Statewide average updated daily • Source: AAA
Connecticut consistently ranks among the most expensive states for gasoline in the country, typically running 30 to 60 cents above the national average. The state has one of the highest effective gas tax burdens in the nation, requires reformulated fuel, and sits in the high-cost Northeast corridor where real estate and operating costs for fuel retailers are among the highest in the country. Connecticut’s small geographic size means there is little price variation within the state — drivers cannot simply cross to a cheaper part of Connecticut to save money the way residents of larger states can.
Connecticut’s state gas tax is approximately 25 cents per gallon in excise tax, but the state also applies its petroleum products gross earnings tax — a percentage-based tax on wholesale fuel value — which adds a significant variable component. When wholesale fuel prices are high this percentage tax automatically generates more revenue, amplifying Connecticut’s effective tax burden during price spikes.
Connecticut requires reformulated gasoline statewide as part of the Northeast Ozone Transport Region, adding production cost that is passed to consumers. The state receives fuel via pipeline from Gulf Coast supply and marine terminals along Long Island Sound, but its distance from major refining centers adds transportation cost.
The high cost of operating retail businesses in Connecticut — one of the most expensive states for real estate and labor — contributes to wider retail margins than lower-cost states. Connecticut also has relatively few large discount fuel retailers compared to southern states, reducing the competitive pressure that helps keep prices down elsewhere.
Did you know? Connecticut has the highest per-capita income of any state in the country, yet its residents consistently pay some of the highest gas prices in the nation. Connecticut’s petroleum gross earnings tax is one of the most unusual fuel tax mechanisms in the country — calculated as a percentage of wholesale value, it automatically rises when oil markets are expensive, amplifying rather than cushioning price spikes. Connecticut temporarily suspended its 25 cent per gallon excise tax in 2022 during record high national prices, providing several months of relief before reinstating the tax.
Compare today’s average in Connecticut with nearby states to understand regional price differences.
Learn more about what drives gas prices across the United States.
Crude oil prices are the biggest driver of what you pay at the pump. For U.S. and global crude oil production data updated from EIA figures, see Oil Production Live.