Why OpenAI’s $11.5B Loss Doesn’t Threaten Microsoft’s AI Strategy

Microsoft’s $31 B Hit from OpenAI Investment

Microsoft posted a record $277 billion net profit in Q3 2025, up 12 percentage points year‑over‑year, yet it noted a $31 billion reduction in profit and EPS due to its OpenAI investment.

The loss stems from the equity‑method accounting: OpenAI’s earnings (or losses) are reflected in Microsoft’s "Other income/(expense)" line, proportional to its 27 % stake.

Under this method, Microsoft cannot revalue the investment at market price; instead, OpenAI’s quarterly profit or loss directly impacts Microsoft’s reported results.

Consequently, the $115 billion loss reported by OpenAI translates into a $31 billion hit for Microsoft, but this is a strategic subsidy to keep OpenAI’s models under Microsoft’s Azure cloud and Copilot products.

Is an IPO Viable for OpenAI?

Critics point out the apparent $110 billion loss versus OpenAI’s claim of a $1 trillion valuation, suggesting the company may be inflating its worth.

However, OpenAI’s revenue has reportedly doubled in the first seven months of the year, reaching $12 billion ARR, implying roughly $1 billion monthly income from subscriptions and API usage.

Much of the reported loss likely reflects heavy R&D spending to maintain state‑of‑the‑art models, not a cash‑flow crisis.

The Bigger AI Industry Context

All major AI labs (Google, Anthropic, xAI) face a “prisoner’s dilemma”: massive R&D spending is required to stay ahead, and open‑source competition can quickly erode market share.

OpenAI’s large Azure spend will flow back to Microsoft, reinforcing the strategic partnership.

In summary, Microsoft’s reported loss does not indicate a problem with OpenAI; it reflects a deliberate subsidy to ensure Microsoft’s Copilot accesses the strongest AI models, while the AI industry as a whole continues to pour money into R&D to stay competitive.