Is Office 2021 Still Worth Buying in 2026?
The short answer: for most people making a new Office purchase in September 2026, Office 2024 is the better long-term choice. Microsoft support for Office 2021 ends on 13 October 2026, leaving very little supported life remaining.
Office 2021 will not suddenly stop opening after that date, but Microsoft will no longer provide security updates, bug fixes or technical support. Office 2021 can still make sense for a specific short-term or compatibility requirement, but it is difficult to recommend for a new installation intended to be used for several years.
Important: Microsoft has confirmed that Office 2021 support ends on 13 October 2026. There will be no support extension and no Extended Security Updates for Office 2021. You can read the official Microsoft end-of-support notice.
Is Office 2021 Still Worth Buying in 2026?
Office 2021 is still a capable desktop Office suite, but whether it is worth buying now depends heavily on how long you intend to use it.
Office 2021 may still make sense if...
- You need it for a particular existing setup.
- You only expect to use it for a short period.
- You specifically require an Office 2021-era application or workflow.
- You fully understand the October 2026 support deadline.
Office 2024 is usually better if...
- You are buying Office for a new PC.
- You intend to use the software for several years.
- You want a longer remaining support period.
- You want the newer perpetual Office feature set.
For a new purchase intended for everyday or business use beyond October 2026, the short remaining support period is now the biggest disadvantage of Office 2021.
What Happens to Office 2021 After 13 October 2026?
Office 2021 does not contain a switch that disables Word, Excel or PowerPoint when support ends.
Microsoft says the applications may continue to function, but after the support deadline you should no longer expect:
- security updates for newly discovered Office 2021 vulnerabilities
- bug fixes
- Office 2021 software updates
- Microsoft technical support
- continuing updates to Microsoft support documentation for the product
End of support does not mean end of activation. An existing Office 2021 installation may continue to work. The issue is that unsupported software becomes progressively less suitable for security-sensitive or long-term use.
Is It Safe to Keep Using Office 2021 After Support Ends?
That depends on what the computer is used for and the level of risk you are prepared to accept.
An unsupported Office application can still open documents, but newly discovered security weaknesses will no longer be corrected through normal Microsoft Office 2021 security updates.
This matters more on computers used for:
- business documents
- customer or employee information
- financial spreadsheets
- email attachments
- documents downloaded from the internet
- shared network or cloud files
For those uses, moving to a supported Office version is the more sensible long-term option.
What Is Included in Office 2021 Professional Plus?
Office 2021 Professional Plus for Windows provides the familiar desktop Office applications used for documents, spreadsheets, presentations, email and database work.
The main applications associated with Office Professional Plus 2021 include:
Word
Documents, letters, reports and other word-processing tasks.
Excel
Spreadsheets, formulas, calculations, charts and data analysis.
PowerPoint
Presentations, slides and visual content.
Outlook
Email, calendar, contacts and related desktop tools.
Access
Desktop relational databases on compatible Windows PCs.
Publisher
Desktop publishing, although Publisher itself is also being retired in October 2026.
For more detail about the applications, see our what is included in Office 2021 Professional Plus guide.
Useful Features in Office 2021
Office 2021 introduced several useful improvements over earlier perpetual releases such as Office 2016 and Office 2019.
Excel improvements
Excel 2021 introduced or expanded support for modern functions and dynamic arrays, including:
- XLOOKUP
- FILTER
- SORT
- UNIQUE
- LET
- dynamic array formulas
For users moving from much older versions of Excel, these can still represent a substantial improvement.
Word and PowerPoint improvements
Office 2021 also introduced updated commenting, accessibility improvements, additional PowerPoint recording and presentation tools, and interface changes designed to work more naturally with newer Windows releases.
Perpetual rather than subscription-based
Office 2021 is a perpetual Office release rather than a Microsoft 365 subscription. It does not automatically become Office 2024 and does not receive the continuous stream of new features supplied to Microsoft 365 subscribers.
Reasons Someone Might Still Choose Office 2021
There are still some situations where Office 2021 may meet the requirement.
- Existing compatibility: a business may have systems or workflows already tested specifically with Office 2021.
- Short-term requirement: the software may only be needed temporarily.
- Familiar feature set: users may not need newer Office 2024 features.
- Perpetual desktop software: some users prefer a fixed Office release rather than Microsoft 365.
The issue is not that Office 2021 suddenly became poor software. The issue is that its remaining supported lifespan is now extremely short.
Office 2021 vs Office 2024 in 2026
If you are choosing between them today, our Office 2024 vs Office 2021 comparison goes into the differences in more detail.
What About Office 2021 vs Microsoft 365?
Office 2021 and Microsoft 365 use very different purchasing models.
Office 2021 is a fixed perpetual desktop release. Its feature set remains broadly fixed and its support lifecycle has a defined end date.
Microsoft 365 is a subscription service. Depending on the plan, it can provide continuously updated Office applications, cloud storage and additional connected services.
If you do not want a subscription but need a newer supported version, Office 2024 is the closer replacement for Office 2021.
What About Microsoft Publisher?
Publisher is an additional consideration for some Office 2021 users.
Microsoft is retiring Publisher in October 2026. The perpetual Publisher supplied with Office 2021 reaches the end of support alongside Office 2021 on 13 October 2026.
If you have important Publisher files, now is the time to review how those files will be archived, converted or recreated before depending on Publisher beyond its supported lifetime.
What if You Use Office 2021 on Windows 10?
There is a second support issue to consider if the PC is still running Windows 10.
Standard support for Windows 10 ended on 14 October 2025. Microsoft’s Office and Windows support matrix also lists Office LTSC 2021 on Windows 10 as reaching the end of its supported configuration in October 2025.
Windows 10 users: Office 2021 may still install and run, but that does not mean the overall Windows and Office configuration remains supported. Check the Windows support and Extended Security Updates position separately before relying on the PC for long-term or security-sensitive use.
Who Might Office 2021 Still Suit?
Office 2021 can still be a reasonable choice when:
- you specifically need compatibility with an existing Office 2021 environment
- you only intend to use the software for a limited period
- you understand and accept the October 2026 support deadline
- you do not require the newer Office 2024 feature set
- price or compatibility makes Office 2021 preferable for a specific requirement
It is much harder to recommend when the software will be used for several years or for business information that needs a supported security environment.
Frequently Asked Questions
Will Office 2021 stop working on 13 October 2026?
No. Microsoft says Office 2021 applications may continue to function after support ends. The important difference is that Microsoft will no longer provide security fixes, bug fixes or normal technical support.
Will Office 2021 still activate after support ends?
End of support does not itself mean that existing installations are automatically deactivated. Activation rights still depend on the particular licence and activation method being used.
Does Office 2021 receive Extended Security Updates?
No. Microsoft states that there will be no extension and no Extended Security Updates for Office 2021 after 13 October 2026.
Is Office 2021 a subscription?
No. Office 2021 is a perpetual Office release rather than a recurring Microsoft 365 subscription.
Does Office 2021 automatically upgrade to Office 2024?
No. Office 2024 is a separate Office release with its own licence. Office 2021 does not become Office 2024 through a normal update.
Is Office 2024 also a subscription?
No. Office 2024 is also available as a perpetual Office release. Microsoft 365 is the subscription-based alternative.
How long is Office 2024 supported?
Microsoft lists support for Office LTSC 2024 through October 2029, giving it substantially more remaining supported life than Office 2021.
Our Verdict: Should You Buy Office 2021 in 2026?
Office 2021 remains capable software, but its support deadline is now too close to ignore.
For most people purchasing Office for a new Windows PC in September 2026, Office 2024 is the stronger long-term choice. It has a newer feature set and remains supported until October 2029.
Office 2021 still has a place where cost, compatibility or a short-term requirement makes it the better fit, but buyers should make that decision knowing that Microsoft support ends on 13 October 2026.
Still need Office 2021 Professional Plus?
If you have considered the support deadline and Office 2021 still meets your requirements, review the applications, compatibility and licence information on our Office 2021 Professional Plus product page.
