TSMC builds fabs without waiting for customer contracts: it did for Apple, this time it might be Musk
TSMC built Apple a fab before Apple had signed; this time, Musk's still-forming Terafab project could push TSMC to bet early on Texas, locking in this customer ahead of Samsung and Intel.
The argument · tap a timestamp to hear it
TSMC's first question for a new fab: is there a major customer?
Tim Culpan first reported TSMC might use Musk's Terafab as an anchor customer for Texas. The author agrees with the logic: TSMC has never built a fab without a nearby major customer, and Terafab's planned ‘terawatt-scale’ AI chip capacity is ambitious enough to qualify. Musk himself gave an equivocal response on X when asked, neither confirming nor denying.
Most likely structure: TSMC owns it, Musk makes commitments
One probable arrangement: TSMC owns the Texas fab; Terafab participates as an ‘anchor customer’ through equity stakes and/or purchase commitments, similar to Tesla's $16.5 billion supply chain agreement with Samsung. The author expects Terafab to prioritize memory chips and is unlikely to tackle logic chips simultaneously, so TSMC's Texas fab likely handles logic and packaging—both complementing each other as the most plausible outcome.
A new fab's anchor customer must make staggering purchase commitments
Rumors peg the Texas investment at equal to or exceeding Arizona, where TSMC has committed $265 billion over 10 phases. Using 50% capital returns, the author estimates a Texas fab must generate $400 billion in lifetime revenue, with anchor customers potentially covering 20-30% of that—enormous sums for Tesla/SpaceX unless they also self-produce datacenter chips alongside automotive and robotics chips.
An alternative: Sony and TSMC's AVSMC partnership model
Another structure: Terafab/Tesla/SpaceX owns it; TSMC takes a stake and supplies technology, like Sony's image-sensor joint venture AVSMC with TSMC, where Sony brought customer demand and core expertise but holds only 37.8%, letting TSMC operate while Sony stays asset-light and competes with Samsung for Apple orders. The author questions the analogy: TSMC does not make standalone memory chips—that expertise belongs to Samsung or SK Hynix.
Musk's semiconductor ambitions may not require TSMC at all
Musk is known for vertical integration and redesigning manufacturing from first principles, taking risks TSMC will not—witness the Free Electron Laser concepts in Terafab's renderings, something TSMC would likely never pioneer. If that is Musk's path, the author argues, a TSMC partnership could be a distraction, importing the incumbent thinking he wants to escape.
TSMC's logic: build the fab before the customer signs—it did for Apple
For TSMC, landing Terafab means stealing wafer demand from Samsung or Intel—Terafab-Intel cooperation rumors circulated heavily just months ago. The author cites history: Morris Chang built Apple a fab before Apple signed a contract. TSMC's current leadership might equally bet on Musk.
Texas offers clear advantages and equally concrete risks
Texas already hosts AMD, Texas Instruments, IBM, and NXP forming a supply chain ecosystem; imposes no state income tax; has UT Austin, Texas A&M, and Rice supplying electrical engineers; and lacks state-level NEPA-style environmental review—friendlier than TSMC's Phoenix experience with safety violations, discrimination claims, and union friction. Yet risks are concrete: AI data centers are already draining Texas water and power; Governor Abbott has paused new data centers; residents may resist ‘foreign companies building massive factories in our backyard.’
Next year could be TSMC's first: overseas capex exceeding Taiwan
Taiwan still accounts for roughly 85-90% of TSMC's advanced-process capacity (traceable from TSMC ESG reports: Taiwan consumes 85% of fab water, 90% of fab power). But TSMC recently engaged Singapore officials; Singapore has reserved large tracts in Tanjong Pagar. If Texas plus Arizona combined capex hits $400-500 billion over 8-10 years, and 2026 guidance is already $60-64 billion (up 50% from 2025's $40 billion), a 2027 jump to $90-100 billion could mark TSMC's first year of overseas capex exceeding Taiwan—even as expansion continues in Hsinchu and Kaohsiung.
Nothing is finalized yet, but the author bets it happens anyway
The board has not approved the Texas fab; Bloomberg notes the deal hinges on Congress extending the 2022 CHIPS Act's advanced-manufacturing tax credits, set to expire this year—so far, it has not happened. Yet the author's instinct says TSMC will proceed—the rumors are too thick, landing a customer like Terafab is rare, and the AI market shows no sign of cooling.
In their own words · checked verbatim
Just discussions, but something may come of it
Elon Musk0:00
Elon has said that Tesla and SpaceX will buy every chip that TSMC, Samsung, and Micron makes for them, but even so, he still needs to build Terafab.
They want to build a terawatt of AI chips.
I would imagine that TSMC wants an appreciable return on that invested capital, like maybe 50%?
Elon is like, FEL for the win.
Morris built a fab for Apple. Committed to it before Apple even signed.
The silicon road will still run through the new bamboo city.
inject me with truth serum and I think TSMC Texas moves forward.
Figures
| TSMC Arizona cumulative committed investment | $265 billion (8-10 years, 10 phases) | 2:05 |
| TSMC Arizona new investment July 2026 | $100 billion (four new phases) | 2:05 |
| Texas fab projected lifetime revenue needed | $400 billion (at 50% capital return rate) | 2:05 |
| Tesla-Samsung supply chain agreement | $16.5 billion | 1:03 |
| AVSMC project total investment and TSMC stake | $6 billion project, TSMC stake 37.8% | 3:10 |
| Texas plus Arizona combined capex projection | $400-500 billion (8-10 years) | 11:28 |
| TSMC US revenue share H1 2026 | 75% | 11:28 |
| TSMC advanced-process capacity in Taiwan | ~85-90% | 9:23 |
| TSMC fab water and electricity consumption in Taiwan | 85% water, 90% electricity | 10:26 |
Glossary
- Terafab
- Musk's planned AI chip megafab, targeting terawatt-scale production capacity.
- AVSMC (Advanced Vision Semiconductor Manufacturing Company)
- Joint venture between Sony and TSMC in Kumamoto producing image sensors.
- anchor customer
- A major customer providing early purchase commitments that underpin a new fab's financial viability.
- fab-lite
- A business model in which a company outsources or joint-ventures chip production instead of building full in-house capacity.
- FEL (Free Electron Laser)
- Advanced photon source technology appearing in Terafab's conceptual renderings.
- NEPA (National Environmental Policy Act)
- U.S. law mandating federal environmental assessment and review for major projects.
How to listen
Investors and engineers tracking semiconductor supply chains, chip stocks, or Tesla/SpaceX developments; anyone wanting to forecast TSMC's capital spending direction early.
Around 7:20, the segment on Texas universities and talent pipeline contains little new information and can be skipped.