Microsoft discloses $10bn quarterly OpenAI revenue

Microsoft recorded $10bn of revenue from its commercial arrangements with OpenAI in the three months to September 30, 2026, equal to about 11% of its total revenue for the quarter. The figure appeared in the company's quarterly filing and marks the first time Microsoft has given a quarterly number for the closely watched relationship.

The filing states that for the three months ended September 30, 2026, Microsoft recorded revenue from commercial arrangements with OpenAI, inclusive of revenue-sharing payments, of $10.0 billion. The disclosure does not separate revenue-sharing payments from OpenAI's spending on Azure, Microsoft's cloud platform, leaving investors to infer how much of the total comes from each part of the relationship.

Key facts at a glance

• Microsoft recorded $10.0bn of revenue from OpenAI arrangements in the quarter to September 30, 2026.
• The amount represented about 11% of Microsoft's total quarterly revenue.
• It was the first quarterly disclosure of revenue from the OpenAI relationship.
• Microsoft recorded $24.1bn from OpenAI in the 12 months to June, or roughly $6bn a quarter on average.
• The latest quarterly OpenAI revenue exceeded Xbox revenue of $5.4bn and search and advertising revenue of $6.6bn.
• OpenAI owed Microsoft $7.2bn at the end of September, up from $6.0bn in June.
• Microsoft owns about 24% of OpenAI and has paid $12.0bn of the $13.0bn it committed to invest.
• Microsoft's stake was about 25% in June and about 27% after OpenAI's restructuring in October 2025; the company did not say what caused the dilution.
• Microsoft must disclose the business because OpenAI counts as a related party under accounting rules.
• The companies have loosened some parts of their partnership, including Microsoft giving up a right of first refusal to supply OpenAI's computing capacity in October 2025.
• OpenAI committed to buy another $250bn of Azure services, and an April 2026 agreement gave it broader freedom to use other cloud providers.
• OpenAI will keep sharing revenue with Microsoft through 2030, subject to a cap.
• Microsoft cut its 2026 capital spending forecast to $170bn from $175bn.
• Capital spending including finance leases was $45.2bn in the quarter, below Microsoft's own $50bn projection.
• Microsoft's headcount fell 2% in the quarter, and the company offered buyouts to 60,000 employees.

The revenue disclosure gives investors a clearer view of how much Microsoft earns from a partnership that has shaped its AI strategy and its Azure cloud business. The filing places the OpenAI contribution at roughly one-ninth of total revenue, a scale large enough to move investor perceptions of Microsoft's growth and risk profile. The absence of a split between revenue sharing and Azure consumption is notable because the two streams carry different economic and strategic implications. Revenue sharing reflects the terms of the partnership, while Azure spending reflects OpenAI's demand for computing capacity and Microsoft's ability to convert AI workloads into cloud revenue.

The comparison with Microsoft's other businesses underlines how quickly the OpenAI relationship has grown. In the latest quarter, OpenAI-related revenue of $10bn was larger than the $5.4bn brought in by Xbox and the $6.6bn generated by search and advertising. Over the 12 months to June, Microsoft recorded $24.1bn from OpenAI, equivalent to about $6bn a quarter on average. The jump to $10bn in the September quarter suggests that the relationship is becoming more material at a time when Microsoft is spending heavily on data centers, chips and other infrastructure for AI.

Microsoft's balance-sheet exposure to OpenAI also draws attention. OpenAI owed Microsoft $7.2bn at the end of September, up from $6.0bn in June. Microsoft owns about 24% of OpenAI and has paid $12.0bn of the $13.0bn it committed to invest. The stake was about 25% in June and about 27% after OpenAI's restructuring in October 2025. Microsoft did not say what caused the dilution to about 24%, a detail that may matter to investors tracking the value of its investment and the changing structure of the partnership.

The accounting treatment explains why the figure is now visible. OpenAI counts as a related party under accounting rules, which requires Microsoft to disclose the business. That requirement turns a relationship that was once discussed mainly in strategic terms into a line item that analysts can compare with other parts of Microsoft's portfolio. It also creates a channel for investors to assess how much of Microsoft's AI narrative is tied to a single partner and how much is coming from a broader base of customers.

A partnership with looser ties

The two companies have loosened their partnership in several stages. In October 2025, Microsoft gave up its right of first refusal to supply OpenAI's computing capacity. OpenAI committed to buy another $250bn of Azure services. An April 2026 agreement gave OpenAI broader freedom to use other cloud providers, and OpenAI recently brought its models to rival Google Cloud. Those changes reduce Microsoft's exclusivity while preserving a large commercial relationship.

OpenAI will keep sharing revenue with Microsoft through 2030, subject to a cap. Earlier reports have said OpenAI shares 20% of its revenue, a figure neither company has confirmed. The cap and the revenue-sharing terms matter because they determine how much Microsoft benefits as OpenAI's products and customer base expand. They also shape the economics of a partnership in which Microsoft is both an investor and a supplier of cloud capacity.

On the earnings call, an analyst asked where Azure's AI growth was coming from. Chief executive Satya Nadella did not mention OpenAI. He said he did not want Azure's AI business to depend on a few large customers. Relying on four customers who buy a lot of capacity for a few quarters of growth was not a business as far as he was concerned, according to his remarks. In a post on X after the call, Nadella wrote that Azure's growth was broad-based across large and small businesses. He also described a fungible fleet that allows Microsoft to dynamically allocate capacity to the highest-value opportunities across compute, data, Foundry and Copilot, and said the company was bringing capacity online faster while getting more from existing infrastructure.

The filing also widened a warning about Microsoft's reliance on outside AI model makers. It says Microsoft has limited visibility into or control over how those models are designed, trained, secured and tested. Some of those partners are also significant Azure customers, the filing adds. That dual role creates both opportunity and risk: the same companies that help Microsoft offer cutting-edge AI models also depend on its cloud, and any shift in their plans could affect both revenue and capacity demand.

Spending forecast trimmed

Chief financial officer Amy Hood cut Microsoft's 2026 capital spending forecast to $170bn from $175bn. She said some GPU-as-a-Service contracts with outside capacity providers had slipped to the second half of the fiscal year. Capital spending including finance leases was $45.2bn in the quarter, below Microsoft's own $50bn projection. The cash part of spending on property and equipment was $39.4bn, according to the filing.

Hood said spending would top $50bn in the current quarter. Investor relations chief Jonathan Neilson put the shortfall down to delays rather than any change in spending plans. The distinction matters because investors are trying to judge whether Microsoft is slowing its AI infrastructure buildout or simply shifting the timing of projects. The company's headcount fell 2% in the quarter, and this week Microsoft offered buyouts to 60,000 employees, a move that adds to the picture of cost discipline alongside heavy capital investment.

The OpenAI disclosure and the capital spending update together show a company trying to balance rapid AI expansion with investor scrutiny of returns. Microsoft is still spending tens of billions of dollars on infrastructure, but it is also giving more detail about the revenue generated by its most prominent AI partnership. The filing does not resolve every question about the economics of the relationship, but it provides a new benchmark for assessing how much Microsoft earns from OpenAI, how much OpenAI owes Microsoft, and how the balance of power between the two companies is changing as their ties become less exclusive.

For now, the numbers point to a relationship that remains large and financially significant even as it becomes more open. Microsoft's OpenAI revenue reached $10bn in a single quarter, more than Xbox and more than search and advertising. OpenAI's obligations to Microsoft rose to $7.2bn, and Microsoft's investment commitment was nearly fully paid. The partnership has been reshaped by new cloud freedoms and revenue-sharing terms that run through 2030. The next quarters will show whether the $10bn figure is a step change or a peak shaped by timing, and whether Microsoft's broader Azure customer base can deliver the diversified AI growth that Nadella described.

Source:TNW | Openai News