Skip to content
Tariff data · 2026-08-26
United Illuminating Co · CT

Residential Service Time-of-Use

When does peak hit on United Illuminating Co’s Residential Service Time-of-Use? Peak hits noon–8pm on weekdays, all year.

  • peak49.14¢
  • off-peak24.39¢
Weekdays
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Weekends
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Weekends are off-peak all day — the cheapest time to run anything you can schedule.

What does Residential Service Time-of-Use cost a year?

HouseholdUsesPer yearWorks out to
Apartment

One or two people, no central air, no electric heat

4,866 kWh$1,70235.0¢ / kWh
Family home

Three or four people with central air conditioning

9,453 kWh$3,22334.1¢ / kWh
Home with an EV

Same house, plus an electric car charging overnight

13,103 kWh$4,11431.4¢ / kWh

Estimates, not quotes. We run three made-up but realistic households through this tariff hour by hour for a full year — including the way air conditioning loads the afternoon and an EV loads the small hours. Your own bill depends on when you actually use electricity, which is exactly the thing a per-kWh number hides.

What you actually pay

PeriodRateApplies when
peak49.14¢noon–8pm
off-peak24.39¢8pm–noon, midnight–midnight

Plus a fixed charge of $13.02 per month.

Should you be on Residential Service Time-of-Use?

This is a time-of-use plan, which means the clock decides your bill as much as the meter does. At the worst hour you pay 49.1¢ a kWh; at the best hour, 24.4¢ — 2.0× apart for identical electricity.

That gap is worth real money only if you can move load into it. Every kilowatt-hour a day you shift from noon to midnight is about $90 a year. A dishwasher run is roughly 1.5 kWh; an EV commute charge is 8 to 12. If your day is fixed — you are home in the evening and the air conditioner runs when it runs — a plan like this costs you more, not less.

Before a single kilowatt-hour moves, this plan charges $156 a year in fixed fees. On the apartment above that is 9% of the whole bill; on the house with a car charging in it, 4%. Fixed charges are invisible in a cents-per-kWh comparison and they punish small users hardest — if you use very little electricity, the headline rate is the least important number on this page.

Expect the bill to move with the calendar. The same family home costs about $383 in July and $203 in February — a $180 spread driven by heating and cooling far more than by anything you chose. Budget against the July figure, not the average, and a summer bill stops being a surprise.

How it compares to United Illuminating’s other plans

Measured against the other residential plans this utility files, a family home lands 1st cheapest of 2 — nothing else here beats it for that household.

Against Residential Service, which looks like the plan you land on by default, this one comes out $99 less per year (3%). We infer the default from the tariff structure rather than a flag in the data, so confirm it against your own bill before you switch.

If this is new to you

Where this comes from

Effective
2026-01-01

the date this tariff took effect

Covers
delivery + supply

Distribution charges + Delivery charges (Transmission, Non-Bypassable FMCC, Energy Assistance Costs, Energy Efficiency Programs, Renewable Energy) + Generation charges

Enrollment
open to new customers

Tariff document: https://www.uinet.com/documents/d/uinet/0-1-schedule-of-rates-and-riders