Microsoft booked $10 billion from OpenAI in one quarter, and OpenAI owes it $7.2 billion

Microsoft earned roughly $10 billion from OpenAI in a single quarter, and OpenAI ended the period owing it $7.2 billion. The figures, from Microsoft's quarterly filing for the three months ended September 30, 2026, put a number on a relationship that both companies describe as a partnership and increasingly operate as a rivalry. They also raise a question the filing does not answer: how much of that revenue is real cloud demand and how much is OpenAI paying Microsoft a share of its own sales.

The numbers

TechCrunch's Rebecca Bellan reported on October 28 that Microsoft disclosed about $10 billion in revenue from commercial arrangements with OpenAI, including revenue-sharing payments, in the quarter. Microsoft's earnings release puts total revenue for the quarter at $92.3 billion, up 19% from $77.7 billion, so the OpenAI line is nearly 11% of the whole.

Receivables are the other number. TechCrunch reports $7.2 billion outstanding from OpenAI at the end of September, up from $6 billion at the end of June. Those are amounts owed for earlier transactions, not new revenue. The balance grew by about $1.2 billion in a quarter in which OpenAI paid Microsoft about $10 billion.

For scale, Techzine reported in August that Microsoft's annual report showed $24.1 billion in revenue from OpenAI commercial agreements for the full fiscal year ended June 30, 2026. One quarter at $10 billion implies a pace of about $40 billion a year, which is TechCrunch's own arithmetic, not a forecast from Microsoft.

What we do not know

The filing does not split the $10 billion between Azure services OpenAI buys and the revenue-sharing payments it makes. Techzine called the makeup of the earlier $24.1 billion "somewhat of a guess," and noted that Microsoft normally reports this inside its Azure and Intelligent Cloud segment. TechCrunch said it had asked Microsoft for more detail.

The distinction matters. Cloud sales would show OpenAI's compute appetite. Revenue share would track OpenAI's own sales growth, and TechCrunch notes that a reported 20% share has never been confirmed by either company. TechCrunch adds that an April 2026 agreement obliges OpenAI to keep sharing revenue with Microsoft through 2030, subject to a cap.

The stake is shrinking

TechCrunch reports Microsoft's ownership of OpenAI fell from about 25% in June to 24% in September. After the October 2025 recapitalization it was roughly 27%. Microsoft did not say what caused the latest dilution, and new investors joining OpenAI's rounds are the obvious candidate. Our coverage of OpenAI's reported $30 billion raise at a $1.25 trillion pre-money valuation shows how quickly the denominator is moving.

Microsoft's own release shows the investment's effect on earnings. GAAP net income was $36.6 billion, up 32%, while non-GAAP net income, which excludes the OpenAI impact, was $36.4 billion, up 18%. The OpenAI investments produced a net gain of $207 million this quarter, against a net loss of $3.1 billion a year earlier.

The capital behind it

The quarter's cloud numbers are large. Azure revenue rose 48% to $33.2 billion from $22.4 billion, and Microsoft Cloud revenue reached $63.9 billion, up 30%. Cash additions to property and equipment were $39.4 billion, roughly double the $19.4 billion of a year earlier. The release does not use the word capex, so that line is the closest figure, and it is not the same as a guided capital expenditure number.

TechCrunch also recounts the October 2025 changes: Microsoft gave up its exclusive hold on OpenAI, and OpenAI committed to buy an additional $250 billion of Azure services. That commitment is the reason the receivables line deserves attention. A customer that has promised a quarter of a trillion dollars of future purchases and is also running a growing balance owed is a credit exposure as well as a growth story.

How to size the receivables

A rough comparison helps. Receivables of $7.2 billion are about 72% of one quarter's $10 billion in OpenAI revenue, though the two numbers do not measure the same thing: the balance covers amounts owed across earlier transactions, while the revenue is what Microsoft booked this quarter. The balance rose by about 20% in three months, from $6 billion to $7.2 billion. That is not alarming for a large corporate customer, and Microsoft does not flag it as a concern. It is, however, the line that would move first if OpenAI's cash needs outran its funding.

The earnings release adds a counterpoint. Satya Nadella, Microsoft's chairman and chief executive, said: "We are delivering greater capability, choice, control, and cost efficiency for customers across our entire stack." That is a general statement about Microsoft's customers, not a comment on OpenAI. Microsoft's release does not discuss OpenAI revenue at all; the figure reached the public through the filing and TechCrunch's reading of it, which is why we cannot tell you more about its structure than the filing's own language allows.

Two caveats apply to everything above. We relied on TechCrunch's reading of the filing for the $10 billion and $7.2 billion figures because we could not open the filing itself, and the ownership percentages come from the same report. If Microsoft's own filing words any of them differently, the filing governs.

Our take

Ten billion dollars a quarter is a striking number, but the useful reading is conservative. It confirms OpenAI is Microsoft's largest named counterparty and that the relationship is deepening in dollars even as the stake thins. It does not show how much of Microsoft's 48% Azure growth depends on one customer. Watch three lines in the next filing: receivables from OpenAI, any disclosure of the revenue-share versus cloud split, and the ownership percentage after OpenAI's next round closes.