ISO 14001 Transition Training: Preparing for ISO 14001:2026 (EMS Guide for Certified Organisations)

If your organisation holds ISO 14001:2015 certification, you now need to move to ISO 14001:2026. This guide covers what has changed in the environmental management system (EMS) requirements, what stays the same, and what you need to update to keep your certificate.

New to the standard? Start with our ISO 14001 in Plain English guide. For a deeper look at the clause changes, see ISO 14001:2026: what’s changed.

Where things stand

Updated 7 October 2026. ISO 14001:2026, the fourth edition, was published in April 2026. It cancels and replaces ISO 14001:2015 and its 2024 climate change amendment. I have rewritten this guide against the published text.

Key transition dates

UKAS has published its transition timetable. The dates that matter to certified organisations are:

• 15 April 2026: ISO 14001:2026 published.
• 30 April 2027: UKAS transition decisions for certification bodies must be complete. Until your certification body is approved, it cannot issue accredited 2026 certificates.
• 31 October 2027: certification bodies stop all new certifications to ISO 14001:2015.
• 30 April 2029: certification bodies must have moved all certified organisations to ISO 14001:2026.

Your 2015 certificate stays valid until you transition. Plan back from your next surveillance or recertification visit, because that is when most certification bodies will carry out the transition audit.

What has actually changed

ISO 14001:2026 adopts the latest ISO harmonised structure and clarifies several key topics. It is technically revised, but it adds no brand-new management system elements. The main changes are:

• Clause 6.1 restructured. It now has five subclauses: 6.1.1 general, 6.1.2 environmental aspects, 6.1.3 compliance obligations, 6.1.4 risks and opportunities (now its own subclause) and 6.1.5 planning action. Potential emergency situations are now determined under 6.1.2.
• New clause 6.3, planning of changes. Changes that affect the EMS must be carried out in a planned and managed way. Annex A lists triggers such as new processes, changes to compliance obligations, mergers, staffing changes and supply chain disruption.
• Environmental conditions spelled out. Clauses 4.1 and 4.2 carry the 2024 climate text: environmental conditions include climate change, pollution, natural resource availability, biodiversity and ecosystem health.
• Externally provided processes. Clause 8.1 now refers to externally provided processes, products and services, which must be controlled or influenced, with the type and extent defined in the EMS. The term “outsourced process” has gone.
• Management review and improvement. Clause 9.3 is split into general, inputs and results. Clause 10 now has two subclauses, continual improvement and nonconformity and corrective action.
• Terminology. “Maintain” and “retain” documented information become “available as documented information” and “available as evidence of”. “Meet” replaces “fulfil” for compliance obligations.

What stays the same

Your environmental policy, aspects and impacts, compliance obligations, objectives, operational control, emergency preparedness, monitoring, internal audit and management review all continue. A life cycle perspective still does not require a full life cycle assessment.

A practical transition plan

1. Buy the published ISO 14001:2026 standard and confirm your certification body’s transition rules and audit date.
2. Carry out a gap analysis against the changes above.
3. Update clause cross-references in your manual, procedures and audit checklists (for example 6.1.4 becomes 6.1.5).
4. Make sure your aspects register covers emergency situations and the environmental conditions in 4.1.
5. Put a change management procedure and record in place to meet 6.3.
6. Review controls over contractors and other external providers under 8.1.
7. Carry out at least one internal audit to the 2026 requirements and hold a management review that records transition progress.
8. Close any gaps and have the evidence ready for your certification body.

Frequently asked questions

Is my ISO 14001:2015 certificate still valid?

Yes, until you transition. Certification bodies have until 30 April 2029 to move every certified organisation to the 2026 edition.

Do we need a full life cycle assessment now?

No. Annex A confirms that a life cycle perspective does not require a full life cycle assessment.

Can we be certified to ISO 14001:2026 straight away?

Only once your certification body has its own transition approved by UKAS. Decisions run until 30 April 2027, so ask your certification body when it expects to be ready.