TSMC Arizona has completed construction of its second fabrication plant in North Phoenix and entered tool move-in, with volume production of 3-nanometer chips slated to begin in the third quarter of 2027, slightly ahead of the company's earlier schedule, Chairman and CEO C.C. Wei said on the October 15 earnings call.
The milestone caps a year in which the project, now valued at $265 billion, became the largest single foreign direct investment in U.S. history. TSMC's first Arizona fab has been running since 2024 on 4nm technology, so the second plant lifts the site into the advanced-node tier that supplies AI accelerators, high-end mobile chips and networking silicon.
This matters now because TSMC reported third-quarter 2026 revenue of $46.72 billion, up 41.2% from a year earlier, with advanced process technologies accounting for 79% of wafer revenue. The company is spending $60 billion to $64 billion on capital projects in 2026 alone, and demand for AI chips is the stated reason it is accelerating capacity. The Arizona timeline shift is not a sideshow; it is where a large share of that demand is supposed to be met.
What Wei Announced on the Call
Wei told analysts that the second fab is in tool move-in and installation, and that volume production will begin in 3Q'27, slightly ahead of the previous schedule. He did not name a specific date or yield target, and TSMC has not disclosed how many wafers the plant will run per month.
The first Arizona fab continues to produce 4nm chips. The second will run 3nm. A third fab, under construction, will manufacture 2nm chips and is expected to be fully operational before the end of the decade. Early construction has also started on a fourth fab and on TSMC Arizona's first advanced packaging facility.
Wei also said the company is evaluating additional U.S. expansion opportunities, including Texas, but that no final decisions have been announced. That is the only forward-looking site comment he made, and it came with no timeline.
The Numbers Behind the Acceleration
TSMC's third-quarter 2026 results explain why the schedule moved. Revenue reached $46.72 billion, up 16.2% from the second quarter and 41.2% from the third quarter of 2025. Net income was NT$763.06 billion, a 68.7% year-over-year increase. Gross margin was 66.4% and operating margin 58.7%.
Advanced semiconductor technologies, the node tiers now being installed in Arizona, accounted for 79% of total wafer revenue during the quarter. Wendell Huang, TSMC's senior vice president and chief financial officer, attributed the quarter to strong demand for leading-edge process technologies.
For the fourth quarter, TSMC guided revenue of $52.3 billion to $54.3 billion. The company also reaffirmed its 2026 capital spending budget of $60 billion to $64 billion, which it is using to expand manufacturing capacity worldwide.
Wei tied the spending directly to AI. He said demand for AI-related semiconductors remains exceptionally strong and that TSMC is accelerating production capacity in response. The Arizona fab is one of the places that capacity is being added.
Why the Arizona Timeline Matters
The United States has spent years trying to rebuild domestic advanced chipmaking. TSMC's first Arizona fab, which started volume production in 2024 on 4nm, was the proof of concept. The second fab, moving to 3nm in 3Q'27, is the step that puts U.S.-based output in the same node range as the chips powering most current AI accelerators.
That is the part that is not clear yet. Tool installation is underway, but yields, ramp speed and customer allocation for the Arizona 3nm line have not been disclosed. TSMC has not said which customers will take the first wafers, and it has not committed to a date for the third fab's 2nm output beyond "before the end of the decade."
Arizona gains either way. The state already hosts the first fab, and construction continues on the third, fourth and packaging facilities. TSMC's immediate priorities, per Wei, are to bring the second fab online ahead of schedule and advance the additional facilities.
The Competitive Backdrop
TSMC is not building in a vacuum. Intel is ramping its 18A process in Arizona and Ohio, and Samsung is expanding in Texas. Neither has matched TSMC's yield or customer roster at the leading edge, but both are receiving federal support through the CHIPS Act, which means the competitive field in U.S. advanced manufacturing is getting denser, not thinner.
That is part of why the Arizona timeline matters beyond one company's earnings. If TSMC's second fab slips, Intel and Samsung gain room to position themselves as the domestic alternative for customers who want U.S.-based supply. If it holds, TSMC extends a lead that was already wide: the company produced an estimated 90% of the world's most advanced chips before the Arizona expansion, and the second fab deepens that position on U.S. soil.
The packaging plant matters as much as the fabs. Advanced packaging, the step that stacks and connects dies, has been the binding constraint on AI accelerator supply for two years. Building packaging in Arizona, next to the fabs, removes a logistics step and shortens the path from wafer to finished chip. That is the part of the announcement that received less attention but may matter most for delivery timelines.
What to Watch Next
Three things will show whether the acceleration holds. First, whether the second fab hits its 3Q'27 production target, which TSMC set only slightly ahead of its prior schedule. Second, whether the $60 billion to $64 billion capex budget for 2026 carries into 2027 at a similar level, which would signal that the Arizona expansion is not slowing. Third, whether the Texas evaluation becomes a concrete project or stays a discussion.
For now, the company has a first fab running, a second fab installing tools, and two more fabs plus a packaging plant in various stages of construction. That is a different position than a year ago, when the second fab was still a construction site.
Read more about the Arizona expansion at AZ Big Media and see TSMC's broader capacity plans on the Semiconductor Industry Association news page.
For related coverage, see our semiconductors category.