---
title: "A tariff Duke is writing in South Carolina decides who pays for AI's power plants"
description: "Duke Energy told South Carolina regulators it will seek the large-load tariff it settled in North Carolina, while two methane plants totaling 2,720 megawatts move through permitting behind it. The rule inside that tariff, more than the turbines, decides whether the AI buildout is billed to the companies that cause it or to millions of households."
publisher: "The Inference"
section: "Power"
published: 2026-10-30T15:37:28.781Z
modified: 2026-10-30T15:37:28.781Z
canonical: https://theinference.org/article/a-tariff-duke-is-writing-in-south-carolina-decides-who-pays-for-ai-s-power-plants
language: en
keywords: "Duke Energy, Data Centers, Utilities, Regulation, North Carolina"
---

# A tariff Duke is writing in South Carolina decides who pays for AI's power plants

> Duke Energy told South Carolina regulators it will seek the large-load tariff it settled in North Carolina, while two methane plants totaling 2,720 megawatts move through permitting behind it. The rule inside that tariff, more than the turbines, decides whether the AI buildout is billed to the companies that cause it or to millions of households.

[Duke Energy](https://theinference.org/markets/companies/duke-energy) [told South Carolina regulators this week](https://www.rtoinsider.com/150058-in-reversal-duke-energy-seek-large-load-tariff-south-carolina/) it will seek a large-load tariff: a standard published rate for very large customers, set by regulators, that any data center can take rather than a contract negotiated one customer at a time.

It is a reversal after years of individual contracts, with "broad agreement" on key principles even as details remain in dispute, while [Dominion Energy](https://theinference.org/markets/companies/dominion-energy), which also serves the state, plans to keep signing bespoke deals [1]. One utility is now writing the rule that decides who pays for the AI buildout, across two states at once.

## The tariff covers wires, and nobody has settled the plants

A data center is a customer no rate class was built for: it arrives huge, and it can leave. [The North Carolina settlement](https://www.unite.ai/duke-energy-nc-public-staff-reach-settlement-on-data-center-costs/), signed by [Amazon](https://theinference.org/markets/companies/amazon), Google, [Meta](https://theinference.org/markets/companies/meta) and [Microsoft](https://theinference.org/markets/companies/microsoft), makes large loads pay upfront for their own substations and post security for shared transmission; [we reported the terms on October 15](https://theinference.org/article/duke-energy-s-data-center-tariff-makes-amazon-and-microsoft-pay-for-wires-not-the-power-plants) [2].

Governor Josh Stein describes the rest of the deal: contracts on a public template, minimum-purchase guarantees, and a duty to cut use when the grid is strained, which lasts only the first five years [3]. The Federal Energy Regulatory Commission [approved the federal transmission layer on October 9](https://theinference.org/article/ferc-accepted-duke-s-15-year-data-center-payment-floor-the-security-behind-it-lasts-90-days), one commissioner calling the protections "meaningful, if imperfect" [4].

## Stein and Jackson want data centers to pay for the plants

Generation is the open link. Stein and Attorney General Jeff Jackson want the loads that force new plants onto the system to pay for them, pointing to what other states extracted from the same companies [3]. "North Carolina should be receiving these same kinds of commitments, but right now we're getting none of them," Stein said [3]. Jackson's objection is narrower: the settlement has large users covering transmission lines, but who pays for power plants is left unclear [3].

*Chart: **Other states won clean-energy megawatts from data-center developers; North Carolina won none** Bar chart comparing megawatts of generation other states won from data-center developers against North Carolina's zero*

*Megawatts each state won from data-center developers, as cited by Governor Josh Stein on October 28, 2026. Source: WRAL. [3]*

## The gas is already in permitting

The bill being written is concrete: Duke filed its pre-construction notice this month, an initial regulatory step, for two methane plants of 1,360 megawatts each on the Yadkin River in Davie County, North Carolina, with gas storage across the river in Davidson County [5] [6]. [The Southern Environmental Law Center has appealed Davie County's view](https://ourdavie.com/2026/10/29/selc-appeals-decision-allowing-duke-plant-without-rezoning/) that the plants are permitted "by right" in a residential-agricultural zone with no public hearing; the hearing is due by November 23 [5]. Davidson County's commissioners vote on their rezoning on November 9 [6].

## If the tariff stops at the wires, households are the backstop

If the tariff stops at wires, the cost of those plants lands on Duke's 8.7 million customers through their rates [7], including the North Carolina households whose [rate case we reported on October 23](https://theinference.org/article/duke-energy-s-north-carolina-rate-ask-is-cut-in-half-a-42-monthly-credit-for-80-000-homes-ends-dec-31). Duke's construction spending already runs well ahead of the cash its operations generate [8]. In Lexington, the Davidson County seat, residents wore "No Gas Plants, No Data Centers" shirts to the planning hearing; Duke says demand is driven mostly by manufacturing and migration, not data centers [6].

*Chart: **Duke's construction spending now outruns the cash its operations generate** Line chart of Duke Energy's quarterly capital expenditure rising above operating cash flow over twelve quarters*

*Quarterly capital expenditure and operating cash flow, US$ billions, from Duke Energy's SEC filings. [8]*

## The dates that decide it land within weeks

Duke reports third-quarter results on November 5 [9], two days after midterms in which voters decide [34 data-center ballot measures across 30 counties](https://www.spglobal.com/market-intelligence/en/news-insights/articles/2026/10/factbox-data-centers-oversight-dominate-us-midterm-election-battles-107415029) [10]. North Carolina's Utilities Commission is expected to rule on the settlement by mid-November [2]; the plants' full certificate application follows early next year, after the state's resource-plan order due by year-end [5]. The settlement covers the wires; extending it to generation is the fight now before the commission.

The South Carolina filing will show which principles Duke treats as settled; the mid-November order will show whether the tariff reaches power plants; the November 23 hearing will show whether the 2,720 megawatts stay on schedule. The buildout should proceed, priced to the customer who causes the cost: that is the counterweight that keeps AI off the backs of households least able to pay.

## Takeaway

Whether Duke's large-load tariff extends from grid wires to power plants decides if data centers or 8.7 million households pay for 2,720 megawatts of new gas; the mid-November North Carolina order settles it.

## Sources

1. [RTO Insider, "In Reversal, Duke Energy to Seek Large Load Tariff for South Carolina," 29 October 2026](https://www.rtoinsider.com/150058-in-reversal-duke-energy-seek-large-load-tariff-south-carolina/)
2. [Unite.AI, "Duke Energy, NC Public Staff Reach Settlement on Data Center Costs," 7 October 2026](https://www.unite.ai/duke-energy-nc-public-staff-reach-settlement-on-data-center-costs/)
3. [WRAL, "Should data centers do more to pay their way? Stein backs new rules on electrical bills," 28 October 2026](https://www.wral.com/news/local/governor-stein-calls-for-tariffs-on-data-center-companies-october-2026/)
4. [Utility Dive via Yahoo Finance, "FERC approves Duke large load transmission rules despite cost-shift concerns," 13 October 2026](https://finance.yahoo.com/energy/articles/ferc-approves-duke-large-load-142049030.html)
5. [Davie County Enterprise Record, "SELC appeals decision allowing Duke plant without rezoning," 29 October 2026](https://ourdavie.com/2026/10/29/selc-appeals-decision-allowing-duke-plant-without-rezoning/)
6. [88.5 WFDD, "Davidson County Planning Board recommends approval of Duke Energy natural gas project," 21 October 2026](https://www.wfdd.org/politics-government/2026-10-21/davidson-county-planning-board-recommends-approval-of-duke-energy-natural-gas-project)
7. [Duke Energy release via Electric Energy Online, "Duke Energy Site Readiness Program drives $773 million in Florida investment," October 2026](https://electricenergyonline.com/article/energy/category/general/90/1226070/duke-energy-site-readiness-program-drives-773-million-in-florida-investment.html)
8. [Duke Energy, quarterly figures from its SEC filings, retrieved 30 October 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001326160)
9. [Kalkine, "Duke Energy (NYSE:DUK) Nears Its November 5 Results With a Large Capital Program in Focus," 29 October 2026](https://kalkine.com/news/utilities/duke-energy-nyseduk-nears-its-november-5-results-with-a-large-capital-program-in-focus)
10. [S&P Global Market Intelligence, "FACTBOX: Data centers, oversight dominate US midterm election battles," October 2026](https://www.spglobal.com/market-intelligence/en/news-insights/articles/2026/10/factbox-data-centers-oversight-dominate-us-midterm-election-battles-107415029)


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A tariff Duke is writing in South Carolina decides who pays for AI's power plants — The Inference. Canonical: https://theinference.org/article/a-tariff-duke-is-writing-in-south-carolina-decides-who-pays-for-ai-s-power-plants