ISO 9001:2026 is published. Here are the transition dates that matter.

Your certification body sends the email on a Tuesday. ISO 9001:2026 is here, it says, and somewhere below the fold there is a date in 2029 and a line about planning early. You run quality for a 120-person machine shop.

You have an audit booked in March. What you want to know is whether this changes anything you do this quarter.

It does not. But the date worth putting in your calendar is earlier than the 2029 one most of the coverage leads with.

What actually happened on September 16?

Two documents came out the same day, and you need both.

ISO published ISO 9001:2026, the new edition of the standard. It replaces ISO 9001:2015.

Global ACI published the rules for moving across: who has to be ready by when, and the last date anyone can still be certified to the old edition. Most of the coverage so far covers the standard and skips the rules, which is where all the dates are.

Global ACI runs the international accreditation system. It was formed when the International Accreditation Forum merged with ILAC, and it has been running since January 1, 2026. Its transition document is called Global ACI-TECH-3-TR 2029-09-30 (M), if you or your certification body want to look it up.

What do the dates actually require?

Six dates, and only three of them are yours.

Two kinds of organization show up in the table below. Your certification body is the firm that audits you and issues your certificate. The accreditation body is the one that checks your certification body is doing that job properly.

You deal with the first, and you will probably never speak to the second.

The three middle dates belong to those two organizations, not to you. They matter to you for one reason. A certification body that has not finished its own transition cannot audit you against the new edition, so the question for your next call is when they expect to be ready, not whether they already are.

What changed in the standard?

Clearer wording, a shift in emphasis, and one new section.

Global ACI describes the revision as clearer wording, a stronger focus on leadership, quality culture and accountability, and more clarity around risks and opportunities. ISO adds that the standard now follows the common clause structure it uses across its other management system standards, so ISO 9001 lines up more neatly with ISO 14001 and ISO 45001 if you hold those too.

The new section is Annex A. It explains what the requirements are getting at rather than adding any, which makes it the quickest way to understand what changed.

What did not change?

Two things people are already getting wrong.

Climate is not new. An amendment in 2024 already added climate change to ISO 9001:2015, and the 2026 edition keeps it. If someone is selling you a climate readiness project on the strength of the new edition, that change happened two years ago.

Your audit schedule is not changing either. Three-year certificates, a shorter check-in audit in each of the years between, usually called a surveillance audit, and a full one before the certificate runs out. That comes from a different standard, ISO/IEC 17021-1, which sets the rules certification bodies work to.

Revising ISO 9001 does not touch it.

Do you have to do anything this quarter?

No. Nothing is required of you until your certification body comes to you with a plan.

When it does, two questions are worth asking. When will you be able to audit us against the 2026 edition? And which of our scheduled audits in 2027 or 2028 will you use for the transition?

The second question can save you money. The transition can be done during an audit you are already paying for, either a surveillance audit or the full one at the end of the cycle. It can also be done as an extra visit, which costs extra.

What if you are certifying for the first time?

You can still be certified to the 2015 edition until March 31, 2028, and that certificate runs until September 30, 2029.

That is worth knowing if your audit is booked and your documents are built around the 2015 text. But if your first audit falls in 2027 or later, ask to be assessed against the 2026 edition instead. Getting certified to an edition you have to leave within two years means paying for the same work twice.

What if your certificate is not accredited?

Then none of these dates are guaranteed to apply to you.

The transition rules apply to accreditation bodies that have signed up to the Global ACI system, and to the certification bodies they accredit. That covers more than a million ISO 9001 certificates. A certificate issued outside that system runs on whatever schedule its issuer decides.

If your certificate, or one a supplier just sent you, has no accreditation mark on it, ask the issuer what their timetable is rather than assuming it matches the table above.

What we could not verify

Three things, and we would rather say so than gloss over them.

The text of ISO 9001:2026 is sold rather than published free, so every detailed claim about specific clauses, ours included, comes from someone who bought a copy.

We worked from Global ACI's published summary of the transition rules rather than the full document. That is why this page gives you the dates but does not tell you what happens to a certificate that misses September 30, 2029.

And the clause-by-clause breakdowns now appearing are written by certification bodies. They are useful, and they are not the standard.