Office 2021 vs Microsoft 365: One Payment or a Subscription?

Both give you Word, Excel, PowerPoint and Outlook. The difference is what happens after you pay: a perpetual licence is yours indefinitely, a subscription stops working when you stop paying. Which is better depends on two things — how long you will use it, and whether you need what the subscription adds.

A perpetual Office licence

You pay once and the software is yours. It receives security updates for the length of its support lifecycle, but it never gains new features — the version you install is the version you keep.

• One payment, no renewals.
• One PC per licence.
• Works offline; no account sign-in required for Professional Plus and Standard.
• No cloud storage included.

A Microsoft 365 subscription

You pay monthly or yearly. The applications gain new features continuously, and the subscription includes services that a perpetual licence does not.

• Around 1 TB of OneDrive storage per user.
• Installation on several devices, including phones and tablets.
• Family plans covering multiple people.
• Always the current version.
• Everything stops when the subscription lapses — the applications drop to read-only.

The cost over time

A subscription costs less in the first year and more in every year after. A perpetual licence is a single payment that keeps working for as long as the version is supported. The crossover point is usually somewhere in the second or third year — after that, the perpetual licence is ahead and stays ahead.

The calculation only changes if you genuinely use the cloud storage and the multi-device installs. A terabyte of OneDrive per person has real value if you are actually using it; it has none if you are not.

Which version year?

Office 2019, 2021 and 2024 do the same everyday work — the documents you create in one open in the others, and the tools most people use are unchanged between them. The newer releases add refinements to the interface and some newer Excel functions, and they carry a longer support period.

Choose on what fits you: an older version is the better value if you want a familiar Office at a lower price, a newer one if you want the longest runway ahead of it.

Which perpetual edition?

• Office Standard — Word, Excel, PowerPoint, Outlook. Enough for most people.
• Office Professional Plus — adds Access and Publisher. Worth it if you need a desktop database.
• Office Home & Business for Mac — the macOS equivalent, activated through a Microsoft account.

Whichever you choose, the key only activates the edition and version it was issued for — an Office 2021 key will not activate Office 2024. See how to activate Microsoft Office when your key arrives.