Microsoft is reminding Office 2021 users that support ends next month

Microsoft is issuing a fresh reminder to anyone still running Office 2021: your clock is ticking. The company is nudging users of the perpetual-license suite to plan for what comes next, since extended support for Office 2021 is set to end in less than a month.

What’s happening and when

According to Microsoft’s published support lifecycle, extended support for Office 2021 (also sold as Office LTSC 2021 for organizations) ends on October 14, 2025. After that date, the software reaches its official end of life, meaning Microsoft will stop providing free updates, including non-security fixes, and the product is no longer covered under standard support agreements.

This isn’t a surprise announcement dropped out of the blue. Microsoft typically sends reminder notifications and posts lifecycle notices well in advance, but the company is clearly pushing users toward the exit as the date approaches. The message is straightforward: if you’re still on Office 2021, now is the time to decide your next move.

A close-up of hands typing on a laptop keyboard with a productivity app faintly visible on screen, warm office lighting, — Users can still open and run their Office 2021 documents after the cutoff date.

What Office 2021 actually is

Office 2021 is the most recent version of Microsoft’s Office suite that you buy outright rather than subscribe to. Unlike Microsoft 365 (formerly Office 365), which runs on a recurring subscription and gets a steady stream of new features, Office 2021 uses a perpetual license. You pay once, and you get a fixed set of features—Word, Excel, PowerPoint, Outlook, and others—that won’t change for the life of the product.

For many home users and smaller organizations, that one-time purchase model is more appealing than a monthly or yearly fee. It was released in late 2021 as the successor to Office 2019, and it’s the version that fits people who want current Office apps without committing to a subscription.

It’s worth noting that Office 2021 doesn’t receive the rolling feature updates that Microsoft 365 subscribers enjoy. Instead, it follows a more traditional support timeline, with a mainstream support phase followed by an extended support phase. Mainstream support for Office 2021 ended in October 2023, which is why the October 2025 date marks the end of the extended phase.

What changes after support ends

Once Office 2021 reaches end of support, the practical differences for most users come down to a few key points:

No more updates: Microsoft will stop delivering free updates, including non-security patches. In practice, this means any bugs discovered after the cutoff won’t be fixed by Microsoft.
No security patches: This is the biggest concern. Without security updates, a newly discovered vulnerability in Office 2021 would leave you exposed, since Microsoft won’t be issuing a fix.
Possible compliance gaps: For businesses, running software past its supported life can create issues with IT policies, audits, and industry compliance requirements.

The apps themselves will still open and run—you won’t suddenly lose access to your documents. But you’ll be running a product that no longer receives protection from Microsoft, which becomes a growing risk as time goes on.

What this means for you

If you’re a home user who relies on Office 2021 for everyday tasks, the immediate impact is minimal. Your documents will still open, and your installed apps will keep working. The real question is whether you’re comfortable running software that no longer gets security updates, especially if you open emails and attachments from unknown senders.

For organizations, the calculus is different. IT teams should treat this as a planning item, not an emergency. The key is to decide on a path forward before October 14, 2025, so there’s no gap in coverage.

What are your options?

Microsoft lays out a few paths for Office 2021 users facing the cutoff:

Move to Microsoft 365: The subscription version keeps getting new features and, crucially, continuous security updates. This is Microsoft’s recommended route for most users.
Wait for Office LTSC 2025: For organizations that prefer the perpetual-license model, Microsoft has announced a next-generation long-term servicing channel version on the horizon. This is the enterprise successor to Office LTSC 2021, though the exact release timing hasn’t been pinned down.
Explore alternatives: Free or lower-cost options like Microsoft’s web-based Office apps, LibreOffice, or Google Workspace can fill the gap for users who don’t need the full desktop suite.

A split-screen concept showing a subscription icon with a recurring arrow next to a one-time purchase receipt, on a mini — Microsoft 365 subscriptions offer continuous updates, unlike the one-time Office 2021 license.

For most people, the simplest and most future-proof choice is Microsoft 365, since it guarantees you’ll always be on a supported, up-to-date version. But if you specifically want to avoid a subscription, keeping an eye on the LTSC release schedule is the way to go.

Bottom line: Office 2021 isn’t going anywhere overnight, but the clock is running. Take a look at how you use Office, weigh your options now, and make a plan before the October 14, 2025 cutoff—rather than being caught off guard when support actually ends.

Source: Neowin

Over to you: Are you switching to a Microsoft 365 subscription, or will you hold out for the perpetual-license Office LTSC 2025?