Office 2021 Professional Plus - Digital Key
Office 2021 Professional Plus: perpetual license, one-time purchase. Modern Excel (XLOOKUP, dynamic arrays), dark mode, supported until October 2026.
Specifications
- Version:
- 2021
- Edition:
- Professional Plus
- License Type:
- Perpetual
Choose your delivery format
Identical content
All formats include the same authentic Microsoft activation key. Only the delivery method differs.
Member of the Microsoft AI Cloud Partner Program
£22.99
-23%£29.99
Secure payment available with card or PayPal.
- ✓Delivery by email in a few minutes by email
- ✓Authentic Microsoft license
- ✓24/7 support - generally answered within an hour
Choose your delivery format
Identical content
All formats include the same authentic Microsoft activation key. Only the delivery method differs.
Member of the Microsoft AI Cloud Partner Program
£22.99
-23%£29.99
Secure payment available with card or PayPal.
- ✓Delivery by email in a few minutes by email
- ✓Authentic Microsoft license
- ✓24/7 support - generally answered within an hour
Office 2021 Professional Plus: the modern perpetual license
Office 2021 Professional Plus is a perpetual license: you buy it once and use it indefinitely on your PC, with no subscription or monthly payment. It is the version that modernises the Office suite while staying a one-time purchase, ideal if you want recent applications without going through Microsoft 365.
In practice, you receive your product key by email, download Office, install it and activate the license online within minutes. Once activated, Office 2021 works offline. The suite does not include Copilot or the continuous generative AI of Microsoft 365, which stay tied to the subscription.
What Office 2021 adds over Office 2019
This is where the real difference lies. Office 2021 adds modern functions missing from Office 2019, especially useful in Excel:
- XLOOKUP: the next-generation lookup, simpler and more powerful than VLOOKUP.
- Dynamic arrays: a single formula returns a range of results, with the FILTER, SORT, UNIQUE, SEQUENCE and SORTBY functions.
- LET function and XMATCH: more readable formulas and finer lookups.
- Full dark mode across all apps, including the editing canvas.
- Improved co-authoring, redesigned ribbon and better performance (memory, multitasking).
On support, Office 2021 is covered until October 2026, whereas Office 2019 reached end of support in October 2025. If you were hesitating between the two, 2021 is the natural step up from 2019.
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One-time purchase, no subscription
Unlike Microsoft 365, billed monthly or yearly, Office 2021 Professional Plus is paid once. No automatic renewal, no price increase, no recurring fees. You keep your applications on your computer for as long as you like, and you get security updates while the version is supported.
Applications included
The Professional Plus edition gives access to the full suite, in its 2021 versions:
- Word: word processing and professional documents.
- Excel: spreadsheets with XLOOKUP, dynamic arrays and data analysis.
- PowerPoint: presentations and slideshows.
- Outlook: email, calendar and contacts.
- Plus Access, Publisher and OneNote on Windows PC.
Delivery and activation
With your order, you receive a valid Retail license, your product key by email with instant delivery, and an invoice in your name. Activation is done online, and you have a 30-day money-back guarantee. The license is valid for 1 Windows PC.
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How activation works
- Buy your license and receive the key by email.
- Download Office and install the suite on your PC.
- Open an application (Word or Excel) and choose product key activation.
- Enter your 25-character key: activation happens online in a few seconds.
- Check under File then Account that the product is activated.
Which Office version should you choose?
Office 2021 is the sweet spot: modern applications and support until 2026, as a one-time purchase. If you want the most recent version and the longest support (until 2029), see Office 2024 Professional Plus. If your budget is very tight and you accept a version whose support has already ended, look at Office 2019 Professional Plus. For a full comparison of the three versions, see the Office 2019 vs 2021 vs 2024 guide.
Microsoft Authenticity Guarantee
- Official Microsoft activation keys - Authenticity guaranteed
- Perpetual license - No subscription, single payment
- Activation on 1 PC - Reusable after reinstallation
- Free technical support in French - Email assistance
- 30-day money-back guarantee
What You Receive
Official Microsoft activation key
Activation key verified on Microsoft servers before shipping.
Immediate access in your customer area
Find your license instantly after payment validation.
Invoice available
Download your PDF invoice from your account.
24/7 support - generally answered within an hour
Our team assists you with installation and activation.
Compatibility & Requirements
System Requirements
- ✓Windows 10 or Windows 11
- ✓Processor 1 GHz or faster
- ✓RAM: 2 GB minimum
- ✓Disk space: 4 GB available
Usage Conditions
- •License valid for 1 PC only
- •Internet connection required for activation
- •Offline use possible after activation
- •Reinstallation possible on the same PC
Activation in 5 Steps
Simple and fast, follow our step-by-step guide
Order your license
Select your delivery format and complete your purchase securely.
Access your customer area
Log in to your AllKeyMasters account to retrieve your activation key.
Download Office
Download Office directly from the official Microsoft website.
Install the software
Launch the installation of Office 2021 Professional Plus - Digital Key on your computer.
Activate with your key
Enter the provided activation key. Your license is activated for life!
Frequently Asked Questions
Is Office 2021 a perpetual license?
What is the difference between Office 2021 and Office 2019?
What is the difference between Office 2021 and Office 2024?
Does Office 2021 include Copilot or AI?
Is it compatible with Windows 11 and Windows 10?
How does activation work?
On how many PCs can I install it?
Will I get an invoice?
Need help? Contact our free technical support at support@allkeymasters.com
Customer Reviews
Clear email, key worked fine.
Published on June 2026
Simple et efficace, rien à redire.
Published on June 2026
Petit souci au début, mais le support a réglé ça.
Published on June 2026