Office 2021 vs Office 2019 Professional Plus: Which Is Better in 2026?
If you are comparing Office 2021 Professional Plus with Office 2019 Professional Plus in 2026, the biggest difference is no longer simply features.
The most important difference is Microsoft support.
Office 2019 is already outside Microsoft support. Support ended in October 2025.
Office 2021 is also approaching end of support. Microsoft support ends on 13 October 2026.
If you are buying Office today for a new long-term installation, neither version should automatically be your first choice. A supported Office 2024 edition is normally the better starting point unless you specifically need Office 2019 or Office 2021 for compatibility reasons.
Quick answer: Office 2021 is the stronger of the two older releases. It adds newer Excel functions such as XLOOKUP, XMATCH, LET and Dynamic Arrays, improved PowerPoint tools, better search and several performance and accessibility improvements. However, with Office 2021 support ending in October 2026, the more important question for a new purchase is whether you should move to Office 2024 instead.
Office 2021 vs Office 2019: Quick Comparison
| Feature | Office 2019 | Office 2021 |
|---|---|---|
| Release generation | 2018 | 2021 |
| Microsoft support status in September 2026 | Support ended | Supported until 13 October 2026 |
| Subscription required | No | No |
| Core desktop Office applications | Yes, depending on edition | Yes, depending on edition |
| XLOOKUP in Excel | No | Yes |
| Dynamic Arrays | No | Yes |
| LET function | No | Yes |
| XMATCH | No | Yes |
| Improved PowerPoint recording tools | Older feature set | Yes |
| Improved Outlook search and Translator | Older feature set | Yes |
| Ongoing new feature additions | No | No |
| Best choice for a completely new long-term installation in 2026 | No | Usually no — consider Office 2024 |
Office 2021 is better than Office 2019 when comparing the two directly. But being the newer of two older releases does not necessarily make it the best Office version to buy today.
The Biggest Difference in 2026: Microsoft Support
Older comparisons between Office 2019 and Office 2021 focused heavily on features and interface changes.
In September 2026, lifecycle is more important.
Office 2019
Microsoft support for Office 2019 ended in October 2025.
It no longer receives Microsoft's normal security updates, bug fixes or technical support.
Office 2021
Microsoft support for Office 2021 ends on 13 October 2026.
After that date it will no longer receive Microsoft's normal security fixes, bug fixes or technical support.
Does Office stop working when support ends?
No.
End of support does not normally disable Word, Excel, PowerPoint or the other installed applications.
The difference is that Microsoft stops providing the normal servicing and security support for that Office generation.
“Still works” and “still supported” are not the same thing. This distinction is especially important on business PCs, systems handling customer information or computers connected to the internet.
Do Office 2019 and Office 2021 Include the Same Applications?
This depends on the exact edition purchased.
Professional and Professional Plus editions commonly include applications such as:
- Microsoft Word.
- Microsoft Excel.
- Microsoft PowerPoint.
- Microsoft Outlook.
- Microsoft Access on applicable Windows editions.
- Publisher on applicable older editions.
The important point is that the year alone does not tell you which applications are included.
For example, Office Home & Student, Home & Business, Professional and Professional Plus do not necessarily contain the same applications even when they belong to the same Office generation.
Always compare the actual Office edition as well as the year. Someone who needs Outlook or Access should not choose an edition based only on whether it says 2019, 2021 or 2024.
Office 2021 vs Office 2019: Excel Differences
Excel is one of the areas where Office 2021 introduced genuinely useful improvements over Office 2019.
Microsoft added several newer functions and data-handling features to Excel 2021.
XLOOKUP
XLOOKUP provides a more flexible way to find information in tables and ranges and can replace many traditional VLOOKUP and HLOOKUP formulas.
Dynamic Arrays
Excel 2021 introduced Dynamic Array functionality with functions including FILTER, SORT, SORTBY, UNIQUE, SEQUENCE and RANDARRAY.
LET
The LET function allows names to be assigned to calculation results inside a formula, helping make complex formulas easier to build and understand.
XMATCH
XMATCH can search a range or array and return the relative position of an item.
These differences matter particularly if you regularly receive spreadsheets created using newer Excel functions.
Compatibility matters. A workbook containing newer Excel functions can behave differently when opened in an older Excel version that does not support those functions.
Is Office 2021 worth it just for Excel?
Between Office 2019 and Office 2021, Excel power users have one of the strongest reasons to prefer Office 2021.
XLOOKUP, Dynamic Arrays and LET can significantly change how modern spreadsheets are built.
However, if you are buying specifically for these newer capabilities in late 2026, it also makes sense to compare Office 2024 rather than stopping the comparison at Office 2021.
Word 2021 vs Word 2019
The fundamental Word experience is familiar in both versions.
You can create and edit:
- Documents.
- Letters.
- Reports.
- Templates.
- Tables.
- Mail merges.
- PDF exports.
Office 2021 introduced a range of usability, accessibility, inking and search improvements across the Office applications.
For someone doing basic document creation, the difference between Word 2019 and Word 2021 may feel much smaller than the difference between the two versions of Excel.
Do not upgrade solely because the Word interface looks slightly newer. The stronger reasons to move away from Office 2019 are lifecycle, security and compatibility with newer Office files and features.
PowerPoint 2021 vs PowerPoint 2019
PowerPoint 2021 introduced several improvements beyond the 2019 feature set.
Microsoft highlights features including:
- Improved slide-show recording.
- Presenter video recording.
- Ink recording.
- Laser-pointer recording.
- Ink Replay and Rewind animations.
- Additional drawing tools.
- Improved accessibility controls.
- Support for entering Hex colour values.
These features can be useful if you regularly create recorded presentations, training material or more sophisticated slides.
Some collaboration features differ between retail Office 2021 and Office LTSC 2021. Do not assume every product carrying the “Office 2021” name has an identical cloud-collaboration feature set.
Outlook 2021 vs Outlook 2019
Outlook 2021 added several improvements over Outlook 2019, including:
- Search positioned prominently at the top of Outlook.
- Improved search functionality.
- Built-in translation tools.
- Inking and annotation improvements.
- Additional media and colour tools.
For normal email use, Outlook 2019 remains recognisable and functional.
However, the support status is again the bigger issue in 2026. Outlook is an internet-connected application handling email and potentially sensitive information, making continued use of an unsupported Office version more significant than it might be for an isolated desktop application.
Is Office 2021 Faster Than Office 2019?
Microsoft documented performance, stability and speed improvements across Word, Excel, PowerPoint and Outlook in Office 2021.
Excel 2021 also included faster calculations for some commonly used functions.
That does not mean Office 2021 will transform the performance of every PC.
Office performance also depends heavily on:
- Processor speed.
- Available RAM.
- Whether the PC uses an SSD or mechanical hard drive.
- Document and workbook complexity.
- Office add-ins.
- Other software running at the same time.
A slow old PC does not automatically become fast because Office 2021 replaces Office 2019. Hardware and Windows performance still matter.
What About Collaboration and OneDrive?
This area needs more care than older Office comparisons often suggest.
Office 2021 introduced newer collaboration features including co-authoring in supported retail configurations.
However, Microsoft specifically notes that some collaboration functionality is not available in Office LTSC 2021.
Do not confuse Office 2021 with Microsoft 365. Microsoft 365 is a subscription service with continuing feature updates and cloud-connected functionality. Office 2021 is a fixed-generation Office release.
If real-time collaboration, continuous feature updates and Microsoft's latest cloud-connected Office functionality are central to your work, Microsoft 365 is a different comparison entirely.
File Compatibility Between Office 2019 and Office 2021
Both versions use the modern Office file formats that most users recognise:
- .docx for Word documents.
- .xlsx for Excel workbooks.
- .pptx for PowerPoint presentations.
Normal documents can usually move between the two generations.
The problems arise when a newer Office feature is used that the older version does not understand.
Excel is the clearest example
If someone creates a workbook using XLOOKUP, Dynamic Arrays, LET or another newer function, an older Excel version may not calculate or display the workbook as intended.
This can matter in businesses where different employees use different Office generations.
If several PCs regularly share the same Office files, keeping them on reasonably consistent Office generations can reduce compatibility problems.
Office 2019 vs Office 2021 on Windows 10
Windows itself also needs to be considered.
Normal support for Windows 10 ended in October 2025.
This means installing an older Office release onto an unsupported Windows 10 PC can leave you with both an unsupported operating system and an unsupported or nearly unsupported Office suite.
For a new Office installation in 2026, consider the complete PC rather than the Office licence alone. Check the Windows version, hardware compatibility and Office support lifecycle together.
Should You Upgrade From Office 2019 to Office 2021?
In previous years, the answer would often have been yes.
In September 2026, it is more complicated.
Office 2021 is clearly newer and has useful improvements over Office 2019, but its Microsoft support ends in approximately six weeks.
Do you need to move?
If you need a supported Office environment, yes — Office 2019 is already outside support.
But moving from Office 2019 to Office 2021 in late 2026 gives you very little remaining support time.
Can you keep using it?
Office 2021 can continue working after October 2026, but normal Microsoft security updates and support will end.
Plan your next Office version rather than waiting until a problem forces the decision.
If you are upgrading specifically to regain Microsoft support, moving from Office 2019 to Office 2021 now is difficult to justify as a long-term upgrade. A supported Office 2024 edition is normally the stronger non-subscription route.
What About Office 2024?
Office 2024 changes the recommendation considerably.
Microsoft's current Office 2024 and Office LTSC 2024 generations are supported until October 2029.
That gives a new Office 2024 installation considerably more remaining Microsoft support than either Office 2019 or Office 2021.
Unsupported
Best treated as a legacy or compatibility option where the 2019 generation is specifically required.
Support ends October 2026
Still useful in existing environments, but not an ideal new long-term deployment.
Supported until October 2029
The more sensible starting point for most new non-subscription Office installations.
For a direct current-generation comparison, see our:
You can also compare the Microsoft Office 2024 editions available from EcoKeys.
Office 2021 or Office 2019: Which Should You Choose?
If your choice is genuinely limited to these two versions, Office 2021 is the better Office release.
It provides:
- Newer Excel functionality.
- Improved PowerPoint tools.
- Newer Outlook functionality.
- Performance and stability improvements.
- Better support for modern Office workflows.
- A newer application generation overall.
However, that is no longer the complete buying decision.
Choose Office 2019 only when
- You specifically need Office 2019 for compatibility.
- You are maintaining an established Office 2019 environment.
- An older workflow or application depends on that generation.
Remember: Microsoft support has already ended.
Choose Office 2021 only when
- You specifically require the 2021 generation.
- You are matching an existing Office 2021 environment.
- A particular workflow requires Office 2021.
Remember: Microsoft support ends in October 2026.
Choose Office 2024 when
- You are setting up a new PC.
- You want a current non-subscription Office generation.
- You do not have a specific 2019 or 2021 compatibility requirement.
Support: current through October 2029.
For most new purchases in September 2026, Office 2024 is the more logical comparison. Office 2019 and Office 2021 remain relevant primarily for legacy, compatibility and existing-environment requirements.
Related Office Guides
Frequently Asked Questions
Is Office 2021 better than Office 2019?
Yes when comparing the two releases directly. Office 2021 includes newer Excel functions, improved PowerPoint tools, Outlook improvements and performance enhancements. However, Office 2021 itself reaches end of support in October 2026.
Is Office 2019 still supported?
No. Microsoft support for Office 2019 ended in October 2025. Office 2019 can continue to operate, but it no longer receives Microsoft's normal security updates, bug fixes or technical support.
When does Office 2021 support end?
Microsoft support for Office 2021 ends on 13 October 2026. After that date Microsoft will no longer provide normal security updates, bug fixes or technical support for Office 2021.
Does Office 2021 have XLOOKUP?
Yes. Excel 2021 includes XLOOKUP along with newer functions and capabilities including XMATCH, LET and Dynamic Arrays.
Does Office 2019 have XLOOKUP?
No. XLOOKUP was introduced in later Excel generations and is one of the significant spreadsheet differences between Office 2019 and Office 2021.
Do Office 2019 and Office 2021 require a subscription?
No. Both generations were offered as non-subscription Office releases. Microsoft 365 is a separate subscription service.
Will Office 2021 stop working in October 2026?
End of support does not normally disable the installed Office applications. The important change is that Microsoft stops providing its normal security updates, bug fixes and technical support.
Should I upgrade Office 2019 to Office 2021 in 2026?
Usually not if the purpose is to move to a supported long-term Office version. Office 2021 support ends in October 2026, so Office 2024 is normally a more logical upgrade unless you specifically require Office 2021.
Should I buy Office 2021 or Office 2024?
For most new non-subscription installations in late 2026, Office 2024 is the stronger long-term choice because Microsoft support continues through October 2029. Office 2021 may still be relevant where a specific 2021 environment is required.
Can Office 2019 open Office 2021 files?
Both generations use the normal modern Word, Excel and PowerPoint file formats. However, files using newer Office 2021 features — particularly newer Excel functions — may not behave correctly in Office 2019.
Which Office version should I choose for a new PC?
If you do not have a specific compatibility requirement for Office 2019 or Office 2021, a supported Office 2024 edition is normally the better starting point for a new non-subscription Office installation in 2026.
