Get Microsoft Office 2021 Professional Plus with a single one-time payment – no subscription, no recurring fees, no expiry. This is the standalone version of Microsoft Office designed for professionals and businesses who want the complete Office suite permanently installed on their PC without ongoing costs. Your activation key is delivered by email, typically on the same day as your order.

What’s included in your MS Office 2021 Pro Plus license

Your purchase includes one Microsoft Office 2021 Pro Plus activation key for one Windows PC. The key is unused, activates through Microsoft’s official servers, and covers a one-time installation with no subscription required. All desktop applications are installed locally – no internet connection needed to use them after activation.

Key facts

• Product: Microsoft Office 2021 Professional Plus
• License: One-time purchase, no subscription
• Devices: 1 PC
• Compatible OS: Windows 10, Windows 11
• Architecture: 64-bit
• Activation: Online via Microsoft activation servers
• Delivery: By email, typically same day
• Language: Multiple versions supported
• Updates: Security and quality updates included
• Not compatible with: macOS, Android, Chromebook
• Previously activated: No – unused key

Applications included in Office 2021 Pro Plus

Microsoft Office 2021 Professional Plus includes the full suite of desktop productivity applications:

• Word 2021 – document creation, editing and advanced formatting
• Excel 2021 – spreadsheets, data analysis, formulas and charts
• PowerPoint 2021 – presentations, design tools and slide management
• Outlook 2021 – email, calendar and contact management
• Access 2021 – database creation and management (Windows only)
• Publisher 2021 – layouts, brochures and marketing materials
• OneNote 2021 – notes, organization and collaboration

All applications are full desktop versions – not web apps. They work fully offline once installed and activated.

Office 2021 Pro Plus vs other editions

MS Office 2021 comes in several editions. Professional Plus is the most complete standalone version available:

If you need Access for database work or Publisher for design and marketing materials, Professional Plus is the only edition that includes both.

Office 2021 vs Microsoft 365

If you do not need cloud storage or continuous feature updates, Office 2021 Pro Plus is the more cost-effective choice.

What is new in Office 2021 compared to Office 2019

Office 2021 brings meaningful improvements across the suite compared to Office 2019:

• Excel gains new functions including XLOOKUP, dynamic arrays, and improved data analysis tools
• PowerPoint adds improved presentation recording, ink features, and transition effects
• Word improves co-authoring capabilities and document recovery
• Outlook introduces improved search and a more focused inbox experience
• Teams integration is built in across the suite
• Accessibility improvements across all applications
• Dark mode support improved across Word, Excel and PowerPoint

Who is MS Office 2021 Pro Plus for

Office 2021 Professional Plus is the right choice if you:

• Want the complete Office suite with a one-time affordable payment and no subscription
• Need Access for database management or Publisher for design work – not available in lower editions
• Work in a professional or business environment requiring the full suite
• Prefer software installed locally rather than cloud-dependent tools
• Are running Windows 10 or Windows 11 on a single PC
• Want security and quality updates without paying for a subscription

If you use macOS, this product is not compatible – see our Office for Mac options instead.

System requirements

Before purchasing, confirm your PC meets Microsoft’s minimum requirements for Office 2021:

• Processor: 1.6 GHz or faster, 2-core minimum
• RAM: 4 GB minimum
• Storage: 4 GB available disk space
• Operating system: Windows 10 or Windows 11
• Display: 1280 x 768 resolution minimum
• Graphics: DirectX 9 compatible or later
• Internet: Required for installation and activation only – not required for daily use

Before you buy

• Confirm your PC runs Windows 10 or Windows 11 – Office 2021 does not support macOS, Android or Chromebook
• Check you have at least 4 GB of free disk space before installing
• Ensure you have an internet connection available for the initial activation
• Consider whether you need Access or Publisher – if not, a lower edition may be sufficient
• Back up important files before installing or upgrading from an older Office version

How to activate Microsoft Office 2021 Professional Plus

Step 1 – Redeem your product key: Go to office.com/setup, sign in with your Microsoft account or create one if you do not have one. Enter your 25-character product key without hyphens and follow the on-screen prompts. This links the license to your Microsoft account.

Step 2 – Download and install Office: After redeeming your key, download the Office installer from your Microsoft account and run it. Follow the on-screen installation steps.

Step 3 – Activate: Once installed, open any Office application. Go to File → Account → Activate Product and sign in with the Microsoft account you used to redeem the key. Office will activate automatically.

If you experience any issues during activation, contact our support team by email. We respond on the same day and will assist until your software is fully activated.

Frequently asked questions

Is this the same Office 2021 sold by Microsoft?
Yes. The software is identical – same applications, same features, same updates. Your key activates through Microsoft’s official servers.

Does this require an internet connection to use?
An internet connection is required during installation and activation only. Once activated, all Office applications work fully offline.

Can I install this on more than one PC?
This key covers activation on one PC.

Is this compatible with macOS?
No. Office 2021 Professional Plus is for Windows only. It is not compatible with macOS, Android or Chromebook. For Mac users we offer Office 2021 Home and Business for Mac.

What if my key does not activate?
Contact our support team by email and we will resolve the issue on the same day.