Microsoft Defender for Office 365 Pricing Calculator 2026
Estimate your total cost including hidden fees
The Microsoft Defender for Office 365 calculator estimates the cost of your selected plan. Change the team size where pricing is per person, choose an available billing period, and add reported extras that apply to your contract.
Enter your requirements below to see the recurring cost and first-year total. Unverified extras are excluded.
- Plans: 2 tiers; $2–$5/user/month
Reported extras may depend on your usage and contract. Confirm the final quote with Microsoft Defender for Office 365.
Microsoft Defender for Office 365 pricing ranges from $2 to $5 per user/month as of September 2026. Microsoft Defender for Office 365 offers 2 pricing tiers. Confirm any implementation, training and support charges with the vendor; unverified extras are excluded. Pricing verified from 5 sources by CostBench.
Your Estimate
Cost Breakdown
Includes one-time costs (implementation, training)
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Microsoft Defender for Office 365 Pricing by Team Size
Here's what Microsoft Defender for Office 365 costs for different team sizes, based on the Plan 1 plan:
| Team Size | Monthly Cost | Annual Cost |
|---|---|---|
| 5 users | $10/mo | $120/yr |
| 10 users | $20/mo | $240/yr |
| 25 users | $50/mo | $600/yr |
| 50 users | $100/mo | $1,200/yr |
| 100 users | $200/mo | $2,400/yr |
| 250 users | $500/mo | $6,000/yr |
| 500 users | $1,000/mo | $12,000/yr |
Prices based on Microsoft Defender for Office 365 Plan 1 plan at $2/user/month. Verified July 2026.
Real-World Microsoft Defender for Office 365 Cost Examples
Small Business on E3 (50 users)
CustomContact for pricing
Microsoft 365 E3 with Defender for Office 365 Plan 1 provides baseline email security with Safe Attachments, Safe Links, and anti-phishing for Microsoft 365 environments.
Mid-Size Company on E3 with Plan 2 (250 users)
CustomContact for pricing
E3 base with Defender Plan 2 adds Threat Explorer, Automated Investigation and Response, and attack simulation training—ideal for organizations needing advanced threat hunting and automated remediation.
Enterprise on E5 (1,000 users)
CustomContact for pricing
Microsoft 365 E5 includes Defender for Office 365 Plan 2 with no additional cost, plus full compliance, advanced analytics, and Power BI. Most cost-effective for large enterprises needing comprehensive Microsoft security suite.
Compare at This Team Size
Frequently Asked Questions
01 How accurate is this Microsoft Defender for Office 365 pricing calculator?
This calculator uses official Microsoft Defender for Office 365 pricing data verified as of 2026-07-03. Unverified extras are not added to the estimate. Actual costs may vary based on negotiated discounts, specific feature requirements, and implementation complexity.
02 What hidden costs should I include in my Microsoft Defender for Office 365 budget?
Hidden costs vary by vendor and contract. We don't have Microsoft Defender for Office 365-specific cost breakdowns yet — see our Microsoft Defender for Office 365 Hidden Costs page for the latest data we've sourced.
03 Should I choose monthly or annual billing for Microsoft Defender for Office 365?
Compare the published annual total with twelve monthly payments when both are available. An annual commitment may reduce flexibility; confirm cancellation terms and whether the quoted plan fits your needs.
04 How do I know which Microsoft Defender for Office 365 tier I need?
Start with your must-have features. Microsoft Defender for Office 365 offers 2 tiers ranging from $2 to $5/user/month. Entry tiers work for basic needs, while enterprise tiers add advanced security, customization, and support.
05 Can I negotiate Microsoft Defender for Office 365 pricing below calculator estimates?
Negotiated pricing depends on the vendor, plan and contract. We do not assume a discount in this estimate. See our negotiation guide for tactics.