Office 2021 vs Microsoft 365 in 2025: Which Should You Buy?
One of the most common questions when buying a PC or laptop is: should I buy Office 2021 outright or subscribe to Microsoft 365? Both options have their advantages — here's how to decide.
What Is Office 2021?
Office 2021 is a one-time purchase that includes Word, Excel, PowerPoint, and OneNote. Once you buy it, it's yours forever with no recurring payments. It doesn't include extra OneDrive storage or new feature updates.
What Is Microsoft 365?
Microsoft 365 (formerly Office 365) is a monthly or annual subscription that includes the same Office apps plus additional benefits:
- Always up to date with the latest features
- 1 TB of OneDrive cloud storage
- Installable on up to 5 devices
- Mobile and web access
- Microsoft Teams included
Price Comparison (2025 Reference)
| Product | Price | Devices | Updates | OneDrive |
|---|---|---|---|---|
| Office Home & Student 2021 | ~$150 one-time | 1 PC/Mac | ❌ Security only | 5 GB |
| Microsoft 365 Personal | ~$70/year | 1 user, 5 devices | ✅ Continuous | 1 TB |
| Microsoft 365 Family | ~$100/year | 6 users, 5 each | ✅ Continuous | 1 TB each |
Microsoft 365 Exclusive Features
- Copilot AI: AI assistant integrated into Word, Excel, and PowerPoint
- Real-time collaboration on shared documents
- Full mobile apps (no editing limitations)
- Publisher and Access (PC-only plans)
When to Choose Office 2021
- You use only one device and don't need cloud services
- You prefer no recurring payments
- Your needs are basic: documents, spreadsheets, presentations
- You have limited or no internet connection
When to Choose Microsoft 365
- You work across multiple devices (PC, laptop, mobile)
- You need cloud storage (OneDrive)
- You collaborate with others on documents
- You want the latest features always
- You have a family and want to share the license
Conclusion
If you use a single device for basic tasks, Office 2021 can be more economical long-term. If you need mobility, collaboration, and constant updates, Microsoft 365 is worth every dollar. At Sistemas RJD, we sell genuine licenses for both versions.