ISO 9001:2026 Transition Plan: First 90 Days

ISO's TC 176/SC 2 committee announced on 7 August 2026 that "ISO/FDIS 9001 has been approved with overwhelming international support" and that "the sixth edition of ISO 9001 is scheduled for publication on 16 September 2026". If you hold an ISO 9001:2015 certificate, the practical answer is that nothing is required of you in the first 90 days, and the useful work in that window is preparation rather than transition. Your certification body cannot issue an accredited 2026 certificate until its own accreditation is extended, and on the most recent comparable UK transition the equivalent step is scheduled for roughly seven months after publication. This guide sets out what actually happens in what order, and what is worth doing while you wait.

What has been announced, and what has not

Two different things get confused in most coverage of this revision, so it is worth separating them.

Announced	Not announced
FDIS approval (7 August 2026)	The transition deadline
Publication date: 16 September 2026	When UK certification bodies can issue 2026 certificates
That this is the sixth edition	The last date for new certification to ISO 9001:2015

The transition period is not set by ISO. It is set by the international accreditation body and applied by national accreditation bodies — in the UK, UKAS. That international role sat with the International Accreditation Forum until IAF ceased operations on 1 January 2026; Global Accreditation Cooperation Incorporated (Global ACI) commenced operations on the same date and has assumed the former roles of IAF and ILAC. At the time of writing, Global ACI has published no transition resolution for ISO 9001:2026. Every "September 2029 deadline" you will read is an inference from the three-year pattern of previous transitions, not a published date. It is a reasonable planning assumption. It is not a fact, and you should not build a board paper around it as though it were.

Why nothing happens on 17 September

A certification body cannot issue an accredited certificate against a standard it is not accredited for. When the standard publishes, every UKAS-accredited certification body has to demonstrate its own competence against the new edition before it can audit anyone to it.

The most recent comparable UK transition is ISO 14001:2026, published on 15 April 2026. UKAS set out the sequence in a technical bulletin, and the dates are instructive:

Milestone (ISO 14001:2026)	Date	Elapsed from publication
Standard published; UKAS begins accepting self-declarations	15 April 2026	day 0
UKAS portal open for self-declarations and supporting evidence	4 May 2026	~3 weeks
First tranche of UKAS transition decisions to be completed (for CABs submitting by end of October 2026)	30 November 2026	~7.5 months
Transition deadline for certification bodies	30 April 2027	~12.5 months
Certification bodies stop new certifications to the previous version	31 October 2027	~18.5 months
Certification bodies to have transitioned all certified customers	30 April 2029	~3 years

UKAS is explicit about what happens if a body jumps the gun: "certification to ISO 14001:2026 shall only be issued under accreditation following a positive UKAS accreditation decision. Any certification issued prior to this shall be considered unaccredited and managed in line with UKAS TPS 65 and IAF PR7 requirements."

Read that carefully, because it is the single most useful thing in this guide. If a certification body offers you an ISO 9001:2026 certificate before its accreditation decision comes through, the certificate is unaccredited. For most UK businesses an unaccredited certificate is worthless — it will not satisfy a public-sector procurement requirement or a customer's supplier-approval process, which is usually the reason you hold the certificate at all.

None of these 14001 dates apply to ISO 9001. It is a different standard with its own arrangements, and UKAS will publish its own bulletin for this one. What the 14001 timeline gives you is the shape: publication, then roughly seven months before the first certification bodies are due to be accredited, then a long tail.

Your first 90 days: what is actually worth doing

Working back from that shape, here is where the effort pays.

Days 1–30: find out what changed, not what you fear changed

The clause structure is where the work is. Requirements that are substantively similar can still sit under different numbers, and every internal reference in your quality manual, procedures and audit checklists points at a clause number.

• Map your existing documented information against the new structure. Our ISO 9001:2026 vs 2015 clause-by-clause comparison sets out what moved where, and the free clause comparison tool does the mapping interactively.
• List every document that cites a clause number. For a typical 5–100 person QMS that is the quality manual, six to ten procedures, the internal audit checklist and the management review agenda.
• Do not rewrite anything yet. You are building an inventory, not editing.

Days 31–60: talk to your certification body before everyone else does

Transition periods create bottlenecks, and the businesses that book early get the slots they want.

• Ask your certification body three specific questions: when it expects its UKAS accreditation decision, whether it will run transition assessments alongside your scheduled surveillance audit or as a standalone visit, and what it will charge for the difference. The answers vary more than you would expect.
• If you are unhappy with your current body, this is the natural moment to move. There is a separate guide on choosing an ISO 9001 certification body covering what to compare — but note that changing body during a transition adds work, so decide on merit rather than on price alone.
• Get the transition cost into next year's budget. A companion guide on what the ISO 9001:2026 transition will cost breaks down where the money actually goes; it publishes the week after this one.

Days 61–90: run a gap analysis against the new edition

This is the part that shortens your transition audit, and it is entirely within your control.

• Run a documented gap analysis against the 2026 structure. The method is the same one you would use for first-time certification — see the ISO 9001 gap analysis checklist — but the input is your existing QMS rather than a blank sheet.
• Record the output as a dated gap register with an owner and a target date per gap. Your auditor will ask to see evidence that the transition was planned, not improvised.
• Schedule one internal audit against the new edition before your transition audit. Auditing against a standard for the first time in front of an external auditor is a bad plan.

What not to do in the first 90 days

• Do not rewrite your quality manual from the draft. Between FDIS and publication the text is stable, but formal publication is the point at which clause numbering is final. Rewriting three weeks early means checking it all again.
• Do not accept a 2026 certificate before your body's accreditation decision. See the UKAS wording above.
• Do not delay a first-time certification you actually need. If a customer contract requires ISO 9001 this year, certify to the 2015 edition now. Certificates issued to the outgoing edition remain valid through the transition period, and the transition itself is a smaller job than a first certification. The ISO 9001 certification timeline covers realistic lead times.
• Do not book transition training for the whole team yet. One person needs to understand the new structure in detail during this window. Everyone else needs it when the procedures actually change.

Where the dates are still open

Three things are genuinely unknown as of the date this was last reviewed, and any source telling you otherwise is guessing:

1. The transition resolution. Global ACI, which took over the accreditation-cooperation role from IAF and ILAC on 1 January 2026, has published no arrangements for ISO 9001:2026. The three-year pattern is the expectation, not the rule.
2. UKAS's ISO 9001:2026 technical bulletin. UKAS publishes a bulletin per transition; the ISO 14001:2026 one above is the template, not the answer.
3. When your specific certification body will be accredited. The 14001 first tranche is scheduled for completion about seven and a half months after publication. Bodies are accredited individually, and yours may be earlier or later than that.

Plan against the shape, confirm against the bulletin when it lands, and re-check this in the week after publication.

Practical takeaway checklist

1. Inventory every QMS document that cites a clause number
2. Map your current documented information to the 2026 structure
3. Ask your certification body when it expects its UKAS accreditation decision
4. Confirm whether your transition assessment runs with surveillance or standalone, and what it costs
5. Budget the transition in the next financial year
6. Run a documented gap analysis against the new edition
7. Keep a dated gap register with owners and target dates
8. Schedule one internal audit against the new edition before the transition audit
9. Do not accept an unaccredited 2026 certificate
10. Re-check the Global ACI and UKAS positions after 16 September 2026

If you are mapping documentation to the new clause structure, the free ISO 9001:2026 clause comparison tool is the fastest way to see the expected shape of what moved — it carries the same draft-numbering caveat as the rest of this section, and is worth re-checking once the standard formally publishes.

This article is for general informational purposes only and does not constitute legal, regulatory, or professional compliance advice. ISO 9001 is a voluntary standard, not a legal requirement — losing certification is a commercial consequence, not a regulatory one. Transition arrangements are set by Global ACI (which assumed the former roles of IAF and ILAC on 1 January 2026) and applied by UKAS, and were not published for ISO 9001:2026 at the date shown above. Always verify requirements with your UKAS-accredited certification body before making compliance decisions.