Today you can buy MS Office in one of two ways: as a subscription (Microsoft 365) or as a one-time license (Office 2021, or the newer Office 2024). For most home users who just want Word and Excel without a monthly bill, a one-time license is enough, while for companies and anyone working across several devices a subscription almost always pays off more. Below we explain the differences, what Home means versus Business, why you should stay away from pirate activators, and when LibreOffice is a perfectly good free replacement.
By the way — people often type “mc office suite” when messaging us. It means the same thing, Microsoft Office, so if that’s how you landed here, you’re in the right place.
Microsoft 365 or Office 2021/2024 — what’s the difference
Microsoft 365 (subscription)
You pay yearly or monthly and always get the latest version of the Office apps. It also comes with 1 TB of OneDrive storage per user, installation on multiple devices (desktop, laptop, phone, tablet), and regular security updates for as long as the subscription is active. The Family plan covers up to six people, each with their own account and their own terabyte.
The downside is obvious: the moment you stop paying, the apps switch to read-only mode. Your documents stay with you, but you can no longer edit them in Office.
Office 2021 / Office 2024 (one-time purchase)
You pay once and the license is permanent, but for a single computer. You get Word, Excel, PowerPoint (and Outlook depending on the package), with no OneDrive storage and no new features — only security patches for as long as that version is supported. When support ends, the program still works, but you’re left without updates.
This is a good choice if you need Office on a single home computer, type documents, tidy up spreadsheets, and don’t care about the cloud. Retirees, students with a single laptop, a small office with two computers — a one-time license typically suits them just fine.
How to decide
- One computer, basic needs, no monthly costs — Office 2021/2024 one-time license.
- Multiple devices, several family members, you need cloud backup — Microsoft 365 Family.
- A company with business email and shared documents — Microsoft 365 Business (more on that right below).
Home or Business edition
The Home packages (Microsoft 365 Personal and Family) are tied to a private Microsoft account and are meant for personal use. Officially you’re not allowed to use them for commercial work, though in practice the main difference is in what you DON’T get.
The Business packages bring what a company actually needs: business email on its own domain (Exchange), Teams for meetings, SharePoint for shared documents, central management of employee accounts, and better security control. When an employee leaves the company, an administrator shuts down their account with a single click — with private licenses you don’t have that.
From our experience with the companies we support: once you have more than two or three employees and email on your own domain, a Business subscription solves a pile of problems you’d otherwise be patching by hand. And if on top of that you use qualified electronic certificates for e-invoices and signing, we also handle certificate installation on business computers, so everything fits into the same work environment.
What’s legal — and why not pirate activators
Legal: buying through the official Microsoft website or from authorized resellers. Always check current prices and packages directly on microsoft.com — we deliberately don’t list them here because they change, and they also vary by region.
Illegal: “activators” such as KMS scripts downloaded from forums, keys for a couple of euros from shady sites (usually stolen volume keys that get killed off afterward), and “repackaged” Office installs from torrents.
We don’t write this on principle but from the repair bench. We regularly get computers where someone “activated Office for free,” and afterward we had to clean up:
- Malware slipped in through the activator. KMS activators ask you to turn off your antivirus so they’ll “work” — and that’s exactly the moment something that steals passwords or mines crypto in the background gets into your system. We’ve seen laptops that ended up as slow as if they were ten years older because of it.
- Blocked keys. A key from a shady site works for three months, then Microsoft revokes it. Office locks up mid-task, usually right when you need it least.
- A system that no longer receives updates properly, because the activator altered system services. The end result is often a complete system cleanup and a Windows reinstall from scratch — which costs more time and money than buying the license the proper way would have.
If you inherited a computer with that kind of “activation” and you’re not sure what’s inside, bring it to one of our three shops or call us to have a courier pick up the device — we’ll check the system, clean it up, and set up a legal Office or a free alternative.
LibreOffice — when free is perfectly enough
Not everyone needs paid Office. LibreOffice is free, legal, and open source: Writer instead of Word, Calc instead of Excel, Impress instead of PowerPoint. It opens and saves .docx and .xlsx files, works in Serbian, and for typing documents, home spreadsheets, and simple presentations it does the job without costing a single dinar.
Where LibreOffice stumbles:
- Complex Word documents with a lot of formatting can “fall apart” when opened — which is a problem if you exchange files with someone who uses real Office.
- Excel macros (VBA) mostly don’t work. If a company has spreadsheets with macros, LibreOffice is not a replacement.
- There’s no Outlook equivalent in the suite — for email you need a separate program, such as Thunderbird.
Our practice: when we do a system reinstall, we ask the user what they use the computer for. If the answer is “to type something up and print it,” we suggest LibreOffice and the person doesn’t spend money for no reason. If documents are exchanged with companies, a school, or a university — legal MS Office is the safer choice, because the files display the same for everyone.
Installation and setup — what we do
At the shop we handle installing and activating the Office suite with your legal license, transferring a license to a new computer (with one-time versions this can get tricky if the old computer has been written off), setting up Outlook accounts and migrating email, as well as a full system cleanup when a pirate activation has made a mess. Prices for our services are on our price list.
For private individuals everything is simple: a courier picks up the computer or laptop, we fix it, the courier brings it back. You can also come in person — two of our shops are in New Belgrade (near the Arena and near the Piramida), and the third is by the Botanical Garden.
Frequently asked questions
Does Office 2021 work without internet?
Yes. After activation, a one-time license doesn’t require a constant connection. Microsoft 365 also works offline, but it has to connect from time to time to confirm the subscription.
I have a key from an old Office 2010/2013 — can I use it?
Technically some old versions can still be installed, but their support ended long ago, so there are no security updates. For a computer that goes online we don’t recommend it — better to get a new license or LibreOffice.
Is an “Office key for 300 dinars” from a classified ad legal?
Almost never. Those are usually abused volume keys that get blocked afterward. Buy through the official Microsoft website or authorized resellers — anything else risks leaving you without both your money and Office.
Can you switch from Microsoft 365 to a one-time license?
You can. Your documents stay untouched, you just install Office 2021/2024 with your own key and sign in. The only thing you lose is OneDrive storage above the free 5 GB, so move your files from the cloud to your computer or an external drive beforehand.