Short answer: According to Microsoft's support page (checked 2026-10-25), support for Office 2021 ended on October 13, 2026. Your apps do not stop working: Microsoft says they "may continue to function". What stopped is security fixes, software updates and technical support, so the risk grows over time. You can move to Microsoft 365, buy a newer one-time version, or keep Office 2021 for a while with extra care.
Last reviewed: October 25, 2026.
Key takeaways
- Office 2021 reached end of support on October 13, 2026, per Microsoft's support page. The Microsoft Lifecycle page lists the retirement timestamp as 10/14/2026 6:59:59 AM Pacific, which is the same cut-off expressed in Pacific time.
- Word, Excel, PowerPoint and Outlook keep opening and saving files. Nothing is switched off by Microsoft.
- No more security fixes, updates or phone and chat support, and Microsoft's page does not list an extended security update program for Office 2021.
- Your realistic options are Microsoft 365, a newer one-time version, free web apps for light use, or staying put as a short-term, higher-risk choice.
- Check which Office you have first (File, then Account), and never buy a cheap "lifetime key" from a random seller.
What exactly ended on October 13, 2026?
Microsoft's page "End of support for Office 2021" states that support ended on October 13, 2026. That page names two editions: Office Home & Student 2021 and Office Home & Business 2021. The Microsoft Lifecycle pages give a fuller list.
| Product (Microsoft Lifecycle) | Editions listed | End date shown |
|---|---|---|
| Office 2021 | Home and Business, Home and Business for Mac, Home and Student, Home and Student for Mac, Professional | 10/14/2026 6:59:59 AM PT |
The Lifecycle pages say dates are shown in Pacific Time. That timestamp falls on the morning of October 14 in Pacific time, while Microsoft's support article says October 13. Either way, the cut-off has now passed. If you need the exact moment for a compliance record, quote Microsoft's own pages rather than this article.
Check your exact product on Microsoft Lifecycle, especially if you have a volume-licensed or LTSC edition, because we only list the editions we could confirm.
What stops, and what keeps working
What stops
According to Microsoft's end-of-support page:
- Technical support, bug fixes and security fixes, including for vulnerabilities reported or discovered later.
- Office 2021 software updates.
- Phone and chat technical support.
- Updates to support content, and most online help will be retired.
What keeps working
Microsoft says all of your Office 2021 apps may continue to function, but you could be exposed to serious security risks. In plain English: you can still write letters, build spreadsheets and read email in Outlook. Nobody remotely deletes or locks your installed apps.
The catch is that new weaknesses found in Office from now on will not be patched for you. Documents are one of the most common ways attackers get in, usually through a booby-trapped attachment. Our guide to what phishing is explains how those emails work.
Do I need to act today?
Probably not today, but do not leave it for years. A sensible rule of thumb for home users and small businesses:
- Handles client data, invoices, email with customers, or banking: plan the move within weeks.
- Personal PC, occasional use, no sensitive files: you have more breathing room, but still set a date.
- Regulated work (health, legal, accounting): treat unsupported software as a compliance question and ask your advisor.
Step 1: Check which Office you actually have
Many people assume they have Microsoft 365 when they actually own a one-time Office 2021 purchase, or the reverse. Microsoft 365 subscriptions keep receiving updates, so you only need to act if you have Office 2021.
- Open Word or Excel and create a blank document.
- Click File, then Account. If you do not see Account, look under Help, as Microsoft's article "About Office: What version of Office am I using?" notes.
- Under Product Information, read the product name. It will say something like "Office Home & Student 2021" or "Microsoft 365 Apps".
- Click About Word (or About Excel) to see the build and whether it is 32-bit or 64-bit.
- On a Mac, open the app menu in the menu bar and choose About to see the version and licence type.
Outlook is the exception: if you get it through a Microsoft 365 subscription, it will not show a year. Check Word instead.
Step 2: Understand your options
Here is how the realistic choices compare. We deliberately leave prices out because they vary by country and change often; use Microsoft's own store for current figures.
| Option | Gets security updates? | Payment model | Best for | Watch out for |
|---|---|---|---|---|
| Microsoft 365 (subscription) | Yes, while subscribed | Recurring | People who want the newest apps and cloud features, or several devices | Ongoing cost; access to apps changes if you stop paying |
| Office 2024 (Home, or Home & Business) | Yes, until 10/10/2029 per Microsoft Lifecycle | One-time | One PC or Mac, no wish for a subscription | Fixed feature set; another end date in 2029 |
| Free Office on the web | Managed by Microsoft online | Free with a Microsoft account (feature limits apply) | Light editing, viewing, quick documents | Fewer features than desktop apps; needs internet |
| Stay on Office 2021 | No | None | Short-term, low-risk, offline use only | Growing exposure; no Microsoft support |
The Lifecycle pages for Office 2024 list Home and Home & Business (Windows and Mac) with a retirement date of 10/10/2029,. Microsoft's own end-of-support article for Office 2021 points home users to Microsoft 365 purchase or trial options and tells work or school users to contact their IT help desk. It does not discuss Office 2024 on that page, so confirm current availability and edition details in the Microsoft Store before buying.
How to choose
- You use Word and Excel a few times a month: try the free web apps first. You may not need to buy anything.
- One computer, no cloud storage needs: a newer one-time version is usually the simplest match.
- Several devices, family sharing, or you want the latest features: a subscription is usually easier to manage.
- A business with several staff: compare subscription and licensing models together, and ask who manages licences. Our Microsoft 365 page explains how we help with that.
Not sure what is wrong? Get a diagnosis first.
Our certified tech can connect remotely, check your software, drivers and backups, and tell you honestly whether the problem needs a hands-on repair.
Step 3: Back up before you change anything
Whichever route you take, copy your documents first. Upgrading Office normally keeps your files, but a backup costs nothing and protects you from a failed install or a mistaken uninstall.
- Copy your Documents, Desktop and any Office template folders to an external drive or a cloud folder.
- In Outlook, note which accounts you use. IMAP and Microsoft 365 mailboxes live online, but a local PST data file does not, so back it up separately.
- Write down (or screenshot) your Office licence details from the Account page, plus any add-ins you rely on.
If you run a small business, a proper backup routine matters well beyond this migration. See our cloud backup guide for businesses.
Step 4: Install the new version safely
- Sign in to your Microsoft account and install from Microsoft's own site or store, not from a download link in an email or ad.
- Install the newer Office. Once the new version works, you can uninstall Office 2021 from Settings, Apps (Windows) or by moving the apps to the Bin on a Mac.
- Open each app once and confirm you can see your files and that activation shows a licensed status under File, Account.
- Run Windows Update so the rest of the system is current too. If it hangs, see our Windows Update stuck or failing fix.
Do not delete your old install until the new one opens your key documents correctly.
Licence and product key safety
End-of-support dates create the perfect moment for scammers. Cheap "Office for life" offers are a recurring problem, so keep these rules in mind:
- Buy from Microsoft or a clearly authorized retailer. If a key costs a tiny fraction of the normal price, assume something is wrong with it.
- Be wary of activation tools and "cracks". They are a common way to get malware onto a PC, and they also defeat the point of moving to a supported version.
- Beware of fake "your Office has expired" pop-ups and calls. Microsoft does not phone people to say their Office is unsafe. If a pop-up or caller pushes you to pay urgently or install remote software, close it and check File, Account yourself.
- Keep your proof of purchase. Store the receipt email and the Microsoft account the licence is tied to.
- Never share your Microsoft account password or one-time codes with anyone who contacts you first.
If you decide to stay on Office 2021 for now
It is a legitimate short-term choice for some people, as long as you accept the trade-off. To reduce risk:
- Keep Windows or macOS fully updated. Our October 2026 Patch Tuesday guide explains what the latest Windows updates include.
- Do not open Office attachments you did not expect, even from known senders, until you confirm by another channel.
- Leave Protected View and macro blocking switched on. Do not disable security features to work around a document.
- Use reputable security software and keep regular, tested backups.
- Use Outlook only if you need it, and consider browser-based email for risky mail.
- Set a firm migration date, for example the end of your next quiet month.
Common mistakes
- Thinking the apps will stop opening. They will not, per Microsoft.
- Assuming "no news" means "no risk". Missing patches cannot be seen, which is why this is easy to ignore.
- Uninstalling Office 2021 before backing up.
- Buying the wrong edition. Business use generally needs a commercial licence; check the licence terms for your edition.
- Paying twice. You may already have Microsoft 365 through work, school, or a family plan. Check before buying.
Related older versions
If you still run something older than 2021, you are in the same situation or worse. A university IT notice (WSU) states that Office 2016 and 2019 also lost support before Office 2021 did. We cite that notice as a secondary source and have not verified it against Microsoft Lifecycle, so check your version there.
Want a technician to do this with you?
If you would rather not juggle licences, backups and installs alone, our technicians can work on your computer with you remotely. See remote repair and Windows support for how a session works.
Frequently asked questions
When did Office 2021 support end?
Microsoft's support page says October 13, 2026. The Microsoft Lifecycle page shows 10/14/2026 6:59:59 AM Pacific time for the retirement date, which is the same cut-off shown in Pacific time.
Will Office 2021 stop working?
No. Microsoft says your Office 2021 apps may continue to function. What ends is security fixes, updates and technical support.
Does this affect Office LTSC 2021?
Check your exact edition on Microsoft Lifecycle. We confirmed the Office 2021 retirement time of 10/14/2026 6:59:59 AM Pacific, and we did not verify the volume-licensed LTSC pages.
Does this affect Office 2021 for Mac?
Yes. Microsoft Lifecycle lists Home and Business for Mac and Home and Student for Mac under Office 2021 with the same retirement date.
Can I pay for extended security updates for Office 2021?
Microsoft's end-of-support page does not list an extended security update program for Office 2021. Check Microsoft's page for any change.
Do I have to buy Microsoft 365?
No. Microsoft lists Microsoft 365 as one upgrade path. Newer one-time versions such as Office 2024 appear on Microsoft Lifecycle with support through October 2029, and free web apps cover light use.
How do I check my Office version?
Open Word, choose File, then Account, and read the product name under Product Information. On a Mac, use the About entry in the app menu.
Is it safe to keep using Office 2021?
It carries growing risk because new vulnerabilities will not be patched. It can be a short-term choice if you take extra care and plan a move.