Office 2021 support ends 14 October 2026: your 3 options

Office 2021 and Office LTSC 2021 reach end of support on 13 October 2026, US Pacific time — 14 October 2026 in Australia. Security updates stop; the apps keep running. There is no paid extension. Australian businesses have three exits: a Microsoft 365 subscription, Office 2024, or accepting the risk unpatched.

Most people who bought Office 2021 bought it for one reason: to pay once and avoid a subscription. That logic was sound, and nothing about it stops being sound in October. Microsoft is not reaching into anyone's computer to switch anything off. What changes is quieter and slower: the last security patch ships, and every vulnerability found in Word, Excel or Outlook after that date stays open on your machines forever. The decision is not whether to panic. It is which of three exits to take, and when.

What actually stops on 14 October 2026?

Microsoft's lifecycle announcement, published in April 2026, is short and specific about what ends.

• Security updates end. The monthly patches that close newly discovered vulnerabilities in the Office applications stop arriving. This is the one that matters.
• Bug fixes end. If a Windows update or a file-format quirk breaks something in Office 2021, Microsoft will not repair it.
• Technical support ends. Microsoft will not take support cases for the product, and neither will it troubleshoot problems that involve it.

What keeps working: everything, at first. The applications open, documents load and save, the perpetual licence remains valid and activation is unaffected. There is no kill switch and no expiry screen. That is exactly why this deadline is easy to ignore, and why the risk builds invisibly rather than announcing itself.

Which products does the date cover?

The entire 2021 desktop generation retires on the same date, verified against Microsoft's lifecycle database in July 2026:

• Office 2021 retail editions: Home and Student, Home and Business, and Professional, on both Windows and Mac
• Office LTSC 2021 Standard and Standard for Mac — the volume-licensed edition many Australian businesses deployed
• Every standalone 2021 application: Access, Excel, OneNote, Outlook, PowerPoint, Project, Publisher, Word, plus Visio LTSC 2021 and Skype for Business LTSC 2021

That last line catches people out. A business that moved its main licences years ago often still has a standalone Visio 2021 on the drafting PC or an Access 2021 running an internal database. Those carry the same 13 October 2026 retirement date as the full suite.

Does Outlook 2021 stop connecting to Microsoft 365?

Not on the day — but this is the pressure point most Australian coverage misses. Microsoft maintains a support matrix for which Office versions are supported when connecting to Microsoft 365 services such as Exchange Online, SharePoint Online and OneDrive. Office LTSC 2021 falls off that matrix on 13 October 2026, the same day support ends. Project 2021 and Visio 2021 fall off with it.

Microsoft's own wording is that older versions might still be able to connect, but that connectivity is not supported: the service keeps evolving without any testing against the old client, so features degrade and reliability problems appear over time, and Microsoft will not help when they do. This is not theoretical. Office 2016 and 2019 lost supported connectivity in October 2023, and users of those versions have since met exactly this pattern of gradual breakage. If your business runs Outlook 2021 against Exchange Online — a very common combination — you will be running an unsupported client against a moving service from 14 October 2026 onward. Mail is the workload where quiet degradation hurts most.

Option one: move to Microsoft 365 — what does it honestly cost?

This is the subscription you were avoiding, so here are the real numbers rather than a sales pitch. All prices below are Microsoft's published Australian list prices, per user per month, excluding GST, on an annual commitment — checked July 2026 against microsoft.com. Add 10 per cent GST to estimate the amount on the invoice, and re-check the page before budgeting, because Microsoft revises list prices.

• Microsoft 365 Business Basic — AU$10.50: web and mobile apps only, plus business email, Teams and 1 TB OneDrive. No desktop Word or Excel, so it does not replace Office 2021 on its own.
• Microsoft 365 Apps for Business — AU$15.80: the always-current desktop Office applications with no email or Teams. The closest like-for-like replacement if all you want is what Office 2021 gave you.
• Microsoft 365 Business Premium — AU$32.90: desktop apps, email and Teams plus Intune device management and Defender for Business. The security baseline Frontrow recommends for most small businesses.
• Microsoft 365 Business Standard with Copilot — AU$35.20: desktop apps, email and Teams with Copilot included.
• Microsoft 365 Business Premium with Copilot — AU$47.90: the Premium security stack with Copilot included.

Two honest observations on that list. First, Microsoft's Australian site now sells Business Standard with Copilot bundled in — the plan lineup has shifted so that the mid-tier plans carry Copilot whether or not you asked for it. Second, the arithmetic for an apps-only business is straightforward: ten users on Apps for Business is AU$158 a month excluding GST, roughly AU$1,896 a year. Whether that beats buying Office 2024 outright depends on how long you keep hardware and whether you use the bundled services — it is a calculation, not a foregone conclusion.

Option two: buy Office outright again

The perpetual-licence path still exists, and Microsoft's own announcement names it as the recommended route for organisations not ready for the cloud. Office 2024 (retail, Home and Home & Business editions) and Office LTSC 2024 (volume licensed: Standard, Professional Plus and Embedded) are both supported until 9 October 2029, US Pacific time — verified on Microsoft's lifecycle pages in July 2026. Buying the 2024 generation purchases roughly three more years of patched, supported software with no subscription.

• The same cliff returns in October 2029 — this option defers the decision, it does not retire it.
• There is no Publisher in the 2024 generation. Publisher ends with the 2021 wave; businesses using it need a replacement regardless of which exit they choose.
• Supported connectivity to Microsoft 365 services runs only to October 2029 for the 2024 generation. If your email is already in Exchange Online, a subscription is usually the cleaner fit.
• No Copilot and none of the continuously updated features — for many businesses that is a feature, not a flaw, but say so deliberately.
• Pricing varies by reseller and edition, so get a live quote rather than trusting a figure from an article — including this one, which deliberately quotes none.

Option three: do nothing — what actually happens?

Honestly: nothing, on the day. Your documents open on 15 October exactly as they did on 13 October. The risk is cumulative, not immediate. Office file formats and Outlook are among the most attacked surfaces in business computing, because a malicious attachment is still the cheapest way into a company. Every Office vulnerability disclosed after October 2026 remains permanently open on a 2021 install, and attackers routinely reverse-engineer the patches Microsoft ships for supported versions to find the same holes in unsupported ones. A machine that receives email with Outlook 2021 carries materially more of this risk than an offline PC that edits local spreadsheets — if you must keep a 2021 install somewhere, keep it off email.

Two second-order costs deserve a mention without exaggeration. Unsupported software is a straightforward miss against the Essential Eight's patch-application controls, which matters if your business is measured against them. And cyber insurance questionnaires commonly ask whether end-of-life software is in use; answering yes can affect terms, and answering incorrectly can affect claims.

One thing cannot be bought at any price: more time. Windows 10 has a paid Extended Security Updates program. Office does not, and never has — not for Office 2016 and 2019 when they retired in October 2025, and not for Office 2021 now. Microsoft's end-of-support announcement offers exactly two paths, Microsoft 365 Apps or Office LTSC 2024, and no security-update extension of any kind. Any budget line item labelled 'Office ESU' is a fiction.

How should a business sequence this before October?

1. 1Inventory every 2021-generation install, including the easy-to-forget standalones: Visio, Project, Access and any per-app licences bought separately from the suite.
2. 2Split users into cohorts: apps-only users, email-plus-apps users, and anyone handling sensitive data who justifies the Business Premium security stack.
3. 3Pick an exit per cohort and price it properly — GST on top of list prices, annual commitment timing, and any existing licence agreements that expire mid-change.
4. 4Schedule the migration for August or September 2026. October is the worst possible month to start, because the Windows 10 ESU decision lands in the same week and IT providers will be saturated.
5. 5Record the decommissioning of the old installs. That record is your evidence for insurance questionnaires and Essential Eight assessments.

None of this is difficult, but all of it takes calendar time — licence procurement, mail profile changes, and user communication each have lead times. A business that starts in August does this calmly. A business that starts on 15 October does it as an incident.