Office 2021 Professional Plus Key
- Office 2021 Professional Plus for one Windows 10 or 11 PC. One-time purchase.
- Retail key, activated online with Microsoft
- Download and activate from Microsoft directly
- Instant delivery to your email
- Email & live chat support 24/7. Key won’t activate? Tell us within 15 days of your order and we fix it, replace it or refund you.
 Brand | Microsoft |
|---|---|
 License Type | Retail |
 Delivery | Instant Delivery |
25.99 €
Description
What you get
After payment you receive your 25-character Office 2021 Professional Plus 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 step-by-step activation guide, and the key is also saved under My Account → Keys in case the email lands in your spam folder.
Office 2021 support ends on 13 October 2026: what that means
Microsoft’s support end date for Office 2021 is 13 October 2026. After that date Office 2021 keeps working exactly as before, but Microsoft no longer releases security updates or bug fixes for it. If you want updates until 9 October 2029, choose Office 2024 Professional Plus. Office 2021 still makes sense if you use Publisher, which isn’t part of Office 2024, or if your company or school needs the 2021 version.
What’s included
- Word, Excel, PowerPoint, Outlook, OneNote, Access and Publisher 2021
- For one Windows 10 or Windows 11 PC, 32-bit or 64-bit
- Not for Mac: for a Mac, see Office 2021 Home & Business for Mac
License and activation
This is a retail Office 2021 Professional Plus key for one PC. You redeem it on Microsoft’s official website, setup.office.com, with your Microsoft account, then download Office from Microsoft and activate it online. Because the key is redeemed to your Microsoft account, the download stays available in your account.
Is it genuine? Why is it cheaper than Microsoft’s price?
Yes. It’s a genuine Microsoft key that you redeem and activate on Microsoft’s own website. We buy unused keys from companies that purchase Microsoft licenses in large batches and have more than they need. We get that surplus for a fraction of the retail price and pass the saving on to you.
We state the license type, activation method and device limit before you buy, and the key you receive is exactly the one described: a retail Office 2021 Professional Plus key for one PC, activated online.
How to install and activate Office 2021
- Uninstall any other version of Office first, including a preinstalled Microsoft 365 trial (Settings > Apps).
- Go to setup.office.com, sign in with your Microsoft account (or create one) and enter your product key.
- Choose your language and click Redeem. The download starts from Microsoft.
- Run the setup file and wait until Office is installed.
- Open Word. If the activation wizard appears, choose “I want to activate the software over the Internet” and click Next.
Screenshots of every step are in our guide: How to activate Office 2021.
If activation fails
- “This product key can’t be used”: check that you typed the key exactly as in the email, and that no other version of Office is installed.
- Anything else: 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.
Office 2021 or Office 2024?
| Office 2021 Professional Plus | Office 2024 Professional Plus (LTSC) | |
|---|---|---|
| Apps | Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher | Word, Excel, PowerPoint, Outlook, OneNote, Access |
| License | Retail key, redeemed to your Microsoft account | LTSC key, activated once on one PC |
| How you install it | From setup.office.com | With Microsoft’s Office Deployment Tool |
| Microsoft support until | 13 October 2026 | 9 October 2029 |
| Payment | One-time | One-time |
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
| Product | Microsoft Office 2021 Professional Plus |
|---|---|
| Apps | Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher |
| License type | Retail, one PC |
| Activation | Online, through Microsoft’s website |
| Platform | Windows 10 and 11, 32-bit or 64-bit |
| Languages | All languages Microsoft offers for Office 2021 (you choose when you redeem) |
| Delivery | Instant, by email and under My Account → Keys |
| Microsoft support until | 13 October 2026 |
Office 2021 compared with Office 2019
The chart shows which apps each Office 2021 and Office 2019 package includes.
Frequently asked questions
Will Office 2021 stop working after 13 October 2026?
No. It keeps working; only Microsoft’s security updates stop.
Is this a subscription?
No. You pay once and keep using it.
How many PCs can I install it on?
One PC per key. For five PCs, see Office 2021 Professional Plus (5 PCs).
Can I install it on a Mac?
No, Professional Plus is Windows only. For a Mac, choose Office 2021 Home & Business for Mac.
Can I download it again later?
Yes. The key is redeemed to your Microsoft account, so the download stays available there.
Can I use it for business?
Yes. Professional Plus is the business edition of Office 2021.
How fast is delivery?
Instant in most cases, by email and under My Account → Keys. A system delay can occasionally add 5–10 minutes.
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.
Specification
Overview
| Brand | Microsoft |
|---|---|
| License Type | Retail |
| Delivery | Instant Delivery |
Related Products
WITCH ON THE HOLY NIGHT CD Key
48.49 €
![Buy RDS CALs for Windows Server 2016 [50 Users]](https://cheapkeys.io/wp-content/uploads/2023/10/Server-2016-User-CAL-70x90.png "Server 2016 User CAL - Cheap Keys")
Customer Reviews
13 reviews for Office 2021 Professional Plus Key
Clear filtersOnly logged in customers who have purchased this product may leave a review.
More Like This
Max Dawson (verified owner) –
Microsoft Office 2021 license cost at cheapkeys.io is super affordable, and I am 100% satisfied with the price. The key is 100% genuine. I received the Office 2021 key after 2 minutes, and everything went smoothly with the installation and activation. Overall, I am very satisfied and will buy again when I need more tools. Thank you cheap keys team.
Alberto Castiglione (verified owner) –
bought office 2021 key and had some issues during the installation, but the support team help me immediately on live chat, everything was fine with the key it was error on my computer and support help me solve it very easy. 5 stars review for this team that provides old school support and help to their customers. will buy again when from you for sure the deals here are amazing for original keys
Tage Lundström (verified owner) –
Highly recommended, I buy office 2021 pro key and received immediately, great offer for office 2021 will recommend to my colleagues too.
Jag kommer att rekommendera denna webbplats till mina kollegor, köpte office 2021 pro key och fick omedelbart, tack så mycket, det bästa erbjudandet för office 2021 originalnyckel som finns på internet.
Stojan Ivanović (verified owner) –
Question – Can i use tis license to activate office if i reinstall or change my pc?
Bought today, amazing deal for office 2021 professional plus key, installed and activated easy, it’s original key for sure, everything went perfectly.
All the best, Stojan
Store manager Manager –
This license is valid for only one device. If you need a license that will be linked to your account, allowing you to switch devices, you can purchase the BIND License for Office from here: https://cheapkeys.io/product/buy-office-2021-professional-plus-bind-key/
For more information, click on the chat icon, and our team will help you choose the version that best fits your needs.
Lucas Beauchesne (verified owner) –
Bonne affaire pour Office 2021 professionnel plus licence pour un appareil, très satisfait de la façon dont tout s’est passé, le téléchargement et l’activation se font via le canal officiel de Microsoft, merci.
Verified owner slawa011 (verified owner) –
Hi, I bought the activation key today and activated it.
Everything is working as expected so far. Happy with the service.
Vic
Verified owner DuÅ¡an Dunjić (verified owner) –
great !
Verified owner vuksic.gartner (verified owner) –
Hi, I bought the activation key today and activated it.
Everything is working as expected so far. Happy with the service.
Verified owner Deividas J (verified owner) –
Perfect site!
Verified owner Rinaldo Lanicca (verified owner) –
Hallo
ich habe das Programm gekauft und installiert, bin sehr zufrieden damit es läuft alles in Ordnung..
Bei einem anderen Programm (Project2021) hatte ich einen selbstgemachten Fehler und der Service hat mir sofort und unkompliziert geholfen.
Ich kann CheapKeys nur weiterempfehlen!