Licensing & Comparison Guide
Microsoft 365 Business Premium vs E3: Which Should You Choose?
Both plans add security and device management on top of core Microsoft 365 — but they're built for different organization sizes and compliance needs. Here's how to tell which one actually fits.
Business Premium
Best for: Organizations under 300 users that need device management and endpoint security without enterprise-level compliance tooling.
Microsoft 365 E3
Best for: Organizations over 300 users, or those needing advanced eDiscovery, retention, and information governance.
| Situation | Recommended Plan |
|---|---|
| Under 300 users, standard security needs | Business Premium |
| Over 300 users | E3 (no user cap) |
| Need advanced eDiscovery / legal hold | E3 |
| Need Windows Enterprise licensing | E3 |
Rua Technologies Recommendation
Most organizations under 300 users get everything they need from Business Premium at a lower cost. Move to E3 when you hit the user cap, or when a specific compliance requirement demands the deeper governance tooling E3 includes.
Quick Comparison
| Feature | Business Premium | E3 |
|---|---|---|
| User cap | 300 | None |
| Desktop Office apps | ✔ | ✔ |
| Intune device management | ✔ | ✔ |
| Defender for Business | ✔ | Defender for Office 365 P1 |
| Advanced eDiscovery & retention | — | ✔ |
| Windows Enterprise licensing | — | ✔ |
| Typical cost per user | Lower | Higher |
Why this comparison comes up
Business Premium and E3 both sit above the basic productivity plans, adding real security and management capability. The confusion is that they look similar on paper — both include desktop apps, both add device management — but they're designed for different scale and governance needs.
The decision usually comes down to two questions
- Are you over, or likely to go over, 300 users?
- Do you have a specific compliance requirement for eDiscovery, legal hold, or advanced retention?
If both answers are no
Business Premium almost always wins on cost while covering the same day-to-day security and device management needs.
If either answer is yes
E3 is the plan that actually supports your requirements — Business Premium simply isn't available past 300 users, and its compliance tooling is more limited.
Frequently Asked Questions
Is E3 always better than Business Premium?
No. E3 is only necessary once you're past 300 users or need advanced compliance and eDiscovery that Business Premium doesn't include.
Does Business Premium include device management?
Yes, Business Premium includes Intune device management and Defender for Business endpoint protection.
Can we mix Business Premium and E3 licenses?
Yes, licenses can be assigned per user based on role and compliance needs.
Which is cheaper?
Business Premium is generally the lower-cost option per user; E3 costs more but removes the 300-user cap and adds deeper compliance tooling.
Related Guides
Conclusion
Business Premium and E3 solve overlapping problems at different scale. If you're under 300 users without a specific compliance mandate, Business Premium delivers the same day-to-day security at a lower cost. Once you cross that line — in headcount or in governance requirements — E3 is the plan actually built for it.
Rua Technologies can review your user count and compliance needs and tell you plainly which plan fits, rather than defaulting to the more expensive option.
