Microsoft 365 Business Standard and Microsoft 365 Business Premium give you the same Office apps, the same email, the same Teams and the same terabyte of storage per person. On Microsoft’s UK price list in October 2026 the plans with Teams sit at £10.80 and £16.90 per user per month on an annual term, before VAT. So the question is what £6.10 a month buys. The answer is four things, all of them security: control over who can sign in and from where, management of the devices doing the signing in, protection on those devices and in the mailbox, and a way to stop sensitive data leaving. None of it changes how Word works. Instead, it decides what happens on the day something goes wrong.
That makes Business Standard vs Business Premium a security decision dressed up as a licensing one. It is why the answer differs from one business to the next.
What Business Standard and Business Premium share
The productivity half is identical, and Microsoft’s Business Standard page lists it: desktop, web and mobile Office apps, business email, Teams, SharePoint and OneDrive, and a cap of 300 users on either plan. Both include multi-factor authentication, spam filtering and basic malware protection. Both show you a Microsoft Secure Score in the Microsoft Defender portal. A business that only ever asks whether staff can write documents and send email will never notice the difference. A licence audit starts by pulling the licence report and matching each person to the plan they need.
The four things Business Premium adds
Microsoft’s own Business Premium page names the extra products. Microsoft’s documentation adds the detail that the identity half is Entra ID P1, which is where conditional access lives. Translated into what they do:
| What Premium adds | What it does in plain terms | The question it answers |
| Policy-based identity (Entra ID P1, which brings conditional access) | Rules about who can sign in, from which countries, on which devices, into which apps | Can a stolen password be used from a laptop we have never seen? |
| Intune Plan 1 | Enrols laptops and phones, pushes settings and updates, and records whether each device is up to date so conditional access can check it before letting it in | Do we know which devices hold our data, and can we keep an out-of-date one out? |
| Defender for Business and Defender for Office 365 | Endpoint detection and response on devices; attachments opened in a sandbox, link policies and impersonation rules in the mailbox | Will we see an attack that gets past antivirus, and is a booby-trapped attachment caught before anyone opens it? |
| Purview Information Protection and Data Loss Prevention | Labels on sensitive documents, and rules that stop them being emailed outside | Can a spreadsheet of client details leave the business by accident? |
Standard answers none of those four questions in full. It has core identity management, which means MFA through security defaults and no conditional access. It has basic mobile device management, enough to set a password policy and wipe a phone, but not Intune and nothing that covers Windows laptops. Its mail protection is the baseline every plan gets, which since July 2026 includes a basic check on links at the moment they are clicked. However, it has no attachment sandbox, no impersonation rules and no detection and response on the device. Moreover, it has no data loss rules. A firm on Standard that wants any one of the four buys it separately or goes without.
When Business Standard is the right plan
It is the right plan for some businesses, and here is which. Standard does the job, and the £6.10 is better spent elsewhere, when all four of these hold:
- every device is owned by the business and is already managed and protected by another product, so that the basic mobile controls Standard includes are enough
- nobody works from a personal laptop
- the data you hold carries no contractual or regulatory obligation that a labelling and loss-prevention tool would help you meet
- no insurer, customer or certification is asking questions about device management
Those conditions tend to stop being true one at a time. These questions often come up at key moments. A member of staff adds work email to a personal phone. A client sends a security questionnaire. An insurer asks whether the business manages its devices before renewing the policy. Consequently, each one is a question Standard cannot answer, and each needs its own product and its own bill to answer it.
Premium is a licence for work you then have to do
Buying Premium switches very little on by itself. Defender for Office 365’s built-in protection applies to mail from the start, but conditional access has no policies until somebody writes them. Intune manages no devices until they are enrolled. In addition, enrolling a small business’s devices in Intune is a project with a start and an end, and needs planning like one. Defender for Business needs onboarding on each machine. Data loss rules need somebody to decide what counts as sensitive.
This is the part of the comparison that the price tables leave out. It is the reason a Premium tenant can be no safer than a Standard one long after the upgrade. The honest reckoning is £6.10 a user a month plus the time to configure what it unlocks, against the cost of buying each capability from a separate vendor and configuring that instead. On that reckoning Premium is likely to come out ahead. However, that is true only for a business that intends to do the work.
Mixed estates, and the audit that finds them
A small business can easily end up on both plans without meaning to be. A few Premium seats bought for the directors during a security scare, the rest on Standard, and a handful of old E3 licences from a previous provider. The security features then apply to some people and not others. This leaves the least-protected account as the way in. A licence audit finds the mix. In addition, where the overpayment sits is covered in that piece.
How to decide
The decision has four parts, and the price is the smallest of them.
- Which controls does the business need, because of how people work, what data it holds and what insurers or customers ask for?
- Which of those does it already have from other products, since a firm with a separate endpoint tool and a separate device manager is not starting from nothing?
- What will it take to configure what Premium adds, given that conditional access, Intune and data loss rules each need design and a rollout?
- Who will manage them afterwards, because a control nobody owns drifts out of date within a year?
Write down the answers to those four questions and the plan will usually become clear. Choose Premium when the business needs controls it does not currently have and someone can manage them. Keep Standard alongside existing tools when they already cover those needs. If nobody currently owns or reviews the controls, start with that conversation first. Buy the plan for the work it lets you do. Then, plan the work. The Unite Group’s Microsoft 365 service covers subscription guidance and the configuration after it. This is where the value of the upgrade is decided.