Microsoft Office 2024 and Office 2021 are both one-time purchase versions of Microsoft Office — no subscription needed. But they’re not identical. This guide compares features, support timelines, and pricing so you can pick the right version for your situation.
Quick Answer
- Want the latest + longest support: Office 2024 Professional Plus — supported until 2029
- Need to save money: Office 2021 LTSC Professional Plus — lower price, supported until Oct 2026
- Mac user: Office 2024 Home & Business for Mac
- Multiple PCs: Office 2024 Pro Plus 3-Device bundle for best per-seat value
Feature Comparison
| Feature | Office 2021 | Office 2024 |
|---|---|---|
| Apps included (Pro Plus) | Word, Excel, PowerPoint, Outlook, Access, Publisher | Word, Excel, PowerPoint, Outlook, Access, Publisher |
| Mainstream support | Until Oct 2026 | Until Oct 2029 |
| Extended support | Until Oct 2026 | Until Oct 2029 |
| XLOOKUP in Excel | Yes | Yes |
| Dynamic arrays (Excel) | Yes | Yes (enhanced) |
| LET & LAMBDA functions | Limited | Full support |
| Improved accessibility | Good | Best |
| Dark mode | Yes | Yes (improved) |
| Performance | Good | Improved |
| AI features (Copilot) | No | Limited (no full Copilot) |
| License type | Perpetual (one-time) | Perpetual (one-time) |
| OS support | Windows 10/11 | Windows 10/11 |
Office 2024: What’s New
Office 2024 Professional Plus builds on 2021 with:
- Enhanced Excel functions: Full LET and LAMBDA support, improved dynamic arrays, new text functions (TEXTSPLIT, TEXTBEFORE, TEXTAFTER)
- Improved PowerPoint: Recording improvements, cameo (live camera in slides), enhanced Morph transitions
- Better Outlook: Updated search, improved calendar, enhanced contact management
- Accessibility: Better screen reader support, high contrast improvements across all apps
- Support until 2029: 3 extra years of security updates compared to 2021
Best for: Anyone buying fresh. The longer support window alone justifies the small price difference over 2021.
Office 2021: Still Worth It?
Office 2021 LTSC Professional Plus is a solid choice at a lower price point. It includes all the core apps with XLOOKUP, dynamic arrays, and modern UI improvements.
The catch: Support ends October 2026. After that, no more security patches. The software keeps working, but you’re exposed to unpatched vulnerabilities.
Best for: Budget-conscious buyers who plan to upgrade within 1–2 years, or for offline/isolated machines where security updates are less critical.
Which Edition Do You Need?
| Use case | Recommended edition | Link |
|---|---|---|
| Full suite with Access + Publisher | Professional Plus | 2024 Pro Plus | 2021 Pro Plus |
| Core apps + Outlook (no Access/Publisher) | Home & Business | 2024 H&B |
| Mac user | Home & Business for Mac | 2024 Mac |
| Multiple PCs (2-3) | Pro Plus 3-Device | 2024 3-Device | 2021 3-Device |
For a deeper dive on editions, see our Office 2024 H&B vs Professional comparison.
What About Microsoft 365?
Microsoft 365 is the subscription model ($100+/year). You get the latest features and cloud storage, but you pay every year. For a cost comparison:
- Office 2024 Pro Plus: ~$30–50 one-time → pays for itself vs M365 in under 6 months
- Microsoft 365: ~$100–150/year → $300–450 over 3 years
If you don’t need 1 TB OneDrive cloud storage or always-latest features, a one-time purchase saves significantly. See our full Office 2021 vs 2024 vs 365 comparison.
Common Mistakes
- Buying 2021 to save $5–10 when 2024 gives 3 extra years of support. The price difference is minimal; the support difference is huge.
- Choosing Home & Student when you need Outlook. H&S does NOT include Outlook. Business users need Home & Business or Professional Plus.
- Buying a Windows license instead of Office. “Microsoft” product confusion is the #1 support issue. Office = productivity suite. Windows = operating system. Learn about license types.
- Not checking Mac compatibility. Windows Office licenses don’t work on Mac. Mac users need the Mac-specific version. Read our Mac guide.
Why Buy from OfficeAndWin?
- Genuine Microsoft licenses — Microsoft Partner
- Instant digital delivery — product key in minutes
- 21,000+ verified reviews — 4.71/5 on Judge.me
- Free activation support
Frequently Asked Questions
Can I upgrade from Office 2021 to 2024?
Yes. Uninstall 2021, then install 2024 with your new product key. Your files and settings are preserved.
Will Office 2021 stop working after support ends?
No. It continues working indefinitely. You just won’t receive security updates after October 2026.
Is Office 2024 compatible with Windows 10?
Yes. Office 2024 runs on both Windows 10 and Windows 11.
Which version has better Excel features?
Office 2024. It adds full LET and LAMBDA functions, new text manipulation functions (TEXTSPLIT, TEXTBEFORE), and improved dynamic arrays.
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