SpaceX has filed official government documents proposing $55 billion for the first phase of its Terafab semiconductor facility in Austin, Texas. If all phases are completed, the total investment could reach $119 billion.
The figure is much higher than Wall Street expected. Morgan Stanley had previously estimated the project would cost between $34 billion and $45 billion. The updated numbers were first reported by Bloomberg and confirmed through documents posted on a Texas county website.

Terafab is a joint project between SpaceX and Tesla. The goal is to build enough in-house chip capacity to supply both companies with the semiconductors they need for AI, robotics, and space systems.
Elon Musk first unveiled the Terafab concept in March. He has argued that existing chipmakers are not scaling fast enough to meet demand from next-generation AI systems.
The facility will start as a smaller advanced fabrication unit focused on designing and testing chips. From there, the plan is to scale into a much larger operation over time.
Terafab is designed to produce two categories of chips. The first are lower-power processors for vehicles, robotaxis, and humanoid robots. The second are higher-performance chips built for space-based computing.
Musk has spoken about supporting large-scale computing capacity both on Earth and in orbit, though he has not given a specific timeline for that vision.
Last month, Musk confirmed that Terafab will use Intel’s 14A manufacturing process. He called it “state of the art” during Tesla’s most recent earnings call.
Intel’s involvement in the project had been announced a few weeks before Musk’s comments. Musk praised Intel’s team, including chief executive Lip-Bu Tan.
Some analysts have raised the question of whether the project will need to bring in outside funding, given the scale and complexity of building a chip plant of this size.
On Tesla’s earnings call, Musk said SpaceX would handle the bulk of the early spending. Any financial arrangements between the two companies must be approved by both boards and go through a conflict resolution process.
SpaceX recently acquired Musk’s AI company xAI, ahead of a planned initial public offering later this year. Some analysts have speculated that the Terafab project could eventually lead to a merger between SpaceX and Tesla, though no such plans have been announced.
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