The $1.66 billion Texas tax break tied to Elon Musk’s Terafab chip plant is eight school-district deals, according to the Texas Comptroller’s JETI records. TeraFab AI, LLC holds four with Anderson-Shiro CISD and four with Iola ISD in Grimes County, and their estimated school tax benefits add up to $1,660,434,060, by our arithmetic.
That is the figure Governor-elect Gina Hinojosa has pointed to: she “pointed to a $1.66 billion JETI tax break tied to Terafab”, Fortune reported on 5 November. Tesla has a separate application of its own, for a solar cell plant in Fort Bend County, put at $115.2 million.
Business Pill · Capex and Depreciation
An evergreen Business Engineer explainer on capital spending and depreciation in AI hardware. It teaches the general idea only and does not discuss Texas, JETI or Terafab.
The key insight: As we read the record, the $1.66 billion is not one grant but eight ten-year school-tax limits, and most of it depends on construction that has not started: 87.2% sits in Phases 2 to 4, which the applications date from 2029 to 2036, by our arithmetic. Each estimate was made before construction, and the benefit tracks the appraised value of what is built.
Update, 11 Nov. Musk-run companies like SpaceX and Tesla “have flourished in the state thanks to white-glove treatment from elected officials—mainly Republicans—including tax incentives, infrastructure benefits, and legislation that makes it difficult to sue his companies,” The Wall Street Journal reported in an article dated 6 November. “That is about to change, Texas Democrats who spoke to The Wall Street Journal said,” according to the article, which opens: “Elon Musk made a $225 million bet on Texas. Now, a new wave of Democratic leaders has the power to stall his projects.” We could read only the article’s opening; the rest is behind the Journal’s paywall. Source: The Wall Street Journal.
JETI is the state’s Jobs, Energy, Technology and Innovation program under Chapter 403 of the Government Code. Each of the eight Comptroller recommendation letters, all dated June 15, 2026 and addressed to Space Exploration Technologies Corp, covers a limit on “the taxable value for maintenance and operations ad valorem tax” of the plant’s property.
Each deal halves the taxable value for school maintenance and operations taxes for ten years: every summary lists a limitation percent of 50%. The project is classed as “Semiconductor and Related Device Manufacturing (NAICS Code 334413)”. Each application lists a minimum of 10 required jobs and a minimum wage of $66,668.
The Comptroller’s open data now lists an agreement for all eight, posted on 21 and 25 August 2026. The letters say the project showed that “in the absence of the agreement, the applicant would not make the proposed investment in this state”.
Estimated school maintenance and operations tax benefit for each JETI phase of TeraFab AI, LLC in Grimes County, Anderson-Shiro CISD and Iola ISD combined, with each bar spanning its ten-year incentive period, and Tesla’s separate Fort Bend application. Source: Texas Comptroller recommendation letters. Phase sums, the $1.66 billion total and the 87% share are our arithmetic.
Where the $1.66 Billion Sits
The deals run in four phases. Phase 1, with construction from 2026 to 2028 and tax years 2029 to 2038, carries $212.1 million of the estimated benefit across both districts, by our arithmetic. Phases 2 and 3 carry $548.7 million each, and Phase 4, with tax years 2037 to 2046, $351.1 million.
So 87.2% of the $1.66 billion, or $1.45 billion, sits in Phases 2 to 4, whose construction the applications date from 2029 to 2036, by our arithmetic. By district, Anderson-Shiro CISD’s four deals come to $1.02 billion and Iola ISD’s four to $644.1 million. Our earlier piece on Terafab’s planned size covers the plant itself.
The benefit is the Comptroller’s estimate of school taxes not levied: the eight summaries put the levy without the limit at $3.91 billion in total, by our arithmetic. Each summary also lists a performance bond; Phase 1 at Anderson-Shiro CISD carries $12,979,708.
Tesla’s Own Application
Tesla, Inc. filed JETI application J0050 with Lamar CISD, posted on 6 August. It says Tesla “is currently evaluating the development of a solar cell manufacturing facility located in Fort Bend County, Texas”. Its investment schedule totals $10,116,100,000 over 2026 to 2028, with 75 required jobs.
The Comptroller’s recommendation, posted on 31 August, puts the estimated school tax benefit at $115,242,835 for tax years 2029 to 2038, about 1.1% of the planned investment, by our arithmetic. The open-data table lists no agreement for it yet. The application says “there is another viable site that Tesla is also evaluating for final site selection”.
The Political Context
Fortune reported that Hinojosa unseated three-term Governor Greg Abbott and had sued for access to Abbott’s communications with Musk before she won. She takes office on 19 January, the Texas Tribune reported. Our earlier pieces cover her stance on Musk’s companies and her plan to end a data center tax break.
A post on X on 11 November described a document said to show a petition by Musk to Hinojosa and the Texas Secretary of State over these incentives. We could not verify it: by about 19:35 UTC we found no record or report of such a petition from the Secretary of State, Musk, his companies or major news outlets.
The Structural Read
As we read the scale, the Comptroller’s figures put $3.91 billion of school maintenance and operations levy on the eight Terafab phases without the limit, and the 50% limitation is worth $1.66 billion of that, by our arithmetic.
As we read Tesla’s file, its Fort Bend solar cell project is a separate application with its own Comptroller recommendation and no agreement listed yet; the application says Tesla is weighing another site.
Texas Comptroller of Public Accounts, recommendation letters J0035 to J0042, 15 June 2026
“Based on the above findings, the Comptroller recommends the application for approval of an agreement to limit the taxable value for maintenance and operations ad valorem tax of the eligible property used as a part of the eligible project that is the subject of the application.”
Three Implications
FOR THE SCHOOL DISTRICTS Each Terafab summary lists the estimated levy with and without the limit, and a performance bond; Phase 1 at Anderson-Shiro CISD lists a $12,979,708 bond.
FOR TESLA The Comptroller’s recommendation for J0050 puts the estimated benefit at $115,242,835, and the open-data table lists no agreement for it yet.
FOR THE INCOMING ADMINISTRATION Fortune reported that Hinojosa pointed to the $1.66 billion figure; all eight Terafab agreements are posted on the Comptroller’s site.
The framework records: “the capex race is no longer a corporate spending cycle. It is a sovereign-scale financing problem dressed in tech-company clothing”.
As we read it, the Terafab record shows one public piece of that financing: school-tax limits estimated at $1.66 billion over 2029 to 2046, by our arithmetic, set against a chip plant built in phases. The framework predates these filings and does not discuss Terafab or Texas.
What Is Not Established
The $1.66 billion is an estimate made before construction. The real benefit depends on what is built and on its appraised value, and the later phases depend on construction that the applications date from 2029 to 2036. The figures cover school maintenance and operations taxes only, not county abatements or state grants.
Whether a new governor or Legislature could change agreements already in place is not addressed in these records. We did not contact SpaceX, Tesla or Hinojosa’s office for this piece.
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The Texas Comptroller’s records put the $1.66 billion behind the Terafab debate in eight school-tax deals for TeraFab AI, LLC in Grimes County, $1,660,434,060 in all by our arithmetic, with 87.2% in later phases. Tesla’s own Fort Bend solar cell application adds $115.2 million and has no agreement listed yet.
A note on sourcing. The deal terms, phases, incentive periods and estimated tax benefits are from the Texas Comptroller’s JETI open-data table and the nine recommendation letters (J0035 to J0042 for TeraFab AI, LLC; J0050 for Tesla, Inc.), which we read on 11 November 2026, and from Tesla’s application J0050. Totals, phase sums and shares are our arithmetic. Hinojosa’s reference to the $1.66 billion figure is as reported by Fortune.
A document described on X as a Musk petition could not be verified and is not relied on here. We did not contact SpaceX, Tesla or Hinojosa’s office for this piece.
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.
