Commercial rate guide for Eversource — Connecticut (formerly CL&P and Yankee Gas), eastern Massachusetts (formerly NSTAR and Boston Edison), New Hampshire
Rate 35 (small commercial) and Rate 37 (medium/large commercial) in CT. Demand-based rates for loads above 200 kW. Time-of-use optional. Gas seasonal rates.
Rising
14.3% combined supply and delivery increase in Connecticut effective January 202
14.3% combined supply and delivery increase in Connecticut effective January 2026; 9.7% increase in Massachusetts effective January 2026
Property managers with Eversource accounts frequently encounter these billing challenges:
Standard service supply rate volatility (changes every 6 months)
Non-bypassable transition charges on competitive supply accounts
Demand charges on Rate 37 with ratchet provisions
Combined heat and power (CHP) interconnection billing complexity
Public benefits charges increasing annually
Businesses can choose their energy supplier in this market.
Electric supply choice available in CT, MA, and NH. Gas choice limited. Delivery regulated. CT has been particularly impacted by high default supply rates.
Multi-year rate plan pending before CT PURA; NH rate case pending before NH PUC
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