independent assessment of your quality management system against ISO 9001:2015, by an accredited certification body.
Industries we audit for
Manufacturing
Accredited certification for the quality, environmental, safety and energy systems customers audit you against.
SaaS and cloud
Independent evidence that answers enterprise security reviews and keeps sales moving.
Government and public sector
CERT-In empanelled audits and accredited certification for departments, public sector undertakings and their suppliers.
ISO 50001 questions
We audit; we do not consult.
To keep certification independent, we never design, build or fix the systems we audit, and decisions are made by people who did not take part in the audit. Read our impartiality policy.
Plan your ISO 50001 certification
Tell us your scope, sites and timeline. We reply with an audit plan and a fixed quote.