SpaceX and Tesla confirmed on Thursday that they will build Terafab, a vertically integrated semiconductor complex in Grimes County, Texas — an hour northwest of Houston, and roughly a day's drive from Monterrey. The initial phase carries a $16.8 billion price tag and 3,000 jobs. If every phase gets built, the county's own filings put the total at up to $119 billion.
The pitch is that Terafab does everything under one roof: logic wafers, memory, advanced packaging and testing on a site the companies describe as 100 million square feet. Musk's stated goal is to close the gap between Tesla and SpaceX's own compute needs — Optimus, Cybercab, Starlink, orbital data centers — and what the global chip industry can currently supply.
Governor Greg Abbott put a $30 million Texas Enterprise Fund grant on top of Grimes County's tax abatement and school-district incentive package. Water for cooling will come from the Gibbons Creek Reservoir, not local groundwater.
Why Monterrey should care
This is not a plant that lands in Nuevo León. But every large fab announcement in Texas resets the map for suppliers on the Mexican side of the border, and Nuevo León has been quietly positioning itself for exactly this moment.
A 2024 FUMEC roadmap, cited by El Economista, identified 41 companies already inside the North American semiconductor supply chain from Nuevo León — including Sanmina, Celestica, Jabil, Lenovo and Quanta Computer, which today supplies chips for Tesla vehicles out of the state. State officials, going back to Iván Rivas at the Secretaría de Economía, have been open that Mexico is not going to fab wafers any time soon — but final test, assembly and packaging (ATP) is the piece of the chain that fits the state's existing electronics manufacturing base.
The other adjacency is downstream demand. Tesla already has roughly 120 suppliers in the northern border corridor feeding Giga Texas. A fab that runs at a terawatt of annual compute needs an ecosystem around it — cooling equipment, precision machining, contract electronics manufacturing, logistics — most of which Monterrey already builds.
The catch
Two things temper the enthusiasm. Terafab is a Musk project, which means the timelines and the phasing are governed by his companies' cash and priorities — Grimes County's own paperwork moved from an initial $55B commitment in May filings to a first-phase $16.8B in the August confirmation, with the larger $119B number contingent on later phases that have no schedule.
The second is trade. Since July 1 the U.S. has been operating without a renewed USMCA and with a 10% tariff on a slice of Mexican imports. Any Nuevo León bet on being Terafab's ATP hinterland runs through Laredo, and Laredo's rules are being rewritten in real time.
What we're watching
- Whether Intel — which said in April it would help design and package Terafab chips — routes any of its Mexican operations into the project.
- Whether any of the four names Iván Rivas has been courting (Foxconn, Pegatron, Quanta, Samsung) uses the Terafab timeline to greenlight an ATP line in Nuevo León.
- Construction start at Grimes County, expected in the coming months. First shovels there will pull specialty subcontractors from all over the Gulf, including Monterrey.