Microsoft Office Professional Plus 2021 – Genuine Lifetime Licence Key (Windows, Last Version with Publisher)

This Office 2021 lifetime licence is a one-time purchase of Microsoft Office Professional 2021 (Professional Plus) for Windows: Word, Excel, PowerPoint, Outlook, OneNote, Access and Publisher on 1, 3 or 5 PCs from $29.99, with no subscription, and the last Office version that includes Publisher. Your genuine key and download link arrive by email in about 60 seconds, covered by our 30-day refund promise if the key is unused or will not activate.

Support position, stated plainly: Microsoft's support for Office 2021 ended on 13 October 2026. The apps keep working and the licence never expires, but Microsoft no longer issues security updates, bug fixes or technical support for any Office 2021 edition. Our Office 2021 end of life guide explains what changed. If you do not need Publisher, Office Professional Plus 2024 costs the same $29.99 and is supported until 9 October 2029.

Office 2021 lifetime licence: key facts

Office Professional Plus 2021 vs Professional Plus 2024

Weighing all three options? See Office 2021 vs 2024 vs Microsoft 365. If Publisher at the lowest price is the only requirement, Office Professional Plus 2019 is $24.99 (also out of support).

How installation and activation work

1. Pay, and the email arrives with your key and the download link.
2. Uninstall any older Office or Microsoft 365 first (Settings > Apps), then restart.
3. Run the installer. It is Microsoft's Office Deployment Tool with a configuration for Professional Plus 2021, and it downloads Office from Microsoft's servers.
4. Open Word, go to File > Account > Activate Product, and enter the key. If online activation is blocked, phone activation takes about five minutes.

Screenshots, seven-language downloads and SHA-256 checksums: Office 2021 Professional Plus installation guide.

What kind of key is this?

A genuine Microsoft volume-licence (MAK) key for Office LTSC Professional Plus 2021, activated directly by Microsoft with no Microsoft account sign-in. It covers the number of PCs you bought (1, 3 or 5). Keep the order email: support can re-send the installer link if you reinstall on the same PC.

System requirements

Windows 11 or Windows 10, 64-bit; 1.6 GHz dual-core processor or faster; 4 GB RAM; 4 GB free disk space; 1280 × 768 display; internet connection for download and activation only. Not for Mac, Android or Chromebook. Note that Windows 10 itself stopped receiving security updates on 14 October 2025.

Frequently asked questions

Is Office Professional Plus 2021 a lifetime licence?

Yes. Pay once and the licence never expires; there is no renewal. Microsoft's support ended on 13 October 2026, so the apps no longer receive security updates, but they keep working and activating.

Is this Microsoft Office 2021 key genuine?

Yes. Every key activates directly with Microsoft. Nerdused is the brand of Transfleet Trading Limited, a UK company and a member of the Microsoft Partner Program (Partner ID 6467441). If a key does not activate, we replace it or refund you in full within 30 days.

Does Office 2021 include Publisher and Access?

Yes, both. It is the last perpetual Office with Publisher; Office 2024 has Access only in Professional Plus and no Publisher at all.

Is it still worth buying Office 2021 after end of support?

Only if you need Publisher or must match existing Office 2021 installs. For any other new install, Office Professional Plus 2024 is the same price with security updates until 2029.

Does it work on a Mac?

No. Professional Plus is Windows only. Our Office for Mac collection lists what we stock for macOS.

Can I install Office 2021 alongside Office 2024 or Microsoft 365?

No. Microsoft does not support two Office versions with the same apps on one PC, so remove the other Office first (Step 2 above). Your documents are not affected.