Microsoft 365 Business Plans Compared

Which Microsoft 365 Business plan do I actually need?

For most small businesses it comes down to three: Business Basic if you work almost entirely in a web browser, Business Standard if your team needs the installed Office apps, and Business Premium if you need proper security and device control on top. That is the honest short answer — the rest of this guide is the nuance that tells you which of the three is genuinely right for you.

All three plans share the same foundations: business email on your own domain, Teams, SharePoint and OneDrive, and a generous mailbox and storage allowance per user. What separates them is whether you get the desktop apps and how much security and management sits underneath. Get those two questions straight and the decision usually makes itself.

Business Basic — the web-first plan

Basic gives you hosted email, the online versions of Word, Excel, Outlook and PowerPoint, plus Teams, OneDrive and SharePoint. Everything runs in the browser. There are no installed desktop apps.

It suits a business whose people live in email and light documents, work mostly from one or two devices, and rarely need the heavyweight features of desktop Excel. It is also a sensible fit for frontline or shared-role staff who mainly need a mailbox and a calendar. If your team has ever complained that the online version of Excel “won’t do the thing they need”, though, Basic is probably a floor short — and that is the most common reason people outgrow it.

Business Standard — the everyday choice

Standard is Basic plus the fully installed desktop apps on up to five devices per person, along with a few extras such as webinar tools. For the majority of office-based teams this is the default, and for good reason: people want real Outlook, real Excel and the ability to work offline on a train or a bad connection.

The step up from Basic to Standard is modest per user, and it removes a whole category of daily friction. If your staff spend their day in documents and spreadsheets, this is usually the plan that pays for itself in productivity. When we handle a Microsoft 365 setup for a typical office, Standard is where most seats land.

Business Premium — Standard plus real security

Premium includes everything in Standard and adds the security and device-management layer: attachment scanning and impersonation protection on top of the link checking Basic and Standard now get, threat protection on the laptops themselves, the ability to enforce policies across laptops and phones, conditional access rules, and tools to protect and, if needed, remotely wipe company data from a lost device.

This is the plan for businesses that handle sensitive or regulated data, have staff using their own devices, or simply want to know that security is being managed rather than hoped for. Law firms, accountants and healthcare practices tend to belong here. The extra cost is real, but so is what it buys — this is the difference between having security features available and having them actively enforced. If you want to understand how that management layer fits your wider systems, our Microsoft 365 and cloud work covers exactly that.

If Standard or Premium is the only question left, our head-to-head of Standard and Premium takes each Premium extra in turn and sets out when it pays for itself.

The caveats worth knowing before you buy

A few things trip people up, so it is worth being clear about them.

The desktop apps are the real dividing line. Ninety per cent of the Basic-versus-Standard decision is simply whether your people need installed Office. If they do, Standard. If they genuinely never leave the browser, Basic. Do not overthink it.

Security is not all-or-nothing. Basic and Standard are not “insecure”. They include multi-factor authentication and spam and malware filtering as standard. Since mid-2026 they also check a link against Microsoft’s list of known bad sites when someone clicks it, which used to be a Premium-only feature. For a small low-risk team that can be enough. Premium is about control and enforcement — managing devices, locking down access, and proving your protections are switched on. That distinction matters more than the marketing suggests.

You can mix and match. You are not forced to put everyone on the same plan. A common, sensible pattern is Premium for the handful of people who touch sensitive data and Standard or Basic for everyone else. This keeps your costs honest and your risk covered where it counts.

There is a user limit. These Business plans are designed for up to 300 users. That covers almost every small and mid-sized business, but if you are heading past that number the conversation moves to the Enterprise plans, which is a different guide entirely.

Moving between plans is painless. Because a plan is just a licence attached to a person, upgrading or downgrading does not touch anyone’s email or files. That is genuinely freeing: you can start where you are today and move up the moment a real reason appears, rather than paying for capability you might need one day.

There is a fourth plan, and it has no email. Microsoft 365 Apps for business gives you the desktop Office apps and OneDrive, but no mailbox, Teams or SharePoint. It suits a business whose email is deliberately hosted elsewhere, and it catches out anyone who assumes email is included. It is also the exception to the point above: moving someone onto it from a plan with a mailbox means backing up their mail first. Our Apps for business vs Business Standard guide explains who it suits and how to move up.

Copilot now comes bundled into two of the plans. From July 2026 you can buy Business Standard or Business Premium “with Copilot”: one licence that includes the paid Copilot features inside the Office apps. Copilot Chat is already part of Basic, Standard and Premium at no extra cost, so treat the bundles as a separate decision about AI rather than another tier to weigh here.

So how do you choose?

Ask three questions. Do my people need installed Office, or will the web apps do? Do we handle sensitive data or manage our own devices, where enforced security earns its keep? And does everyone need the same thing, or should I mix plans by role? Answer those honestly and one of the three plans will stand out.

If you would rather not weigh licences on your own, we are happy to look at how your team actually works and recommend the right mix — including getting your business email onto your own domain and set up properly from day one. No overselling, no licences you will never use. Just the plan that fits, explained in plain English, so you know exactly what you are paying for and why.