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Microsoft's October 13 Deadline Came and Went. Here's What It Actually Cost Your Office.

Office 2021 just lost security updates for good. Business PCs still on Windows 10 now face a bigger update bill, and Microsoft 365 renewals are arriving at higher prices. Personal Windows 10 PCs, on the other hand, quietly got another year.

By Cybercave Technologies · Oct 17, 2026

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Microsoft releases its monthly security fixes on the second Tuesday, known as Patch Tuesday. This month that was Oct. 13, 2026, and it was also the cutoff for several products that plenty of small offices still use. There's a lot of conflicting information online about what that date meant, so here's what Microsoft's own documentation says, as of Oct. 17.

1. Office 2021 is done, with no extension

Confirmed: Microsoft's support page says support for Office 2021 ended Oct. 13, 2026. It also says there will be no extension and no paid extended security updates. That covers the one-time-purchase versions many small businesses bought, like Office Home & Student 2021 and Office Home & Business 2021. Microsoft's lifecycle site lists Office LTSC 2021, the volume-licensed version, as ending the same day.

Your copy of Word or Excel won't stop opening. But Microsoft is no longer fixing security holes or bugs, and phone and chat support for it are gone. Office files are one of the most common ways malware gets in, because they arrive as email attachments every day. That makes an unpatched Office install a real problem.

What to check: In any Office app, go to File > Account. If it says "Office 2021" or "Office LTSC 2021," that computer is affected.

2. Windows 10: different deadlines for personal and business PCs

This is where a lot of the confusion is coming from.

For personal/home PCs (confirmed): Microsoft's consumer Extended Security Updates (ESU) page now says enrollment stays open, and enrolled PCs keep getting critical and important security fixes, through Oct. 12, 2027. If you're already enrolled, you don't need to do anything. Many guides published earlier said the consumer program ended Oct. 13, 2026, and those are now out of date. BleepingComputer reported on June 25, 2026 that Microsoft made the change quietly, through updated documentation and an editor's note on a Windows blog post, and published a Microsoft statement confirming it; TechRepublic reported the same on June 26. Microsoft's page lists three ways to enroll: at no extra cost if you sync your PC settings to a Microsoft account, by redeeming 1,000 Microsoft Rewards points, or with a one-time $30 purchase. One ESU license covers up to 10 devices.

Microsoft says consumer ESU is for personal devices and "can't be used in commercial scenarios." It isn't offered on PCs joined to a company domain or Microsoft Entra, or managed through mobile device management.

For businesses (confirmed): Commercial ESU, sold to organizations through volume licensing and Microsoft partners, works on a different schedule. Microsoft's lifecycle table shows Year 1 ended Oct. 13, 2026, and Microsoft's Partner Center documentation says Year 2 coverage runs Oct. 14, 2026 to Oct. 12, 2027. The price is $122 per device for Year 2 (calculated from Microsoft's $61 Year 1 price, which Microsoft says doubles each year; Microsoft partner listings show the same $122). Coverage is cumulative, so a business that skipped Year 1 has to buy it too, which works out to $183 per PC to get covered now.

Example: Five Windows 10 PCs that skipped Year 1 would cost about $915 to bring under ESU for the coming year. And that only buys security patches. ESU comes with no new features and no general tech support.

Also ending: Microsoft's lifecycle table shows the third and final year of paid ESU for Windows Server 2012 and 2012 R2 ended Oct. 13, 2026. If a back-room server is still running it, there are no more security updates of any kind.

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3. Microsoft 365 renewals are coming in higher

Confirmed: Microsoft's licensing site lists new commercial prices that took effect July 1, 2026. Existing customers keep their old price until renewal. Many small businesses renew annually, so this fall's renewals are when a lot of offices will first see the increase. CNBC reported the planned increases when Microsoft announced them in December 2025.

Per-user, per-month list prices (USD):

• Microsoft 365 Business Basic: $6.00 → $7.00 (+16%)
• Microsoft 365 Business Standard: $12.50 → $14.00 (+12%)
• Microsoft 365 Business Premium: unchanged at $22.00
• Microsoft 365 Apps for business: $8.25 → $10.00 (+21%)

Example: A 10-person office on Business Standard will pay about $180 more per year at list price ($1,500 → $1,680). Microsoft says the higher-priced plans also gained some features, including 50 GB more mailbox storage and link-click protection on Basic and Standard. Actual prices can vary by reseller and contract.

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Sources (all accessed/as of Oct. 17, 2026)

1. Microsoft Support, "End of support for Office 2021" (primary) — https://support.microsoft.com/en-us/office/system-requirements/end-of-support-for-office-2021
2. Microsoft Learn, "Office LTSC 2021 reaching end of support on October 13, 2026" (primary) — https://learn.microsoft.com/en-us/lifecycle/announcements/office-ltsc-2021-end-of-support
3. Microsoft, "Windows 10 Consumer Extended Security Updates (ESU)" (consumer page; Oct. 12, 2027 end date; enrollment options; 22H2/latest-update/admin Microsoft-account prerequisites; not for commercial use) (primary) — https://www.microsoft.com/en-us/windows/extended-security-updates
4. Microsoft Support, "Windows 10 support has ended on October 14, 2025" (primary) — https://support.microsoft.com/en-us/windows/deployment/updates-lifecycle/windows-10-support-has-ended-on-october-14-2025
5. Microsoft Learn, "Extended Security Updates (ESU) program for Windows 10" ($61 Year 1, doubles yearly, cumulative) (primary) — https://learn.microsoft.com/en-us/windows/whats-new/extended-security-updates
6. Microsoft Learn, "Product Lifecycle FAQ – Extended Security Updates" (Year 1/2/3 end dates; Server 2012 final year) (primary) — https://learn.microsoft.com/en-us/lifecycle/faq/extended-security-updates
7. Microsoft Learn (Partner Center), "Extended Security Updates for Windows 10" (Year 2 coverage Oct. 14, 2026 – Oct. 12, 2027; partners must purchase Year 1 and Year 2) (primary) — https://learn.microsoft.com/en-us/partner-center/customers/extended-security-updates
8. o365hq, CSP listing "Windows 10 ESU Year 2" ($122; Year 1 $61, Year 3 $244; per "Microsoft NCE Software price list (US), October 2026") — https://o365hq.com/license/CSP-DG7GMGF0SSGZ-0001
9. Microsoft Licensing, "Microsoft 365 Pricing and Packaging Updates," Feb. 16, 2026 (July 1, 2026 price table) (primary) — https://www.microsoft.com/en-us/licensing/news/2026-m365-packaging-pricing-updates
10. BleepingComputer, Lawrence Abrams, "Microsoft quietly extends free Windows 10 ESU support to October 2027," June 25, 2026 (includes Microsoft statement; enterprise ESU "$427" over three years, consistent with $61+$122+$244) — https://www.bleepingcomputer.com/news/microsoft/microsoft-quietly-extends-free-windows-10-esu-support-to-october-2027/
11. TechRepublic, Kezia Jungco, "Microsoft Extends Windows 10 Security Updates to 2027," June 26, 2026 — https://www.techrepublic.com/article/news-microsoft-windows-10-security-updates-2027/
12. CNBC, Jordan Novet, "Microsoft will raise prices of commercial Office subscriptions in July," Dec. 4, 2025 — https://www.cnbc.com/2025/12/04/microsoft-will-raise-prices-of-commercial-office-bundles-in-july-.html

General information only. Corrections: support@cybercavetech.com

Corrections and updates are noted here with the date.

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