Office 2019, 2021 and 2024 look almost identical when you open them, and the price differences are small — so what actually separates them? Here’s an honest comparison: the real feature differences, how long each is supported, and how to decide.
Quick verdict
| Office 2019 | Office 2021 | Office 2024 | |
|---|---|---|---|
| Released | 2018 | 2021 | 2024 |
| Dark mode | Limited | Full | Full |
| Excel XLOOKUP & dynamic arrays | No | Yes | Yes |
| Real-time co-authoring | No | Yes | Yes |
| Security updates until | Ended Oct 2025 | Oct 2026 | Oct 2029 |
| Publisher included | Yes | Yes | No |
| Best for | Tightest budget | Mid option | Most buyers |
Support status — read this first
This matters more than any feature, and most comparison articles skip it:
- Office 2016 and Office 2019 — support ended 14 October 2025. No further security updates.
- Office 2021 — support ends 13 October 2026.
- Office 2024 — supported until October 2029.
What does “end of support” mean in practice? The software keeps working exactly as before — your files open, everything runs. What stops is security patching. For a suite that opens documents from email and the web that’s a real, if gradual, risk, and some workplaces won’t allow unsupported software for compliance reasons.
Plenty of people knowingly buy an older release because it does the job at a lower price. That’s a legitimate choice — just make it with the facts in front of you.
What Office 2021 added over 2019
Excel got the biggest upgrade
- XLOOKUP — the modern replacement for VLOOKUP. Searches in any direction, handles “not found” cleanly, no column-counting.
- Dynamic arrays — one formula spills results across multiple cells automatically (
FILTER,SORT,UNIQUE,SEQUENCE). - XMATCH and LET — cleaner, faster formulas.
If you work in spreadsheets regularly, these change how you build them. Office 2019 simply doesn’t have them.
Collaboration and interface
- Real-time co-authoring — see other people’s edits appear live when a file is in OneDrive or SharePoint. Office 2019 requires taking turns.
- Full dark mode, including the document page itself.
- Line Focus in Word, visual refresh, and faster opening of large files.
What Office 2024 adds on top
Office 2024 is an incremental step over 2021 rather than a reinvention — but it carries the longest support window of any perpetual Office, and that’s the point:
- Five more years of security updates (to October 2029) — the single biggest practical difference.
- Refreshed interface and further performance work.
- Improved Excel data analysis and additional functions.
- Better accessibility tooling across the suite.
One thing to know: Office 2024 Professional Plus includes Word, Excel, PowerPoint, Outlook, Access and OneNote — but not Microsoft Publisher, which was included in 2019 and 2021. If you rely on Publisher, that’s a genuine reason to stay on 2021.
Perpetual Office or Microsoft 365?
There’s a third option worth weighing. A perpetual release (2019, 2021, 2024) is a fixed version — it stays as it is. Microsoft 365 keeps updating with new features, stays supported continuously, and includes cloud storage.
- Want a fixed version installed on your PC? Choose a perpetual release.
- Want to always be on the current version? Choose Office 365 Pro Plus.
Full comparison in Office 2021 vs Microsoft 365.
So which should you buy?
- Most people → Office 2024. It has security updates until October 2029, so you won’t be repeating this decision soon.Office 2024 Pro Plus
- Need Publisher, or want a middle option → Office 2021. Office 2021 Pro Plus · 2021 Pro Plus (Phone Activation)
- Tightest budget, basic Word/Excel use → Office 2019. Still opens and edits everything. Office 2019 Pro Plus
- Want continuous updates → Office 365 Pro Plus.
- On a Mac? Different editions apply — see Office 2021 for Mac and our Mac setup guide.
Every key is genuine, delivered instantly on your order confirmation page, and backed by our 7-day activation warranty. Browse everything in Office, or read which Microsoft Office to buy if you’re still weighing it up.
Frequently Asked Questions
Is Office 2024 worth it over Office 2021?
Mainly for the support window — Office 2024 receives security updates until October 2029, while Office 2021 support ends in October 2026. Feature differences are modest.
Is Office 2021 worth it over Office 2019?
Yes for most people, mainly because of Excel’s XLOOKUP and dynamic arrays, real-time co-authoring and full dark mode.
Does Office 2024 include Publisher?
No. Office 2024 Professional Plus includes Word, Excel, PowerPoint, Outlook, Access and OneNote. Publisher was included in Office 2019 and 2021 but is not part of Office 2024.
Can I install a newer Office over an older one?
Uninstall the older version first. Running two perpetual versions side by side causes activation and file-association problems.
Will my old files still work?
Yes. The file formats (.docx, .xlsx, .pptx) are unchanged, so everything opens normally.