Office 2021 Home & Business Key (Windows)

What you get

After payment you receive your Office Home & Business 2021 product key by email, instantly in most cases (a system delay can occasionally add 5–10 minutes). The email includes the download link and our activation guide, and the key is also saved under My Account → Keys.

Office 2021 support ends on 13 October 2026

Microsoft’s support end date for Office 2021 is 13 October 2026. After that date Office keeps working, but Microsoft no longer releases security updates or bug fixes for it. If you want updates until 2029, see our Office 2024 keys.

What’s included

• Word, Excel, PowerPoint, Outlook and OneNote 2021
• For one Windows 10 or Windows 11 PC, licensed for home and business use
• Not for Mac: for a Mac, see Office 2021 Home & Business for Mac

License and activation

You redeem the key on Microsoft’s official website, setup.office.com, with your Microsoft account. Office is then linked to that account: you install it from your account and can reinstall it or move it to a new PC from there.

How to install Office Home & Business 2021

1. Uninstall any other version of Office first, including a preinstalled Microsoft 365 trial (Settings > Apps).
2. Go to setup.office.com, sign in with your Microsoft account (or create one) and enter your product key.
3. Choose your language and click Redeem.
4. Download Office from your Microsoft account and run the installer.
5. Open Word and sign in with the same Microsoft account. Office activates automatically.

Screenshots of every step: How to activate Office 2021.

If activation fails

Check that you typed the key exactly as in the email and that no other version of Office is installed. If it still doesn’t work, contact us within 15 days of your order, on live chat or at support@cheapkeys.io. We’ll fix it or replace the key, and if no working solution is possible, you get a refund under our refund policy.

Home & Business or Professional Plus?

Home & Business has Word, Excel, PowerPoint, Outlook and OneNote, and it’s linked to your Microsoft account. Office 2021 Professional Plus adds Access and Publisher.

System requirements

• Operating system: Windows 10 or Windows 11
• Processor: 1.1 GHz or faster, 2 cores
• Memory: 4 GB RAM (2 GB for 32-bit)
• Disk space: 4 GB available
• Display: 1280 × 768 resolution
• An internet connection to download and activate

Specifications

Frequently asked questions

Is it a subscription?

No. You pay once and keep using it.

Can I use it for my business?

Yes. Home & Business is licensed for business use.

Can I move it to a new PC?

Yes. It’s linked to your Microsoft account, so you can install it on your new PC from there.

Will it stop working after 13 October 2026?

No. It keeps working; only Microsoft’s security updates stop.

What if my key doesn’t work?

Contact us within 15 days of your order. We fix it or replace the key, or refund you if no working solution is possible.