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

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.

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

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.

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 greater New Haven …

Access your account, manage services, and pay bills conveniently through the My Account Portal.

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

Start, stop and transfer your electrical services in greater New Haven and Bridgeport area with UI. Our quick and easy process ensures you can manage your services in just a few steps.

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

Explore ways to pay, receive and manage your UI bill. Pay your bill online or learn about other ways to pay using our mobile app, AutoPay, or pay offline.