Office 2021
Buy a genuine Microsoft Office 2021 Professional Plus key for 1 or 5 PCs, Office 2021 Home and Business for Mac, or a bundle with Windows 11 Pro or Visio and Project. Every license is a perpetual, one-time purchase with the license type stated on the product page, and the key arrives by email within minutes with the official Microsoft download link.
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Showing all 5 results
Microsoft Office 2021 Professional Plus and the Office 2021 family
Office 2021 is the perpetual Office release that sits between Office 2019 and the current Office 2024, and it is still the most widely installed one-time purchase suite on Windows desktops. This category holds every Office 2021 license we sell: Microsoft Office 2021 Professional Plus for 1 PC or 5 PCs, Office 2021 Home and Business for Mac, and two bundles that combine Office 2021 Pro Plus with Windows 11 Pro or with Visio 2021 and Project 2021. Each is a genuine perpetual license that you buy once and keep, with no subscription attached.
Two facts shape the decision to buy Office 2021 in 2026. First, Office LTSC 2021 remains under Microsoft mainstream support until October 13, 2026, so it continues to receive security updates for now. Second, Office 2021 Professional Plus is the newest perpetual suite that still includes Publisher, which Microsoft discontinued in the 2024 release. If Publisher is part of your daily work, ms office 2021 professional plus is the version to buy, and for everyone else it remains a capable, familiar suite at a lower entry point than Office 2024.
What is included in Office 2021 Professional Plus
Office 2021 Pro Plus is the complete Windows suite. Compared with Office 2019 it added features such as XLOOKUP and dynamic arrays in Excel, co-authoring improvements, a refreshed visual style that matches Windows 11, and dark mode across the apps. The table compares the editions in this category.
| Edition | Apps included | Runs on | Installs per key |
|---|---|---|---|
| Office 2021 Professional Plus (1 PC) | Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher | Windows 10 or Windows 11 | 1 PC |
| Office 2021 Professional Plus (5 PCs) | Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher | Windows 10 or Windows 11 | 5 PCs |
| Office 2021 Home and Business for Mac | Word, Excel, PowerPoint, Outlook, OneNote | Supported macOS versions | 1 Mac |
| Office 2021 Pro Plus + Windows 11 Pro bundle | Pro Plus apps plus a Windows 11 Pro key | New or rebuilt Windows PC | 1 PC |
| Office 2021 Pro Plus + Visio 2021 + Project 2021 | Pro Plus apps plus Visio Professional and Project Professional | Windows 10 or Windows 11 | 1 PC |
Publisher and Access: why Office 2021 Pro Plus still matters
Publisher handles page layout for newsletters, brochures and print jobs, and Access is the desktop database behind countless small business inventory, invoicing and membership systems. Office 2021 Professional Plus includes both. Office 2024 Professional Plus keeps Access but drops Publisher, and Home and Business editions never had either. That makes microsoft office professional plus 2021 the practical ceiling for anyone whose workflow depends on Publisher files, at least until those files are migrated to another tool.
Which Office 2021 edition should I choose?
Here is how we would match the products in this category to common situations.
- Microsoft Office 2021 Professional Plus for 1 PC: the standard choice for a single Windows computer. Full suite, including Publisher and Access, and the version most people mean when they search for office 2021 pro plus.
- Microsoft Office 2021 Professional Plus for 5 PCs: one key for a small office or a household with several Windows machines. Same apps, five installs, one order.
- Microsoft Office 2021 Home & Business for Mac: Word, Excel, PowerPoint, Outlook and OneNote on macOS. This is the Office 2021 edition to buy for a Mac, since Professional Plus is Windows only.
- Office 2021 Pro Plus + Windows 11 Pro bundle: a single order when you are building or reinstalling a PC and need both the operating system and the suite.
- Office 2021 Pro Plus + Visio 2021 + Project 2021 bundle: the full professional toolkit for diagramming and project scheduling alongside the core apps.
System requirements for Office 2021
Office 2021 for Windows requires Windows 10 or Windows 11 with a 1.6 GHz dual-core processor, 4 GB of RAM, 4 GB of free disk space and a 1280 by 768 display. It does not install on Windows 7 or Windows 8.1; for those systems, Office 2016 is the newest option. Because Windows 10 support ended on October 14, 2025, we suggest running Office 2021 on Windows 11 where the hardware allows it. Office 2021 Home and Business for Mac requires a macOS version Microsoft currently supports, and the product page lists the current requirement. Installation and activation need an internet connection.
How activation and delivery work
Ordering a Microsoft Office 2021 product key from us is entirely digital.
- Choose your edition and pay by card, Apple Pay or Google Pay through our encrypted, PCI-compliant checkout.
- Within minutes of payment, 7 days a week, an email arrives with the 25-character key, the official Microsoft download link for Office 2021 and a short installation guide. The key is also saved under My Account.
- Download the installer from Microsoft, run it and enter the key when prompted. The Mac edition asks you to sign in with a Microsoft account to link the license; Pro Plus for Windows activates directly with the key.
- Confirm activation under File, then Account, in any Office app. It should read Product Activated with the edition name.
- If Microsoft requests phone activation, send us the Installation ID and our team replies with the Confirmation ID. If a key cannot be activated and support cannot fix it, you receive a replacement or a full refund under our 30-day money-back guarantee.
Retail, OEM or volume: check the license type
The license type is stated on each Office 2021 product page. A retail key can be uninstalled from one PC and activated on another, so it follows you to a new computer. An OEM key stays on the first PC it activates on. A volume key, also called a MAK key, carries a fixed number of activations and is designed for organizations rolling out the same suite across several machines, which is how the 5 PC product works. All three types are perpetual licenses to genuine software downloaded from Microsoft, so the choice comes down to whether you expect to move the license later.
Office 2021 or Office 2024?
Both are perpetual, both look nearly identical, and both run on Windows 10 and 11. Office 2024 is supported until October 9, 2029, about three years longer than Office 2021, and adds newer Excel functions and the updated Outlook. Office 2021 keeps Publisher and typically costs less. If you need Publisher or are equipping a computer with a short remaining life, buy Office 2021. If you want the longest security update window, choose Office 2024. Either way the license is a one-time purchase that never renews.
Frequently asked questions about Office 2021
Is Office 2021 still supported by Microsoft?
Yes, for now. Office LTSC 2021, which includes Office 2021 Professional Plus, is in Microsoft mainstream support until October 13, 2026, and receives monthly security updates until that date. After that the software keeps working exactly as before, but Microsoft stops issuing patches for it. If you want updates to continue for years rather than months, Office 2024 is supported until October 9, 2029. If Publisher or a lower entry cost matters more than the update window, Office 2021 remains a sound purchase.
Does Office 2021 Professional Plus include Publisher and Access?
Yes. Office 2021 Professional Plus ships with Word, Excel, PowerPoint, Outlook, OneNote, Access and Publisher. It is the newest perpetual Office suite that still includes Publisher, since Microsoft dropped the application from Office 2024. Access is present in both 2021 and 2024 Pro Plus. Home and Business editions, including the Mac version in this category, do not include Access or Publisher. If you rely on either application, Pro Plus is the edition to buy.
Is the 5 PC Office 2021 key really one key for five computers?
Yes. The 5 PC product is a single 25-character key that activates Office 2021 Professional Plus on up to five Windows computers. It suits a small office, a family with several PCs or anyone managing a handful of workstations who wants one order and one record to keep. Each install downloads from the same official Microsoft link. The product page states the license type, and the activation count is fixed, so once five installs have used the key it cannot be activated on a sixth machine.
Can I install Office 2021 Professional Plus on a Mac?
No. Professional Plus is a Windows-only edition. For macOS, choose Office 2021 Home and Business for Mac, which includes Word, Excel, PowerPoint, Outlook and OneNote and activates by signing in with a Microsoft account. It does not include Access or Publisher, neither of which has ever been available on Mac. If you need to run Access on a Mac, the usual route is a Windows virtual machine with a Windows license and Office 2021 Professional Plus installed inside it.
Is Office 2021 a one-time purchase that never expires?
Yes. Every Office 2021 product here is a perpetual license. You pay one time and the software keeps running on the activated computer with no renewal, no expiry date and no subscription, which is what most buyers mean when they search for a permanent Office license. Microsoft security updates continue until October 13, 2026, and after that the apps still work normally. Some product names on our site include the word lifetime for this reason. It refers to the license never expiring, not to Microsoft supporting the software forever.
Every Office 2021 key ships by email within minutes and is backed by our 30-day money-back guarantee. Read why customers trust us for how we operate, or compare with Office 2019 if you are supporting an older Windows 10 machine on a tight budget.