In a world that increasingly pushes software-as-a-service subscriptions, Microsoft Office 2021 Professional Plus occupies an interesting position: a perpetual licence that gives you powerful, modern productivity software without a recurring monthly fee. With Office 2024 now available and Microsoft 365 subscriptions dominating the conversation, it is worth asking whether Office 2021 still makes sense in 2026. The short answer is yes — and for many users, it remains the best-value option available. Here is why.
What Is Office 2021 Professional Plus?
Office 2021 Professional Plus is the full suite of Microsoft productivity applications released in October 2021 for Windows. It includes Word, Excel, PowerPoint, Outlook, OneNote, Teams, Access, Publisher, and Skype for Business — every tool the Professional Plus tier has ever included. Unlike Microsoft 365, it is a one-time purchase: pay once, install once, and use it indefinitely without ever paying again.
Microsoft will continue to provide mainstream support for Office 2021 until October 2026, with extended support (security patches only) continuing until October 2028. That means you have at least two more years of full support and six more years of security updates remaining — a substantial remaining lifespan for software purchased today.
What Features Did Office 2021 Introduce?
Office 2021 was not just a minor refresh — it brought genuine improvements over Office 2019 that matter in daily use.
Co-authoring in Word, Excel, and PowerPoint
Office 2021 added real-time co-authoring to Word, Excel, and PowerPoint when documents are stored on OneDrive or SharePoint. Multiple users can edit the same document simultaneously, with changes appearing in real time. This was one of the biggest gaps between Office 2019 and Microsoft 365 subscriptions, and its inclusion in Office 2021 makes collaboration significantly more practical for teams.
Excel: XLOOKUP, Dynamic Arrays, and LET
Office 2021 brought three groundbreaking Excel functions that Office 2019 lacked entirely. XLOOKUP replaces VLOOKUP and HLOOKUP with a single, far more flexible function that searches both vertically and horizontally, handles errors gracefully, and does not require columns to be sorted. Dynamic arrays allow a single formula to return multiple values that spill into adjacent cells — eliminating the need for Ctrl+Shift+Enter array formulas. The LET function allows you to define named variables within a formula, making complex formulas dramatically easier to read and maintain. These three features alone represent a significant productivity upgrade for anyone who works extensively with data.
New Array Functions: UNIQUE, SORT, SORTBY, FILTER, SEQUENCE, RANDARRAY
Alongside dynamic arrays, Office 2021 introduced six new array functions. UNIQUE returns a list of unique values from a range. SORT and SORTBY sort a range by one or more columns. FILTER extracts rows from a table that meet specified criteria — essentially a formula-based alternative to AutoFilter. SEQUENCE generates a list of sequential numbers. RANDARRAY generates an array of random numbers. These functions replace complex workarounds that previously required manual PivotTables, VBA macros, or external tools.
PowerPoint: Recording Studio and Ink Features
PowerPoint 2021 added a fully redesigned Recording Studio that allows presenters to record narration, webcam video, and on-screen annotations simultaneously — creating polished video presentations suitable for e-learning, webinars, or asynchronous team updates. The ink-to-shape and ink-to-text features were also improved, making stylus input on touchscreen devices far more reliable.
Dark Mode
Office 2021 added a true dark mode that extends across the application canvas — not just the toolbar. For users who spend long hours in front of a screen, this reduces eye strain considerably. Dark mode can be enabled via File > Account > Office Theme > Black.
How Does Office 2021 Compare to Office 2024?
Office 2024 was released in October 2024 and brought additional improvements over 2021, including enhanced Copilot AI integration (via a separate Microsoft 365 Copilot subscription), updated versions of Teams, improvements to Outlook’s interface, and some additional Excel functions. However, the core application feature set — the Word editor, Excel calculation engine, PowerPoint presentation tools, and Outlook email client — is broadly similar between the two versions.
For users who do not need the very latest AI features and are happy with the Office 2021 feature set, upgrading to 2024 offers limited practical benefit. Both Office 2021 Professional Plus and Office 2024 Professional Plus are available from GetRenewedTech at the same price of £29.99 — so the decision is genuinely about which feature set you need rather than which is better value.
How Does Office 2021 Compare to Microsoft 365?
This is the comparison that comes up most often. Microsoft 365 Personal costs around £59.99 per year; Microsoft 365 Family runs to around £79.99 per year. Office 2021 Professional Plus costs £29.99 as a one-time purchase. In straightforward financial terms, Office 2021 pays for itself in under six months compared to a Microsoft 365 Personal subscription.
The features you lose with Office 2021 versus Microsoft 365 are: access to the very latest feature updates as they are released, 1 TB of OneDrive cloud storage, the advanced AI tools bundled into Microsoft 365 Copilot, and the ability to install Office on multiple devices (Microsoft 365 allows up to five devices). If you need any of these things, Microsoft 365 is the right choice. If you do not, Office 2021 offers everything you need at a fraction of the ongoing cost.
Who Is Office 2021 Professional Plus Best For?
Small Businesses and Self-Employed Professionals
For a sole trader or small business that uses Office primarily for creating documents, tracking finances in Excel, and managing email in Outlook, Office 2021 Professional Plus provides the complete feature set without subscription overhead. The cost difference between a perpetual licence and a year of Microsoft 365 becomes meaningful when multiplied across a team of five or ten people.
Students
Students on tight budgets benefit significantly from the one-time purchase model. Rather than committing to a recurring subscription that may lapse at inconvenient times, a perpetual Office 2021 licence remains usable throughout a degree programme and beyond.
Home Users
For home users who write documents, manage household budgets in Excel, and handle personal email, Office 2021 Professional Plus covers all needs. The Access database and Publisher desktop publishing applications are also included — features that are available only in specific Microsoft 365 tiers.
Businesses in Regulated Industries
Some regulated industries — financial services, healthcare, legal — prefer perpetual software licences because they allow complete version control. A perpetual Office 2021 installation can be maintained at a specific patch level indefinitely, whereas Microsoft 365 updates automatically. This predictability is valuable in environments where software changes must be validated before deployment.
Is Office 2021 Suitable for Use in 2026?
Absolutely. Office 2021’s feature set is modern, capable, and covers virtually every productivity task a business or home user encounters. Its support timeline extends to 2028, its file formats are fully compatible with every other version of Office and the vast majority of third-party applications, and its performance is excellent on current hardware.
The narrative that older software versions are somehow inadequate is often driven by subscription-model marketing rather than genuine user need. For the overwhelming majority of users, Office 2021 is not just adequate — it is excellent.
Where to Buy Office 2021 Professional Plus
Office 2021 Professional Plus for Windows is available from GetRenewedTech for £29.99. This gives you the full suite — Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher, Teams, and Skype for Business — as a one-time purchase. If you are a Mac user, Office 2021 Home and Business for macOS is available at £74.99 and includes Word, Excel, PowerPoint, Outlook, and OneNote.
In 2026, Office 2021 Professional Plus remains one of the best-value productivity software purchases available. If you need a reliable, full-featured Office suite without a monthly bill, it deserves serious consideration.
