Microsoft Publisher Is Being Retired: What the October 2026 Deadline Means for Your .PUB Files

Publisher's 35-Year Run Comes to an End

Microsoft Publisher, the entry-level desktop publishing app that has shipped alongside Word and Excel for decades, reaches its end of life in October 2026. Publisher launched in 1991, which makes the retirement the close of a roughly 35-year run.

After the deadline, Publisher will no longer be included in Microsoft 365, and existing on-premises suites that contain it will no longer be supported. The retirement is broad rather than limited to a single release: it covers Publisher for Microsoft 365 as well as Publisher 2021, 2019, 2016, 2013, 2010 and 2007, including Developer editions. If you have Publisher installed anywhere in your organization, this applies to you.

Two Dates to Know: October 1 vs. October 13, 2026

There are two separate deadlines, and which one matters depends on how you licensed Office.

• October 1, 2026 — Microsoft 365 subscribers. Subscribers can continue using Publisher with current functionality until this date. After October 1, they will no longer be able to access Publisher at all, which also means they will no longer be able to open or edit .pub files in it.
• October 13, 2026 — perpetual licenses. Support for the perpetual version of Publisher ends on this date, which is when Office LTSC 2021 and Consumer Office 2021 both reach end of support.

For most organizations on subscription licensing, October 1 is the date that counts — and it arrives nearly two weeks earlier than the one that tends to get quoted alongside the broader Office 2021 end-of-support milestone.

What Happens to Perpetual Office 2021 Installs

Perpetual copies of Publisher — those that came with Office 2021 or Office LTSC 2021 — behave differently from the subscription version. The application will keep working after the deadline: users can still create, open and edit files.

That is a reprieve, not a solution. After October 13, 2026, the software receives no updates at all, including security updates, and no technical support will be available. An unpatched desktop publishing app that routinely opens files received from outside the organization is a security and reliability liability, not a long-term plan. Treat a working perpetual install as extra runway for migration rather than a reason to skip it.

The .PUB File Problem

Microsoft is not deleting anyone's files. Existing .PUB documents will remain exactly where they are, on local drives and in cloud storage, untouched.

The problem is that they become effectively stranded. The PUB format has always been close to proprietary in practice, and most other desktop publishing software cannot open it. Once the application that reads a format goes away, the format's contents go with it — so anything still sitting in .pub form after the cutoff is at risk of becoming unreadable for subscription users who no longer have Publisher to open it with.

Microsoft's Recommended Migration Path

Microsoft's guidance is straightforward: convert existing Publisher files to another format before October 1, 2026.

• View-only documents: Use File > Save As > PDF. For newsletters, flyers, programs and other material that only needs to be read or reprinted, PDF preserves the layout and is universally readable.
• Large collections: Bulk conversion can be automated with PowerShell, which is the practical option when a department has hundreds or thousands of .pub files scattered across shared storage.
• Documents that still need editing: Microsoft's suggested path is to convert the Publisher file to PDF and then open that PDF in another Microsoft app, such as Word. Expect to do some cleanup — a round trip through PDF is a conversion, not a perfect translation — so budget time for reformatting the publications you genuinely intend to keep editing.

Replacing Publisher Workflows in Word and PowerPoint

Microsoft's position is that the work people actually did in Publisher is already covered elsewhere in Microsoft 365. The common scenarios it calls out — branded templates, envelopes and labels, calendars, business cards and programs — are available in other apps, principally Word and PowerPoint.

Templates for those scenarios are published on Microsoft Create, which is the natural first stop for anyone rebuilding a recurring Publisher document. In practice, Word is the better landing spot for text-heavy, flow-based publications such as newsletters and label runs, while PowerPoint's free-form canvas suits layout-driven pieces where precise placement of images and text boxes matters more than paragraph flow.

An Action Plan for IT Teams and Organizations

The migration itself is not technically difficult. The hard part is discovery — finding every .pub file before the people who created them need them.

• Inventory. Search for .pub files across local computers, OneDrive, SharePoint and shared departmental storage. Files in long-forgotten team shares are the ones most likely to surface as emergencies later.
• Triage. Sort each file into one of three buckets: active, archived, or no longer needed. The third bucket is usually larger than anyone expects, and deleting it is free progress.
• Convert by priority. Send active publications to editable formats so they can still be maintained, and push archive-only material straight to PDF.
• Work backward from October 1, 2026. Plan against the subscription cutoff, not the October 13 perpetual date. If any part of your estate is on Microsoft 365, October 1 is when the tool you need to do the conversion disappears.

Organizations that still have a perpetual Office 2021 install somewhere have a useful fallback: a machine that can still open .pub files after the subscription cutoff is a handy conversion workstation — provided it is used deliberately and for a limited time, given that it will no longer receive security updates.