Connecticut moves to strip utilities' bonus transmission profit

✓What's documented Sourced to the June 11 FERC complaint by Connecticut's AG and three state agencies, plus Gov. Lamont's press release.

Connecticut's attorney general and three state agencies asked FERC on June 11 to strip Eversource and Avangrid of the 0.5% return-on-equity bonus they collect for belonging to ISO New England, arguing a 2025 state law now makes that membership mandatory and therefore ineligible for a voluntary-participation incentive. This is the utility-profit end of the affordability fight: the RTO adder is extra guaranteed profit layered onto transmission rates, and states from Ohio to Maryland have already moved to kill it. Gov. Ned Lamont put it plainly, saying utilities with record profits should not get bonus profit for doing what the law already requires.

• The complaint was filed at FERC on June 11, 2026 by the attorney general, the Office of Consumer Counsel, PURA and the state environmental agency.
• A 2025 Connecticut law requires CL&P and United Illuminating to join ISO-NE, which the state says voids their claim to the voluntary 0.5% ROE adder.
• The adder added $17 million to CL&P and UI rates across New England in 2024, with Connecticut ratepayers paying about $4.5 million of that.
• Connecticut had the seventh-highest electricity rates in the US in January 2026, with transmission about 15% of a typical residential bill.
• A 2025 court ruling stripping the adder from Ohio utilities was projected to save AEP customers $220 million through 2031.