When do you have to transition to ISO 9001:2026?

Why nobody can tell you the deadline yet

There is a common misunderstanding worth clearing up first, because it explains why the answer is genuinely unavailable rather than merely hard to find. ISO does not set transition periods. ISO writes the standard. How long existing certificate holders have to move to it is decided by the accreditation community, and then implemented by accreditation bodies like ANAB and the certification bodies they accredit.

That community changed shape recently, and this is the second thing most coverage gets wrong. On 1 January 2026, the International Accreditation Forum (IAF) and the International Laboratory Accreditation Cooperation (ILAC) were both replaced by a single body: Global ACI — Global Accreditation Cooperation Incorporated. Legacy IAF mandatory documents moved across under their existing numbering, so "IAF MD 5" is still the correct name of the audit-time document, but IAF is no longer the correct name of the body. If a page tells you the transition will be confirmed by "the International Accreditation Forum," it has not been updated this year.

So the sequence is: ISO publishes, then Global ACI sets the transition rules, then accreditation bodies implement them, then certification bodies get their accreditation extended, and only then can anyone be audited to the new edition. We are at step zero. More on the Global ACI change and what it means for your certificate.

What everyone is currently publishing — and why it doesn't agree

The spread below is the clearest evidence that this is unsettled. These are all reputable organisations. They do not agree because there is nothing yet to agree about.

There is one further signal almost nobody has surfaced. In August 2025, DNV noted that "due to the limited scope of changes, a shorter transition period may be proposed." The 2026 revision is an evolution rather than a restructure — the harmonized structure is retained and there is no clause renumbering — so a 24-month window is a live possibility rather than an outlandish one. We would not plan around it. We would also not assume three years.

The best available proxy: ISO 14001:2026

ISO 14001 went through this same process a few months ahead of ISO 9001, and it is the closest thing to a preview we have.

• Published 15 April 2026 — confirmed.
• 36-month transition, with 2015-edition certificates reported to become invalid 30 April 2029 — reported by DQS, but note that no resolution number is cited for this either.

That is the strongest argument for expecting three years. It is worth knowing how thin even this is: four months after ISO 14001:2026 was published, ANAB was still describing the transition details as pending. If the formal instrument is that lightly documented for a standard already in print, treating September 2029 as a fixed date for ISO 9001 is not justified.

Where the standard actually is right now

ISO development runs through numbered stages. The revision reached stage 60.00 — "International Standard under publication" — on 10 July 2026, the same day FDIS voting closed. That means the text is final and locked, sitting in production. It is not stage 60.60, which is "published."

Note the entry for 23 July 2024. The first committee draft was referred back to the working group as not mature enough, which pushed publication from an original target of late 2025 to September 2026 and extended the project to 36 months. This standard has slipped once already. That is the specific reason we are treating 16 September as expected rather than certain — and it is the signal to watch if the date moves again.

Update, 26 August 2026 — the date is no longer just a report. ISO/TC 176/SC 2 published a news item on 7 August 2026 stating that the FDIS "has been approved with overwhelming international support" and that the sixth edition "is scheduled for publication on 16 September 2026". That is the committee's own words, not a certification body's reading. ISO's project record still shows only "2026-09" with no day, and the standard is still at stage 60.00 rather than 60.60, so we are calling this a committee-confirmed schedule rather than a published fact. Earlier sources — DNV and DQS before the July ballot — said October or November. For context on how the ballot went: the DIS was approved at a 97 per cent approval rate when public comment closed on 19 November 2025.

The document that will set the deadline does not have a number yet

This is the most specific thing we can tell you about the transition deadline, and we have not seen it anywhere else, so here is the full chain of evidence.

Transition periods for accredited certification are set by the accreditation community in a mandatory document. That community is now Global ACI, which replaced both IAF and ILAC on 1 January 2026. Global ACI publishes its General Assembly resolutions, and one of them settles the question.

Resolution 2025-18, from Global ACI's first General Assembly, lists the inherited IAF documents that Global ACI will continue to develop — the documents, in its words, that are “under review or revision”. Two entries on that list read:

IAF MD XX Transition Requirements for ISO 9001

IAF MD XX Transition Requirements for ISO 14001

The XX is unallocated. The document that will set your transition deadline has not been given a number, which means it has not been issued. A companion resolution, 2025-25, keeps the old IAF mandatory documents in force for the purpose of conducting peer evaluations, expressly “recognising that the Global ACI has not yet finalised its own documents”. We are quoting that qualifier because it matters: it is a continuity measure for peer evaluation, not a general adoption of the old documents.

So when we say nobody can tell you the deadline, this is what we mean concretely: not that we have failed to find it, but that the issuing body has published a list on which the document appears without a number. Anyone quoting you an ISO 9001:2026 transition end date today is not sourcing it from ISO or from Global ACI.

We also checked the later General Assembly resolutions and the 2026 e-ballots rather than stopping at the first assembly, in case a number had been allocated since. It has not. The same is true of the parallel document for ISO 14001, which is listed in exactly the same way — even though ISO 14001:2026 has already published, on 15 April 2026, with the 2015 edition withdrawn the same day. A standard can be published, and its predecessor withdrawn, with no transition deadline in existence. That is worth sitting with, because it is the single best answer to anyone insisting your ISO 9001 clock is already running.

How long is the wait likely to be? The sister standard is the best evidence available. ISO 14001:2026 published on 15 April 2026. In a technical bulletin dated 22 May 2026 — six weeks later, for a standard already on the shelf — UKAS was still referring to the anticipated publication of the Global ACI mandatory document for that transition, and set its own deadline for certification bodies in the absence of one. ANAB, similarly, has opened a transition declaration process for ISO 14001:2026 certification bodies and published nothing equivalent for ISO 9001.

So the realistic sequence for ISO 9001 is: publication on 16 September, then a wait before the accreditation-level document appears, then certification bodies extending their own accreditation, and only then transition audits. Anyone telling you the clock is already running has skipped three steps.

One practical note if you go looking yourself: Global ACI’s site is at global-aci.org, with the hyphen. The unhyphenated domain is an unrelated placeholder page with no content on it.

What actually changed, in three tiers

A great deal of what is circulating about this revision is guesswork presented as fact. We are separating it out rather than repeating it.

What to do between now and the deadline you don't have

• If you are already certified: do nothing urgent. Your certificate is valid. Ask your certification body when their accreditation is expected to cover the 2026 edition — they will know before anyone publishes it, and their audit calendar is the real constraint on your timing.
• If you are mid-implementation: keep going, and certify to the 2015 edition. Stopping to wait costs more than transitioning later. Build clause 6 with risks and opportunities separated from the start — that costs nothing now and saves rework.
• If you are about to start: start. A system designed with the revision in view needs updating rather than rebuilding, and the changes are concentrated in areas a well-built system addresses anyway.
• Everyone: the two things worth doing early are evidencing quality culture under clause 5 — which is the hardest new requirement and has almost no practical guidance published anywhere — and splitting any combined risk-and-opportunity register.

Talk through your transition timing

Common questions