ISO 14001:2026 has been published since April 2026. Its foreword leaves no room for doubt: “This fourth edition cancels and replaces the third edition (ISO 14001:2015), which has been technically revised. It also replaces the Amendment ISO 14001:2015/Amd 1:2024.” Organizations certified to the 2015 edition have until 30 April 2029 to make the switch.
What changes in the requirements is covered in detail in our article on what is new in the 2026 edition. This one answers the next question: how to move in practice from a system built on the 2015 edition to a system that conforms to the 2026 edition, without missing anything and without redoing what already works. It is based on a reading of both official editions, 2015 in French and 2026 in English. We compare their structure, whether a clause exists or what a list contains, never the nuance of a verb from one language to the other.
What the foreword will not do for you
The foreword sums up the changes in two lines: the incorporation of the latest requirements common to management system standards, and the clarification of requirements on key topics. It gives no clause-by-clause list and no correspondence table. The gap analysis is therefore done on the text itself, and that is where it most often goes wrong: not on what is new, but on what kept its number while changing its content.
The trap: clause numbers that were kept but no longer mean the same thing
A manual, a procedure, a risk register, an internal audit checklist or a multi-standard correspondence matrix all cite clause numbers. Replacing “2015” with “2026” in their header leaves those references untouched, and several of them now point to different content. Nothing flags it on screen: the document still looks clean, it simply points to the wrong place.
| Reference | In the 2015 edition | In the 2026 edition | What needs correcting |
|---|---|---|---|
| 6.1.1 | General: this is where risks and opportunities, and potential emergency situations, are determined | General: establish the processes needed to meet 6.1.2 to 6.1.5 | Cannot be replaced mechanically: depending on what the document cites, the correct reference becomes 6.1.1, 6.1.2 or 6.1.4 |
| 6.1.2 | Environmental aspects | Environmental aspects, and determination of potential emergency situations | Link potential emergency situations to 6.1.2 |
| 6.1.4 | Planning action | Risks and opportunities | A reference to the action plan moves to 6.1.5 |
| 6.1.5 | Does not exist | Planning action | New number for the action plan |
| 6.3 | Does not exist | Planning of changes | New clause, no existing reference to correct |
| 9.3 | A single clause for management review | Three subclauses: 9.3.1 general, 9.3.2 management review inputs, 9.3.3 management review results | Specify the subclause intended |
| 10.1 | General: determine opportunities for improvement | Continual improvement | Check what the reference was meant to designate |
| 10.3 | Continual improvement | No longer exists | Every reference moves to 10.1; an audit finding written against 10.3 targets a clause that has disappeared |
The order of the corrections matters. In a document written on the 2015 edition, “6.1.4” always designates the action plan: replace it with 6.1.5 first. Only then do the references to risks and opportunities, which pointed to 6.1.1, move to 6.1.4. In the reverse order, the second pass shifts again what the first one has just corrected, and risks and opportunities end up in 6.1.5, together with the action plan.
What changes without changing number
- 6.1.2, environmental aspects. The list of what must be taken into account goes from two points to three: normal and abnormal conditions, changes (with a reference to the new clause 6.3), and potential emergency situations. Normal conditions are now named explicitly: a register of aspects built only on abnormal and emergency situations needs to be completed.
- 9.2.2, internal audit programme. Each audit must have its audit objectives defined, in addition to its audit criteria and audit scope, and the audit programme itself appears in the list of documented information. An audit plan without a written objective becomes a gap.
- 10.1, continual improvement. The clause brings together what was split between the former 10.1 (determine opportunities for improvement) and the former 10.3 (improve continually). Opportunities are now determined on the basis of clause 9 and 10.2.
- 4.1 and 6.3. The environmental conditions given as examples in 4.1, including climate change, and the planning of changes in 6.3 are covered in detail in our article on what is new. In the gap analysis, these are requirements to demonstrate, not documents to create: neither one requires documented information of its own.
The gap analysis in five steps
- List everything that cites a clause number. Manual, procedures, register of environmental aspects, register of risks and opportunities, action plan, internal audit programme and checklists, management review minutes, correspondence matrix with ISO 9001 or ISO 45001. These are the documents that the renumbering breaks.
- Correct the references in the right order, using the table above: 6.1.4 to 6.1.5 first, then risks and opportunities to 6.1.4, 6.1.1 case by case, 10.3 to 10.1, and management review to the correct subclause of 9.3.
- Review the system requirement by requirement against the 2026 text. A checklist that follows the 2026 edition avoids comparing from memory: our free ISO 14001 checklist is built on this edition. Each gap is recorded with the expected evidence, not with an intention.
- Run the system once on the new basis before the transition audit: an internal audit with written objectives, and a management review that covers 9.3.2 and 9.3.3. This is what lets you show, when the day comes, a system that operates according to the 2026 edition, and not just updated documents.
- Set the date of the transition audit with your certification body, in line with the timeline below.
Setting the timeline: three dates, and yours
The deadlines come from Global ACI, which took over the responsibilities of the IAF, in the document Global ACI-TECH-3-TR 2029-04-30 (M):
- 31 October 2026: accreditation bodies must be ready to assess against the 2026 edition;
- 31 October 2027: accredited initial certifications are issued only against the 2026 edition;
- 30 April 2029: end of the transition for organizations certified to the 2015 edition.
The switch takes place during a surveillance audit, a recertification audit or a dedicated transition audit. Your own date therefore depends on your certification cycle, and on a condition that is often forgotten: your certification body must itself have moved to the 2026 edition before it can audit you against it. Ask it from when it can do so. If your first certification is planned after 31 October 2027, the question does not arise: it will be carried out directly against the 2026 edition.
To break this work down into phases, with their checkpoints, our ISO 14001 transition guide follows the same logic.
Also certified to ISO 9001: two transitions, one method
ISO 9001:2026 has been published since September 2026, and its transition ends on 30 September 2029 (Global ACI-TECH-3-TR 2029-09-30 (M)). The two editions share a useful feature: in both, clause 10.3 disappears and continual improvement becomes 10.1. Both also include a clause 6.3 on planning of changes, new in ISO 14001 and present in ISO 9001 since 2015.
The 6.1.x numbers, on the other hand, do not overlap. In ISO 9001:2026, 6.1.1 determines risks and opportunities, 6.1.2 deals with actions to address risks and 6.1.3 with actions to address opportunities; in ISO 14001:2026, 6.1.2 remains environmental aspects and 6.1.3 compliance obligations. A multi-standard correspondence matrix is therefore reworked cell by cell, never by substitution. The details of the 9001 edition are in our reading of the published text, and your certification body will tell you whether it can conduct both transition audits together.
Sources
- ISO 14001:2026, Environmental management systems, Requirements with guidance for use (official ISO page).
- Global ACI, transition requirements for ISO 14001:2026.
- Global ACI, transition requirements for ISO 9001:2026.
This article compares the two editions and does not replace them. HEMC supports the transition; certification is granted by an accredited certification body.
