Connecticut IFTA Calculator
Example rate: ~$0.499/gallon. Enter your actual miles and gallons below to estimate what you owe.
Rates shown are illustrative example rates for this demo calculator. Pull current quarterly rates from IFTA Inc. before filing.
| State | Taxable Gal. | Tax Owed |
|---|---|---|
| CT | 600.0 | $299.40 |
Running Freight Through Connecticut
Above-Average Fuel Tax
Connecticut's fuel tax rate runs well above the national average, so Connecticut miles, even a short pass-through on I-95, can account for a larger share of quarterly IFTA liability than the same mileage in most other states.
Separate Highway Use Tax
Connecticut requires many heavier commercial vehicles to register and pay a separate state highway use tax based on miles driven in the state, on top of standard IFTA reporting, so carriers running Connecticut regularly should confirm their registration status.
Heavy I-95 and I-84 Congestion
Connecticut's stretch of I-95 along the coast and I-84 through Hartford are known for some of the worst truck congestion in the Northeast, so carriers should build significant schedule buffer into any Connecticut delivery window.
IFTA and Trucking in Connecticut: What to Know
Connecticut is small enough to cross in a couple of hours, but I-95 and I-84 through the state carry some of the heaviest, most congested truck traffic in the Northeast. The state also became one of the few in the country to add a highway use tax specifically for larger commercial trucks, a separate requirement carriers should know about beyond their standard IFTA filing. Fuel taxes here run well above the national average, so even short Connecticut legs matter to a quarterly return.
IFTA Filing for Connecticut Miles
Connecticut participates in IFTA like every other member jurisdiction, so a carrier based outside the state reports Connecticut miles and any fuel purchased in Connecticut on their regular quarterly return through their home base state rather than filing separately with Connecticut for standard fuel tax purposes. Because Connecticut's per-gallon rate runs high, it's worth double-checking Connecticut mileage and fuel records carefully, since a small error here has a larger dollar impact than the same error would in a lower-rate state.
Highway Use Tax and Enforcement
Beyond standard IFTA reporting, Connecticut requires many commercial vehicles above a certain weight to register separately for the state's highway use tax and file periodic returns based on miles driven within Connecticut, which is a requirement specific to this state and not part of the IFTA system.
Connecticut State Police and the Department of Motor Vehicles also run weight and safety enforcement along I-95 and I-84, with fixed and portable scales used at various points, so carriers should keep both IFTA and highway use tax paperwork current and available together.
Tolls and Congestion Planning
Connecticut does not currently charge tolls on its interstates, but the tradeoff is some of the heaviest, most consistent truck congestion in the Northeast along I-95 near the coast and I-84 through the Hartford area. Carriers scheduling deliveries in or through Connecticut should plan around rush hour windows in both corridors and build in extra time, since a short mileage total on paper doesn't always translate to a short amount of time on the road.
Weather and Seasonal Planning
Connecticut sees a full range of Northeast seasonal weather, including winter snow and ice that regularly affects I-84 and the interior of the state more than the immediate coastline, along with occasional nor'easters that can bring heavy snow and high winds statewide.
Coastal areas near Long Island Sound can also see effects from strong storms moving up the Atlantic seaboard, so carriers running Connecticut in late summer and fall should watch tropical storm remnants in addition to the state's normal winter weather pattern.
Other Northeast States
Carriers Running Connecticut Freight
“Connecticut is short on miles but long on time if you hit I-95 at the wrong hour. I plan every Connecticut delivery around rush hour now, not around distance.”
“The highway use tax caught me off guard the first year it applied to my truck. Now it's just part of my regular paperwork alongside IFTA.”