How to Reduce Your Microsoft 365 Costs Without Losing Features

Microsoft 365 licensing is one of those line items that grows quietly. You add a user here, upgrade a plan there, forget to remove a license when someone leaves, and a year later you are spending significantly more than you need to. The good news is that most businesses can reduce their M365 costs without cutting features that anyone actually uses. The savings come from matching licenses to roles, cleaning up waste, and understanding the billing options Microsoft offers.

This guide covers the specific changes that save money, in order of how much they typically save.

Audit unused licenses

This is the single highest-impact cost reduction for most businesses, and it takes 15 minutes.

Go to the admin center at admin.microsoft.com, then Billing > Licenses. This shows every plan you own, how many licenses are purchased, and how many are assigned.

If you own 50 Business Premium licenses and only 43 are assigned, you are paying for 7 empty seats. At $22/month per seat, that is $154/month or $1,848/year wasted.

Common causes of unused licenses:

• Former employees whose licenses were never removed. The account was blocked during offboarding but the license was not removed. The mailbox was converted to a shared mailbox (which does not need a license), but nobody unassigned the plan.
• Licenses purchased for a project that ended. A seasonal hire needed access for three months. The project ended six months ago. The license is still being paid for.
• Over-purchasing during initial setup. When the tenant was set up, someone bought 50 licenses anticipating growth. The company has 40 employees. Ten licenses sit unused.

Fix: Reduce your license count to match your actual headcount plus a small buffer (one or two spare licenses for quick onboarding). In the admin center, go to Billing > Your products, select the plan, and click Remove licenses. The change takes effect on your next billing cycle.

Right-size plans per user role

Not everyone needs the same plan. This is the second-largest source of savings, and the one most businesses get wrong because it is easier to put everyone on the same tier than to think about who needs what.

The three business plans have very different price points:

Plan	Price	Key difference
Business Basic	$6/user/month	Web and mobile apps only, no desktop Office
Business Standard	$12.50/user/month	Desktop Office apps included
Business Premium	$22/user/month	Desktop apps + full security stack

You can assign different plans to different users in the same tenant. A 40-person company does not need 40 Premium licenses. A realistic breakdown might look like:

• 20 users on Premium ($440/month) – executives, finance, HR, IT, anyone handling sensitive data or needing full security features
• 15 users on Standard ($187.50/month) – staff who need desktop Office apps but have lower security exposure
• 5 users on Basic ($30/month) – front-line workers, warehouse staff, part-time employees who only use email and Teams

Total: $657.50/month

Compare that to everyone on Premium: $880/month. That is $222.50/month or $2,670/year saved without removing any features from users who actually need them.

For a detailed breakdown of what each plan includes and who it is designed for, see our Microsoft 365 licensing guide.

How to identify who can downgrade

Go to Reports > Usage in the admin center. This shows which Microsoft 365 services each user actually uses. Look for:

• Users on Premium or Standard who never open desktop Office apps. They only use Outlook on the web, Teams, and OneDrive through the browser. They can move to Basic without noticing any difference.
• Users on Premium who do not use Intune, Defender, or conditional access. If their devices are not enrolled in Intune and they are not in any conditional access policies beyond security defaults, they may not need Premium. But verify with your IT team or provider first, because some Premium features protect users invisibly (like Defender for Office 365 scanning their email).
• Users on Standard or Premium who rarely log in. Seasonal workers, contractors with limited involvement, or employees who only check email a few times per week.

Convert departed employee mailboxes to shared mailboxes

When an employee leaves, their mailbox should be converted to a shared mailbox as part of the offboarding process. A shared mailbox does not require a license as long as it stays under 50 GB.

If you have departed employees whose accounts are blocked but still have licenses assigned, you are paying $6 to $22/month for each one for no reason. Convert the mailbox to shared, remove the license, and the mailbox remains accessible to anyone you grant permissions.

Check your user list for blocked accounts that still have licenses:

1. Go to Users > Active users
2. Filter by Sign-in status: Sign-in blocked
3. Check each blocked account for an assigned license

Every blocked account with a license is a candidate for shared mailbox conversion and license removal.

Switch from monthly to annual billing

Microsoft charges approximately 20% more for month-to-month billing compared to an annual commitment. The exact difference depends on the plan, but it is significant:

Plan	Monthly billing	Annual billing	Monthly savings
Business Basic	$7.20/user/month	$6.00/user/month	$1.20/user
Business Standard	$15.00/user/month	$12.50/user/month	$2.50/user
Business Premium	$26.40/user/month	$22.00/user/month	$4.40/user

For a 40-person company on Business Premium, switching from monthly to annual billing saves $176/month or $2,112/year.

The trade-off is that annual licenses are committed for the year. If you reduce headcount mid-year, you cannot cancel the excess licenses until renewal. For businesses with stable headcount, annual billing is almost always the better choice. For businesses with frequent hiring and turnover, the flexibility of monthly billing may justify the premium.

A hybrid approach works: put your stable, long-term employees on annual billing and keep a few monthly licenses for temporary or seasonal needs.

Use archive mailboxes instead of upgrading storage

When a user’s 50 GB mailbox fills up, the instinct is to upgrade their license to get more storage. Before doing that, enable the In-Place Archive mailbox, which is included in Business Basic, Standard, and Premium at no additional cost.

The archive mailbox provides an additional 50 GB (auto-expanding to 1.5 TB on E3/E5 and some Business plans) for older email. Users can access it in Outlook alongside their primary mailbox. You can also set up retention policies to automatically move email older than a certain date to the archive, keeping the primary mailbox under the 50 GB limit without the user doing anything.

This avoids the need to upgrade from a lower plan just for storage, which can save $6.50 to $16/user/month.

Eliminate redundant add-ons

If you are on Business Premium, check whether you are also paying for standalone add-ons that are already included:

• Defender for Office 365 Plan 1 – included in Premium. If you purchased it separately for $2/user/month before upgrading to Premium, cancel the standalone subscription.
• Azure AD Premium P1 – included in Premium. If it is also listed as a separate line item, it is a duplicate.
• Intune – included in Premium. Standalone Intune is $8/user/month. If you upgraded to Premium after buying Intune separately, cancel the standalone.

Go to Billing > Your products and review every active subscription. If you see both a Business Premium subscription and standalone security add-ons, you are likely double-paying.

Microsoft nonprofit and education pricing

If your organization qualifies as a nonprofit, Microsoft offers significant discounts and some free licenses:

• Microsoft 365 Business Basic – free for up to 300 users for qualified nonprofits
• Microsoft 365 Business Premium – $5.50/user/month (75% discount) for qualified nonprofits

Qualification requires registering through Microsoft’s nonprofit portal and meeting their eligibility criteria. If your organization is a 501(c)(3) in the US or equivalent in other countries, check whether you qualify before paying full price.

Education institutions have similar programs through Microsoft 365 Education, with free tiers for students and staff.

Consolidate Microsoft 365 tenants

Some businesses end up with multiple Microsoft 365 tenants, often because different departments or offices signed up independently. Each tenant requires its own set of licenses. Consolidating into a single tenant eliminates duplicate licensing and simplifies administration.

Tenant consolidation is a project, not a quick setting change. It involves migrating mailboxes, files, and Teams between tenants. But the long-term savings from eliminating duplicate licenses and the operational simplification of managing one tenant instead of two or three can be substantial.

Review third-party tools that duplicate M365 features

Businesses sometimes pay for third-party tools that overlap with features already included in their Microsoft 365 plan:

• Zoom when Teams is included in every M365 plan (video meetings, screen sharing, recording)
• Dropbox or Google Drive when OneDrive and SharePoint are included (1 TB per user)
• Slack when Teams is included (chat, channels, file sharing)
• Third-party email filtering when Defender for Office 365 is included in Premium

This is not to say Microsoft’s tools are always better than the alternatives. But if you are paying for both, evaluate whether the third-party tool provides enough additional value to justify the cost on top of what you already have. If you are paying for Google Workspace alongside Microsoft 365, you may be running two platforms that overlap almost entirely – our Microsoft 365 vs Google Workspace comparison breaks down where each platform is stronger so you can decide which to consolidate on.

Negotiate at renewal

Microsoft 365 pricing is not always fixed. Through Microsoft partners and resellers, businesses can sometimes negotiate volume discounts, especially at annual renewal for tenants with 50+ users. If you purchase licenses through a Microsoft Cloud Solution Provider (CSP) partner rather than directly from Microsoft, the partner may offer discounted rates, bundled services, or flexible billing terms that are not available on the direct Microsoft portal.

At renewal, review whether your plan mix is still optimal. A year of usage data tells you more about what each user needs than any initial assessment. Users who were provisioned with Premium “just in case” but never triggered any Premium-specific features are candidates for downgrading.

Also check whether Microsoft has changed pricing or introduced new plans since your last renewal. Microsoft adjusts prices and bundles periodically, and a plan that did not exist when you set up may now be a better fit.

Build a recurring audit schedule

Cost optimization is not a one-time project. Licenses accumulate, roles change, and billing creeps up. Build a quarterly review into your calendar:

1. Check Billing > Licenses for unused seats
2. Check Users > Active users for blocked accounts with licenses
3. Check Reports > Usage for users whose actual usage does not match their plan tier
4. Check Billing > Your products for redundant subscriptions
5. Review any recent departures to confirm offboarding included license removal

A 15-minute quarterly audit consistently identifies savings. For most SMBs, the first audit catches the biggest waste, and subsequent audits catch the drift that accumulates over time.

How Sequentur handles cost optimization

License optimization is part of our managed Microsoft 365 services. During onboarding, we audit every license assignment in the tenant and recommend right-sizing based on each user’s actual role and usage. We identify unused licenses, redundant add-ons, and users on the wrong plan tier.

After onboarding, license reviews are part of our ongoing management. When employees leave, license removal is built into the offboarding workflow. When new employees join, they get the right license for their role from day one. Quarterly audits catch anything that drifted.

For most clients, the license savings identified during onboarding offset a meaningful portion of the management service cost. You end up with better security (because users who need Premium have it), lower costs (because users who do not need Premium are on the right plan), and no more unused licenses accumulating month after month.

If you suspect your tenant has licensing waste and want to know how much you could save, reach out through our contact page. We can run a license audit and show you the numbers.