Microsoft booked $10 billion in revenue tied to OpenAI in the quarter ended September 30, 2026, nearly 11% of its total quarterly sales. The figure, now disclosed in its regulatory filing, shows how tightly the two companies remain bound financially even as their partnership loosens. The numbers are large, but the structure behind them is only partly visible.
🔑 Key takeaways
- Microsoft booked $10 billion in OpenAI-related revenue, or 10.8% of its $92.3 billion quarterly total.
- Microsoft’s stake in OpenAI fell to about 24% on an as-converted basis, from about 25% in June.
- Unpaid OpenAI receivables reached $7.2 billion, up from $6 billion at June 30.
- Azure grew 48%, beating Wall Street forecasts and Microsoft’s own 44% to 45% guidance.
A figure bigger than several legacy businesses
The regulatory filing covers the first quarter of fiscal 2027, which began in July. The $10 billion encompasses the full commercial relationship with OpenAI: Azure cloud services used to train and run models, as well as revenue-sharing payments. Microsoft did not split the two components, so the published figure alone cannot show how much OpenAI actually paid Microsoft in revenue share.
Against the prior year, the pace is steep. In fiscal 2026, which ended June 30, Microsoft recorded $24.1 billion of OpenAI-related revenue, an average of roughly $6 billion per quarter. The new $10 billion figure exceeds that average by about $4 billion, or roughly 66%. AI Weekly describes this as an acceleration of activity. Sustained at this quarterly rate, the line would annualize to about $40 billion a year, a mechanical extrapolation rather than a Microsoft forecast.
GeekWire puts the amount in perspective against other Microsoft activities in the same quarter:
| Business line | Quarterly revenue |
|---|---|
| OpenAI (commercial arrangements) | $10 billion |
| Azure | $33.17 billion |
| Search and advertising (including Bing) | $6.55 billion (+12%) |
| Xbox | $5.4 billion |
| Windows OEM licensing, Surface and other devices | $3.6 billion |
Sources differ slightly on search and advertising: GeekWire cites $6.6 billion, while MediaPost reports $6.55 billion. At $10 billion, the OpenAI relationship is therefore the largest contributor among the activities cited.
A diluted stake and a reshaped partnership
Microsoft’s filing puts its stake in OpenAI at about 24% on an as-converted basis at the end of September. It was about 25% in June and about 27% after the October 2025 recapitalization. Microsoft has not explained the reduction. Because of that equity position, OpenAI is now a related party under accounting rules, which requires Microsoft to report revenue generated with it.
“That represents nearly 11% of Microsoft’s total quarterly revenue of $92.3 billion, underscoring the significant financial ties that remain between the two companies, even as they increasingly compete for the same customers.”
TechCrunch, October 28, 2026
The dilution does not change the revenue recognized on its own, but it gradually reduces the share of OpenAI’s value that flows back to Microsoft.
The partnership dates to 2019, when Microsoft first invested in OpenAI. It later committed more than $13 billion and became OpenAI’s exclusive cloud provider. ChatGPT, launched at the end of 2022, ran on Azure. In October 2025, OpenAI was reorganized as a public benefit corporation. Microsoft gave up its right of first refusal and its exclusive cloud status, allowing OpenAI to work with rival providers. In return, OpenAI committed to buy an additional $250 billion of Azure services. An April 2026 agreement keeps revenue sharing in place until 2030, subject to a cap.
According to TechCrunch and AI Weekly, OpenAI shares 20% of its revenue with Microsoft under an earlier agreement tied to the investment of more than $13 billion. Neither company has publicly confirmed that percentage, so it should be kept separate from the amounts Microsoft has validated in its accounts.
Receivables and the payment timeline
At September 30, 2026, Microsoft carried $7.2 billion of unpaid receivables from OpenAI, up from $6 billion at June 30. These balances relate to earlier transactions. They should not be added to the $10 billion recognized during the quarter, and they do not mean the full amount was settled in cash during the period. MediaPost describes them as unpaid cloud service invoices, partly recorded on Microsoft’s balance sheet. TechCrunch notes it is unclear how much of the $10 billion was collected in cash.
| Metric | June 30, 2026 | September 30, 2026 |
|---|---|---|
| Stake in OpenAI (as-converted basis) | about 25% | about 24% |
| Unpaid OpenAI receivables | $6 billion | $7.2 billion |
AI Weekly estimates the receivables equal about 72% of one quarter of billing to OpenAI. Its analysis reads this as a recurring deferral of payments rather than settlement on delivery. That reading is an interpretation, not a statement from Microsoft.
Azure and Microsoft Cloud: growth beats expectations
For the quarter, Microsoft reported total revenue of $92.3 billion, up 19% year over year, and GAAP net income of $36.6 billion, up 32%. Microsoft Cloud revenue reached $63.9 billion, up 30%. Azure generated $33.17 billion, versus $22.38 billion a year earlier. GeekWire notes that Azure’s 48% growth beat Wall Street expectations as well as Microsoft’s own 44% to 45% outlook.
Cloud services now sit in the Agents and Infra segment, which generated $76.8 billion, up 25%. It includes Azure, enterprise server licenses, support for frontier models and cloud suites such as Microsoft 365. AI Weekly also notes that net gains from OpenAI investments added $207 million to net income in the quarter; the company did not detail that line item.
Fiscal 2026 context
For the fiscal year ended June, the annual report shows record revenue of $331.8 billion, up 18%, including $214.4 billion for Microsoft Cloud (+27%). Azure surpassed $100 billion in annual revenue for the first time, after 41% growth. Operating income reached $155.2 billion, up 21%.
Conclusion: less exclusive, still central
The relationship has loosened structurally and competitively, but it remains financially central. Microsoft now recognizes OpenAI-linked revenue every quarter, while rising receivables and a gradually shrinking stake show that the financial exposure is still significant.
Three scenarios stand out for the coming quarters. In the first, revenue stays near $10 billion a quarter and receivables stabilize, pointing to a controlled payment schedule. In the second, receivables keep rising faster than billings, raising questions about collection quality. In the third, growing use of rival cloud providers gradually reduces OpenAI’s weight within Azure. The sources report no immediate reaction in Microsoft’s share price; the only market reaction explicitly reported concerns Azure’s growth.
Sources
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