Planet Money

What AI data centers are doing to your electric bill

December 20, 2025

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  • The massive investment in AI data centers is causing significant increases in residential electricity bills, with the largest portion of the cost hike attributed to failures within the deregulated electricity generation market's capacity pricing structure. 
  • In Ohio, the local electricity distributor (AEP Ohio) implemented specific new rules for data centers to pay a larger share of infrastructure costs, but this only accounts for a minority of the overall price increase experienced by customers like Ken and Carol. 
  • The electricity grid's structure, particularly the capacity market overseen by regional entities like PJM, was not designed to handle the sudden, massive surge in power demand from AI data centers, leading to inflated costs passed on to existing customers. 

Segments

Ohio Resident’s Bill Tracking
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(00:01:18)
  • Key Takeaway: An Ohio resident tracked a near doubling of electricity price per kilowatt-hour from 11 cents in 2020 to 19 cents in 2025.
  • Summary: Ken Apaki, a retired engineer in Ohio, meticulously tracked his household’s electricity usage and costs from July 2020 to 2025 using spreadsheets. His utility provider is AEP Ohio, and the price per kilowatt-hour nearly doubled over this five-year period. Ken theorizes this increase is linked to the rapid construction of data centers in central Ohio.
Data Center Scale and Impact
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(00:04:27)
  • Key Takeaway: Data center construction spending in the US is projected to reach trillions over five years, creating massive new electricity demand.
  • Summary: Data centers have become a major economic factor, with hundreds of billions being spent on their construction. This growth raises critical questions about securing sufficient electricity supply for these power-hungry facilities. The episode aims to trace how this investment affects residential electric bills.
AEP Ohio Distribution Model
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(00:09:51)
  • Key Takeaway: AEP Ohio’s distribution rates are set by the State Utility Commission, requiring permission for increases, primarily based on infrastructure investment.
  • Summary: AEP Ohio is the local electricity distributor, responsible for the ’last mile’ of power delivery, and operates under a state-granted monopoly. Rate increases must be approved by the State Utility Commission, usually to cover infrastructure upgrades. Data centers requesting massive power capacity posed a risk of leaving residential customers to cover stranded infrastructure costs if the data centers failed to materialize or use the power.
New Data Center Rate Rules
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(00:14:20)
  • Key Takeaway: AEP Ohio implemented specific, innovative utility rates requiring data centers to pay up to 85% of requested power and post collateral.
  • Summary: In 2023, AEP Ohio paused new data center sign-ups to develop new rules, which were approved in 2024. These rules mandate data centers pay for the vast majority of requested energy within four years and require millions in collateral. This aims to offset infrastructure build-out costs, limiting residential customer exposure to about 10-20% of Ken and Carol’s observed price increase.
Transmission Grid Costs
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(00:16:08)
  • Key Takeaway: Transmission costs, managed federally, also increase due to data center demand but account for less than 20% of the total bill increase.
  • Summary: Transmission involves the high-voltage grid connecting power plants across states, analogous to expanding the interstate highway system for power. Costs for these upgrades are recouped from all ratepayers across the service area, including those in other states served by the parent company’s transmission network. This segment accounted for less than 20% of the observed increase in Ken and Carol’s bill.
Generation Market Breakdown
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(00:21:39)
  • Key Takeaway: The largest portion of the bill increase stems from the generation market, specifically due to the malfunctioning capacity market structure.
  • Summary: Ohio deregulated its utility system 25 years ago, separating generation, transmission, and distribution, intending to foster competition. Electricity cannot be easily stored, requiring real-time supply matching peak demand, which the market struggles with. The capacity market pays power generators to guarantee availability for future peak demand, but this system broke down under the new data center load.
Capacity Market Failures
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(00:25:42)
  • Key Takeaway: The PJM capacity market saw generation prices increase tenfold, costing local utilities an extra $12 billion, mostly paid to existing power plants.
  • Summary: PJM’s capacity market, designed to incentivize future power plant construction, failed to adapt to the data center demand surge. High prices are not effectively spurring new construction due to one-year price signals, renewable energy limitations, and multi-year delays in obtaining gas turbines and grid connections. Consequently, most of the $12 billion increase is paid to existing generators who would likely have operated anyway.
Conclusion and Outlook
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(00:32:04)
  • Key Takeaway: Ordinary people in regions like PJM are likely subsidizing the wealthiest industry by absorbing costs from a broken electricity market structure.
  • Summary: The primary driver of increased electricity prices for residents like Ken and Carol is the generation market’s capacity pricing mechanism, not distribution or transmission infrastructure costs. The sheer scale of data center demand is stressing the system, making it almost inevitable that residential customers subsidize this industry. The electricity sector is currently chaotic, with regulators reviewing numerous, often conflicting, proposals for fixing the system.