Electricity bills are working their way higher across a swath of the eastern United States after the grid operator PJM Interconnection’s latest capacity auction cleared at its maximum allowed price. PJM itself says the result will translate into a 1.5% to 5% year-over-year increase on retail bills, depending on how each state and utility passes the wholesale cost through to customers. The auction covers the delivery year that began in June 2026 and runs through May 2027, so the increase is not a one-time event but a cost still phasing onto statements across 13 states and the District of Columbia.
What the Auction Actually Set
PJM’s 2026/2027 Base Residual Auction secured 134,311 megawatts of generating capacity and demand response to meet projected electricity needs for more than 67 million people. The price came in at the FERC-approved cap of $329.17 per megawatt-day across nearly the entire PJM footprint, up from $269.92 per megawatt-day in the prior year’s auction.
PJM runs this capacity market to lock in generation supply more than a year ahead of when it is needed, essentially paying power plants to be available. Wholesale capacity charges are only one piece of a customer’s total electricity bill, alongside energy costs, transmission and distribution fees, which is why PJM frames even a record-high capacity price as translating into a comparatively modest 1.5% to 5% retail increase rather than a dollar-for-dollar pass-through.
The region covered spans Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia and West Virginia, plus Washington, D.C. — one of the largest wholesale electricity markets in the country.
Free retirement updates: A quiet rule change can shrink your Social Security or Medicare check, and no one warns you. The free Retirement Shield newsletter catches these early and tells you what to do. Get it free.
Why the Price Hit the Cap
PJM attributes the higher clearing price to two forces pulling in opposite directions: rapidly growing demand, driven largely by data center expansion, and tighter available supply, driven mainly by reliability problems at gas-fired power plants rather than outright plant retirements. The region’s forecasted peak load for this delivery year rose by more than 5,400 megawatts compared with the year before.
The $329.17 figure is not an uncapped market price. It reflects a price cap negotiated as part of a settlement involving Pennsylvania officials, which PJM says kept the clearing price from reaching what could have been closer to $389 per megawatt-day without the cap in place. Advocacy groups including the Natural Resources Defense Council have criticized the result as the second consecutive year of a major price spike for PJM customers, following an increase of roughly 30% tied to the prior year’s auction. The total cost of this year’s auction climbed to $16.1 billion, up 9.5% from $14.7 billion a year earlier, a bill ultimately paid by the same ratepayers across the region.
PJM notes some offsetting movement in the supply picture: this auction’s new generation and uprates of 2,669 megawatts marked the first increase in new capacity commitments in four consecutive auctions, and 17 generating units that had planned to retire withdrew those retirement plans after the prior year’s price signal.
The $329.17 cap and its companion price floor did not come out of PJM’s standard rulemaking process. They trace to a complaint Pennsylvania Gov. Josh Shapiro filed with FERC in December 2024, arguing the auction’s normal pricing formula risked “runaway” costs for the state’s ratepayers. FERC approved a settlement in a 4-0 vote in April 2025 setting a roughly $325 per megawatt-day cap and a $175 floor for two consecutive delivery years, 2026/2027 and 2027/2028 — meaning the same collar already governs next year’s auction as well. Without that settlement, FERC’s decision found, the price cap for this auction alone would have been set closer to $500 per megawatt-day under PJM’s prior formula, with no floor in place at all.
The settlement was not without opposition. PJM’s own independent market monitor and merchant generator LS Power both objected to the price collar, warning that capping prices below what tight supply and demand would otherwise produce could dull the incentive for developers to build new power plants. FERC rejected that argument, pointing to PJM’s own data showing capacity shortage or near-shortage conditions were likely to persist through both delivery years the collar covers, and concluding that the price certainty it offers ratepayers outweighs the risk of the grid paying for more capacity than strictly necessary.
How the Increase Reaches a Household Bill
Because states and utilities pass wholesale capacity costs through on their own schedules, the exact size and timing of the increase varies by service territory rather than landing as a single nationwide adjustment. Two zones, covering the BGE and Dominion service areas, cleared even higher than the regional cap, at $466.35 and $444.26 per megawatt-day respectively, meaning some customers in those areas could see a steeper increase than the 1.5% to 5% regional range.
For a household on a fixed income, even a percentage increase framed as “modest” by the grid operator compounds on top of an electricity bill that has already climbed from the prior year’s auction result, alongside separate increases many utilities apply for transmission upgrades and fuel costs.
How steep that wholesale-to-retail translation can get is visible in the prior cycle. When the 2025/2026 auction cleared near $270 per megawatt-day, up from about $29 the year before, the resulting wholesale cost flowed into pending retail bill increases in the 20% range for some utilities across PJM’s Mid-Atlantic and Midwest footprint, a far bigger jump than the percentage range now being cited for this year’s cap-driven increase. It is a reminder that PJM’s 1.5% to 5% estimate describes a regional average, and any individual utility’s actual pass-through can land well outside that band.
Fixed-income households can typically find the exact capacity-related adjustment on a utility bill’s supply or generation charge line, and many utilities post rate-change notices required under state consumer-protection rules before an adjustment takes effect. PJM’s next capacity auction, covering the following delivery year, was scheduled for December 2025 as the grid operator works to return to a three-year-ahead planning cycle — meaning the price signal shaping bills two years from now was already being set as this year’s increase continues to phase in.
This article was researched and drafted with the assistance of artificial intelligence.
More Financial Reading
