Microsoft 365 is usually the single largest line in a digital workplace budget, and E5 is the most expensive way to buy it. To cut Microsoft 365 E5 costs you have to separate the users who genuinely use the E5 capabilities, advanced security, compliance, voice, and analytics, from the much larger group who were placed on E5 for convenience and never touch the premium features. That second group is where the savings live.
Where Microsoft 365 E5 overspend hides
Across our engagements the same patterns repeat. Over licensing onto E5 where E3 plus a targeted add on would do. Inactive and departed users still consuming full seats. Duplicate capability you already pay for elsewhere, for example a separate telephony or security tool that E5 already covers, or the reverse. And add ons stacked on top of E5 that overlap with what E5 already includes.
The E3 versus E5 question
The core move is matching the tier to the role. Many organizations can move a large share of users to E3, then license only the people who need advanced security and compliance with E5 or with standalone add ons. Microsoft positions E5 as a bundle, and the list price difference between E3 and E5 is significant per user per month (Microsoft 365 enterprise plan pricing, as of June 2026; confirm current figures on Microsoft's official pricing page as plans change often). Multiply even a modest tier correction across hundreds of seats and the annual saving is material.
Inactive seats and shelfware
Every leaver, every role change, and every project that wrapped can leave an E5 seat live. A disciplined reclamation pass, which we cover in depth on our license right sizing guide, routinely recovers seats that no one had flagged.
How we cut Microsoft 365 E5 costs
The approach is methodical and buyer side. We pull actual usage data, map it to roles, and model the right tier mix. We separate true E5 needs from convenience licensing. We check your buying route, Enterprise Agreement, CSP, or the Microsoft Customer Agreement, for true up and true forward mechanics that may be working against you. Then we build the business case and, where a renewal is near, fold it into the negotiation.
This work sits inside our Microsoft 365 optimization service, and it feeds the wider digital workplace cost optimization engagement, because Microsoft is rarely the only place you overspend. A single vendor search like this one almost always uncovers savings across the rest of the stack too.
What you can expect
Most organizations that have never run a structured E5 review find a meaningful share of seats on the wrong tier or sitting idle. We quantify it before you commit to anything, so the decision is grounded in your own data rather than a vendor's pitch. You keep the E5 capability where it earns its cost and stop paying for it where it does not.