Office 2021 vs Microsoft 365: Which Is Better Value in 2026?
Microsoft sells Office in two fundamentally different ways: Office 2021, a one-time purchase that you own forever, and Microsoft 365, a subscription that you pay for annually. Both include the core apps you've always known — Word, Excel, PowerPoint, Outlook. But they're not the same product. Understanding the differences will save you money and frustration.
What You Get with Office 2021
Office 2021 is a perpetual licence — you pay once and own it forever, with no ongoing fees. It includes Word, Excel, PowerPoint, Outlook, OneNote, and (for Professional Plus editions) Access and Publisher. It receives security updates until October 2026, after which Microsoft no longer guarantees patches. The apps work entirely offline and include all the core features most users need. What it does not include: OneDrive storage beyond the free 5GB tier, Teams (the full collaboration app), or any of the AI-powered features Microsoft has been rolling out via Copilot.
What You Get with Microsoft 365
Microsoft 365 Personal (the single-user plan) gives you the always up-to-date versions of all Office apps, 100GB of OneDrive cloud storage, access to Office on up to 5 devices simultaneously, Microsoft Teams, and all new features including Copilot AI tools as they launch. The apps are updated continuously — you always have the latest version without buying again. The subscription costs approximately £59.99/year (or purchase at a discount through retailers like EvelopKeys).
Office 2021 vs Microsoft 365 Personal: Feature Comparison
The Long-Term Cost Comparison
At face value, Office 2021 looks cheaper because there's no recurring cost. But when you factor in the 2026 end of mainstream support, Microsoft 365's continuous updates, and the 100GB OneDrive storage, the calculation changes. If you'd otherwise pay for cloud storage separately, Microsoft 365's included 100GB covers most users' needs entirely. The real question is: do you want to pay once for a version that's already "finished", or pay annually for software that keeps improving?
Best for Most People: Microsoft 365 Personal
For the majority of home and professional users, Microsoft 365 Personal offers better long-term value — especially if you use multiple devices, want OneDrive storage, or care about having the latest features. The annual cost at market prices works out to roughly the same as a coffee per week.
When Office 2021 Makes More Sense
Office 2021 is the right choice if: you work in an environment that cannot be connected to the internet (or prefer offline-only software), you need compatibility with a specific version of Office for business reasons, your employer or school provides cloud storage separately, or you simply prefer owning software outright and don't need Teams or AI features. Organisations that need to budget for software over multiple years also often prefer perpetual licences for the predictability.
What About Microsoft 365 Family?
Microsoft 365 Family extends the Personal plan to up to 6 users, each with their own 100GB OneDrive. If you need to cover multiple people — a household or small team — the per-person cost with Family is significantly lower than buying separate Personal subscriptions. Worth considering if more than one person in your household uses Office regularly.
Common Questions
The Verdict
Office 2021 suits users who want simplicity and no recurring costs. Microsoft 365 is better for anyone who uses multiple devices, values OneDrive storage, or wants to stay on the cutting edge with AI-powered features. For most home users in 2026, Microsoft 365 Personal delivers more value — especially when purchased at a discount from a trusted reseller.
