Microsoft Says It Booked $10 Billion in OpenAI Revenue in One Quarter, With $7.2 Billion Still Owed

Microsoft and OpenAI like to sound like rivals. Microsoft's latest quarterly filing reads more like a shared ledger. In its 10-Q, filed Wednesday, Microsoft says it recorded $10.0 billion of revenue from commercial arrangements with OpenAI in the quarter ended September 30, the first quarter of its fiscal 2027. That is nearly 11% of the $92.3 billion in total revenue Microsoft reported for the period.

Read the verb carefully. Microsoft says "recorded," not "received." Revenue is what a company books for services delivered. Cash is a different line. Microsoft's filing does not say how much of the $10.0 billion has actually been collected, and it does not split the figure between cloud services and revenue sharing. TechCrunch, which asked Microsoft for that breakdown, says it is not clear. MediaPost's read is that the money comes mainly from cloud computing fees alongside revenue-sharing, but that is the outlet's characterization, not something the 10-Q spells out.

"For the three months ended September 30, 2026, we recorded revenue from commercial arrangements with OpenAI, inclusive of revenue-sharing payments, of $10.0 billion. Accounts receivable from OpenAI as of September 30, 2026 and June 30, 2026 was $7.2 billion and $6.0 billion, respectively." Microsoft Form 10-Q, Note 1

That second sentence is where the story gets interesting. Microsoft's receivables from OpenAI stood at $7.2 billion at the end of September, up from $6.0 billion at the end of June. By simple subtraction, the balance grew $1.2 billion in one quarter. TechCrunch notes that this is money OpenAI owes for earlier transactions, not extra revenue on top of the $10.0 billion. Nothing in the filing says OpenAI is late. It also does not explain why the balance is growing. A customer that is also a competitor, and also a roughly 24% owner, is a customer whose bills deserve a footnote.

The scale is hard to wave away. TechCrunch reports that revenue from OpenAI for all of fiscal 2026 was $24.1 billion, which means this one quarter equals about 41% of that full year. TechCrunch also does the extrapolation, noting that at the latest quarterly pace the annual figure would be about $40 billion. That is arithmetic, not guidance from Microsoft. For comparison, Microsoft's earnings tables put search and advertising at $6.55 billion for the quarter.

The ownership picture is just as tangled. The 10-Q says Microsoft holds an equity-method investment representing an approximate 24% interest in OpenAI on an as-converted basis, and that it has made total funding commitments of $13.0 billion, of which $12.0 billion has been funded. TechCrunch says the stake has slipped from about 25% in June, and from roughly 27% after OpenAI's October 2025 recapitalization. Microsoft did not say why. The filing also shows $272 million of net gains from OpenAI investments this quarter, against $4.1 billion of net losses a year earlier.

Then there is the rivalry. Under an October 2025 agreement, per TechCrunch, OpenAI committed to buy an additional $250 billion of Azure services while gaining freedom to use other cloud providers. OpenAI is now taking its models to Google too, as we covered in our look at OpenAI models on Google Cloud. An April 2026 deal, TechCrunch reports, keeps OpenAI sharing revenue with Microsoft through 2030, subject to a cap. OpenAI reportedly shares 20%, though neither company has confirmed that. Microsoft's own filing is blunter and shorter: it says it "will continue to receive revenue-sharing payments."

My read: this is a concentration story, even if Microsoft does not frame it that way. Nearly one dollar in nine of Microsoft's quarterly revenue is tied to a single counterparty that is simultaneously a partner, a rival and an investment on Microsoft's books. It worked this quarter. Azure revenue rose 48% to $33.2 billion, according to Microsoft's release. But CNBC reports that Microsoft's free cash flow fell 27% to $18.63 billion in the same period. Revenue and cash are not the same thing, for Microsoft or for the company paying its invoices.

What to watch next is simple. If the receivables line keeps climbing faster than the cloud bills it reflects, investors will want an explanation. The full numbers are in Microsoft's 10-Q and the TechCrunch report.