United Illuminating serves customers in Connecticut. This guide covers current rates, billing structure, common charges, and how to verify your bill is accurate.
Quick Facts
Service Area: Greater New Haven and Bridgeport areas of Connecticut
Rate Range: 11.4¢–32¢/kWh
Standard Rate: ~13.7¢/kWh (Rate R)
Off-Peak Rate: 12.8¢/kWh (Rate RT)
Rates Updated: February 2026
Current Rates
United Illuminating residential rates range from 11.4¢–32¢/kWh depending on your rate plan. The standard Rate R plan has an effective rate of ~13.7¢/kWh. Time-of-use customers on the Rate RT plan pay 12.8¢/kWh off-peak and 16.3¢/kWh during peak hours. Rates last updated February 2026.
Understanding Your Bill
Your United Illuminating bill includes several components: base charges, energy charges, fuel adjustments, taxes, and fees.
What is the average United Illuminating rate per kWh?
United Illuminating residential rates vary by rate plan, usage tier, and season. Your effective rate includes base charges, energy charges, fuel adjustments, and various fees. Use our free Sanity Check tool to see how your rate compares to other United Illuminating customers.
Why is my United Illuminating bill so high?
High United Illuminating bills are often caused by seasonal usage changes, rate increases, estimated meter readings, or being on a suboptimal rate plan. Upload your bill to Utility Check for an independent verification of every line item.
How can I verify my United Illuminating bill is correct?
Upload your United Illuminating bill to Utility Check for independent, line-by-line verification. We recalculate your charges against United Illuminating's published tariffs, check your rate plan, and flag any discrepancies.
Does Utility Check support United Illuminating?
Yes. Utility Check fully supports United Illuminating bill verification. We analyze your rate plan, verify billing math, check fuel adjustments, and compare your effective rate to published tariffs.
Is my United Illuminating bill wrong?
It's hard to tell just by looking at the total. Billing errors, wrong rate plans, and incorrect meter reads happen more often than most people realize. Upload your United Illuminating bill to Utility Check — we compare every line item against the published tariff and tell you exactly whether anything is off.
How do I know if I'm being overcharged by United Illuminating?
Start with our free sanity check at utilitycheck.co/sanity-check to compare your per-kWh rate to the Connecticut average. If your rate seems high, a full bill verification ($19.99) will identify whether you're on the wrong rate plan, being charged incorrect fees, or if your usage pattern is driving up costs.
Can someone check my United Illuminating bill for me?
Yes — that's exactly what Utility Check does. Upload your bill and we independently verify every charge against United Illuminating's current tariff. You'll get a detailed report with findings and step-by-step next steps if any issues are found, or confirmation that your bill is correct.
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