Data Centers and Your Ohio Electric Bill: tariffs, BTCR, and the PJM capacity squeeze

The headline: your bill went up about $7.90 in April

On April 1, 2026, AEP Ohio's Basic Transmission Cost Rider (BTCR) increased by approximately 0.79 cents per kilowatt-hour, moving the transmission rate from roughly 3.6 cents to 4.3 cents. For a typical AEP Ohio residential household, this represents about a $7.90 monthly increase, or roughly 5% of the total monthly bill.

The BTCR is a non-bypassable charge, meaning every AEP Ohio customer pays it regardless of whether they buy generation supply from AEP or from a competitive retail provider. The increase recovers AEP's costs for transmission upgrades to the high-voltage grid — including the upgrades being driven by data-center load growth in central Ohio.

How data centers create transmission costs

A typical hyperscale data center draws 100–500 megawatts of continuous load. AEP Ohio's grid was sized for residential, commercial, and traditional industrial load. Adding hyperscale-class data centers in Licking County, Franklin County, Union County (Marysville), and Butler County requires:

• New high-voltage transmission lines to bring power from the regional grid into the data-center cluster.
• New substations to step the voltage down for distribution to the facility.
• Capacity reservations in the regional electricity market (PJM Interconnection) to ensure power is available during peak demand.
• Generation commitments — either new gas plants, renewable capacity, or behind-the-meter installations like the proposed Hilliard fuel cells.

Without specific cost-allocation rules, all of these costs get spread across all ratepayers. AEP Ohio's Vice President of Customer Services has confirmed in past testimony that without the data-center tariff, residential bills would be substantially higher because of data-center-driven transmission upgrades.

The AEP Ohio data center tariff (effective July 23, 2025)

On July 9, 2025, the Public Utilities Commission of Ohio (PUCO) approved AEP Ohio's data center tariff in a unanimous order, with formal compliance effective July 23, 2025. Under the tariff:

• New data center customers with peak loads above 25 megawatts must pay for at least 85% of their subscribed monthly capacity, regardless of actual use, for up to 12 years.
• A 4-year ramp-up period applies, during which the minimum percentage starts lower and rises gradually.
• An exit fee equal to three years' minimum charges applies if a customer terminates before the end of the contract.
• Customers must provide financial assurances proving they can meet the obligation.
• Mobile data centers above 1 megawatt are also subject to the tariff.

This is the single most important regulatory development for Ohio residential ratepayers in the data-center context. Under cost-causation principles, it forces hyperscale operators (Amazon, Google, Meta, Microsoft, Cologix) to pay for the infrastructure their projects require — rather than spreading those costs across all of AEP Ohio's 1.5 million customers.

The Ohio Manufacturers' Association appeal

The Ohio Manufacturers' Association (OMA) filed an appeal to the Ohio Supreme Court in November 2025 challenging the tariff. The OMA argues the tariff is “unduly discriminatory” because it singles out a specific class of customer for higher cost obligations. AEP Ohio and the Ohio Consumers' Counsel both argue that the tariff is consistent with the foundational regulatory principle that cost-causers should pay cost-recovery. The case is pending. If the Ohio Supreme Court overturns the tariff, the cost-shift to residential ratepayers could be significant.

HB 706 and the proposal to extend the tariff statewide

The AEP Ohio tariff applies only within AEP Ohio's service territory (Columbus, Canton, Chillicothe, Newark, and surrounding rural counties). Customers of Duke Energy Ohio (Cincinnati metro), AES Ohio (Dayton metro), and FirstEnergy (Cleveland, Akron, Toledo, Youngstown) are not protected by the tariff — meaning data centers in those territories can still create cost-shifting pressure.

Ohio HB 706, currently in committee, would extend the AEP-style 85% data center tariff statewide. Until and unless HB 706 passes, residents in non-AEP territory should expect that data center transmission costs will appear on their bills through utility-specific cost recovery mechanisms.

The PJM capacity auction effect

Layered on top of the BTCR is the PJM Interconnection capacity auction. PJM is the regional electricity market spanning Ohio and 12 other states; it sets the price utilities pay to ensure power is available during peak demand. The 2024 PJM capacity auction (covering June 2025 through May 2026) cleared at prices 833% higher than the prior period — a historic spike driven primarily by data center load growth and the retirement of aging coal plants without replacement capacity.

For Ohio residential customers, this translates to roughly 10–15% bill increases during the June 2025 to May 2026 capacity year, equivalent to about 2 cents per kWh. Businesses face up to a 29% increase. PJM has set new market caps for future auctions to limit further spikes, but capacity costs are not expected to return to 2024 levels.

Behind-the-meter generation: HB 15 and the Hilliard fuel cell

Ohio's HB 15, passed in 2025, authorizes behind-the-meter on-site power generation for data centers, allowing them to install gas-fired or fuel-cell generation directly at the site without going through the regional grid. AEP Ohio and Amazon are using this provision in Hilliard (Franklin County) for a 73-megawatt Bloom Energy fuel-cell array — what would be the largest fuel-cell installation in North America. Behind-the-meter generation reduces the strain on AEP Ohio's transmission grid (which is good for residential ratepayers) but creates separate air-quality concerns under the Ohio EPA's air permit process (which is bad for nearby residents).

What you can actually do

If you are an AEP Ohio customer, the BTCR increase is non-bypassable. You cannot opt out of it by switching suppliers. You can, however:

• Shop for a fixed-rate competitive supplier for the generation portion of your bill, which is bypassable.
• Reduce usage during peak demand hours (5–7 PM in summer), since your individual capacity tag for next year is set by your usage on the 5 highest system-demand days.
• Apply for HEAP, PIPP Plus, or Emergency HEAP through the Ohio Department of Development if rate increases are creating hardship (1-800-282-0880).
• Submit testimony at PUCO public hearings when AEP Ohio files for further rate increases. Galloway resident Kia House's testimony at the December 4, 2025 PUCO hearing is part of the public record.
• Sign the Ohio constitutional amendment petition to ban data centers above 25 MW — the most aggressive policy lever available.

• PUCO Order, July 9, 2025 — AEP Ohio Data Center Tariff (Case 24-508-EL-ATA)
• AEP Ohio — Data Center Tariff (compliance effective July 23, 2025)
• Ohio Capital Journal — Ohio Manufacturers' Association Ohio Supreme Court appeal
• Power Magazine — Regulator Approves AEP Ohio's Landmark Data Center Tariff
• WOSU — AEP Ohio rate hearings, December 4, 2025 (Kia House testimony)
• ElectricityRates.com — AEP Ohio Rate Increase: What to Expect in April 2026
• ElectricityPlans.com — Ohio Electric Rates Increase June 2025 (PJM capacity)
• Office of the Ohio Consumers' Counsel — ratepayer protection filings

• Data center water usage in Ohio — aquifer impact, OEPA NPDES rules, Marysville case
• Data center noise in Ohio — cooling-tower hum, generator testing, decibel limits
• Data centers and your property value — what GMU’s study found, what Mansfield residents say
• Is there a data center near my home? — how to check your Ohio county
• Data center health risks in Ohio — diesel emissions, fuel cells, air quality