UI Residential Default Service Rate Increasing 17%, Small Commercial Increasing 14%

November 14, 2025

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Copyright 2025 EnergyChoiceMatters.com
Reporting by Paul Ring • ring@energychoicematters.com

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United Illuminating has filed new default service rates with the Connecticut PURA for the period beginning January 1, 2026

The January 1, 2026 to June 30, 2026 UI residential (Rate R) Standard Service rate will be 13.6950¢/kWh, which is 17% higher than the current UI Rate R rate of about 11.68¢/kWh.

All of the Standard Service rates in this story include the Bypassable FMCC which will remain 0.0000¢/kWh

The UI Rate GS Standard Service rate will increase to 13.3666¢/kWh on January 1, 2026, which is about 14% higher than the current rate of about 11.73¢/kWh

New Standard Service rates for January 2026 through June 2026 are as follows, in cents per kWh (for Rates LPT & GST, Standard Service rates are only applicable for customers under 500 kW).

UI Jan-Jun 2026 Standard Service Rates (¢/kWh)
** Rates include Bypassable FMCC **

Rate R:        13.6950
 
Rate RT
  On-Peak:     16.2618
  Off-Peak:    12.7618
 
Rate GS:       13.3666
 
Rate GST
  On-Peak:     15.3890
  Off-Peak:    12.3890
 
Rate LPT
  On-Peak:     15.3648
  Off-Peak     12.3648
 
Rate M:        13.9446
 
Rate U:        13.9446

The UI Last Resort Service Generation Services Charge (GSC) rates for the three-month period beginning January 1, 2026 are as follows, in cents per kWh:

Rates GST & LPT* (Above 500 kW) GSCs
 
Jan
  On-Peak:     20.3279
  Off-Peak:    20.5389 [sic]
Feb 
  On-Peak:     18.6009
  Off-Peak:    19.2719 [sic]
Mar 
  On-Peak:     12.9389
  Off-Peak:    13.9539 [sic]
 
*Rate LPT Shoulder & Off-peak price is the same

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