Microsoft recorded about $10 billion in revenue from its commercial arrangements with OpenAI in the quarter ended September 30, 2026, according to a TechCrunch report that read the figure from a Microsoft regulatory filing. That is roughly 11% of the $92.3 billion in total quarterly revenue. For a company that sells the same models it also builds rivals to, it is one of the clearest windows we get into how tightly the two are still bound.
The number is a filing figure, not a leak. What is not in the filing is just as important: how much of the $10 billion is OpenAI's revenue share and how much is OpenAI buying Azure compute. This post lays out what is reported, what is unknown, and how it fits the larger story we have been tracking.
TL;DR: the numbers at a glance
| Question | Answer | Source |
|---|---|---|
| Revenue from OpenAI, quarter to Sept 30, 2026 | About $10B, ~11% of $92.3B | TechCrunch, citing Microsoft's filing |
| Revenue from OpenAI, full fiscal 2026 | $24.1B | Microsoft FY2026 10-K, as reported by Techzine and TechCrunch |
| Receivables from OpenAI | $7.2B at end of September, up from $6B in June | TechCrunch |
| Microsoft stake in OpenAI | About 24% (25% in June; ~27% after Oct 2025 recapitalization) | TechCrunch |
| Split of revenue share vs Azure | Not disclosed | TechCrunch |
| OpenAI revenue-share rate | 20% reported by Reuters, never confirmed by either company | TechCrunch, citing Reuters |
What exactly did Microsoft report?
The filing line is revenue from commercial arrangements with OpenAI. TechCrunch says this includes revenue-sharing payments, and that the article could not say how much came from revenue sharing versus Azure cloud services. TechCrunch said it had asked Microsoft for more information.
Two other figures give the $10 billion a shape. The full fiscal 2026 total, per Microsoft's annual 10-K, was $24.1 billion. If the latest quarter's pace held for four quarters, TechCrunch calculates it would be about $40 billion a year. That is the reporter's extrapolation from one quarter, not guidance, and one quarter can include one-time items.
The part that is easy to misread: revenue versus receivables
OpenAI owed Microsoft $7.2 billion at the end of September, up from $6 billion at the end of June. This is a balance-sheet item for money owed for past transactions. It is not extra revenue and it does not by itself signal trouble: large customers on invoice terms carry big receivable balances. The balance did grow by about $1.2 billion in the quarter, and the filing as reported does not say why.
Treat any headline that adds the receivable to the revenue as wrong. They are different lines.
How did we get here? A short timeline
The relationship has changed shape several times, and the filing only makes sense with that history.
- October 2025: Microsoft gave up its exclusive hold on OpenAI as a cloud provider. In exchange, per TechCrunch, OpenAI committed to buying an additional $250 billion of Azure services. Microsoft's stake was roughly 27% after OpenAI's recapitalization.
- November 2025: TechCrunch reported, citing leaked documents, that Microsoft received $865.8 million in net revenue-sharing payments from OpenAI in the first nine months of 2025.
- April 2026: A new agreement under which, per TechCrunch, OpenAI keeps sharing revenue with Microsoft through 2030, subject to a cap, and may work with competing cloud providers.
- June 2026: Microsoft's fiscal year ends with $24.1 billion of OpenAI revenue and a $6 billion receivable.
- September 2026: About $10 billion for the quarter, a $7.2 billion receivable, and a stake near 24%.
Reuters reported earlier that OpenAI shares 20% of its revenue with Microsoft. Neither company has confirmed that number, so we treat it as reported, not verified.
Why the stake slipped from 25% to 24%
Microsoft's stake in OpenAI moved from about 25% in June to 24% in September, according to TechCrunch, and Microsoft did not say why. A fall like that is typically dilution: when a company issues new shares to other investors or for employee compensation, existing holders own a smaller slice without selling anything. That is a general explanation, not something the filing states for this quarter, so read it as a likely mechanism rather than a finding.
Why would a builder care about Microsoft's accounting?
Because the money flow decides capacity and pricing pressure. Three things follow from the reported figures.
- Azure is still a major destination for OpenAI's compute spend. Even after OpenAI was allowed to use other clouds, the filing shows large payments flowing to Microsoft. OpenAI has been widening its footprint in the meantime, for example with Google Cloud's Model Garden and with Oracle's OCI for a ChatGPT and Codex workspace.
- Microsoft is hedging. It sells OpenAI models but also works with Anthropic. We covered the reported Anthropic payments for Copilot and the awkward who-bills-whom question on a Claude bill in Azure Foundry.
- Circularity risk is real. Part of OpenAI's cash goes to Azure, and part of Microsoft's cash funds OpenAI. We analyzed that loop in our piece on Microsoft, OpenAI and circular AI revenue.
For a team choosing between Azure OpenAI deployments and going direct, nothing in the filing changes prices, limits or model availability. What it supports is the planning assumption that both companies have strong financial reasons to keep the pipeline reliable.
How big is $10 billion next to OpenAI's own numbers?
OpenAI's top-line revenue is not in Microsoft's filing, and published run-rate figures vary by source. We looked at one disputed number in why OpenAI's run rate was $50 billion, not $70 billion. A useful caution: Microsoft's $10 billion is what Microsoft earned from OpenAI, which includes cloud services OpenAI pays for. It is not a measure of what OpenAI earns from customers, and the two should never be compared as if they were the same thing.
On the cost side, the scale of what labs have committed to buy is huge. Our breakdown of Anthropic's reported compute commitments is a useful companion for how these multi-year purchase promises are counted and how they differ from cash actually paid.
Why the revenue-share versus Azure split matters
The two components behave differently, and the filing does not separate them. Revenue share is a percentage of what OpenAI earns, so it rises when ChatGPT subscriptions, API usage and enterprise contracts rise, and it is capped under the April 2026 terms TechCrunch describes. Azure spend is a cost for OpenAI: it rises with training runs and with serving more users, and it is committed over years under the $250 billion purchase promise from October 2025.
If most of the $10 billion were revenue share, it would be a direct read on OpenAI's growth. If most were Azure spend, it would mostly show OpenAI's compute appetite, which can grow even when its income does not. That is why analysts keep asking Microsoft for the breakdown, and why a single headline number should not be turned into a conclusion about OpenAI's health.
There is a second wrinkle. Because OpenAI is also free to use rival clouds, a growing share of its compute could migrate away from Azure in future quarters while the revenue-share line keeps rising. The next few filings will show whether the mix shifts. Watch for any new disclosure in Microsoft's earnings call remarks or in the notes to its quarterly report.
What is confirmed, what is claimed, what is unknown
Confirmed (via filing, as reported): about $10 billion of revenue from OpenAI arrangements in the quarter; $24.1 billion for fiscal 2026; a $7.2 billion receivable; a stake of about 24%.
Reported but not confirmed by either company: the 20% revenue-share rate (Reuters); the April 2026 cap details beyond what TechCrunch summarizes.
Unknown: the split of revenue share versus Azure usage; what caused the one-point dilution; how much of the receivable is overdue versus ordinary invoice terms; whether the $40 billion annualized figure will hold.
How to check this yourself
- Open Microsoft's latest quarterly report (Form 10-Q) on the SEC's EDGAR database and look for the related-party or OpenAI note.
- Compare the quarter's OpenAI revenue to the fiscal 2026 total in the 10-K.
- Find the line for receivables and compare it with the June 30 balance.
- Read the equity-method note for the ownership percentage.
We did not retrieve the 10-Q text ourselves for this post, so the quarter figures here are as reported by TechCrunch. If the filing wording differs, trust the filing.
What this means for what you build or pay
For most developers the practical meaning is stability, not price. The two companies are financially entangled enough that a sudden break in Azure-hosted OpenAI access would hurt both. The risk to watch is concentration: if your product depends on a single model through a single cloud, you inherit whatever happens in this relationship. Multi-provider routing, as more teams adopt, is the sensible hedge.
If you are budgeting, treat any claim that OpenAI usage costs are about to fall or rise because of Microsoft's accounting with caution. The filing is about Microsoft's revenue, not your invoice.
Bottom line
A $10 billion quarter makes Microsoft's OpenAI business one of the largest single-customer relationships in tech, and it is growing alongside a receivable and a shrinking ownership percentage. The honest summary is that the totals are public while the mechanics are not. Until Microsoft or OpenAI breaks out revenue share versus cloud spend, any claim about who is subsidizing whom is an inference.
Related reading
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Is Microsoft paying Anthropic $2 billion a year for Copilot?
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Microsoft's $170B calendar 2027 capex guidance and Azure +48%
Figures are as reported by TechCrunch on October 28, 2026, and may change as the full filing is analyzed. Check the SEC filing for exact wording.