Microsoft has set October 13, 2026 as the last day of security updates for the 2021 editions of Office, a retirement that covers Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher, Project and Visio in their perpetual-licence form. After that date the company stops shipping security patches, non-security fixes and technical support for them, and does not offer a paid extension.
The date applies to two related but separate product lines, and the distinction matters for anyone checking a licence. Office 2021 is the consumer and small-business package sold once, without a subscription. Office LTSC 2021 is the volume-licensed build that organizations deploy on locked-down machines. Both run out on the same day, while the Microsoft 365 subscription apps follow a different, open-ended schedule.
Microsoft’s 2026 end-of-support list names both 2021 lines
The controlling document is Microsoft’s own list of products ending support in 2026 on Microsoft Learn. Under October 13, 2026 it places Access 2021, Excel 2021, Office 2021, OneNote 2021, Outlook 2021, PowerPoint 2021, Project 2021, Publisher 2021, Visio 2021 and Word 2021 in the retiring group, and then lists a second group, flagged as ending support under the Fixed Lifecycle Policy: Access, Excel, OneNote, Outlook, PowerPoint, Publisher, Visio and Word in their LTSC 2021 forms, Project 2021 (LTSC), Office LTSC 2021 and Office LTSC 2021 for Mac.
The same page states what retirement means in practice: no new security updates, no non-security updates, no free or paid assisted support, and no refreshed online technical content.
Home, Business and Professional editions in the Office 2021 lifecycle entry
Microsoft’s lifecycle entry for Office 2021 shows a start date of October 5, 2021 and covers Home and Business, Home and Business for Mac, Home and Student, Home and Student for Mac, and Professional. It places the product under the Modern Lifecycle Policy with a fixed five-year window. One detail trips up date-checkers: the entry carries a retirement timestamp of 10/14/2026 at 6:59:59 AM Pacific, a time-zone artifact of how the lifecycle database records its cut-off. Microsoft’s own end-of-support list and its consumer support article both state October 13, which is the date customers should plan around.
The consumer-facing explanation sits in a Microsoft Support article on the end of support for Office 2021. It states that support for Office 2021 ends on October 13, 2026, with no extension and no extended security updates on offer, and it names Office Home & Student 2021 and Office Home & Business 2021 among the affected packages. The article also says the installed apps may keep functioning after the cut-off, which is a reason the retirement can pass unnoticed: nothing stops launching on October 14. What stops is the flow of patches, so any vulnerability found afterward in Word, Excel or Outlook stays open on those machines. Microsoft’s own wording on this point is that people who stay put “could expose yourself to serious and potentially harmful security risks,” and its recommended path for home users is to move to a newer version of Office or to Microsoft 365.
Office LTSC 2021 carries the same end date under a stricter policy
Organizations running the long-term-servicing build face the same date with less flexibility. The lifecycle entry for Office LTSC 2021 lists a start date of September 16, 2021, covers the Standard and Standard for Mac editions, and applies the Fixed Lifecycle Policy, which has a defined end date and no extended-support phase after mainstream support. The same 6:59:59 AM Pacific timestamp on October 14 appears there as well, again alongside Microsoft’s published October 13 end-of-support date.
The Fixed Lifecycle Policy promises a minimum of five years of mainstream support from launch, during which security and non-security updates and paid support are available. Once mainstream support ends and no extended phase follows, only the Extended Security Update route could in theory apply, and Microsoft’s Office 2021 notice says no such program exists for this product. For IT teams the arithmetic is simple: Office LTSC 2021 images need to be replaced, or the machines carrying them accepted as unpatched, by that October date.
Microsoft 365 Apps stay in support while the perpetual editions retire
The subscription apps are a different product with a different clock. Microsoft’s lifecycle page for Microsoft 365 Apps shows a start date of September 22, 2015 and the status “In Support,” with no retirement date, under the Modern Lifecycle Policy. Naming Microsoft 365 as part of the October 13 cutoff would therefore be wrong; the date belongs to the perpetual 2021 editions and their LTSC counterparts only.
The same Microsoft list is a crowded one for that Tuesday. Windows 10 2016 LTSB and Windows 10 IoT Enterprise LTSB 2016 end support, Windows 11 Home and Pro version 24H2 ends support, and Windows Server 2012 and 2012 R2 reach the third year of their paid Extended Security Updates. Windows Server 2022 moves from mainstream into extended support the same day, which is a change of phase rather than a cutoff. For households with a copy of Office Home & Student 2021, the practical sequence is to confirm the edition on the box or the account page, then compare it against the October 13 entry on Microsoft’s list.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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