Taiwan Semiconductor Manufacturing Company (TSMC), the world’s leading chipmaker, has issued a strong warning to US policymakers that proposed tariffs on semiconductors could jeopardize its massive $165 billion investment in Arizona. TSMC’s Arizona project, already the largest foreign direct investment in a greenfield project in American history, is central to US ambitions to strengthen domestic semiconductor manufacturing and secure the supply chain for advanced technologies.
In a letter to the US Department of Commerce, TSMC emphasized that the success and timely completion of its Arizona expansion depend on continued demand from leading US customers and a stable, tariff-free environment. The company cautioned that tariffs would increase the cost of consumer products, reduce demand for semiconductor components, and ultimately undermine the viability of its Arizona operations.
Unprecedented Investment and Economic Impact:
TSMC’s Arizona initiative represents a commitment to building six advanced semiconductor wafer fabrication facilities, two packaging and testing plants, and an R&D center. The company’s latest expansion, announced in March 2025, adds $100 billion to an existing $65 billion commitment, bringing the total investment to $165 billion. Once fully operational, the Arizona cluster is expected to produce 100,000 wafers per month and account for about 30% of TSMC’s global capacity for cutting-edge 2-nanometer and more advanced chips.
This investment is projected to create 6,000 high-tech jobs at the Arizona site, 40,000 construction jobs over the next four years, and tens of thousands more jobs in the broader supply chain. The economic ripple effect is expected to generate over $200 billion in indirect output across Arizona and the United States over the next decade. TSMC’s US-made chips will power everything from smartphones and AI systems to electric vehicles and aerospace technologies, supporting major American tech companies such as Apple, NVIDIA, AMD, Broadcom, and Qualcomm.
TSMC’s Plea: Avoid Tariffs on Chips and Downstream Products
TSMC’s warning comes amid threats by former US President Donald Trump to impose tariffs of up to 100% on semiconductors imported from Taiwan, claiming the island “stole” the chip business from Washington. The chipmaker argues that such tariffs would not only hurt its business but also disrupt the entire ecosystem supporting US technology innovation. TSMC specifically requested that any new import measures exclude both finished and semi-finished products containing semiconductors, as well as the critical inputs required for chip manufacturing that cannot yet be sourced domestically.
The company stressed that imposing tariffs without realistic adjustment periods would penalize companies that have already invested heavily in US manufacturing. TSMC urged policymakers to ensure tariff-free access to essential materials and equipment from established suppliers, especially as onshoring the entire supply chain will take time and significant additional investment.
US Semiconductor Strategy at a Crossroads:
TSMC’s Arizona expansion is a cornerstone of America’s strategy to regain leadership in semiconductor manufacturing, a sector vital for national security and economic competitiveness. The company’s aggressive capital expenditure—expected to reach up to $42 billion in 2025 alone—reflects both the surging demand for advanced chips and the escalating costs of building state-of-the-art fabrication plants. The Arizona project is designed to accelerate the development of a robust US semiconductor ecosystem, fostering innovation and reducing reliance on overseas suppliers.
However, TSMC’s warning highlights a critical tension in US industrial policy: while tariffs are intended to protect domestic industries, they risk undermining the very investments needed to achieve technological self-sufficiency. The outcome of this debate will have far-reaching implications, not just for TSMC and its American partners, but for the future of global technology supply chains.
As policymakers weigh their next steps, the semiconductor industry is watching closely. TSMC’s message is clear: the path to US chip leadership runs through cooperation, open markets, and a stable investment environment—not protectionism that could stall progress on the ground in Arizona.
