Microsoft Copilot licensing explained: Copilot Chat, the $30 add-on, Copilot Studio and what E3/E5 already include

Three products share one name, two of them were renamed this year, and the free tier overlaps both — no wonder Copilot licensing is the most confused topic in every tenant. Here is the whole map, with every price checked on Microsoft's own pricing pages.

First, the names

• Microsoft Copilot — the paid add-on formerly named Microsoft 365 Copilot (Microsoft renamed it in 2026; most people, and most search results, still use the old name). This is the $30 seat.
• Microsoft Copilot Chat (formerly Microsoft 365 Copilot Chat) — the free enterprise AI chat included with eligible Microsoft 365 subscriptions, at copilot.cloud.microsoft.
• Microsoft Copilot Studio — the separate product for building agents, licensed through Copilot Credits, not user seats.
• Agent Builder / Copilot Studio Lite — the lightweight agent-building surface inside Copilot; its output runs under the Copilot licences above, not under Power Platform management.

The price list (checked 17 October 2026)

What E3 and E5 users already have

Everyone signing in with an Entra work account on an eligible subscription — Microsoft 365 E3, E5, F1, F3, Business Basic and up, and even Office 365 E1 — gets Copilot Chat at no extra cost:

• Web-grounded chat on the latest OpenAI models, with enterprise data protection, in the Copilot app, Edge, Teams and Outlook.
• Organisational content on demand: paste it, upload a file, or use Chat beside an open document — but Chat does not search your tenant by itself.
• Agents from the Agent Store that ground only on instructions and public websites — included free once an admin enables them.
• Metered extras, no seat required: work-grounded chat and agents that touch tenant data (SharePoint, Copilot connectors, Microsoft Graph) can run on pay-as-you-go billing — the organisation pays per use through Azure, per message, instead of buying anyone a licence. Admins can cap and target this with prepaid capacity packs (25,000 credits each) and Copilot credit policies scoped to user groups; when a credit-policy pool runs dry with no pay-as-you-go behind it, those users' metered features stop until the next cycle.

What E3/E5 users cannot do without more licensing: use Copilot inside Word, Excel, PowerPoint or Teams, get chat that searches work data by default, or use the premium agents — that's the add-on's territory.

E3 vs E5 — does it change Copilot? The Copilot features themselves are identical from both. What differs is the surroundings: E5 brings Security Copilot entitlement, deeper Purview (including prompt-and-response visibility in DSPM for AI), advanced audit with long retention, and unlimited Copilot-connector index quota — the governance around AI rather than the AI itself. E5 costs more than E3; neither includes the Copilot seat.

What the $30 add-on actually adds

Per Microsoft's own comparison, the add-on takes everything in Copilot Chat and adds:

• Work grounding by default — chat that searches your mail, files, meetings and Graph without uploading anything, plus Copilot Search and Notebooks in full.
• Copilot embedded in the apps: Word, Excel, PowerPoint, Outlook, OneNote and Teams (a Teams licence is required for the Teams experiences).
• Priority model access instead of standard, memory and personalisation, and the premium pre-built agents (Researcher, Analyst, Facilitator).
• Agent usage included — the same agents that bill per message for Chat-only users are covered by the seat.
• Copilot Studio rights for internal agents: building and using agents on the Copilot Chat and Standard harnesses inside Microsoft 365.

A prerequisite applies: the add-on sits on top of a qualifying plan (E3/E5/F-plans, Business plans, and others down to Exchange or SharePoint standalone plans).

Copilot Studio: the agent factory

Copilot Studio is licensed like a utility, not like Office:

• The tenant pays for credits. A prepaid pack is $200/month for 25,000 Copilot Credits (the currency renamed from "messages" on 1 September 2025 — same quantity, same rate). Pay-as-you-go through Azure covers overflow or replaces packs entirely; pre-purchase commit units discount heavy volume. Capacity is enforced monthly, unused credits don't roll over, and sustained overage without coverage ends in service denial.
• Makers are free. The Copilot Studio User Licence costs nothing and is assigned per maker (the tenant needs a pack, pay-as-you-go or trial first) — or admins grant access via the Copilot Studio authors security group. A Microsoft Copilot seat also carries Studio rights for extending Copilot.
• People chatting with your agent usually need nothing — the credits the agent burns are the cost. Our Copilot Studio licensing and Copilot Credits guide breaks down what each feature costs in credits.
• External and autonomous agents need standalone Studio: publishing to websites, apps or other outside channels, premium connectors, Dataverse storage and Power Platform admin management come with the credit-licensed product, not with the $30 seat.

The trials, including the "viral" one. Anyone can self-sign-up for a Copilot Studio trial: full building and testing in the test chat, but no publishing. The self-service path (Microsoft's AllowAdHocSubscriptions setting) is what admins call the viral trial — and it has a documented sting: a viral-trial licence sitting on an account can override a real assigned user licence and block publishing until an admin removes the trial licence in the Microsoft 365 admin center. If a licensed maker "suddenly can't publish", check for a stray viral trial first. Admins can block viral sign-ups entirely.

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1. 1Everyone on M365
2. 2Copilot Chat, free
3. 3Daily Copilot-in-Office users
4. 4the $30 add-on
5. 5Agent builders
6. 6free maker licence + tenant credits
7. 7Agent users
8. 8credits pay, not people

Which costs more? Match the licence to the usage

• A 1,000-person E3 tenant where 50 people live in Copilot: 50 add-on seats ($30 each) and Chat-plus-metered for everyone else beats 1,000 seats by an order of magnitude. Microsoft's own positioning says exactly this — the add-on is "for frequent users", Chat with pay-as-you-go "for occasional users".
• Heavy agent usage with light chat: Studio credits are the cost driver, and a $200 pack (25,000 credits) or pay-as-you-go may dwarf or undercut seats depending entirely on message volume — forecast with Microsoft's agent usage estimator before committing.
• The expensive mistake in both directions: buying $30 seats for people who ask three questions a week, or letting metered agents run tenant-wide with no credit policy and discovering the Azure bill. Capacity packs with scoped credit policies exist precisely to cap the second case.

Sources

• Microsoft Copilot plans and pricing (enterprise) — microsoft.com
• Microsoft Copilot Studio plans and pricing — microsoft.com
• License options for Microsoft Copilot — Microsoft Learn
• Manage Microsoft Copilot Chat — Microsoft Learn
• Prepare for Microsoft Copilot by comparing E3, E5, and E7 — Microsoft Learn
• Licensing for agents powered by the standard harness — Microsoft Learn
• Use Copilot Studio capacity packs for Copilot Chat — Microsoft Learn
• License errors when publishing or accessing Copilot Studio — Microsoft Learn