Microsoft 365 license types explained simply is this: there are a few main families of plan, a long tail of add ons, and a strong commercial pull from Microsoft toward the most expensive editions. The skill in buying well is not knowing every plan, it is matching each group of users to the cheapest plan that covers what they actually do. Get that match right and Microsoft 365, usually the largest single line in the software budget, becomes far cheaper without anyone losing a capability they use.
As an independent, buyer side advisor with no Microsoft relationship and no reseller margin, we have no reason to push you up the plan ladder. This guide explains the main license families, where they overlap, and the right sizing decisions that cut the bill. Microsoft 365 is the centre of most digital workplaces, which is why it sits at the heart of any digital workplace cost optimization programme.
Microsoft 365 license types explained: the main plan families
Most organisations only need to understand four groups of plan. The enterprise plans, the business plans, the frontline plans, and the standalone and add on licences that sit alongside them.
Enterprise plans: E3 and E5
The enterprise plans are built for larger organisations and carry the fullest feature sets. E3 covers the core Office applications, Exchange, SharePoint, Teams, and a solid baseline of security and compliance. E5 adds advanced security, advanced compliance, telephony, and analytics on top. As of June 2026, Microsoft lists Microsoft 365 E3 at 36.00 US dollars per user per month and E5 at 57.00 US dollars per user per month on an annual commitment (source: Microsoft 365 enterprise plans pricing page, microsoft.com, as of June 2026). That gap of 21 dollars per user per month is the single most consequential licensing decision most firms make.
The trap is buying E5 across the board for features only a subset of users need. We cover the calculation in detail in our guide on when E5 is worth it and when it is not. The short version is that E5 pays off for users who genuinely use its advanced security or telephony, and wastes money everywhere else.
Business plans
The business plans, including Business Basic, Business Standard, and Business Premium, are designed for smaller organisations and are capped at 300 seats. They deliver much of the same core functionality as the enterprise plans at a lower price. Business Premium in particular bundles strong security at a fraction of the E5 cost, which makes it attractive for firms under the seat cap. Above 300 seats you move to the enterprise family.
Frontline plans: F1 and F3
The frontline plans, F1 and F3, are built for staff who do not work at a desk all day: shop floor, warehouse, clinical, and field workers. They are dramatically cheaper than the enterprise plans because they strip back the desktop applications and some services. For an organisation with a large deskless workforce, moving those users off full enterprise licences onto frontline plans is one of the biggest right sizing wins available, and it is frequently missed.
Standalone and add on licences
Around the main plans sits a long list of add ons: extra security, compliance, telephony, Power Platform capacity, and more. These are where spend quietly accumulates, because they get added for a project and never removed. Our guide on Microsoft 365 add ons you may not need works through the ones most often bought and least often used.
How the plans overlap and where money leaks
The plans are deliberately overlapping, and that overlap is where overspend hides. A common pattern is buying E5 for its security features while also running standalone third party security tools that do the same job. Another is licensing every user at E3 when a large share are frontline staff who would be fully served by F3. A third is buying add ons that duplicate capability already inside the base plan. The security overlap is common enough that we cover it on its own in Microsoft 365 security add on overlap.
| Plan | Built for | List price per user per month |
|---|---|---|
| Microsoft 365 E3 | Enterprise knowledge workers | 36.00 US dollars |
| Microsoft 365 E5 | Users needing advanced security and telephony | 57.00 US dollars |
| Microsoft 365 F3 | Frontline and deskless staff | 8.00 US dollars |
Prices are Microsoft list prices on an annual commitment from the Microsoft 365 plans pages at microsoft.com, as of June 2026. Negotiated and volume prices vary, and Microsoft revises this pricing regularly, so always confirm against a current quote.
The right sizing decision
The practical move is to segment your users and match each segment to the cheapest plan that covers its real needs. Knowledge workers who do not use advanced security sit on E3. The subset that genuinely needs advanced security or telephony goes to E5. Frontline staff go to F3. Smaller firms under the seat cap consider Business Premium. Most organisations that have never done this are paying enterprise prices for users who could sit two tiers down. Mixing plans deliberately, as we cover in mixing Microsoft 365 plans to save money, is entirely permitted and is where the saving lives.
Where to start
Start by pulling your current licence mix and your user roles side by side. Count how many users sit on E5 who never touch its advanced features. Count how many frontline staff hold full enterprise licences. Those two numbers usually point straight at the saving. From there, the work is matching segments to plans and adjusting at renewal. The catalogue is large, but the decisions that matter are few, and getting them right cuts your single biggest software line without taking away a capability anyone actually uses.