Is Office 2021 a one-time purchase?

Yes. Office 2021 is a one-time purchase: you pay once, install it, and it keeps working without another invoice ever landing in your inbox. The same is true of the version Microsoft now sells alongside it, Office Home 2024. That is the whole answer in a sentence. The trouble is that the word “one-time” is rarely the real question.

Most people who type this want to know something else: is buying once the smart move, or will I regret it and pay anyway. So instead of leading with a price, I want to lead with the trade-off. What do you get with a perpetual licence, what do you deliberately give up, and who is that a good deal for. Get that right and the price sorts itself out.

Buying once means owning, not renting

A perpetual licence is exactly what the word promises. The programs are yours: Word, Excel, PowerPoint, and in the Professional Plus edition also Outlook, Access and Publisher. Nothing is counting down. The version you install today is the version you still open in five years, in the same shape you first met it.

And there is the heart of the trade. You get security updates, so holes in the software keep getting patched, but you do not get new features. What ships in the box stays as it is. The cloud is not part of the deal either: no OneDrive storage, no documents following you automatically to another device. A one-time Office is software that lives on your computer, and nothing beyond that.

That sounds thinner than it feels in daily use. Most people I know open Word to write and Excel to keep track of something, and both of those programs have been finished for years. The features added after 2021 are almost all about working together in the cloud or clever helpers you try once and then forget. If you do not miss them, you are not missing anything.

One honest distinction worth making: no new features is not the same as no updates. As long as support for your version is running, the security holes keep getting closed. You are not buying a frozen, unsafe package. You are buying a package that no longer changes shape. Whether that suits you is the entire decision.

What the subscription puts on the other side

Microsoft 365 is the other model, and it is a rental rather than a purchase. You pay by the year, and for as long as you pay you always have the newest version, new features the moment Microsoft ships them, and OneDrive cloud storage on top. The family plan also lets several people work at once, each with their own space.

The catch sits in the small print of any subscription: stop paying and the product stops. The apps fall back to a read-only mode. Your files stay yours and you can still open them, but editing is off until you pay again. That is the real difference from a one-time purchase, and it is not a feature but a question of ownership. With the subscription you rent access; with the perpetual licence you own the program.

In money the gap gets concrete. Microsoft 365 Personal costs €99.00 a year (microsoft.com, checked 8 August 2026). A one-time Office Home 2024 sits at roughly €149.00, paid once (microsoft.com, 8 August 2026). So two years of subscription already costs more than the perpetual purchase, and after three or four years the difference stops being subtle. Unless you genuinely use the cloud and the new features, the yearly fee pays for something sitting on a shelf.

Let me be plain about what that cloud actually is, so you can test yourself against it. It means your documents live in OneDrive and reappear on every device you sign in to, that you can work in the same file as someone else at the same time, and that you never lose a version because everything runs online in the background. For anyone who works that way it is worth real money. For anyone who keeps everything on their own PC and makes a backup now and then, it solves a problem they do not have.

The two models side by side

Lay the traits out in a column and one thing jumps out: the choice is not about features, it is about ownership against access. This table works nothing clever out. It just shows exactly what you are paying for.

	One-time Office (Office Home 2024)	Microsoft 365
Payment	Once	Every year
Updates	Security only, no new features	Ongoing, new features included
Cloud	No	Yes, OneDrive storage
Keeps working	Yes, even if you stop paying	No, drops to read-only if you stop
Price	about €149.00 one time	€99.00 per year (Personal)

Does Office 2021 keep working if I stop paying?

With a one-time purchase there is nothing to stop. You did not rent, you bought. There is no subscription to lapse and no switch that locks the door after a year. As long as your computer can run Office, Office runs, whether that is next year or seven years from now. That is exactly why people choose this edition: they would rather not think about it every year, and they do not have to.

Office 2021 or its successor, Home 2024?

A misunderstanding I run into often is that buying Office outright is going away with Office 2021. It is not. Microsoft did not scrap the model, it replaced it with a newer perpetual release, Office Home 2024. Same deal, pay once and keep it, just with somewhat newer programs in the box. The roughly €149.00 price I quoted above belongs to that 2024 release.

For you as a buyer that changes little about the trade-off. Whether you take 2021 or 2024, you are buying the same kind of product: no subscription, no cloud, security updates yes, new features no. The difference is the age of the programs, not the model behind them. If you want the very latest perpetual version you take 2024. If price is what you watch most, Office 2021 Professional Plus often comes out cheaper, especially through the second-hand market covered further down.

What to watch with Professional Plus is that it started life as a business edition sold through volume agreements. That is no objection, but it makes the origin of the licence matter more than a shrink-wrapped shop box. A licence transferred whole is fine. A key snipped out of a larger pack is not, and that is the line between a bargain and a bad buy.

When buying once is the smart move

Here is my actual advice, because “it depends” helps nobody. Buying once is smart if you use the basics, do not want to pay every year, and do not need the cloud or the new features. If that is you, buy once and you are done. You have Word, Excel and the rest, they keep working, and no bill follows.

The subscription is smart for the mirror image: you genuinely use the modern, connected side. You move between three devices, everything goes into OneDrive automatically, you share documents and want everyone on the latest features. Pay €99.00 a year for that while you use it daily and it is not wasted money, it is a service earning its price.

The costliest mistake is the third option nobody chooses on purpose: paying year after year for cloud and features you never touch. That is renting a complicated machine to do a simple job. If you honestly doubt whether you use the cloud, the doubt itself is the best sign the one-time purchase fits you. People who really need the cloud do not hesitate.

What counts as the basics?

The basics sounds vague, so let me be concrete. You type letters, reports or a thesis in Word. You keep a budget, an inventory or a member list in Excel. You make the occasional presentation in PowerPoint and you email in Outlook. For the vast majority of home users that is precisely what Office is for, and all of it lives in a one-time version. Only when your tasks start with real-time co-editing of a single document, or automatic syncing between office and home, do you leave the basics and tip toward the subscription.

Is a one-time licence fine for a small business?

For a sole trader or a small office that mostly makes documents, it is fine. Professional Plus carries Outlook, Access and Publisher, which is usually enough for the admin. Watch one thing: a perpetual licence belongs to a single workstation, so five computers means five licences, and you want to be able to show you bought them legally. If your work instead runs on shared calendars and co-editing in the cloud, a per-user subscription is easier to manage and the better fit.

The second-hand route, and why it is allowed

Here is a side of this that rarely gets said out loud: a perpetual Office licence can legally be resold second-hand within the European Union, and that often saves money. This is not a grey area. The Court of Justice of the European Union confirmed it in the UsedSoft ruling (case C-128/11, from 2012): whoever bought a software licence outright may resell it, provided the whole licence is transferred and the previous owner stops using it.

For you as a buyer that means two things. It is allowed, so a clean second-hand key is a legal way to pay less than you would at Microsoft. And you watch the origin: a licence snipped in pieces out of a large volume agreement does not fall under that rule and can go dark later. The price says nothing about that; the origin says everything. How to spot a trustworthy seller and where the line sits exactly is worked out in is second-hand software legal.

What I would do

If someone asks me across the kitchen table what to get, I ask one thing back: do you use the cloud, or do you only think you might one day. Almost the whole decision falls out of that single answer. Anyone who has to talk themselves into the cloud is not using it.

If you just use Word and Excel on one PC, buy once, pay once, and never think about it again. If you truly work connected, across devices, with documents you share, the subscription is the more honest choice, because then you get what you pay for. If you want to weigh the two models down to the detail, that comparison is written out in full in Office 365 vs Office 2021.

Do the sum if it helps. Pay €99.00 a year for four years and you are close to €400.00 on a subscription, against roughly €149.00 for a one-time purchase that keeps running after those four years. If you never touch the cloud in that time, that gap is the difference between paying for use and paying out of habit. And if you are still on the fence, the one-time purchase is cheap enough to serve as a safety net: take it now, use it as long as it suits you, and move to a subscription only when you have a real reason. Going the other way, from a cancelled subscription back to ownership, is far less pleasant, because you are left with files you may only read.