Introduction
Business Standard vs Business Premium vs E3 vs E5 (Plain-English SME Guide)
Microsoft 365 licensing is one of those topics that sounds simple on the surface but quickly becomes confusing, especially for 50–150 user businesses where roles differ, security needs vary, and budgets are under scrutiny. This could extend to 20-250 user businesses with many SMEs ending up overpaying, under‑protecting themselves, or stuck with a licensing mix that grew organically without direction.
This guide cuts through the noise and explains, in practical terms, what the main licences offer, how to choose between them, when mixed licensing makes sense, and how to avoid duplicate tools that inflate costs unnecessarily. If you want clarity and control over licensing (and costs), this is for you.
This is a bit of a bullet point heavy article due to use listing off features etc so bear with us throughout.
Quick answer (for UK SMEs with 50–150 users)
Business Standard is fine for organisations with lighter needs, but Business Premium is often the strongest fit for most SMEs because of its security and device management capabilities (it is where we actually think the baseline should be). E3 and E5 come into play when compliance, advanced reporting or enhanced security controls are required. Mixed licensing can work well by role but only when your security baseline doesn’t require uniform controls across all users. Overpaying often comes from duplicate tools, unmanaged licences, or inconsistent plan choices.
Start with what you’re actually buying
When you strip away the Microsoft product names, you’re really buying three things:
- Productivity tools – email, Teams, Office apps, collaboration.
- Security controls – identity management, device protection, email security, access policies.
- Compliance & visibility – monitoring, auditing, data governance, advanced protection.
The mistake most SMEs make is assuming all licences include “security.” They do, but at very different levels and the depth of those controls is often what separates a compromised business from a secure one. The other most common mistake we see is buying a license and assuming you are utilising all its features, they require the correct setup.
Business Standard: who it’s really for
Business Standard gives you the usual collaboration stack including: email, Office applications, Teams, SharePoint, OneDrive but it offers minimal modern security and no meaningful device management.
It works best when:
- Devices are simple and already managed through another toolset.
- The business has low security expectations (rare these days).
- The IT environment is small and tightly controlled.
The risk is that many SMEs stay on Business Standard long after their risk profile or insurer requirements move on. That’s where licensing starts holding the business back.
Business Premium: the “sweet spot” for most SMEs
This is where many 50–150 user organisations land once they want stability, security and proper management. Business Premium includes everything from Standard but adds the security foundation most SMEs now require; identity controls, advanced endpoint protection, centralised device management through Intune, and far stronger email security options.
In practice, Business Premium helps you:
- Enforce MFA in a consistent way
- Control which devices can access company data
- Apply conditional access cleanly
- Deploy modern EDR tools
- Secure email more effectively
- Build a better defence against phishing and account compromise
It’s the licence that makes a modern IT support model possible. It’s also typically the licence insurers expect to see as a baseline for cyber resilience.
Microsoft 365 E3: when complexity increases
Some SMEs start needing E3 when their environment grows more complex or when the business requires additional compliance or management capabilities. E3 includes the core Office apps and some stronger information governance features, but it doesn’t include all the advanced security found in E5.
E3 makes sense when:
- You need more advanced compliance capabilities.
- There’s a need for deeper auditing and data governance.
- You’re working with compliance-driven customers or frameworks.
Most SMEs don’t jump straight to E3 unless there’s a strong external requirement. It’s usually a step up in a roadmap.
Microsoft 365 E5: high assurance, high visibility
E5 is often misunderstood as “too much” for SMEs, but it has a place when risk is genuinely high. It includes the entire E3 feature set and adds advanced security, analytics, and threat protection capabilities — features often required by audits, insurers, or enterprise‑grade security expectations.
E5 becomes relevant when:
- You face strict customer audits or regulated industry pressures.
- You need advanced detection, reporting and threat analytics.
- You want centralised visibility over incidents and risks.
- You need stronger identity and privileged access controls.
Most SMEs don’t need E5 across all users. But selective E5 licensing for high‑risk roles (finance, leadership, privileged users) can be a smart approach under the guidance of your IT lead whether that be internal or external.
Can you mix licences? Yes, if it’s done deliberately
Mixed licensing can work extremely well for SMEs. A typical pattern looks something like this:
- Business Premium for most users
- A handful of E3/E5 licences for compliance-heavy or privileged accounts
- In some scenarios this can vary even further between license types
But here’s the nuance: mixed licensing only works when your security baseline doesn’t require uniform controls. If you need conditional access rules, unified endpoint management, or consistent EDR coverage across all devices, you often need Business Premium (or above) across the board.
Put simply: you can mix licences, but you can’t mix the security baseline.
The duplicate tooling problem (and the easiest savings SMEs can make)
A surprising number of SMEs pay for third‑party security tools that Business Premium or E3/E5 already cover but it’s important to note before thinking there are a load of savings to be had, this is quite often a deliberate approach to double up on some tooling. Where this should be looked at is repeating the phrase, where it is deliberate vs where you have drift or accidental crossover.
Common areas of duplication include:
- Endpoint protection
- Device management tools
- Email security filtering
- Mobile device management
- VPN or legacy access tools that conditional access replaces
In many cases, switching to the right Microsoft licence removes entire tools without reducing protection. This is one of the simplest ways to reclaim budget but not only must you be sure you are replacing like for like, there is often the view that Microsoft only tooling is putting all your eggs in one basket.
Cost modelling without locking yourself in
Licensing is often where hidden overspend creeps in. People leave, roles change, departments scale, and licences accumulate without a refresh. Rather than trying to calculate a perfect annual cost, the best approach is a quarterly licensing review.
Focus on:
- Inactive or unused licences
- Role changes that affect plan fit
- Overlapping security tools
- License split fairness (who actually needs what?)
- Security requirements that might mean upgrading the baseline
It’s not about getting everything perfect, it’s about staying intentional.
Request a Microsoft 365 Licensing & Security Audit
If you’d like to check whether you’re overpaying or under‑protected, we can run a licensing and security review with clear recommendations.
How licensing fits into your wider IT roadmap
Licensing shouldn’t be treated as an isolated decision — it should follow your roadmap.
For example:
- If you’re stabilising and standardising your environment, you’ll likely move away from Standard.
- If you’re tightening security (MFA, conditional access, EDR), Business Premium becomes a natural fit.
- If you’re improving governance, visibility and compliance, selective E3/E5 may become strategic.
- If AI readiness is a priority, you’ll need to address data access, permissions and policy consistency, all of which depend on the licence baseline.
Licensing is simply a foundation for the level of control, security and governance you want to achieve. If you want to read more about creating an IT roadmap, read our article here.
FAQs
Do most SMEs need Business Premium?
In 2026, yes. For the majority of 50–150 user businesses, Business Premium provides the right balance of security, management, and value. We would probably go a step further and say businesses with 10 users plus should be on business premium if it makes sense to.
When should we consider E3 or E5?
Usually when compliance expectations, audits, customer requirements or advanced reporting needs appear. Not all users require these plans, often only a subset do.
Can we mix licences across roles?
Yes, but only if it doesn’t break your security baseline. Premium for most, Standard for some, and E5 for high‑risk users is a common pattern but only when the security baseline isn’t compromised.
How do we avoid overpaying?
Through quarterly reviews, removing inactive licences, eliminating duplicate tools, and right‑sizing plans based on real usage.
Should our IT provider manage our licensing?
By all means they can but you still need visibility. You’re the one accountable for risk, spend and operational fit, this is where account management and regular conversations are important.