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Office 2021 Keys
Office 2021 keys, one-time purchase: Professional Plus for Windows, with Word, Excel, PowerPoint, Outlook, OneNote, Access and Publisher, and Home & Business for Windows or Mac. Each key is delivered instantly by email with activation steps. Want the newest version? See Office 2024.
Office 2021 keys compared
| Product | Apps | Works on | License and activation | Computers |
|---|---|---|---|---|
| Office 2021 Professional Plus | Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher | Windows 10 and 11 | Retail key, activated online with Microsoft. | 1 |
| Office 2021 Professional Plus (Account-Bound) | Same as above | Windows 10 and 11 | Linked to your Microsoft account; can be moved to a new PC | 1 |
| Office 2021 Professional Plus (5 PCs) | Same as above | Windows 10 and 11 | One key for five PCs | 5 |
| Office 2021 Home & Business for Mac | Word, Excel, PowerPoint, Outlook | macOS | Linked to your Microsoft account | 1 |
| Office 2021 Home & Business for Windows | Word, Excel, PowerPoint, Outlook, OneNote | Windows 10 and 11 | Linked to your Microsoft account | 1 |
What changes on 13 October 2026
From that date Microsoft releases no more security updates or bug fixes for Office 2021 (or for Office LTSC 2021). Your apps and documents keep working as before. Businesses that must stay on supported software should move to Office 2024, which is supported until 9 October 2029.
How activation works
Online activation is the standard way: you enter the key in Office or on Microsoft's website, and it activates over the internet. If Office asks you to activate by phone instead, it shows an installation ID that you exchange for a confirmation ID. Our Phone Activation Helper gets the confirmation ID for you, and the phone activation guide shows each screen.
Professional Plus or Home & Business?
Professional Plus adds Access and Publisher and runs on Windows only. Home & Business has Word, Excel, PowerPoint and Outlook, is linked to your Microsoft account, and is the edition to choose on a Mac.
Office 2021 FAQ
Will Office 2021 stop working after 13 October 2026?
No. It keeps working, but it gets no more security updates.
Should I buy Office 2021 or Office 2024?
Office 2024 is supported until 9 October 2029, three years longer. Choose Office 2021 only if the lower price or a compatibility requirement matters more to you.
Does Office 2021 work on Windows 11?
Yes, on Windows 10 and Windows 11.
Can I move Office 2021 to a new computer?
Account-bound and Home & Business keys are linked to your Microsoft account, so you can reinstall them on a new computer from there.
What is an account-bound (BIND) key?
A key that links Office to your Microsoft account the first time you activate it, so you can reinstall it from your account later.
What if my key doesn't activate?
Contact us within 15 days of your order, on live chat or at support@cheapkeys.io. We'll help you activate it or replace the key, and if no working solution is possible, you get a refund.
Related: Office 2021 activation guide · Office 2019 vs 2021 compared · Office 2024 keys · All Microsoft Office keys