Microsoft Office 2021 Professional Plus Key

Buy a Microsoft Office 2021 Professional Plus Key for one Windows PC and receive the activation key by email. Office LTSC Professional Plus 2021 is a fixed desktop productivity suite for buyers who want Word, Excel, PowerPoint, Outlook, Access, Publisher, and other included applications without a recurring Microsoft 365 subscription.

Office 2021 remains useful for a compatible Windows computer that needs established Office applications at a lower price than the 2024 release. However, Microsoft’s support for Office LTSC 2021 is scheduled to end in October 2026, so buyers planning long-term use should compare it with Office 2024 before ordering.

Included Office 2021 applications

• Microsoft Word: Documents, letters, reports, forms, and professional writing.
• Microsoft Excel: Spreadsheets, calculations, charts, tables, and data analysis.
• Microsoft PowerPoint: Presentations for work, education, training, or personal projects.
• Microsoft Outlook: Email, calendars, contacts, and task management.
• Microsoft Access: Desktop database creation and management on Windows.
• Microsoft Publisher: Desktop-publishing layouts for brochures, flyers, labels, and similar material.
• Microsoft OneNote: Digital notebooks for notes, research, and planning.

Why choose Office 2021 Professional Plus?

Office 2021 can be a practical choice when you need a familiar, locally installed suite for one Windows PC and do not need Microsoft 365 cloud services or the newest Office 2024 features. It is also relevant when a workplace, template, macro, add-in, or documented process is already standardized on the 2021 release.

Choose Office 2024 instead if you want the newer fixed release and a longer remaining support period. Choose Microsoft 365 if you need continuous feature updates, subscription services, cloud storage, or licensed use across multiple devices. See our one-time Office vs Microsoft 365 comparison.

Compatibility and installation

This Professional Plus edition is intended for a compatible Windows PC. Access and Publisher are Windows-only applications. Microsoft provides both 32-bit and 64-bit Office LTSC 2021 versions, although 64-bit is generally recommended when application and add-in compatibility allows it.

Office installations using different versions, architectures, or licensing channels can conflict. Remove incompatible Office products before installation if prompted. The key must match the installed edition.

How to activate Office 2021

1. Remove any Office installation that conflicts with Office 2021 Professional Plus.
2. Download the appropriate Office installation files through Microsoft’s official method.
3. Install the required 32-bit or 64-bit edition.
4. Open Word, Excel, or another included application.
5. Enter the delivered key when the activation screen requests it.

No physical media is shipped. The product key arrives digitally, while installation files should be obtained from Microsoft.

Frequently asked questions

Is Office 2021 a subscription?

No. This is a fixed Office release with a one-time purchase model. It is not Microsoft 365 and does not include recurring subscription services.

Does it include Publisher and Access?

Microsoft lists both Publisher and Access in Office LTSC Professional Plus 2021 for Windows. They are not available on macOS.

Will Office 2021 continue working after support ends?

The installed applications do not automatically stop when support ends, but Microsoft will no longer provide normal security updates or technical support for that release. Using unsupported productivity software can create security and compatibility risks.

Can I upgrade to Office 2024 for free?

No. A fixed Office 2021 license does not automatically include Office 2024 or future major versions.

Can I install it on multiple computers?

This listing covers one compatible Windows PC. Purchase a separate eligible license for each additional device.

Office 2021 offers a lower-cost fixed suite, but its remaining support period is shorter than Office 2024. Consider the intended lifetime of the computer before choosing between them.