Pricing. What does Microsoft Defender cost ?
Defender for Business (standalone)
ToolTrim reference price$3/mo
Billed annually · $3/mo billed monthly. Per user.
- Annual subscription (auto-renews), up to 300 users, up to 5 devices per user, no minimum device requirement.
Microsoft 365 Business Premium (bundle)
$22/mo
Billed annually · $22/mo billed monthly. Per user.
- Includes Defender for Business plus the full Microsoft 365 productivity suite.
Official pricingChecked on September 25, 2026
Microsoft Defender's billing traps
Before you pay
The standalone plan is an annual subscription that auto-renews, and server protection is billed as a separate add-on.