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United States · CT
Connecticut
IFTA fuel tax rates, jurisdiction details, and neighboring states for Connecticut.
Current tax rates
Diesel
$0.4615/gal
Gasoline
$0.2500/gal
Effective 2026-04-01. Per gallon, USD.
Jurisdiction
Code
CT
Country
United States
Region
Northeast
Timezone
Eastern
Neighboring jurisdictions
Trips through Connecticut commonly cross into these. Check their rates if you log miles there too.
IFTA in Connecticut
Connecticut is a member of the International Fuel Tax Agreement. Carriers operating qualified vehicles in Connecticut report all miles traveled and fuel purchased in the state on their quarterly IFTA returns.
Fuel purchased in Connecticut generates a tax credit at the rate of $0.4615/gal/gal for diesel. If you put more miles on the road in Connecticut than the fuel you purchased there would cover, you owe additional tax. If you purchased more fuel than you used, you receive a credit.
Calculate CT