In the United States, a data center may pay for upgrades needed to provide its requested transmission service, while costs for regional projects that benefit multiple customers may be shared under an approved allocation process. There is no single nationwide rule that assigns every upgrade to the data center, its utility, or other ratepayers; the result depends on the service requested, the governing tariff and agreements, and the facilities’ beneficiaries.
Who pays for grid upgrades for a data center?
The answer depends first on what the upgrade is for. A facility built to serve a particular load may be assigned to the customer or transmission customer serving that load under the applicable tariff or a cost-recovery agreement. A larger regional transmission project may instead be planned for several beneficiaries, with costs allocated through the relevant regional process.
That distinction matters for a data center’s electricity bill. Wholesale transmission costs, retail electricity rates, and local distribution charges are governed through different processes. Federal regulators oversee interstate transmission and regional transmission tariffs; state or local regulators generally address retail rates and distribution service. The utility, regional grid operator, and applicable regulators determine how a specific project’s costs flow through to customers.
How can the cost be assigned or shared?
Customer-specific upgrades
If transmission studies identify upgrades required to provide a particular customer’s requested service, the applicable tariff or agreement may make the customer—or the transmission customer serving the load—responsible for those costs. A June 2026 FERC filing discusses cost-recovery agreements intended to ensure that customers taking service for large loads are responsible for the costs incurred to provide that service, including network upgrades.
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Large-load rates or special contracts
A utility’s rate design or an approved special contract can assign some system costs to a large load and address the risk that utility investments become underused if the load falls short of expectations or leaves. The U.S. Department of Energy identifies cost allocation, stranded-asset risk, operational and resource-adequacy concerns, and risk-sharing for emerging technologies as issues in large-load rate design.
Large customers can have different operating needs. Some may seek to match consumption with carbon-free resources; others may use on-site generation to provide capacity. These needs can inform rate design, but a special contract is not automatically available or approved in every service territory.
Regional projects with multiple beneficiaries
When a transmission facility is planned to serve broader regional needs, its costs may be allocated among customers that benefit rather than assigned wholly to one data center. FERC Order No. 1920 establishes a long-term regional planning framework: the fact sheet describes planning at least 20 years ahead, updates at least every five years using at least three scenarios, and cost-allocation processes for selected facilities. It also describes a process for states or interconnection customers to fund some or all of facilities that otherwise would not meet selection criteria.
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A data center can be one of several beneficiaries of a regional project. The actual share depends on the applicable process and how benefits and costs are assessed; the planning framework does not mean every project is shared equally or that a particular load is exempt from paying.
Flexible or interim service
A large load willing to limit withdrawals or accept non-firm service may be considered under a different service arrangement from a customer seeking firm service. FERC’s June 2026 orders identified flexible service as an area for tariff reform. In its PJM co-location fact sheet, FERC describes interim non-firm service while network upgrades needed for requested network service are completed.
Such an arrangement can affect when service is available and the customer’s rights to draw power. It does not, by itself, establish that required upgrades will be free or that the customer avoids their costs.
Co-located generation
A data center located alongside a generator may seek a different transmission arrangement from a conventional load connected directly to the grid. FERC’s PJM fact sheet describes service options that include network integration service, interim non-firm service, and firm or non-firm contract-demand service.
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Co-location changes the service and tariff questions; it is not an automatic exemption from transmission charges, reliability requirements, or upgrade-cost responsibility. The analysis can still involve grid use, generation available to other customers, and how costs are allocated.
What is FERC considering for large loads?
On June 18, 2026, FERC issued tailored show-cause orders to all six regional grid operators under its jurisdiction: PJM, MISO, SPP, CAISO, ISO New England, and NYISO. The orders ask each operator and its transmission owners to justify current tariff arrangements or propose changes on matters including study processes, preventing cost shifting, transparency, co-location, flexible service, and studies for nearby generation and loads.
The release gave the operators and transmission owners 60 days to respond on tariff arrangements and required an informational report within 30 days on generation adequacy for existing and new large loads. Those were deadlines stated in the June 18 release; the release alone does not establish what each operator later filed or what FERC ultimately decided.
Separately, FERC’s RM26-4 docket describes an advance notice of proposed rulemaking process and asks whether large loads should pay the full cost of required upgrades and whether costs might be credited back over time. The docket’s overview generally describes large loads as demand greater than 20 MW. These are questions under consideration, not a settled general rule requiring every data center to pay every upgrade cost.
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FERC has said that “a one-size-fits-all solution is not the current most efficient solution” for integrating large energy-intensive loads into the grid. That statement signals a case-specific approach, not a final allocation formula.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare connection options
Before comparing a standard grid connection, co-location, or flexible service, identify the specific service being offered and the obligations attached to it. The relevant questions are:
- Cost allocation: Which facilities are needed for this customer, which serve multiple customers, and how does the governing process measure benefits?
- Cost certainty and risk: What estimates, deposits, security, milestones, and cost-recovery commitments apply? Who bears overruns or the risk of an investment being underused?
- Timing and service rights: Is the service firm, interim non-firm, or subject to curtailment? Which upgrades must be completed before the requested service is available?
- Reliability and resource adequacy: How will grid constraints and the availability of generation for other customers be addressed?
- Jurisdiction and transparency: Which tariff and regulator govern the transmission, retail, and distribution facilities, and can affected customers review the upgrade list and cost estimates?
DOE identifies stranded-asset and cost-shifting risks, while the June 2026 FERC filing discusses searchable public information on network upgrades and their costs. Transparency helps customers and regulators assess whether a proposed allocation matches the facilities and beneficiaries involved.
What to verify for a specific project
A project’s cost responsibility cannot be determined from its location or size alone. Ask the utility, transmission owner, or regional operator for the documents and decisions that govern the proposed service:
- Confirm the service territory and the regulator responsible for the relevant retail and distribution charges.
- Identify the requested load in megawatts and whether the requested service is firm, non-firm, flexible, or supported by co-located generation.
- Review the study results and distinguish customer-specific network upgrades from facilities proposed for regional planning.
- Find the applicable tariff, state commission orders, interconnection agreement, and any cost-recovery agreement.
- Check the agreement’s payment schedule, security, cost-overrun treatment, and provisions for later beneficiaries or credits.
- Verify the current status of relevant FERC proceedings and filings rather than relying on an announced proposal or deadline as though it were a final rule.
The available federal materials describe policy and planning frameworks, not a substantiated nationwide dollar estimate for data-center grid upgrades. Project costs must be established through the applicable studies and agreements.
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