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Small business calculator
Compare the Business plans with each other and with E3/E5. See what it costs, and what you gain or lose when you move up or down.
"Premium + Defender Suite" = Business Premium plus the Defender Suite add-on.
What changes
Microsoft prices checked Oct 15, 2026
Result
per user per month
Prices and sources
How this works
Prices are Microsoft US list prices, per user per month, paid yearly, from Microsoft licensing news, Microsoft business plans and Defender Suite for Business Premium, checked Oct 15, 2026. Business plans are capped at 300 seats in total across the Business family (Microsoft Learn). Features come from our Which plan has it? table. Where you lose a security feature, the third-party prices from our competitor price list are shown for reference. They are neutral public list prices, not recommendations. Read the small business guide for the plain-English version.