Electricity Price History in Connecticut
Connecticut residential electricity averaged 27.37¢/kWh in May 2026. Below is the year-by-year record — the average rate for each year and how much it changed from the year before — followed by what the series does and does not show about Connecticut prices. Data comes from EIA residential retail sales.
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Price Trend
Connecticut electricity rates by year
| Year | Average rate | Change (¢/kWh) | Change (%) | Compared with |
|---|---|---|---|---|
| 2026 (Jan–May) | 29.83 ¢/kWh | −2.08 | −6.5% | Jan–May 2025 (31.91¢) |
| 2025 | 29.59 ¢/kWh | +0.71 | +2.5% | 2024 (28.88¢) |
| 2024 | 28.88 ¢/kWh | −1.30 | −4.3% | 2023 (30.18¢) |
| 2023 | 30.18 ¢/kWh | +5.31 | +21.4% | 2022 (24.87¢) |
| 2022 | 24.87 ¢/kWh | +2.86 | +13.0% | 2021 (22.01¢) |
| 2021 | 22.01 ¢/kWh | −0.82 | −3.6% | 2020 (22.82¢) |
| 2020 | 22.82 ¢/kWh | +0.82 | +3.7% | 2019 (22.00¢) |
| 2019 | 22.00 ¢/kWh | +0.73 | +3.4% | 2018 (21.27¢) |
| 2018 | 21.27 ¢/kWh | +0.92 | +4.5% | 2017 (20.36¢) |
| 2017 | 20.36 ¢/kWh | +0.24 | +1.2% | 2016 (20.12¢) |
| 2016 | 20.12 ¢/kWh | −0.87 | −4.1% | 2015 (20.98¢) |
Yearly figures are the average of the monthly EIA residential rates for that year. A year that is incomplete is labelled with the months it covers, and its change is measured against the same months of the previous year — residential rates are seasonal, so comparing a part-year against a full year would measure the season rather than the trend. Every row carries its own change, including the oldest one shown: its comparison year is the year immediately before the table starts. Where a comparison period is missing entirely, the change columns are left blank rather than filled with a zero.
Why did electricity prices rise in Connecticut?
What the EIA series shows
- Past 12 months (May 2025 → May 2026)
- The Connecticut residential rate fell 13.4% (−4.22¢/kWh), from 31.59¢ in May 2025 to 27.37¢ in May 2026.
- Past 5 years (May 2021 → May 2026)
- The rate rose 23.8% (+5.26¢/kWh), from 22.11¢ in May 2021 to 27.37¢ in May 2026.
- Past 10 years (May 2016 → May 2026)
- The rate rose 26.5% (+5.73¢/kWh), from 21.64¢ in May 2016 to 27.37¢ in May 2026.
- Highest and lowest month on record
- In this series the Connecticut rate peaked at 34.48¢/kWh in April 2023 and bottomed at 10.23¢/kWh in February 2001. The series covers January 2001 to May 2026.
- Steepest 12-month increase
- The largest single-year move in the series ended in July 2023: the rate rose 37.3% (+7.24¢/kWh), from 19.39¢ in July 2022 to 26.63¢ in July 2023. That is when the change happened; the series does not say what caused it.
- Against the rest of the country
- Over the same window the unweighted average across the 51 jurisdictions with data for this period rose 34.4%, so Connecticut's +23.8% lagged the nationwide move by 10.6 percentage points. That gap is the part of the movement this dataset cannot attribute to a nationwide trend — it does not identify what else was involved.
- Rank among jurisdictions (May 2021 → May 2026)
- Measured over that identical five-year window, Connecticut's change is the 37th largest of the 51 jurisdictions whose series covers it — rank 1 is the biggest increase, rank 51 the biggest decrease. The rank places the movement; it does not explain it.
What can move rates in Connecticut — context, not proof
A rate series shows what changed, not why. This dataset records Connecticut's residential rate and nothing about what moved it, and no reviewed Connecticut driver analysis is published yet — so this page makes no causal claim. The factors that generally move retail rates are documented separately.
The categories generally involved are generation mix, fuel costs, transmission and distribution investment, capacity markets, regulatory rate cases, demand growth, and weather-driven peaks. Which of them applies to Connecticut, and by how much, is not something this price series can answer.
Connecticut electricity price drivers · How generation and fuel costs feed into retail rates · How these figures are calculated
More Data & Comparisons
- Electricity inflation in Connecticut — Price growth, trends, rankings
- Electricity cost in Connecticut — Rates, value score, affordability
- Average electricity bill in Connecticut — Monthly and annual bill estimates
- Connecticut electricity rates — Statewide overview and how Connecticut ranks
- Electricity cost calculator for Connecticut — Usage-based estimates
- Full Connecticut knowledge page — Rates, value score, affordability, trends
- All states price history
Frequently Asked Questions
- How much have electricity prices changed in Connecticut?
- Electricity prices in Connecticut have increased 23.8% over the past 5 years. The 1-year decrease is 13.4%. The annualized 5-year increase is approximately 4.4% per year.
- What drove the change in Connecticut electricity prices?
- Measured from EIA residential data, the Connecticut rate rose 23.8% (+5.26¢/kWh), from 22.11¢ in May 2021 to 27.37¢ in May 2026. The series itself does not identify a cause, and no reviewed Connecticut driver analysis is published yet, so no cause is claimed here.
- When were Connecticut electricity rates highest and lowest?
- In EIA residential data covering January 2001 to May 2026, the Connecticut rate was highest at 34.48¢/kWh in April 2023 and lowest at 10.23¢/kWh in February 2001. The most recent reading is 27.37¢/kWh in May 2026.