Microsoft's small-business licensing is more coherent than it first appears. There are four plans, they are cumulative, and the decision comes down to two questions: do your users need desktop Office applications, and do you need device management and security tooling.
The four plans
| Plan | Desktop Office apps | Security & device management | Best for |
|---|---|---|---|
| Business Basic | Web and mobile only | None | Light users, shared roles |
| Apps for business | Yes | None | Office apps without hosted email |
| Business Standard | Yes | None | Standard knowledge workers |
| Business Premium | Yes | Intune, Entra ID P1, Defender | Any business handling sensitive data |
The 300-seat ceiling
Every Business plan is capped at 300 seats per tenant. You can mix plans beneath that ceiling freely, but you cannot exceed it — growth past 300 means moving to Enterprise plans.
Five mistakes that cost real money
1. Licensing everyone at the same tier
A warehouse supervisor who checks email on a phone and an analyst who lives in Excel do not need the same license. Segment by role. The savings from correct segmentation typically exceed anything you would gain by negotiating.
2. Leaving licenses assigned to departed staff
Offboarding routinely disables the account and stops there, leaving the license assigned and billing. Convert the mailbox to shared — which is free and retains the contents — and release the seat. This alone is often the largest single recovery in a small-business licensing review.
3. Choosing Standard over Premium to save money
The gap between Standard and Premium buys Intune, Entra ID P1, and Defender for Business. Purchased individually, those cost more than the plan difference. Any business with regulatory obligations, client data, or remote staff should be on Premium.
4. Paying monthly out of habit
Monthly billing costs roughly 20 percent more than an annual term. That premium is worth paying for genuinely uncertain headcount and is pure waste for your stable core staff. Most organizations should split: annual for the permanent baseline, monthly for the variable portion.
5. Missing nonprofit eligibility
Registered nonprofits qualify for grant and heavily discounted Microsoft 365 licensing. A meaningful number of eligible organizations pay commercial rates simply because nobody checked.
Add-ons worth understanding
- Exchange Online Archiving — for retention obligations beyond the standard mailbox
- Microsoft 365 Copilot — per-user AI assistance; pilot before broad rollout
- Teams Phone — replaces a traditional phone system, often at lower total cost
- Entra ID P2 — worth applying to administrators even when the estate is on P1
A sensible review cadence
Quarterly, check three things: licenses assigned to people who have left, users on a tier above what their role requires, and subscriptions renewing within the next 90 days. Fifteen minutes, four times a year, keeps a small-business estate from drifting.