The Office You Bought Once Stops Getting Fixes

The estimator at a small fabrication shop has quoted every job for six years from the same Excel workbook. It has macros, a price table, and a tab nobody else is allowed to touch. It runs on a copy of Office the owner bought at the store in 2022, because a monthly subscription "felt like renting a hammer."

That was a reasonable call at the time. It comes with a date attached, though, and the date is next week.

On October 13, Microsoft ships the last security fix for Office 2021. Microsoft's own support page says there will be no extension and no paid extended updates. Word, Excel, and Outlook will keep opening the next morning. Nothing on screen will change. That is exactly why this one gets missed.

What is actually ending

Office comes in two flavors. One is the subscription, Microsoft 365, which updates itself and never reaches an end date as long as you keep paying. The other is the one-time purchase: Office 2016, 2019, 2021, and now 2024. You buy it once, and it gets security fixes for a fixed number of years.

Office 2016 and 2019 reached that point a year ago. Office 2021 reaches it on October 13. That covers Home and Business, Home and Student, Professional, and the Mac versions, plus the volume-licensed edition larger companies bought in bulk.

If every computer in your company signs in to Microsoft 365 and gets Office from there, this deadline does not apply to you. That is a good answer. It is worth confirming, not assuming.

Why an old copy of Office matters

It is tempting to think of Office as harmless. It is just spreadsheets. But Word and Excel are the programs that open whatever arrives by email. Invoices, purchase orders, bid packages, resumes, a "revised drawing" from a supplier you have never heard of.

A booby-trapped attachment is one of the oldest ways into a small company. When a new flaw in Word or Excel is found, the fix arrives through updates. After October 13, on Office 2021, it does not arrive at all. The person who opens the attachment does nothing wrong. They open a file, exactly the way they did yesterday.

Your insurer will ask about this too. We covered what the renewal questionnaire actually asks last month. Unsupported software is on it, and "we did not know it was out of support" is not an answer that helps.

What actually goes wrong

Nobody knows which computers have which version. One-time Office gets bought a box at a time, over years. The front office has 2021, the shop floor PC has 2016, the new hire's laptop came with something else. Until someone checks each machine, the honest answer is "probably a mix."

The license belongs to someone who left. Store-bought Office is often tied to whoever set it up, sometimes on their personal email address. When that person is gone, so is the easy way to reinstall or move it to a new computer.

The wrong edition was bought. Home and Student was licensed for personal, noncommercial use only. It shows up in small businesses more often than you would think, usually because it was cheapest on the shelf.

The workbook that runs the business. Estimating sheets, job costing templates, and small databases built years ago by someone handy. They usually work fine on a newer version. Usually is not the same as tested, and the morning a quote will not calculate is the wrong time to find out.

The rushed switch, or no switch at all. Some companies hear "end of support" and move every computer onto the subscription in one weekend, with no plan for licenses or files. Others ignore it entirely. Both cost more than a short list and a schedule.

What good looks like

A company in good shape here can answer three questions in one page.

Which version is on each computer? A list, by machine, with the person who uses it. Anything 2021 or older gets a line beside it.

Who owns the licenses? Every license tied to a company account, not a personal one, and recorded somewhere other than one person's memory.

Which files must keep working? The handful of workbooks and templates the business cannot run without, each with a name beside it for testing.

Then pick a direction per machine. For most companies, Microsoft 365 is the simpler answer. Office stays current on its own, and licenses move with people instead of with computers.

But it is not the only honest answer. Office 2024 is the current one-time purchase, and Microsoft supports it until October 2029. For a shared shop floor computer that opens one spreadsheet and nothing else, that can be perfectly sensible. Just write the 2029 date down somewhere you will see it again.

This is the same decision many of you made with the Windows 10 deadline, on a smaller scale. If a computer is old enough to still run Office 2021 and Windows 10, plan them together rather than paying for each separately.

What to do about it this month

Check one computer in thirty seconds. Open Word, click File, then Account. Under "Product Information" it names the version. "Microsoft 365" means you are covered. A year means you have a date to look up.

Then check every computer. Ask your IT provider for the list by machine. If you do not have a provider, a manager with a clipboard can do this in an afternoon for a 20-person company.

Test the files that matter first. Before switching anyone, open the estimating workbook and the job costing template on a current version. Have the person who uses them run one real job through.

Move company licenses onto company accounts. Whatever you buy next, buy it under an account the business owns.

Do not panic about next Tuesday. Nothing breaks on October 14. The risk grows month by month, so set a date this quarter and keep it. A plan finished by year end is fine. No plan at all is not.

Not sure what is on your computers?

Most owners are not, and that is normal. Office was bought a box at a time, long before anyone was keeping a list.

Finding out is part of our free IT assessment. You get a plain list of what version runs where, who owns each license, and a realistic plan for each machine. It takes about two weeks and a few hours of your time.

What you do with it is your call. Hand it to us, to your current provider, or to whoever handles your day-to-day IT support. The point is to decide on purpose, before the last fix ships and is forgotten.