Connecticut Business Electricity Rates

Connecticut has been open to retail electric competition since 2000. Every commercial customer of Eversource or United Illuminating can buy electricity from a licensed competitive supplier instead of the utility. And yet a large share of Connecticut businesses have never exercised that choice — which in this state is an unusually expensive decision, because Connecticut's default service for larger commercial accounts is not designed to be a good price.

This guide explains what actually drives a Connecticut commercial electric bill, why the state's rates are structurally high, and where a business genuinely has leverage.

Why Connecticut Electricity Is Expensive

Connecticut's costs are high for reasons that mostly sit above any individual business:

• New England is gas-constrained in winter. ISO-NE relies heavily on natural gas generation, and the pipeline capacity into the region is limited. On the coldest days, gas is diverted to heating and power prices spike. That winter risk is priced into every forward contract in the region, year-round.
• Connecticut sits at the end of the pipe. The state has limited in-state generation relative to its load and depends on transmission and imports, which carries cost.
• Non-bypassable public policy charges are large. A meaningful share of a Connecticut bill funds programs mandated by the legislature — and those charges apply whether you shop or not.

The practical takeaway: the supply portion is where competition operates, and it is where your effort belongs. The delivery and public benefits portions are set by regulation and will be what they are.

Standard Service vs. Last Resort Service — The Part That Costs CT Businesses Money

Connecticut does not have one default rate. It has two, and the difference is where a lot of commercial money is lost:

• Standard Service applies to residential and smaller commercial accounts. It is procured by the utility in advance through regulated solicitations and reset on a set schedule, so it delivers a period of price stability.
• Last Resort Service applies to larger commercial and industrial accounts. It is priced on a much shorter cycle and tracks the market closely — which means a large Connecticut business that never shopped is effectively floating on wholesale prices, including through New England winters.

Last Resort Service is doing exactly what it was designed to do: serve as a backstop, not a bargain. It was never meant to be a durable procurement strategy for a business with real load. If your Connecticut facility is on it, that is the single highest-return thing to change.

What Makes Up a Connecticut Commercial Bill

• Generation / supply. The energy commodity. Shoppable, and the only part where a competitive process changes the number.
• Delivery. Eversource or UI transmission and distribution charges, regulated by PURA. Not shoppable — but rate class selection matters, and mid-size accounts are frequently on the wrong one.
• Capacity and other ISO-NE market costs. Depending on your contract, these are either bundled into your fixed rate or passed through. Which one it is should be a deliberate choice.
• Public benefits and policy charges. Non-bypassable, applied to all customers, and periodically adjusted. These have been a visible driver of Connecticut bill increases and are not avoidable by switching suppliers — a distinction worth understanding before you blame the wrong line item.

Our guide to reading a commercial electric bill walks through how these separate on the statement.

Connecticut Load Profiles Worth Pricing Carefully

• Advanced manufacturing and aerospace. Connecticut's precision manufacturing base runs high load factors with significant process load — the most attractive shape suppliers see, and one that should earn tight margins. See manufacturing energy procurement.
• Hospitals and health systems. Non-curtailable and reliability-critical. In a market this volatile, budget certainty is usually worth more than the last basis point. See healthcare energy procurement.
• Higher education and independent schools. Strong seasonal shape with summer troughs, which changes both the optimal term and the value of index exposure.
• Commercial real estate along the I-95 and Route 8 corridors. Multi-tenant buildings with submetering questions and aggregation potential. See commercial real estate energy.
• Cold storage and food processing. Refrigerated load in a high-price region is one of the largest energy cost burdens per square foot of any commercial use. See cold storage energy costs.

The Winter Question Every CT Buyer Has to Answer

New England's defining risk is winter. Cold snaps constrain gas, spike power prices, and blow up energy budgets for anyone floating on the market. That risk drives two decisions:

• How much of your load should be fixed. A fully fixed contract transfers the winter risk to your supplier and you pay a premium for it. Full index exposure keeps the premium and the risk. Block and index — hedging the base and floating the rest — is often the right structure in ISO-NE precisely because it lets you buy protection where it matters most.
• When you sign. Forward curves for New England price winter risk seasonally. Signing in the middle of a cold snap, when everyone else is also worried, is the most expensive moment to buy certainty. See when to lock in energy rates.

Our deeper look at the regional market is in ISO New England: why the region pays more, which applies to Connecticut in full.

What to Do

• Find out whether you are on Last Resort Service. If you are, you are floating on the market in the most weather-exposed grid in the country. Fix that first.
• Run a competitive solicitation. Identical terms to every licensed supplier on the same day. Connecticut has a deep supplier bench and the spread between offers on the same building is routinely material.
• Decide fixed versus pass-through deliberately. Especially for capacity, which is not trivial in ISO-NE.
• Audit your delivery charges. Rate class errors persist for years. A bill audit recovers retroactively.
• Look at demand. ISO-NE peak-driven costs reward load that can move. Demand response turns flexibility into revenue.

Frequently Asked Questions

Can Connecticut businesses choose their electricity supplier?

Yes. Connecticut opened to retail electric competition in 2000, and commercial customers of Eversource and United Illuminating can purchase generation service from any supplier licensed by the Public Utilities Regulatory Authority. Your utility continues to deliver the power.

What is Last Resort Service in Connecticut?

Last Resort Service is the default generation service for larger commercial and industrial accounts that have not chosen a competitive supplier. Unlike Standard Service for smaller customers, it is priced on a short cycle and closely tracks the wholesale market, so it exposes a business to New England's price volatility rather than shielding it.

Will switching suppliers lower my whole Connecticut bill?

It lowers the supply portion only. Delivery charges and public benefits charges are set by regulation and apply regardless of who supplies your electricity. Supply is typically the largest single block on a commercial bill, so the savings are real — but a supplier who implies they can reduce your delivery or policy charges is misrepresenting how the market works.

Why do Connecticut electricity prices spike in winter?

ISO-New England depends heavily on natural gas generation, and pipeline capacity into the region is limited. During extreme cold, gas is prioritized for heating, generators turn to more expensive fuels, and wholesale power prices rise sharply. That winter risk is priced into forward contracts throughout the year.

Is a fixed-rate contract always the safest choice in Connecticut?

Safest is not the same as cheapest. A fully fixed contract transfers price risk to the supplier, and you pay a premium for that transfer — a premium that is larger in a volatile region like New England. For businesses that can absorb some variability, hedging most of the load and floating the remainder often produces a lower expected cost with acceptable risk.