Tariffs for Large Transmission Costs

Summary#

The bill adds a new rule to the Federal Power Act about how to share the costs of very large interstate or offshore electric transmission lines. It lets the project owner file a tariff with the Federal Energy Regulatory Commission (the Commission) to allocate costs across customers in the relevant planning region or regions. The Commission must require that cost shares match, at least roughly, the project’s estimated benefits and consider a wide range of benefits, such as reliability, economics, public policy, and resilience.

• Main change: Creates a formal path for owners/operators of very large transmission lines to file cost‑allocation tariffs with the Commission.
• Which projects qualify: New interstate or offshore lines with capacity of 1,000 megawatts or more, or upgrades that add at least 500 megawatts, if completed on or after the law is passed.
• How costs must be allocated: Allocation must be at least roughly commensurate with the estimated anticipated benefits to customers in the applicable transmission planning region(s).
• Types of benefits to consider: Reliability, economic, public policy, resilience, and other reasonably anticipated benefits.
• Savings clause: The new rule does not limit the Commission’s existing authority to approve cost allocations for other transmission projects.

What it means for you#

• Project owners / developers

  • They can file a tariff with the Commission to propose how costs for qualifying large transmission projects will be shared.
  • This gives a clearer legal route for spreading costs across a region for very large or offshore lines and large upgrades completed after enactment.

• Utilities and grid operators

  • May need to participate in benefit estimates used to set regional cost shares.
  • Could see new cost‑allocation processes when large regional lines are proposed.

• Electricity customers (residential, commercial, industrial)

  • If you are in a transmission planning region affected by a qualifying project, some of the project cost could show up in rates allocated to customers in that region.
  • The bill requires allocations to be tied to estimated benefits, but it does not prescribe exact rate impacts.

• State and local governments

  • The bill does not state changes to state regulatory authority over retail rates or other state roles. It is unclear how state rules will interact with the Commission’s approvals under this section.

• Offshore wind and coastal projects

  • Offshore transmission lines that meet the size thresholds are explicitly covered. This could affect how the costs of large offshore connections are shared regionally.

Expenses#

No publicly available information.

• The bill text does not include a fiscal note or estimate of government spending.
• Possible costs that follow from the bill (not estimated in the text) include Commission staff time to review and approve tariffs, costs to prepare benefit studies, and changes in retail rates for customers in affected regions.
• The bill does not create new fees or explicit federal spending lines.

Proponents' View#

• The bill appears intended to make it easier to set up regional cost sharing for very large interstate and offshore transmission projects.
• Supporters may argue this could help ensure large projects that provide broad benefits (reliability, resilience, public policy goals) can recover costs from the customers who benefit.
• The bill requires cost allocation to be tied to anticipated benefits, which could be seen as applying a cost‑causation principle (those who benefit pay).
• Including public policy and resilience among considered benefits broadens the types of value counted when sharing costs.

Opponents' View#

• One concern is that the bill does not define how to measure or value the listed benefits. Terms like “roughly commensurate” and “reasonably anticipated benefits” are vague.
• It is unclear who decides the boundaries of the “applicable transmission planning region or regions,” which could lead to disputes about which customers pay.
• The process could shift significant costs to customers in a region based on projected, not realized, benefits.
• The bill does not include a fiscal estimate, so the likely administrative cost to the Commission and the cost to prepare benefit studies are not specified.
• The interaction between this federal cost‑allocation authority and state-level rate or siting authority is not spelled out.