Key takeaways

  • PJM’s interim resource adequacy service (IRAS) adds a targeted curtailment step for new large loads that do not bring capacity.
  • A "bring‑your‑own‑capacity" (BYONC) path forces data‑center developers to secure generation or storage before connecting.
  • The operator is accelerating interconnection for state‑backed projects and extending a $325 /MW‑day price collar (with a $175 /MW‑day floor) to steady capacity‑cost signals.
  • Forecasts show summer peak demand rising ~66 GW over the next decade, with up to 70 GW of new large‑load demand projected by 2038.
  • Recent capacity auctions each left shortfalls of about 6.6 GW (2027/2028) and 6.8 GW (2028/2029), together exceeding 13 GW, prompting a 6,831 MW backstop procurement and a 15‑year contract window.

Why PJM’s rules matter now

The eastern U.S. grid operator is confronting a wave of AI‑driven data‑center projects that significantly increase overall load. PJM’s latest filing rewrites the relationship between a new megawatt‑scale customer and the regional reliability framework. Instead of treating every new load as a passive demand that the market automatically backs with capacity, the operator now forces developers to answer two questions before a connection is finalized: (1) does the load bring or contract for new generation, and (2) will it accept a pre‑emptive curtailment step if the system tightens?

The IRAS curtailment layer

Under the proposed interim resource adequacy service, PJM will assign reduction obligations to geographic zones that host new large loads lacking their own capacity. State regulators and electric distributors, not PJM itself, will decide which retail customers shoulder those reductions. The mechanism only kicks in when a real‑time supply shortfall emerges, and the amount of load that can be called on is limited to the uncovered portion of the new large loads. In practice, a data‑center campus could remain fully online during normal operations and be asked to shed a capped share of its demand only during an emergency.

BYONC – turning power procurement into a development milestone

The "bring‑your‑own‑capacity" option lifts the responsibility for securing new generation or storage onto the data‑center developer. Rather than waiting for the regional market to provide capacity, projects can lock in contracts for new resources and align those procurement timelines with site construction. This shift changes the financial risk profile of a data‑center build: a campus that pre‑purchases generation enjoys a more predictable power cost curve, while one that relies on future market capacity faces potential curtailment and higher capacity charges.

Accelerated interconnection and price‑collar stability

To keep pace with the speed at which AI facilities are being built, PJM has opened a temporary expedited interconnection track. The track fast‑tracks up to ten qualifying generation projects per year, each of which must be able to enter service within three years and have explicit state support. At the same time, the operator is extending a capacity‑auction price collar whose ceiling sits near $325 /MW‑day and floor around $175 /MW‑day. The collar is intended to dampen price volatility in the capacity market while preserving enough upside to attract new investment.

How the numbers line up

Delivery yearAuction shortfall (MW)Price‑cap ($/MW‑day)
2027/20286,623$333.44
2028/20296,831.3$325

The shortfalls reflect a gap between the 138,318 MW of unforced capacity procured in the July 2026 auction and the reliability requirement. Even after counting fixed‑resource resources, PJM still fell short by 6,831 MW. The price cap that cleared the 2028/2029 auction matches the ceiling of the extended price collar, reinforcing the operator’s commitment to price predictability.

Forecasts and the scale of the challenge

PJM’s 2026 long‑term forecast projects summer peak demand to climb at an average 3.6 % per year over the next decade, a steep jump from the 0.3 % growth anticipated in 2021. In absolute terms, summer peak is expected to rise by roughly 66 GW in ten years. The operator’s own resource‑adequacy analysis flags large‑load additions of up to 70 GW by 2038, a figure that dwarfs the current shortfall and underscores why the IRAS and BYONC frameworks are being introduced now.

The backstop procurement – a safety net

Recognizing that market‑procured capacity may lag behind load growth, PJM has launched a long‑term backstop procurement to cover the 6,831 MW shortfall identified for the 2028/2029 delivery year. Contracts can run as long as 15 years, providing revenue certainty for developers of new generation, storage, or demand‑side resources. The backstop is a one‑time effort intended to fill the gap before the next capacity auction in December.

Governance and transparency tools

A new Large Load Registry will catalog every existing and future large load, including sites that meet the 50 MW cumulative peak threshold within a one‑mile radius. The registry will be shared with states, utilities and regulators, giving them the data needed to apply IRAS reductions where appropriate. The filing also reaffirms the Ratepayer Protection Pledge, which obligates new large loads to “build, bring, or buy the new generation resources and electricity needed… paying the full cost of those resources,” thereby protecting broader ratepayers from price spillovers.

Political backing and the broader grid agenda

The reforms enjoy backing from all 13 governors across PJM’s footprint, the White House National Energy Dominance Council, and the Department of Energy. The joint political support signals that integrating AI‑scale data centers is now a regional priority rather than an isolated technical issue. At the same time, PJM’s five‑year strategy calls for faster generation and transmission development and greater visibility of large loads, though policy gaps remain.

What developers need to watch

  1. Timing: IRAS becomes effective for new loads on June 1 2027. Projects that plan to come online after that date must either secure their own capacity or be prepared for conditional curtailment.
  2. Eligibility for the expedited track: State‑led generation projects must commit to an in‑service date and obtain state siting authority approval.
  3. Capacity market signals: The extended price collar caps the auction price at roughly $325 /MW‑day, providing a ceiling for budgeting new capacity purchases.
  4. Backstop availability: The 6,831 MW backstop procurement offers a fallback but is limited to a one‑time procurement window.
  5. Regulatory deadlines: PJM is asking FERC to green‑light the rule changes by Oct 12, 2026, to have the framework ready before IRAS rolls out.

Outlook

If the projected 70 GW of large‑load demand materializes, the combination of BYONC, the expedited interconnection track, the price collar and the backstop procurement will be critical levers for keeping the PJM system reliable. The IRAS step adds a safety margin that could protect residential consumers from being the first to feel the impact of a supply crunch, while still giving PJM an operational tool to maintain system stability.

Conclusion

PJM’s emerging toolkit reflects a pragmatic response to AI‑driven data‑center growth: shift the onus of capacity acquisition onto the load, give developers a fast‑track path to connect state‑backed generation, and embed a conditional curtailment layer that activates only under real‑time stress. For investors and engineers, the key signals are the quantified shortfalls, the 15‑year backstop window, and the fact that the price collar will stay near $325 /MW‑day. Tracking how quickly new generation projects clear the expedited queue and how many large loads adopt BYONC will indicate whether the grid can stay ahead of the AI compute build‑out.

Sources

This article was researched and fact-checked against the following sources: