ISO 9001:2026 vs ISO 9001:2015: What Changed?

ISO 9001:2026 is a refinement of ISO 9001:2015, not a new system. ISO published it on 16 September 2026, and it replaces the 2015 edition together with its 2024 climate amendment. The clause structure is the same Harmonized Structure, and customer focus, the process approach, risk-based thinking and continual improvement all remain. The changes ISO itself highlights are a stronger leadership role on quality culture and ethical behaviour (clause 5.1), a quality policy more explicitly tied to context and strategic direction (clause 5.2), a clearer distinction between risks and opportunities (clause 6.1), new awareness requirements on quality culture and ethical behaviour (clause 7.3), and a new Annex A that explains concepts, terms and the intent of the requirements.

For certified organisations, nothing is invalidated overnight. Accredited certificates to ISO 9001:2015 remain valid during a transition that ends on 30 September 2029, and from 31 March 2028 new certifications are issued only to the 2026 edition. The practical question is not "what is new in the standard" but "where does my current QMS fall short of the new text". This article sets out what has been confirmed, what has not, and how to compare the two editions without relying on second-hand summaries.

What ISO has confirmed, and what it has not

The most reliable description of the revision is ISO's own. ISO describes the 2026 edition as strengthening existing requirements, clarifying their intent and reinforcing areas that have grown in importance since 2015. It names four headline clause changes and a new annex, then says there are "a range of smaller refinements and editorial clarifications" reflecting digitalisation, organisational knowledge, increasingly complex supply chains and resilience.

That last sentence matters. ISO has not published a complete, clause-by-clause list of every wording change in a free summary. Many commentaries now circulating attribute specific new "shall" statements to particular subclauses. Some of those claims will be right and some will not. Until you have read the published text, treat any detailed list that does not come from the standard itself as a lead to check, not a fact to implement.

The ISO store offers the 2026 edition in a format that includes a redline against the previous edition. For a quality manager running a gap check, that redline is the most efficient single tool available: it shows every changed sentence, including the editorial ones no summary will mention.

Side-by-side: the confirmed changes

Area	ISO 9001:2015 (incl. Amd 1:2024)	ISO 9001:2026, as described by ISO	What to check in your QMS
Leadership (5.1)	Top management demonstrates leadership and commitment to the QMS	Greater emphasis on quality culture, ethical behaviour and an environment where everyone contributes to QMS effectiveness	Can top management show, with examples, how they promote quality culture and ethical conduct, not just sign the policy?
Quality policy (5.2)	Policy appropriate to purpose and context, supporting strategic direction	Policy more explicitly linked to context and strategic direction	Does the policy read as yours, connected to your strategy, or as generic wording any firm could use?
Risks and opportunities (6.1)	Risks and opportunities addressed together	Clearer distinction between managing risks and pursuing opportunities	Does your planning record opportunities as a separate line of thinking, with decisions taken on them?
Awareness (7.3)	Awareness of policy, objectives, contribution and consequences of not conforming	New awareness requirements covering quality culture and ethical behaviour	Do induction, briefings and training cover culture and ethics, and can staff explain them in their own words?
Annex A	Informative annex on clarification of new structure, terminology and concepts	New Annex A clarifying key concepts, terminology and the intent behind requirements	Read it before interpreting changed clauses. It explains intent, which is what auditors test
Climate change	Added to context (4.1, 4.2) by Amendment 1:2024	Carried forward into the 2026 edition	Keep your climate relevance determination current. It is not a new requirement
Structure	Harmonized Structure (then "Annex SL") clauses 4-10	Harmonized Structure retained	No renumbering exercise is needed for the main clauses

Two points in that table need emphasis.

First, the leadership and awareness changes are about behaviour, which is harder to evidence than a document. A revised quality policy can be drafted in an afternoon. Showing that top management actively promotes a quality culture, and that people at the front line understand what ethical behaviour means in their work, takes longer and cannot be produced the week before an audit.

Second, climate change is often presented as a 2026 novelty. It is not. The 2024 amendment already required organisations to determine whether climate change is a relevant issue, and added a note that relevant interested parties can have climate-related requirements. If you did not address it then, your 2015 certificate already carries that gap.

What has not changed

ISO is explicit that the greatest strength of the new edition may be what stays the same. In practical terms:

• The structure. Clauses 4 to 10 follow the same Harmonized Structure used by ISO/IEC 27001, ISO 14001, ISO 45001 and other management system standards. Integrated systems keep their shared skeleton.
• The principles. Customer focus, the process approach, risk-based thinking and continual improvement remain at the core.
• The operational core. ISO's summary does not identify any headline change to the operational requirements in clause 8. Check the redline for refinements, but do not plan a rebuild of your operational controls on the strength of a rumour.
• Documented information. ISO has not announced a return to a mandatory quality manual or mandatory procedures. Keep documentation proportionate to what your processes need.
• Certification. Certified organisations do not restart certification. ISO's guidance is that your certification body will advise on timing and next steps.

Reading the four headline changes as an auditor would

Auditors do not audit summaries. They audit the text, against evidence. Here is how we expect each confirmed change to be tested, framed as audit questions rather than requirements, because the exact wording is in the standard.

Leadership, culture and ethics (5.1)

Expect questions to top management directly, not to the quality manager on their behalf. Useful evidence is ordinary business material: decisions where quality outweighed short-term delivery pressure, how ethical concerns are raised and handled, what leaders say and do when a nonconformity is reported. A culture statement on the intranet is weak evidence on its own.

For example, a 120-person contract manufacturer could show a management review minute where a shipment was held despite schedule pressure, the follow-up communication to staff, and the route by which an operator raised the concern. That is evidence of culture in action.

Quality policy and strategy (5.2)

The test is whether the policy connects to where the business is going. If the strategy says the organisation is expanding into regulated customers, a new geography or a new service line, the policy and objectives should reflect what quality means in that direction. A policy unchanged since 2016 that mentions none of the current strategic priorities is the obvious gap.

Risks and opportunities (6.1)

Many 2015-era QMSs record risks with a token "opportunity" column that is rarely filled. ISO describes the 2026 edition as making the distinction clearer and encouraging proactive use of both in decisions. In audit terms, expect to be asked which opportunities were identified, who decided to pursue or decline them, and what happened. A short opportunities log tied to management review decisions is more convincing than an extra column in the risk register.

Awareness of culture and ethics (7.3)

Awareness is tested by talking to people. An auditor will ask a dispatcher, a project lead or a service engineer what quality culture means in their role and what they would do if asked to cut a corner. Training records show that a session happened. Interviews show whether it worked.

Common misreadings to avoid

• "Our 2015 certificate is now invalid." It is not. It remains valid within the transition period, subject to your normal surveillance and recertification.
• "We have to rewrite the whole QMS." ISO's own advice is to build on existing systems, keep what works and make targeted changes.
• "Risk-based thinking has been replaced." It remains a core principle. The change is a clearer separation of risks and opportunities, not removal.
• "Climate change is the big new requirement." It was added in 2024 and is carried forward.
• "A consultant's list of new shall statements is enough." Only the published text is the requirement. Check every claimed change against it.

Transition dates that drive your plan

Date	What happens
16 September 2026	ISO 9001:2026 published; ISO 9001:2015 and Amd 1:2024 withdrawn by ISO
31 March 2028	From this date, new certifications are issued only to ISO 9001:2026
30 September 2029	End of the accredited transition period; 2015 certificates cease to be valid

These dates come from the transition arrangements of Global ACI, the body formed when the International Accreditation Forum and ILAC merged on 1 January 2026. Your certification body applies them, and may set its own internal deadlines for booking transition audits. Ask early, because demand tends to bunch towards the end of any transition window.

How to compare your QMS with the new edition

A structured comparison takes days, not months, for most organisations. A workable sequence:

1. Buy the standard, ideally with the redline. Do not work from summaries, including this one.
2. Read the new Annex A first. It explains intent, and intent is what you will be audited against when wording is open to interpretation.
3. Map each changed clause to an owner. Clauses 5.1 and 5.2 belong to top management, not to the quality team.
4. Record the gap and the evidence you would show. For each change: what you do today, what the text now expects, what evidence would demonstrate it.
5. Decide what to change and when. Some gaps close with a document revision. Culture and awareness gaps need a plan that runs over several months.
6. Test it before the certification body does. An independent internal audit against the 2026 edition shows whether the changes work in practice, and gives management review something real to consider.
7. Agree timing with your certification body. Many organisations align the transition with a surveillance or recertification visit. Your certification body decides what is possible.

If you run more than one management system, do the comparison once across the integrated structure rather than standard by standard. The shared clauses on leadership, policy and planning are where an integrated management system saves effort.

Where Kellwick fits

We carry out gap checks against the published 2026 text, independent internal audits against the new edition, and ongoing QMS support through a Managed QMS arrangement. We are not a certification body. We do not issue certificates and cannot guarantee a transition audit outcome. What we can do is make sure that when your certification body arrives, the evidence for each change already exists and management can speak to it. For broader context on how decisions should be recorded, see why management review is not a meeting formality.

This article reflects the sources listed and will be reviewed as certification bodies and ISO/TC 176 publish further guidance on the 2026 edition.