The cost of powering America's artificial intelligence buildout slammed into a regulatory ceiling this month, and the bill is landing on household budgets, not just corporate balance sheets. PJM Interconnection, the grid operator for 67 million people, announced its base capacity auction for the 2028-29 delivery year cleared at $325 per megawatt-day, the maximum allowed under its price cap. The clearing price shut out roughly 6.8 gigawatts of capacity during a period when data center demand is the single largest driver of load growth.
Wall Street Flags Unfair Cost Structure
In a July sector report, Moody's Ratings delivered a stark assessment of the market structure. "The current system lacks adequate mechanisms to ensure that the cost of building new supply is borne by the new entrants and instead socializes new build costs across all customers," the agency wrote. Moody's noted that other U.S. power markets require large-load customers to secure direct supply contracts that recoup generation and infrastructure costs, a distinction that leaves PJM's rules out of step with protecting existing ratepayers.
The auction saw only 525 megawatts of new generation clear, half the volume cleared just six months prior. This scarcity comes as PJM logged an all-time peak demand record of 168.2 gigawatts on July 2. Grid monitor Monitoring Analytics attributed $6.3 billion of the $16.4 billion in total capacity charges from this single auction directly to data center consumption, with $29.4 billion attributable over the past four auctions combined.
Without the price cap, PJM's unconstrained simulation showed costs surging to $554.72 per megawatt-day across the region, and spiking to $776.69 in the Chicago-area zone, demonstrating demand stress that spreads far beyond any single state.
PJM has asked the Federal Energy Regulatory Commission for permission to hold an emergency "backstop" capacity auction in September, a rare step acknowledging the normal market is failing to produce adequate supply. The move comes as consumer reports document severe bill spikes, including residential accounts exceeding $280 in a single winter month, and analysts project rate increases of up to 60 percent over the next five years for households and businesses.
The squeeze highlights a fundamental tension in national energy policy: massive new load from American technology firms is requiring grid buildout, but the regulatory model is funneling those capital costs into the pockets of working families rather than the hyperscalers activating the demand. Without structural reform, the AI boom risks becoming a regressive tax on domestic electricity consumers.