IFTA Inputs
State Mileage and Fuel Entries
| State | Miles in State | Tax-Paid Gallons |
|---|
IFTA Tax Calculator
Estimate quarterly IFTA due or credit by state using total gallons, state miles, and tax-paid gallons.
How This Calculator Helps
This IFTA estimator organizes state miles, tax-paid gallons, and total gallons into a quarterly due or credit planning view.
Use it before filing season to spot fuel tax exposure and catch obvious mileage or gallon entry problems early.
How to Use This Calculator
- Select the quarter, fuel type, and base jurisdiction.
- Enter total gallons purchased for the quarter.
- Add state rows with miles and tax-paid gallons.
- Review fleet MPG and state-level estimated due or credit.
Frequently Asked Questions
What is IFTA?
IFTA is a fuel tax reporting agreement for motor carriers operating in multiple jurisdictions. It simplifies reporting by filing one quarterly return through your base state.
Why do deadhead miles count?
Deadhead still consumes fuel and affects fleet MPG, so it belongs in mileage totals used to estimate taxable gallons.
How is fleet MPG calculated?
Fleet MPG is total miles divided by total gallons purchased for the quarter. It is then used to estimate taxable gallons per state.
Why do some states show a credit?
A credit appears when tax-paid gallons in a state exceed estimated taxable gallons for that jurisdiction.
How often do tax rates change?
State rates can change quarterly. Use current jurisdiction rates when preparing final filings.