Virginia Regulators Weigh Shifting $1.5 Billion in Dominion Transmission Costs Onto Data Centers, Decision Due August 1
- Policy & Markets Regulatory State & Local Regulation
Marin Holt
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- 7 minutes read
- Transmission costs at issue: $1.5 billion
- Residential bill impact: $0.94 to $2.90 per month
- SCC decision deadline: August 1, 2026
- GS-5 transmission demand charge: 85%
Virginia’s State Corporation Commission (SCC) heard two days of arguments on July 14 and 15, 2026 over whether data center operators should shoulder more of roughly $1.5 billion in Dominion Energy transmission costs, with a binding decision due by August 1, 2026. The dispute centers on Rider T-1, the line-item charge on Virginia electric bills that recovers spending on high-voltage transmission lines. Dominion’s 2024 integrated resource plan named data centers as the single highest driver of new transmission projects across its territory.
Governor Abigail Spanberger’s office, hyperscalers Meta, Google, Amazon and Microsoft, Loudoun County, and consumer advocates each filed positions on how the costs get divided. The governor’s office pressed for a “but for” cost-causation standard: any substation or network upgrade that would not have been built but for a large-load customer should be assigned directly to that customer. Other parties urged contributions in aid of construction, requiring data centers to pay upfront for the transmission work their demand triggers, and a shift to a summer and winter peak-and-average allocation method.
Enforcement Reality
Under the current structure, Rider T-1 spreads transmission costs broadly across rate classes, a design SCC staff attorney Andrew Major described as a “glaring cross-class subsidization” benefiting new large-load customers. The Commission has already begun to narrow that gap: a new GS-5 rate taking effect next year assigns high-load customers an 85% transmission demand charge. The August 1, 2026 ruling will set how much of the $1.5 billion transmission bill data centers absorb directly versus how much lands on households. Dominion first estimated the residential impact at $2.90 per month for a typical 1,000 kWh customer, then revised the figure down to $0.94 per month.
Why It Matters
Virginia hosts the largest concentration of data centers in the world, so the SCC’s cost-allocation choice will serve as a template other states watch as computing load reshapes their grids. A firm “but for” standard would tie transmission spending to the customers that require it and shield residential ratepayers from increases driven by hyperscaler growth. A weaker outcome would keep socializing those costs across all users. Utilities, large-load developers, and regulators from PJM states to Texas face the same question, and the Virginia record will inform how they answer it.
Critical Perspective
The commission has until August 1, 2026 to decide how much of roughly $1.5 billion in Rider T-1 transmission cost data centers absorb directly. Dominion’s own estimate of the residential stake moved from $2.90 to $0.94 per month during the case, and the 85 percent GS-5 demand charge that already narrows the gap applies to high-load customers going forward rather than to the $1.5 billion now in dispute. The Public Utilities Commission of Ohio approved a settled AEP Ohio data center tariff in July 2025 that locked large loads into minimum demand charges over a 12-year term, and hyperscalers contested that structure through the whole proceeding. If the commission adopts a but for standard on August 1, who audits which substation upgrades would not have been built, and how far back does that test reach?
Sources
- Utility Dive: Virginia SCC weighs Dominion data center transmission cost allocation
- Virginia Mercury: SCC considers making data centers shoulder more transmission line costs
- Henrico Citizen: SCC weighs data center transmission cost share
- Inside Climate News: Virginia regulators approve new Dominion rates, assign more costs to data centers
- Southern Environmental Law Center: Dominion customers to see rate increase, SCC steps to ensure data centers pay fair share
