TSMC reported consolidated revenue of about NT$586.89 billion for October 2026, up 59.7% from October 2025 and 14.7% from September, according to its monthly revenue report released on 10 November. Revenue for January through October totaled NT$4,485.62 billion, up 43.3% on the same period of 2025.
October alone delivered 34.6% of the midpoint of TSMC’s fourth-quarter revenue guidance, by our arithmetic, converting the US-dollar guide at TSMC’s own assumed rate of NT$31.8 per dollar. One month is a third of a quarter, or 33.3%.
Business Pill · GPUs Explained
An evergreen Business Engineer explainer on GPUs and AI hardware. It teaches the general idea only and does not discuss TSMC’s October revenue.
The key insight: TSMC reported October revenue of about NT$586.89 billion, up 59.7% from a year earlier and the highest month of 2026. By our arithmetic, that one month equals 34.6% of the midpoint of TSMC’s fourth-quarter guidance, converted at TSMC’s own assumed rate of NT$31.8 per US dollar.
October is the highest month in TSMC’s 2026 monthly revenue table. The previous 2026 high was August’s NT$514.81 billion, which our earlier piece called a record; October is 14.0% above it, by our arithmetic. The weakest month this year was February, at NT$317.66 billion.
The 59.7% year-on-year rise is the second fastest in the 2026 table, behind June’s 67.9% and ahead of September’s 54.6% and August’s 53.3%.
The January-to-October total matches the monthly table: the nine published months plus October add up to NT$4,485.62 billion, by our arithmetic. The 59.7% rise implies October 2025 revenue of about NT$367.5 billion.
TSMC consolidated net revenue by month, January-October 2026, NT$ billion, from TSMC’s monthly revenue reports (October report released 10 November 2026). The 34.6% share of the fourth-quarter guidance midpoint is our arithmetic at TSMC’s assumed NT$31.8 per US dollar.
How October Compares With the Q4 Guidance
On 15 October TSMC guided fourth-quarter revenue to between US$52.3 billion and US$54.3 billion, based on an exchange rate assumption of 1 US dollar to 31.8 NT dollars. The midpoint, US$53.3 billion, equals about NT$1,694.94 billion at that rate, by our arithmetic.
October’s NT$586.89 billion is 34.6% of that midpoint, 35.3% of the low end and 34.0% of the high end, by our arithmetic. At TSMC’s assumed rate, October is about US$18.5 billion. That uses the guidance assumption, not the rate actually prevailing in October.
The midpoint leaves NT$1,108.05 billion for November and December combined, an average of about NT$554.0 billion a month, about 5.6% below October, by our arithmetic. The third quarter averaged NT$498.08 billion a month (NT$1.49 trillion for the quarter); October is 17.8% above that average.
Why It Matters
TSMC’s monthly figure is one of the earliest hard reads on AI chip demand each month. In the third-quarter release, CFO Wendell Huang said: “Moving into fourth quarter 2026, we expect our business to be supported by continued strong demand for our leading-edge process technologies, including the steep ramp-up of our 2-nanometer technology.”
As we read it, the monthly figure puts a hard number under the demand TSMC’s CFO described in October: one month in, the company has booked more than a third of its quarterly guide. The report does not say which products or customers drove it.
TSMC CFO Wendell Huang, in the third-quarter release
“Moving into fourth quarter 2026, we expect our business to be supported by continued strong demand for our leading-edge process technologies, including the steep ramp-up of our 2-nanometer technology.”
Three Implications
FOR THE Q4 GUIDE The midpoint of US$53.3 billion leaves about NT$554.0 billion a month for November and December, about 5.6% below October, by our arithmetic.
FOR THE RUN-RATE October is 17.8% above the third quarter’s monthly average of NT$498.08 billion and 14.0% above August, the previous 2026 high, by our arithmetic.
FOR THE YEAR January-to-October revenue totaled NT$4,485.62 billion, up 43.3% on the same period of 2025, according to TSMC.
The framework says: “Allocation power at the foundry is now more consequential than chip design itself.”
As we read it, TSMC’s monthly revenue is the most frequent public read on that foundry layer. The framework predates these figures and does not discuss October’s revenue.
What Is Not Established
The monthly report gives a single consolidated figure. It does not break revenue down by technology node, platform or customer, so it does not show how much of October came from AI accelerators or from 2-nanometer wafers.
TSMC guides in US dollars and reports monthly revenue in NT dollars. The 34.6% share uses TSMC’s own assumed rate of NT$31.8; a different actual exchange rate in the quarter would change the US-dollar comparison. Monthly figures can also be lumpy, as February’s dip shows.
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TSMC’s October revenue of NT$586.89 billion rose 59.7% year on year and set the high for 2026. By our arithmetic, that one month equals 34.6% of the midpoint of TSMC’s fourth-quarter guidance, above the 33.3% share a single month would carry on an even split.
A note on sourcing. October and January-October revenue are from TSMC’s October 2026 revenue report of 10 November 2026; earlier months are from TSMC’s 2026 monthly revenue table; the fourth-quarter guidance, exchange rate assumption and CFO quote are from TSMC’s third-quarter release of 15 October 2026. The shares of guidance, the US-dollar conversion and the comparisons between months are our arithmetic.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
