PJM Capacity Costs Drive ComEd Bill Hikes as Grid Demand-Supply Gap Widens

Event summary

  • ComEd customers face $2–$3 monthly bill increases starting June 1, 2026, due to PJM Interconnection capacity auction costs.
  • PJM capacity charges have risen $12/month since 2022, mitigated by Illinois' Carbon Mitigation Credits (CMCs).
  • ComEd expands bill-assistance programs, including the new Low-Income Discount (LID) program, saving customers $29M in Q1 2026.
  • Production Tax Credit (PTC) depletion adds $13/month to bills after a five-month $803M federal tax credit for nuclear plants.
  • ComEd promotes energy efficiency programs, time-of-use rates, and distributed generation rebates to offset rising costs.

The big picture

ComEd's bill hikes reflect broader PJM market dynamics, where rising demand and retiring power plants strain capacity. Illinois' regulatory interventions, like CMCs, temporarily ease costs, but long-term solutions require faster generation deployment. ComEd's expanding customer programs align with Exelon's broader strategy to address affordability amid energy transition pressures.

What we're watching

Grid Reliability
How PJM Interconnection's reforms will accelerate new generation capacity to address demand-supply imbalances.
Regulatory Pressure
Whether Illinois and PJM can sustain efforts to cap and reduce capacity auction prices amid rising demand.
Customer Adoption
The pace at which ComEd customers shift to energy efficiency programs and time-of-use rates to mitigate bill increases.

Related topics

Utilities