Microsoft 365 E3 and E5 are the two main enterprise plans. Both include the core Office apps, Exchange, SharePoint, OneDrive, and Teams. The Microsoft 365 E3 vs E5 cost difference comes entirely from what E5 stacks on top: advanced security, advanced compliance, analytics, and voice. The discipline for a buyer is to pay for that stack only where it is genuinely used.
Microsoft 365 E3 vs E5 cost at list price
The starting point is the published price. The figures below are list prices on an annual commitment and are a baseline for negotiation, not the number a large buyer should expect to pay through an Enterprise Agreement or a CSP.
| Plan | List price per user per month | Annual per user |
|---|---|---|
| Microsoft 365 E3 | About 36.75 US dollars | About 441 US dollars |
| Microsoft 365 E5 | About 57 US dollars | About 684 US dollars |
| Difference | About 20 US dollars | About 243 US dollars |
Source: Microsoft 365 enterprise plan list pricing, annual commitment, per Microsoft as of June 2026. Prices vary by region, agreement type, and negotiation, and change often. Confirm current figures with Microsoft before budgeting.
On a thousand seats, the difference between putting everyone on E3 and everyone on E5 is roughly a quarter of a million US dollars a year at list. That is the size of the prize in getting this decision right, and why it features so heavily in Microsoft 365 optimization work.
What Microsoft 365 E5 adds over E3
E5 is best understood as E3 plus four bundles. Each is a product a company might otherwise buy on its own, so the question for every one is whether you would buy it separately at all.
Advanced security
E5 adds advanced threat protection, identity protection, and endpoint security capability beyond the baseline in E3. For organizations that would otherwise license a separate security suite, this is often where the upgrade earns its keep.
Advanced compliance and information protection
E5 includes advanced data governance, eDiscovery, and information protection controls. These matter most to regulated industries and to organizations with specific legal hold or retention obligations.
Power BI Pro and analytics
E5 bundles Power BI Pro and advanced analytics. For heavy data users this can replace a standalone Power BI Pro license, which has its own per user cost.
Teams Phone and audio conferencing
E5 includes the Teams Phone system and audio conferencing capability. For an organization moving voice onto Teams, this can displace a separate calling plan or even a legacy phone system, which is exactly the overlap explored in our collaboration and video coverage.
When E5 is worth the cost, and when E3 wins
The honest answer is that it depends on the role, not the company. E5 is worth paying for when a user would otherwise need the security, compliance, voice, or analytics it contains, and buying those separately would cost more than the upgrade. It is also justified where regulatory requirements demand its advanced controls. For a user who needs none of that, and many do not, E3 delivers the full productivity experience at two thirds of the price.
The most expensive mistake we see is the blanket upgrade: moving the entire workforce to E5 because a subset of users needs its features. That funds a premium stack for thousands of people who never open it, the same waste pattern described in the true cost of SaaS shelfware. The fix is to right size by role.
How buyers right size between E3 and E5
The practical method is to segment the workforce. Identify the roles that truly need E5 capabilities, such as security and compliance staff, heavy analysts, and anyone whose voice runs on Teams Phone, and place E5 only on them. Keep the majority on E3. Where a single E5 feature is needed by a wider group, a targeted add on layered on E3 is usually cheaper than the full upgrade. This mixed estate is normal and supported, and it is where most of the saving lives.
Because Microsoft 365 is the largest single line in most stacks, this decision also feeds the bundled view of digital workplace cost optimization, where the goal is to stop paying twice for capability already inside the platform you own.
This comparison is commercial and cost advisory, not legal advice. Pricing and packaging change often, so treat every figure as an as of date baseline and confirm current terms with Microsoft and your own counsel before you commit.