Start with the piece almost everyone means. Microsoft 365 Copilot is $30.00 per user per month paid yearly. It is an add-on, and Microsoft is explicit that a separate license for a qualifying Microsoft 365 plan is required. You cannot buy it on its own, so the number that belongs in your budget is the base plan plus $30. On Microsoft 365 E3 at $39.00 that is $69 a seat. On E5 at $60.00 it is $90. Anyone quoting Copilot at $30 a seat is quoting the smaller half of the bill.
The small and mid-market SKU is where the volatility lives. Copilot Business has moved three times in ten weeks: $18, then $21 in July 2026, and now back to $18 as a discount. Microsoft's own page shows it as a strikethrough, and adds two conditions that most write-ups drop. The promotional pricing applies to the first year only, so year two is $21 unless something changes, and the offer window has already moved once. On August 24, 2026 Microsoft's page read July 1 to September 30, 2026 while widely-read summaries said December 31. On August 31, 2026 the same page reads July 1 to December 31, 2026. Treat the end date as something Microsoft edits, and get it onto your order form rather than trusting any write-up, this one included.
There is a second condition on Copilot Business that matters more than the price and gets mentioned far less: it supports up to 300 users. That is a cliff, not a taper. Cross it and you are on the $30 enterprise add-on, which is a 67 percent jump per seat, and you are also changing the base plan family underneath. A 280-person company that plans to hire is buying a repricing event, not a discount.
The last layer is the one that breaks business cases. Agent work is metered separately from seats. Copilot Studio is sold tenant-wide in packs of 25,000 Copilot Credits at $200.00 per pack per month, and Microsoft Learn documents a pay-as-you-go alternative billed at $0.01 per message through an Azure subscription. Pay-as-you-go covers Copilot Chat agents, SharePoint agents and the Copilot Retrieval API, and it is turned off by default, which is a genuinely good default. Do the division before you choose: a prepaid pack works out at $0.008 a message, so prepaying is about 20 percent cheaper than the meter if you will actually use the capacity.
We sell InSearch, so read the comparison with that in mind. What we have tried to do here is publish the ladder accurately, with the date on every figure and the conditions Microsoft attaches, including the ones that make Copilot look better than the shorthand suggests.
The shortlist side of this decision is on Microsoft Copilot alternatives, which compares ten competitors on published price, reach and permissions. If you are near the 300-seat line, what Microsoft 365 Copilot costs for 300 users runs the Copilot Business against enterprise add-on math over three years. The new top tier is broken down in what Microsoft 365 E7 costs per user. If agents are in scope, Copilot Studio versus Microsoft 365 Copilot licensing covers the credit model and Copilot Studio versus Azure AI Foundry covers the platform fork. For a price comparison against the other name on most shortlists, see Glean pricing and Glean versus Copilot pricing. The wider field is on enterprise search tools, and if your content lives in SharePoint, SharePoint search covers the native limits.