State regulators have moved fast on large-load tariffs this year. As of March, the Smart Electric Power Alliance (SEPA) counted 77 such tariffs and service rules pending or in place across 36 states, with 29 approved in 2025 alone, more than twice the total approved between 2018 and 2024 combined. SEPA's database has since grown past 100 tariffs and service rules. The Edison Electric Institute puts the count at 24 states with at least one large-load tariff approved as of June, with four more pending. The policy goal behind all of them is the same: keep the cost of connecting a data center, factory expansion, or other big new electricity customer from landing on residential bills. For the company on the other side of that tariff, the goal barely matters. What matters is what it signed up for.
What These Tariffs Actually Require
Virginia's approved GS-5 tariff, which Dominion Energy customers drawing 25 megawatts or more will move onto starting January 1, 2027, requires a minimum contract term of 14 years. Customers pay 85% of their contracted distribution and transmission demand and 60% of their contracted generation demand, regardless of actual monthly draw, and must post collateral worth $1.5 million per megawatt of capacity. Oregon's Schedule 96, which took effect for Portland General Electric customers on June 10 under the state's POWER Act, applies a separate rate class to facilities using 20 megawatts or more and ties long-term contracts to emissions and clean-energy requirements. Pennsylvania's model tariff, adopted by the state's Public Utility Commission at the end of April, applies to customers above 50 megawatts individually or 100 megawatts in aggregate and places cost responsibility for new infrastructure on the customer driving it.
Each of these mechanisms was built to solve the same regulatory problem, protecting other ratepayers from a cost shift, but each does it through contract terms that read less like a utility rate schedule and more like a project finance agreement.
Why the Fine Print Functions Like Debt
A 14-year minimum term with a contracted-demand payment floor is a fixed long-term obligation whether or not the underlying business case changes. Collateral requirements sized in the millions of dollars per megawatt tie up capital that could otherwise fund the project itself or sit on the balance sheet for other purposes. Exit penalties attached to early termination convert what looks like an operating cost into a liability that shows up in a due diligence file the same way a lease obligation or a long-term supply contract would. None of that shows up if a facilities team reads the tariff purely as a price per kilowatt-hour, which is how most coverage of the large-load tariff wave has framed it, as a ratepayer politics story rather than a contract the buyer has to live inside for over a decade.
The stakes are rising alongside the commitments. JLL's 2026 Global Data Center Outlook found that speed to power has overtaken cost as the leading site selection factor, and guaranteed delivery is increasingly what buyers are paying for, not the lowest rate on the meter. A large-load tariff is one of the few instruments that can actually guarantee that delivery, which is precisely why regulators are attaching such long commitment periods to it. The certainty a company is buying and the liability it is taking on are the same clause.
What Procurement and Finance Should Model Before Signing
Treat the collateral requirement as a capital allocation decision made at the same time as the project's construction budget, not an afterthought negotiated after the facility is already designed. Run the minimum-term payment obligation through the same stress tests applied to a long-term lease or a take-or-pay supply contract, including a scenario where the facility's actual demand comes in below the contracted level for an extended stretch. And treat the tariff docket itself as a live document. North Carolina's Energy Policy Task Force, which released its interim recommendations in February 2026, is still refining its large-load provisions ahead of a final report due in February 2027, and several other states have proceedings open through the rest of this year. A tariff signed today can still be amended by a docket that closes after the ink is dry, and finance teams that track that process the way they track interest rate exposure will be the ones least surprised by what the next revision brings.
