What does Microsoft 365 Business Premium include, and does a small business in Northern Ireland need it?

Microsoft 365 Business Premium is everything in Business Standard (the desktop Office apps, business email, Teams and 1 TB of OneDrive storage per person) plus Microsoft's security tools for small businesses: Defender for Business on every device, Intune device management, Entra ID P1 with Conditional Access, Defender for Office 365 Plan 1 for email, and Purview data loss prevention [1][2][3]. It is sold for organisations of up to 300 users [1] and lists at £16.90 per user per month on an annual commitment, ex VAT (checked 3 November 2026) [7]. Most Northern Ireland businesses that hold client data, need Cyber Essentials or have staff working away from the office will need it.

The short version

• Business Basic is web and mobile apps only. Business Standard adds the desktop apps. Business Premium adds the security.
• Premium's extra tools cover all five Cyber Essentials controls, but a licence is not a certificate. The tools have to be switched on and configured.
• If you hold client data, work from laptops and phones outside the office, or need Cyber Essentials for contracts, Premium is usually worth it.
• Copilot is a separate add-on. It is not included in any of the three plans.

What's the difference between Business Basic, Standard and Premium?

All three plans cap out at 300 users; beyond that Microsoft's Enterprise plans take over [1]. The office apps, mailbox and storage are the same in Standard and Premium [2]. The difference is entirely in security and management. The prices are Microsoft's UK list prices on an annual commitment, ex VAT, checked 3 November 2026 [7][8][9]. Paying month to month costs 20% more: £12.96 instead of £10.80 for Standard, and £20.28 instead of £16.90 for Premium [7][8]. Resellers set their own prices, so a quote may differ.

What security do you actually get with Business Premium?

• Defender for Business. Endpoint protection for Windows, Mac, iOS and Android devices, built for small and medium businesses. Microsoft describes it as equivalent to Defender for Endpoint Plan 1 with some Plan 2 features [1].
• Intune Plan 1. Central management of company laptops and phones, including macOS, and app-level protection of company data on personal phones [1].
• Entra ID P1 and Conditional Access. Sign-in rules that go beyond a code on your phone: for example, only allow access from managed devices, or block sign-ins from countries you don't work in [1].
• Defender for Office 365 Plan 1. Checks links when they're clicked (Safe Links), opens attachments in a sandbox first (Safe Attachments), and spots emails impersonating your directors or suppliers [1].
• Purview information protection. Sensitivity labels on email and files, data loss prevention policies that stop sensitive information leaving by email, and message encryption [3].

Does Business Premium cover the five Cyber Essentials controls?

It gives you a tool for each of them. Cyber Essentials checks five technical controls [4], and the current requirements (v3.3, April 2026) add two details that matter here: high-risk and critical updates must be applied within 14 days of release, and sign-in to cloud services must always use multi-factor authentication [5].

The tools only count once they are switched on, configured and covering every device in scope. That's why many firms pair Business Premium with an IT partner who sets it up to the standard. For the certification itself, see Do professional firms need Cyber Essentials? or our Cybersecurity service.

When is Business Premium worth it, and when is Standard enough?

Business Premium usually pays for itself when any of these are true:

• You hold client or patient data, such as a law firm, accountancy practice, clinic or estate agent.
• You need Cyber Essentials for a tender, contract or insurer.
• Staff work from laptops and phones at home, on site or on the road.
• People use personal phones for work email.
• You have nothing else managing your devices or protecting them from malware.

Standard can be enough for a very small team with low-risk data, or where another service already provides device management, endpoint protection and email filtering. Be honest about the comparison: Standard plus a separate antivirus, device manager and email filter often costs as much as Premium and gives you more suppliers to manage. Upgrading from Standard to Premium is a licence change, not a migration. Mailboxes and files stay where they are.

Does Business Premium include Copilot?

No. Copilot is an add-on. Microsoft Copilot Business is the version for organisations with up to 300 users. It can be added to Business Basic, Standard or Premium and is sold on an annual commitment [6]. Copilot Business lists at £16.10 per user per month, ex VAT; Microsoft is offering £13.80 for the first year on annual commitments made between 1 July and 31 December 2026 [9]. If you are planning Copilot, Business Premium's sensitivity labels and data loss prevention help keep it from surfacing files people shouldn't see [3].

What should you ask before buying licences through an IT provider?

• Do you resell the licences, or do we buy them direct from Microsoft? Who owns the account if we leave?
• How does your price compare with Microsoft's list price, and is it on an annual or monthly commitment?
• Is setting up the security tools (Intune, Defender, Conditional Access and data loss prevention) included, or charged separately?
• Is there a charge to migrate email and files, or to upgrade from Standard to Premium?

At BTNI, Business Premium is the licence our Microsoft 365 and security services are built on, configured to the Cyber Essentials controls and kept maintained.