United Illuminating provides safe, reliable electric service to customers in the greater New Haven and Bridgeport areas of Connecticut.

Sign in and manage your UI account, and view and pay your bill. Don't have an account? Register here to get started.

Pay your UI bill online by credit card, debit card, or checking / savings account.

Mail a Payment The United Illuminating Company P.O. Box 847818 Boston, MA 02284-7818

Welcome to United Illuminating! Whether you’re a new, returning or current customer, we’re happy to serve you. We work hard to make sure your needs receive the highest priority.

United Illuminating (UI) is a wholly-owned subsidiary of AVANGRID, Inc. View the most current financial information, including quarterly and annual filings at AVANGRID.com.

SupportView customer service phone numbers and other important contact information for residential and business customers.

UI is engaged in the purchase, transmission, distribution and sale of electricity and related services to approximately 338,654 residential, commercial and industrial customers in the …

Find help paying your energy bill from UI. Learn about our low-income discount rate, financial hardship assistance, payment arrangements, and state programs.

View a list of electric outages, summarized for each of the towns we serve in the greater New Haven and Bridgeport, Connecticut areas of our UI service area.