Free IFTA Mileage & Tax Calculator
Calculate per-state mileage from any trip, then compute your quarterly IFTA fuel tax due — all in one place.
Rates last refreshed Jun 23, 2026 at 07:02 PM UTC
Enter your pickup, any intermediate stops, and delivery. We route the full trip and calculate miles per IFTA state automatically.
| Jurisdiction | Miles in state |
|---|
Trips calculated
| Route | Miles | |
|---|---|---|
| Total |
State totals across all trips
| Jurisdiction | Total miles |
|---|
| State | Miles in state | Fuel bought here (gal) | Rate ($/gal) | Taxable gal | Tax due / (refund) | |
|---|---|---|---|---|---|---|
| Totals | 0 | 0 | — | 0 | $0.00 |
Diesel rates only. Surcharges (Indiana, Kentucky, Virginia) already included. Oregon $0.000/gal — weight-mile state. See per-state notes →
Skip the manual entry entirely.
With a free account, MyCarrierVault reads your ELD PDF and fills every state's miles automatically. It also stores all four quarters of history, tracks driver DQ files, vehicle records, and document expiry.
How the IFTA tax calculator works
- Enter miles per state — these are the miles your truck drove inside each jurisdiction during the quarter, regardless of where you bought fuel.
- Enter gallons purchased per state — the gallons you actually bought (and paid fuel tax on) inside each jurisdiction.
- We compute fleet MPG by dividing your total miles by your total gallons.
- Taxable gallons per state = miles in that state ÷ fleet MPG. This is the fuel you "consumed" in that state.
- Tax due per state = (taxable gallons − gallons purchased there) × that state's IFTA rate. A negative number is a refund/credit owed back to you.
- Net tax due is the sum across all states. That's what you owe on your IFTA return for the quarter.
What if my state is missing?
Only the 48 contiguous U.S. states are IFTA jurisdictions. Alaska and Hawaii are not IFTA members — they use their own state fuel-tax filings. The 10 Canadian provinces (AB, BC, MB, NB, NL, NS, ON, PE, QC, SK) are also IFTA jurisdictions but aren't shown here yet.
How accurate are these rates?
Diesel IFTA rates are refreshed automatically each time you open this calculator (at most once per day) and reflect the latest published quarter. Rates shown above are what's currently in our database — always cross-check before filing your return.