AES Ohio and data centers

Large-load tariff and rules

Status

Large-load tariff or rules proposed (2026-07-21)

Tariff

AES Ohio Data Center Tariff (part of three-year rate plan settlement)

Docket

Case No. 25-958-EL-AIR, Public Utilities Commission of Ohio

What it says

AES Ohio says an unopposed settlement filed July 2026 with PUCO Staff and 16 parties includes a new Data Center Tariff; PUCO review is pending, with an order expected by year-end. (AES Ohio)

Source excerpt

“Customer protections that ensure data centers will pay for their costs, under a new Data Center Tariff as recommended by the PUCO.”

Rate case: AES Ohio's three-year distribution rate plan settlement (rates through 2029) includes a Data Center Tariff; a PUCO order is expected by the end of 2026. (AES Ohio)

Official forecasts of data center load

• AES Ohio's September 2026 large-load adjustment request to PJM lists nine planned data center sites in the Dayton zone rising to 6,485 MW by 2033. (PJM Interconnection (Load Analysis Subcommittee), 2026-09-21)
  Source excerpt

  “Annual DAY capacity rises from 75 MW in 2027 to 6,485 MW in 2033 and remains level through 2047.”

What sources say about customer bills

Sources warning that other customers’ costs could rise

• PJM independent market monitor (Monitoring Analytics), PJM-wide finding: The PJM market monitor says data center load additions have raised costs that will be paid through May 2028 and may raise transmission, energy and capacity costs for other customers across the PJM region. (Utility Dive, 2026-03-12)
  Source excerpt

  “Large data center load additions have already had a significant and irreversible impact that will be paid through May of 2028 and will have additional significant impacts on other customers as a result of higher transmission costs, higher energy market prices and higher capacity market prices,”

Sources saying customers are protected, or bills are lower than they would be

• AES Ohio: AES Ohio says the settlement's Data Center Tariff is a customer protection ensuring data centers pay for their costs. (AES Ohio, 2026-07-21)
  Source excerpt

  “Customer protections that ensure data centers will pay for their costs, under a new Data Center Tariff as recommended by the PUCO.”

Sources finding both, or saying it depends

• AES Ohio: AES Ohio says that if the settlement is approved, a typical residential customer would see an increase of about $2.43 per month from January 2027 (a general distribution rate increase, not attributed to data centers). (AES Ohio, 2026-07-21)
  Source excerpt

  “A typical residential customer using 1,000 kWh per month would see an increase of about $2.43 per month beginning January 1, 2027.”

• Ohio Manufacturers' Association: The Ohio Manufacturers' Association criticized PUCO staff's recommendation of a data center tariff for AES Ohio as ratemaking by speculation, while staff said the utility should get ahead of the potential problem. (Ohio Manufacturers' Association, 2026-05-29)
  Source excerpt

  “PUCO staff is not responding to an actual crisis in AES territory.”

These are statements by regulators, utilities, advocates and researchers about this utility or its region. They are not a prediction of any customer’s bill, which depends on rates, usage and regulator decisions.

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