TSMC's second Arizona fab slips to 2027 or 2028

The second fab is the more advanced of the two at the site. It carries the 3nm work TSMC had promised for the US.

US buyers of leading-edge chips get less domestic capacity, and they get it later. TSMC's biggest customers, including Apple, Nvidia and AMD, have lined up for its 2nm output. Until Arizona runs those nodes at volume, that supply stays concentrated in Taiwan. Neither TSMC nor its customers have said how the slip changes allocation or pricing.

The second fab moves to 2027 or 2028

Mark Liu, then TSMC's chairman, told analysts on 18 January that the second fab would not be operational until 2027 or 2028. His remarks followed the company's fourth-quarter 2023 results.

Liu also said the technology for the second fab shell is still under discussion. The answer depends on how much incentive the US government provides. That is a conditional commitment, not a fixed plan. What began as a single $12 billion 5nm site is now a $40 billion project to build two plants for 4nm and 3nm chips. TSMC had already pushed 4nm production there from 2024 to 2025, citing difficulty sourcing talent.

Negotiations over subsidies under the CHIPS and Science Act have proven challenging, according to a Wall Street Journal report cited by DataCenterDynamics. The two sides disagreed over the value of the support. Liu said TSMC was working with the Arizona Building and Construction Trade Council on training for the local workers it had committed to hire.

Why the Arizona numbers are bad

Cost and yield problems at the US site are not new. In the third quarter of 2025, a power outage at a gas supplier caused several hours of downtime at the Arizona site. It scrapped thousands of wafers and cut quarterly profit there by 99%, Digitimes reported.

Industry sources cited by Digitimes blame supply chain issues, talent shortages, equipment maintenance, corporate culture and labor laws. TSMC declined to comment on market rumors ahead of earnings disclosures.

The schedule TSMC is still promising

Publicly, TSMC still describes an aggressive Arizona ramp. The company said it completed construction of Fab 21 phase 2 this year. Equipment installation is due in the third quarter of 2026, with production in 2027, according to a Nikkei report cited by Tom's Hardware. That is several quarters ahead of an original 2028 schedule.

TSMC began building the N2/A16-capable Fab 21 phase 3 in April 2025. C.C. Wei, the chief executive, said on the company's most recent earnings call in October that TSMC is preparing to upgrade faster to N2 in Arizona. He cited strong AI-related demand from customers. TSMC intends Fab 21 phase 3 for 2nm and 1.6nm-class chips.

What the US commitment now looks like

TSMC raised its total US pledge to $265 billion across 12 facilities, adding $100 billion, Wei said at the company's second-quarter 2026 earnings conference in Taipei. Net income for the quarter was NT$706.56 billion ($22 billion), up 77.4% year on year, on revenue of NT$1.27 trillion ($40.2 billion), up 36%.

Digitimes reported in January 2026, citing industry insiders, that TSMC plans to expand the Arizona campus beyond six fabs, with up to 12 fabs in total. Chairman C.C. Wei confirmed acquiring a second land parcel near the new site, aiming for eight total fabs. The July announcement added dedicated CoWoS advanced packaging capacity in Arizona, the 2.5D technology that AI accelerators need to ship. Chips made on 7nm or smaller nodes were 77% of wafer revenue, with 5nm at 33% and 3nm at 30%. High-performance computing, the category that includes AI accelerators, was 66% of quarterly revenue.

Capital expenditure guidance for 2026 rose to $60 billion to $64 billion, from a prior range of $52 billion to $56 billion. TSMC's US-listed shares fell more than 2% on the day of the results. A JPMorgan equity trader attributed the selloff to inflated expectations rather than negative news.

What happens next

TSMC guided third-quarter 2026 revenue of $44.6 billion to $45.8 billion, with an operating margin of 56% to 58%. Full-year 2026 revenue growth is now expected slightly above 40% in US dollar terms, up from previous guidance of more than 30%.

The board approved about $29.4 billion in capital spending on 11 August 2026, mainly to install and upgrade advanced capacity, a company filing shows. Wells Fargo analyst Joe Quatrochi wrote in a client note that a second US campus in Texas would be a logical home for further expansion, Yahoo Finance reported.

When the Arizona fabs run at volume, and how much of that spending lands there, is still unresolved.