IFTA Tax Calculator
Estimate your quarterly IFTA fuel tax across every state you ran. Enter your miles per state and your truck's MPG.
Miles by state
mpg
Estimated tax owed
$72.00
6.50 MPG fleet average across 2,200 miles.
| State | Gallons | Rate/gal | Tax |
|---|---|---|---|
| Arkansas | 61.5 | $0.2850 | $17.54 |
| Oklahoma | 92.3 | $0.1900 | $17.54 |
| Texas | 184.6 | $0.2000 | $36.92 |
Gross estimate before fuel tax you already paid at the pump. Confirm official rates with your base jurisdiction before filing.
How this is calculated
IFTA settles fuel tax across state lines: one quarterly return redistributes what you owe based on where you actually drove.
- Fleet MPG: total miles divided by total gallons burned.
- Taxable gallons per state: the miles you ran there divided by that fleet MPG.
- Tax per state: those gallons times the state's rate per gallon. Indiana, Kentucky, and Virginia add a surcharge with no pump credit, so it shows as its own line.
- Rates change every quarter, so treat this as an estimate and confirm the official rate with your base jurisdiction before you file.
- iTrucked keeps the rates current and assembles the whole return from the trips you already logged.
Common questions
What is IFTA and who has to file?
The International Fuel Tax Agreement splits the fuel tax you owe among the states and provinces you drove through. If you run a qualified vehicle across state lines, you file one quarterly return with your base state and it settles the rest.
How is the tax actually worked out?
You take your total miles and total gallons to get a fleet MPG. For each state, miles divided by that MPG gives the gallons burned there, and gallons times the state rate is the tax. States where you paid more at the pump than you owe come back as a credit.
Why do Indiana, Kentucky, and Virginia show a surcharge?
Those states charge a separate surcharge on top of the fuel tax, and there is no pump credit against it. The calculator lists it as its own line so the number matches your return.
When is the IFTA return due?
Quarterly: April 30, July 31, October 31, and January 31 for the quarter that just ended. If the date lands on a weekend or holiday it moves to the next business day.
Is this exact enough to file with?
Treat it as an estimate to check your own numbers. Rates change every quarter, so confirm the current rate with your base jurisdiction before you file. iTrucked keeps official rates current and builds the return from your real trips.
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