Connecticut Energy Costs Explained: What Homeowners Need to Know

Connecticut electricity rates rank among the highest in the continental United States — averaging 28.5 cents per kilowatt-hour, roughly double the national average of 16 cents. Combined with expensive heating fuel and an aging building stock that wastes energy, the typical Connecticut homeowner spends $4,000–$6,000 per year on energy. Understanding why costs are so high, how the rate structure works, and what programs actually reduce bills is essential information for anyone buying a home or managing one in the state.

Connecticut Energy Costs vs. National Average

A Connecticut household using 700 kWh of electricity per month pays roughly $200/month for electricity alone — before heating, which adds another $200–$500/month during winter. On an annual basis, energy costs in Connecticut can equal or exceed property taxes in many towns. This is a housing cost that most out-of-state buyers don’t adequately factor into their affordability calculations. Our affordability calculator helps model total monthly costs including utilities.

Why Connecticut Electricity Is So Expensive

Deregulation That Didn’t Deliver

Connecticut deregulated its electricity market in 1998 with the promise that competition would lower prices. The opposite occurred. The state separated electricity generation from delivery, creating two charge components on every bill — the “generation” charge and the “delivery” charge. Both have increased substantially:

• Generation (supply) charge: Approximately $0.12–$0.14/kWh. This covers the actual electricity, sourced from power plants across New England. Connecticut can choose a third-party supplier through the state’s competitive supply market, but savings are often minimal and temporary
• Delivery charge: Approximately $0.14–$0.16/kWh. This covers transmission lines, distribution infrastructure, and numerous policy surcharges. The delivery charge is set by the utility and approved by the Public Utilities Regulatory Authority (PURA). You cannot avoid the delivery charge regardless of your generation supplier

The delivery charge contains embedded costs for grid modernization, renewable energy mandates, energy efficiency programs (Energize CT), low-income assistance programs, storm restoration reserves, and legacy pension obligations. These policy costs add approximately $0.04–$0.06/kWh to every bill — costs that customers in states with lower regulatory burdens don’t carry.

Transmission Costs

Connecticut generates only about 50% of the electricity it consumes. The rest is imported from other New England states through the regional grid managed by ISO New England. Transmission charges for moving power from distant generation sources to Connecticut are baked into rates and have increased as aging transmission infrastructure requires upgrades.

Limited Competition

Despite deregulation, two utilities dominate Connecticut’s electricity delivery market:

The six towns served by municipal electric utilities — Wallingford, Norwich, Groton, Bozrah, South Norwalk, and Jewett City — pay 25–35% less for electricity than Eversource and UI customers. Municipal utilities aren’t subject to the same regulatory overhead and policy surcharges. For cost-conscious homebuyers, this is a meaningful location advantage.

Understanding Your Electric Bill

A typical Connecticut electric bill contains these components:

Natural Gas Costs

Connecticut natural gas prices run roughly 60% above the national average, driven by limited pipeline capacity into New England. During winter, pipeline congestion can spike wholesale gas prices dramatically — the region’s dependence on gas for both heating and electricity generation creates competing demand.

Eversource Gas and Southern Connecticut Gas (Avangrid subsidiary) serve most residential gas customers. Gas bills in Connecticut include:

• Supply charge: The commodity cost of natural gas, fluctuating with wholesale markets
• Distribution charge: Infrastructure costs for the pipeline network
• Customer charge: Fixed monthly fee of $20–$25 regardless of usage

A typical gas-heated home in Connecticut uses 800–1,100 therms annually, producing annual gas bills of $1,600–$2,400. Gas availability varies — roughly 30% of Connecticut homes don’t have access to natural gas pipelines, particularly in rural Litchfield, Windham, and Tolland counties.

How to Lower Your Energy Costs

Electricity Savings

• Choose a competitive supplier: Connecticut’s retail choice program lets you pick an electricity generation supplier. The state maintains a price comparison at EnergizeCT.com. Savings typically range from 5–15% on the generation portion only (delivery charges remain the same). Watch for variable-rate contracts that may increase after introductory periods
• Time-of-use rates: Eversource offers optional time-of-use plans that charge less during off-peak hours (nights and weekends). If you can shift laundry, dishwashing, and EV charging to off-peak times, savings can reach 10–20%
• Solar panels: Net metering in Connecticut allows homeowners to offset electricity consumption with solar generation. A typical 8 kW residential system ($20,000–$28,000 before incentives) can reduce electricity costs by 60–90%. Federal tax credit (30%) and Connecticut’s Solar Investment Program reduce net cost to $12,000–$18,000. Payback period: 7–10 years
• LED lighting: If you haven’t already, replacing remaining incandescent and CFL bulbs with LEDs saves $50–$100 annually on Connecticut’s high rates
• Energy Star appliances: Connecticut’s high electricity rates make efficient appliances more valuable here than in low-rate states. An Energy Star refrigerator saves $50–$80/year; an efficient clothes dryer saves $40–$60/year

Heating Savings

• Weatherize your home: The Energize CT Home Energy Solutions program provides free air sealing and insulation assessments. Typical savings: 20–35% on heating costs. Our home services guide covers weatherization in detail
• Convert to heat pumps: Cold-climate heat pumps reduce heating costs by 40–60% compared to oil or propane, even at Connecticut’s high electricity rates, because of their 300%+ efficiency. Energize CT rebates ($750/unit) and federal tax credits (30%, up to $2,000) offset installation costs
• Oil buying cooperatives: Organizations like ConnSave negotiate group heating oil rates 10–20 cents below retail, saving $70–$180 per heating season
• Programmable thermostat: Reducing temperature by 3–5 degrees during sleep and work hours saves 8–12% on heating — $200–$400/year in Connecticut

Energize CT Programs

These programs are funded through a Clean Energy Fund surcharge on electric bills — which means Connecticut ratepayers are already paying for them. Using the programs is essentially recovering money you’re already spending. Energize CT programs collectively save participating households $500–$1,500 per year on average.

Energy Costs by Home Type

The difference between an older oil-heated colonial and a modern heat-pump home of similar size can exceed $3,700 per year — that’s $37,000 over a decade. When comparing homes to purchase, energy efficiency should factor into your price-per-month calculation alongside the mortgage, taxes, and insurance. Our mortgage calculator shows the mortgage portion; add energy costs from the table above for a complete picture.

Compare With Other States

Considering other markets? Here’s how other states compare:

• Iowa Home Energy Efficiency: What Homeowners Need to Know in 2026
• Ground Rent in Maryland Explained: What Baltimore Homebuyers Must Know
• Wisconsin Property Tax System Explained: What Homebuyers Need to Know

Frequently Asked Questions

Why is my Eversource bill so much higher than friends in other states?

Connecticut electricity rates of 28–29 cents/kWh are roughly double the national average. The premium comes from deregulation-era market structure, transmission costs for imported power, embedded policy surcharges (renewable mandates, energy efficiency programs, low-income assistance, storm reserves), and limited pipeline capacity that raises gas-fired generation costs. The delivery portion of your bill — which you cannot shop around — contains most of these embedded costs. Switching to a competitive supplier only affects the generation charge, typically saving 5–15% of the total bill.

Should I switch to a competitive electricity supplier?

Maybe. Connecticut allows residential customers to choose their electricity generation supplier through the retail choice program. Savings on the generation portion range from 5–15%, but several cautions apply: introductory rates may increase sharply after the promotional period; variable-rate contracts can spike during winter; and some suppliers have faced complaints for misleading pricing. Compare current offers at EnergizeCT.com, choose fixed-rate contracts with clear terms, and check the supplier’s complaint history with the Attorney General’s office before switching. The delivery charge — roughly half your bill — remains the same regardless of supplier.

Are solar panels worth it in Connecticut?

Connecticut’s high electricity rates actually make solar panels more valuable here than in most states. A typical 8 kW system produces approximately 9,000 kWh/year, offsetting roughly $2,550 annually at current rates. After the 30% federal tax credit and Connecticut’s Solar Investment Program incentives, net system cost runs $12,000–$18,000, producing a payback period of 5–7 years. After payback, the system generates effectively free electricity for its remaining 18–20 year lifespan. Net metering allows you to credit excess generation against future consumption. Solar makes the strongest financial case in Connecticut precisely because rates are so high. Check our refinance calculator to see if rolling solar installation into a refinance makes sense.

What’s the cheapest way to heat a home in Connecticut?

Cold-climate heat pumps offer the lowest annual operating cost at $1,200–$2,000 for a typical home, despite Connecticut’s high electricity rates. Their 300% efficiency means one unit of electricity produces three units of heat. Natural gas is second-cheapest at $1,600–$2,400 annually. Heating oil ($2,800–$3,800) and propane ($2,400–$3,400) are the most expensive common options. Wood and pellet stoves ($1,500–$2,200) offer savings for homeowners willing to handle fuel and maintenance. If you’re buying a home with an expensive heating system, factor conversion costs into your purchase negotiation.

Do any Connecticut towns have cheaper electricity?

Yes. Six towns with municipal electric utilities — Wallingford, Norwich, Groton, Bozrah, South Norwalk (Third Taxing District), and Jewett City — charge 25–35% less than Eversource and United Illuminating. Wallingford’s municipal electric department, for example, charges approximately 18–20 cents/kWh compared to Eversource’s 28–29 cents. This translates to $700–$1,000 per year in savings for a typical household. For energy-cost-conscious buyers, these six towns offer a meaningful financial advantage. The difference is substantial enough to influence home purchasing decisions for budget-focused buyers.

Will Connecticut energy costs go down?

Structural trends suggest rates will remain elevated. Eversource and UI continue to invest in grid modernization and storm hardening, and these capital costs are passed through to ratepayers. Connecticut’s renewable portfolio standard requires increasing percentages of renewable energy, adding procurement costs. Offshore wind contracts (Revolution Wind, Park City Wind) will add both generation capacity and transmission charges to the system. The realistic outlook for Connecticut homeowners is that electricity rates will continue to rise at 2–4% annually, making efficiency investments and solar installations increasingly valuable over time. The best hedge against rising energy costs is reducing consumption through weatherization and switching to high-efficiency systems like heat pumps. Our home services guide covers efficiency upgrades that pay for themselves within 3–7 years.