Microsoft 365 Business vs Business Premium: which tier do you need?

The Microsoft 365 Business tier structure

The Business range sits below the Enterprise (E3/E5) tiers and is capped at 300 users. As of early 2026, it comprises three plans.

Microsoft 365 Business Basic (approximately £5.10/user/month) gives you web and mobile versions of the Office apps, Exchange email, SharePoint, OneDrive and Teams. There are no desktop Office applications included. This tier suits businesses with light productivity needs or where most staff work primarily in a browser.

Microsoft 365 Business Standard (approximately £10.30/user/month) adds full desktop versions of Word, Excel, PowerPoint, Outlook and the rest of the Office suite, along with Teams webinars and the full SharePoint feature set. This is the most common plan for SMEs that need the full productivity stack.

Microsoft 365 Business Premium (approximately £18.20/user/month) includes everything in Standard and adds a material set of security and device management capabilities. The price delta over Standard is around £7–8 per user per month. That's where the conversation gets interesting.

The jump from Basic to Standard is primarily about productivity – desktop apps, more storage, fuller feature sets. The jump from Standard to Premium is a different kind of decision. You're not getting better productivity tools; you're getting a security stack built on top of the existing productivity platform.

What Business Premium actually adds

The security capabilities bundled into Business Premium are tools that would otherwise require separate licensing and vendor management. They address endpoint protection, device management and identity security – three distinct problem areas that are often handled piecemeal by SMEs, if at all.

Microsoft Defender for Business is an endpoint detection and response (EDR) platform. It provides antivirus and anti-malware protection, threat detection across devices, vulnerability management and automated investigation and remediation. For most SMEs, it replaces a third-party endpoint protection product – or fills a gap where nothing was in place.

Microsoft Intune is Microsoft's mobile device management (MDM) and mobile application management (MAM) platform. It lets you enforce device compliance policies, push configuration to managed devices, remotely wipe a device that's been lost or compromised and control which applications can access company data. Intune is the tool that makes "we have a device management policy" mean something in practice rather than on paper.

Microsoft Entra ID Plan 1 (previously Azure AD P1) adds Conditional Access policies and MFA enforcement at the identity layer. Conditional Access lets you define rules about when and how users can sign in – for example, blocking sign-in from outside approved countries, requiring a compliant device, or requiring MFA for every sign-in regardless of location. Without Entra ID P1, your MFA options are limited to basic per-user MFA, which is harder to enforce consistently.

Azure Information Protection Plan 1 provides sensitivity labels – the ability to classify and protect documents and emails according to how sensitive they are. Labels can restrict forwarding, prevent copying, apply watermarks and control who outside the organisation can open a file.

Taken individually, each of these tools addresses a specific security control. Together, they form a coherent security baseline that would cost significantly more to assemble from separate vendors.

The cyber insurance angle

Cyber insurance renewal questionnaires have become materially more demanding over the past two years. Insurers have watched claims rise and have responded by tightening the controls they require as a condition of coverage – or as a condition of a reasonable premium.

Four questions appear consistently on renewal forms. Does the organisation enforce MFA for all users? Is endpoint protection deployed across all devices? Is there a documented and enforced device management policy? Is there a capability to remotely wipe lost or stolen devices?

Business Premium provides the tooling for all four. Entra ID P1 enforces MFA via Conditional Access policies rather than relying on individual users opting in. Defender for Business covers endpoint protection. Intune is the device management policy and also provides remote wipe. Business Standard provides none of these natively.

This matters beyond the questionnaire itself. If a claim is made and it emerges that the controls you indicated were in place weren't actually configured – or existed in name only without the tooling to enforce them – you have a coverage problem. Business Premium doesn't complete your security programme, but it provides the tooling that makes the controls real rather than aspirational.

Cyber Essentials and Business Premium

The UK government's Cyber Essentials scheme requires organisations to demonstrate five controls: boundary firewalls, secure configuration, access control, malware protection and patch management. The Danzell update taking effect in April 2026 tightens the requirements around device management and MFA – making the controls in Business Premium more directly relevant to certification.

Intune simplifies Cyber Essentials evidence in two ways. First, device compliance policies in Intune create an auditable record of the configuration state of managed devices. Second, Intune's automated patch management capability directly addresses the patch management control. Rather than relying on user behaviour or manual processes, you have a managed, documented system.

Entra ID Plan 1's Conditional Access policies address the access control requirement at the identity layer. You can enforce MFA for every sign-in, block access from non-compliant devices and document the policies in place. That's considerably more defensible than per-user MFA that some staff have enabled and others haven't.

If Cyber Essentials certification is on your roadmap – whether because you're pursuing it independently or because a contract requires it – Business Premium significantly reduces the effort involved in meeting and evidencing the controls. We've written separately about the April 2026 Cyber Essentials changes and what they mean in practice.

Who typically needs Premium vs Standard

Business Standard is sufficient in a limited set of circumstances. Very small teams with minimal external exposure, businesses that already have separate endpoint protection and MDM tooling in place, or organisations where the IT environment is simple enough that the security controls in Premium would be redundant with what's already deployed. If you have a dedicated security stack that covers endpoint protection, device management and identity – and you're paying for it – Business Premium may not add proportionate value.

Business Premium makes commercial sense in a broader set of situations.

• You have cyber insurance or a renewal coming up and the questionnaire asks about MFA enforcement, endpoint protection and device management.
• You're pursuing Cyber Essentials certification – or a contract requires it.
• You operate in a regulated sector where data protection obligations require demonstrable controls around access and device management.
• Your staff include remote workers who access company data from personal or unmanaged devices.
• You've had a security incident or near-miss and want to establish a documented, enforced baseline rather than relying on user behaviour.
• You're consolidating vendors and want endpoint protection, MDM and identity security under a single Microsoft licence rather than managing separate products.

The £7–8 per user per month delta is meaningful at scale but modest relative to the alternative – buying Defender, Intune and Entra ID P1 as standalone add-ons, or sourcing equivalent capability from third-party vendors. For most SMEs that don't already have a mature security stack, Premium is the more cost-effective path.

Licensing and migration considerations

Moving from Business Standard to Business Premium is non-destructive. Existing mailboxes, SharePoint content, Teams data and OneDrive files are unaffected. The transition itself is administrative – licence reassignment in the Microsoft 365 admin centre – rather than a migration in the technical sense.

The work is in configuring the tools that Premium unlocks. Intune requires planning: device enrolment, compliance policy definition, application management configuration. Entra ID Conditional Access policies require careful sequencing – misconfigured policies can lock users out, and they need to be rolled out in report-only mode before enforcement. These aren't insurmountable tasks, but they're not zero-effort either.

Before upgrading licences, it's worth auditing what you actually have. Ghost licences – seats assigned to former staff, shared mailboxes, test accounts – can represent meaningful spend at the Premium price point. Reducing the licence count before upgrading the remaining seats is straightforward and reduces the cost of the upgrade.

The sequencing that works for most SMEs: audit current licences and remove unused seats, upgrade the remaining users to Premium, then configure Intune and Conditional Access in a controlled rollout rather than all at once.