Microsoft Office 2021 Home & Business For Windows

Genuine Microsoft license · One-time purchase

Microsoft Office 2021 Home & Business for Windows, Outlook and business use at a lower price

Microsoft Office 2021 Home & Business for Windows gives you Word, Excel, PowerPoint and Outlook on one Windows PC, with a license that covers commercial use, for a single payment. It costs less than the 2024 edition and suits PCs that need the core apps for everyday business work, or offices that already run Office 2021.

✓ Genuine license
✓ Key by email in minutes
✓ Includes Outlook
✓ Free install support

Support status

Office 2021 support status, in plain terms

Microsoft ended support for Office 2021 on October 13, 2026. Office 2021 Home and Business installs, activates, and keeps working, and your files open as normal, but it no longer receives security updates. For most buyers, Office 2024 Home and Business is the better choice, because it is supported until 2029. We would rather tell you that than sell you the wrong thing.

What’s included

Four essential apps in Microsoft Office 2021 Home & Business

Everything you need for client work, financial reports, presentations, and daily email, installed on your PC and ready to use offline.

Word 2021

Write letters, proposals, reports, and contracts with track changes, real-time co-authoring, and PDF export.

Excel 2021

Build budgets, invoices, and financial reports with dynamic arrays, XLOOKUP, and clear, intuitive charts.

PowerPoint 2021

Create presentations for clients and teams with design ideas, presenter view, and easy multimedia support.

Outlook 2021

Manage email, calendar, and contacts in one desktop app, for business or personal accounts.

Who it’s for

Who should buy Office 2021 Home & Business?

Microsoft Office 2021 Home and Business is still the sensible answer in a few specific situations.

Outlook at a lower price

You need Word, Excel, PowerPoint, and Outlook for business use, and price matters more than having the newest version.

Matching your setup

Your office already runs Office 2021, and you want the same version on another PC so files, templates, and add-ins behave the same way.

Offline or dedicated PCs

A PC that rarely goes online, or is used for one job such as bookkeeping, where the lack of new security updates matters much less.

Otherwise, choose 2024

If you open outside email attachments every day or handle confidential data, Office 2024 Home and Business is the safer choice.

Compatibility

System requirements for Microsoft Office 2021 Home & Business for Windows

Check that your PC meets these minimums before you buy. This is a Windows license and will not activate Office on a Mac; Mac users can see our Office for Mac range.

Operating systemWindows 10 or Windows 11

Processor1.1 GHz or faster, 2-core

Memory4 GB RAM (64-bit), 2 GB RAM (32-bit)

Storage4 GB available disk space

Display1280 × 768 screen resolution

InternetInternet required for activation; works offline after installation

Compare editions

Microsoft Office 2021 Home & Business vs. other editions

Here is how it compares with Home and Student 2021 and with the newer Home and Business 2024.

Feature	Home & Student 2021	Home & Business 2021	Home & Business 2024
Word, Excel, PowerPoint	✓	✓	✓
Outlook	—	✓	✓
Commercial use	—	✓	✓
Newest Office features	—	—	✓
Microsoft security updates	Ended Oct 2026	Ended Oct 2026	Until 2029
Windows / Mac	Both	Both	Both

All editions are genuine, one-time purchase, lifetime licenses with email delivery within 30 minutes. See all Office 2021 editions.

FAQ

Frequently asked questions

Quick answers about Microsoft Office 2021 Home and Business for Windows.

Does Office 2021 still work now that support has ended?

Yes. Office 2021 Home and Business installs, activates, and works as normal, and your documents open exactly as before. What has stopped is the supply of new security updates from Microsoft, so newly discovered flaws are not patched.

Should I buy Office 2021 or Office 2024?

For most buyers, Office 2024 Home and Business is the better choice: it has the same apps, newer features, and support until 2029. Office 2021 Home and Business makes sense when price matters most, or to match an existing Office 2021 setup.

Is this a genuine Microsoft Office license?

Yes. Every key for Microsoft Office 2021 Home and Business is a genuine license that activates directly with Microsoft’s servers. If it ever fails to activate, we will help you fix it or refund you.

Can I use it for my business?

Yes. Office 2021 Home and Business includes a license for commercial use, so you can use it for work, client projects, and your company. Home and Student 2021 is for personal, non-commercial use only.

Does it include Outlook?

Yes. Unlike Home and Student, Home and Business includes Outlook for email, calendar, and contacts, alongside Word, Excel, and PowerPoint.

How quickly will I receive my license?

Your license key and download instructions are emailed within 30 minutes of payment, 24 hours a day, including weekends. If it hasn’t arrived, check your spam folder or contact us.

Is this a subscription like Microsoft 365?

No. Office 2021 Home and Business is a one-time purchase: you pay once and there are no monthly or yearly fees. It is a fixed version of Office, so it won’t add new features over time the way a Microsoft 365 subscription does.

Can I transfer the license to a new computer?

The license is for one PC at a time. If you buy a new computer, uninstall Office from the old one and install it on the new one using your key. If activation is refused, contact our support team and we will help.

What if my license doesn’t activate?

Contact our free live chat or phone support and we will walk you through activation step by step. If we can’t get it working, you are covered by our 30-day money-back guarantee.

Why Atom Software

Why buy from Atom Software?

Buy Microsoft Office 2021 Home & Business for Windows with confidence: genuine licenses, fast delivery, and real people to help.

100% Genuine

Every license activates directly with Microsoft servers.

Fast Delivery

Key delivered by email within 30 minutes, 24/7.

Free Install Support

Live chat and phone help at no extra charge.

Money-Back Guarantee

Full refund if your license fails to activate.

Get Office 2021 Home & Business for Windows

One payment, delivered by email in minutes. For the newest supported version, choose Office 2024 instead.

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