Field note
Why is Copilot Business adding usage-based billing
New Copilot Business purchases now come with metered billing switched on, not opt-in. Existing subscriptions are untouched, but the next seat you buy will work differently.
Microsoft is adding usage-based billing to Copilot Business because newer agentic features, Copilot Cowork, the Work IQ API, and the GitHub Copilot Harness, run variable compute per task rather than fixed work per seat. From October 19, 2026 (direct) and November 2, 2026 (CSP), every new subscription switches it on by default, with a $10-per-user monthly cap.
What did Microsoft actually change?
Microsoft posted Message Center item MC1476200, titled 'Simplifying AI access: introducing usage-based billing', on September 21, 2026. It sets a new default for every new Microsoft 365 Copilot Business purchase: direct purchases from October 19, 2026, and purchases through a Cloud Solution Provider from November 2, 2026. Each new subscription now gets an Azure billing resource created automatically and a spending policy applied with a default limit of $10 per seat per month, so that credit-metered features work the moment someone opens them rather than needing separate setup first.
Existing Copilot Business subscriptions bought before those dates keep their current billing and are not switched over.
Which features does the metered billing actually cover?
The eligible experiences Microsoft named at launch are Copilot Cowork, the Work IQ API, and the GitHub Copilot Harness. These are the newer, agent-style features that can run variable amounts of compute per task rather than a fixed amount of work per seat, which is why Microsoft is billing them by consumption instead of folding them into the flat per-seat price. Copilot inside Word, Excel, Outlook and Teams is not metered by this change; it stays covered by the regular seat licence.
Does this change what my current Copilot Business seats cost?
No, not if you bought before the rollout date that applies to you. The per-seat price for Copilot Business is unchanged, and this announcement does not retroactively add metered billing or an Azure resource to a subscription you already hold. It only applies going forward, to new purchases.
What should I check before buying a new Copilot Business seat?
Once a new subscription is active, Microsoft's own guidance is to go into the Microsoft 365 admin center and confirm or adjust the spending policy rather than leave the $10-per-user default untouched. If several people will use Copilot Cowork or the Work IQ API regularly, decide who is allowed to raise that limit before someone hits it mid-task. And because the billing now runs through an Azure resource, whoever manages your Azure spend should know a new one exists, so it does not show up unexplained on a cloud invoice later.
Default monthly spending limit Microsoft applies to new Copilot Business usage-based billing
Microsoft, Partner Center announcements: September 2026 (Message Center post MC1476200), 2026
Sources
- Microsoft, Partner Center announcements: September 2026 (MC1476200, Simplifying AI access: introducing usage-based billing)
- Stone Ridge Software, Automatic Usage-Based Billing Is Coming to Microsoft 365 Copilot Business
- Schneider IT Management, Microsoft 365 Copilot Business: usage-based billing default
The takeaway
If you are buying new Microsoft 365 Copilot Business seats after October 19, 2026 (CSP: November 2), open the Microsoft 365 admin center once the subscription is active and check the $10-per-user spending policy before anyone starts using Copilot Cowork or the Work IQ API.