Enter the miles you ran and the fuel you bought in each state. The calculator works out your fleet MPG, the taxable gallons in every state, and what you owe or get back, using the official IFTA rates. No signup, nothing to download.
Nothing you type leaves your browser.
Ranks the drivers who can take each load, with hours of service, location and equipment counted in.
ETAs that account for hours of service, with voice check calls that ask the driver for an update.
Reads rate confirmations from your email and turns them into draft orders for your team to review.
Bids on loads by phone, so your team spends less time on calls.
Fleet MPG, taxable gallons by state, and tax due or credit.
Choose a state and enter its miles and the gallons you bought there. Add each state you drove through, and your result shows here.
Rates for 4th Quarter 2026, source iftach.org. Diesel (special fuel), U.S. dollars per gallon, copied 2026-10-21. IFTA, Inc. marks this matrix as not final until December 4, 2026. This is an estimate to plan with, not a filed return.
One fuel tax return a quarter, instead of one for every state you drive through.
The International Fuel Tax Agreement, or IFTA, is an agreement among U.S. states and Canadian provinces. A truck that drives through several of them pays fuel tax to the one that owns the road, in proportion to the miles it ran there. Instead of filing in every state, you file one quarterly return with your base jurisdiction, the one that licenses you. That jurisdiction collects what you owe or refunds your credit, and passes the money to the others. IFTA is an agreement among jurisdictions, not a federal program, and the rates and rules are published by IFTA, Inc. at iftach.org.
Any carrier running a qualified vehicle in two or more member jurisdictions.
IFTA applies to a qualified motor vehicle used in two or more member jurisdictions. Under the agreement a vehicle qualifies if it has two axles and a registered gross weight over 26,000 pounds, or three or more axles at any weight, or is used in a combination weighing over 26,000 pounds. Recreational vehicles are excluded. If that describes your trucks, you need an IFTA license from your base jurisdiction and a decal for each truck. Your state agency decides the details, so check its IFTA page before you rely on this summary.
The return is due on the last day of the month after the quarter ends.
| Quarter | Months | Return due |
|---|---|---|
| Q1 | January to March | April 30 |
| Q2 | April to June | July 31 |
| Q3 | July to September | October 31 |
| Q4 | October to December | January 31 |
A due date that falls on a weekend or holiday moves to the next business day. File every quarter, even one with no miles. Late or missing returns can bring penalties and interest, set by your base jurisdiction.
Four steps, and one worked example you can match against the calculator above.
Divide total miles by total gallons for the quarter. 10,000 miles on 1,600 gallons is 6.25 miles per gallon.
Divide the miles you ran in a state by your fleet MPG. 6,000 miles in Texas is 960 gallons. 4,000 miles in Kentucky is 640 gallons.
Texas taxes diesel at $0.2000 a gallon, so 960 gallons owes $192.00. Kentucky is $0.2200 plus a $0.1050 diesel surcharge, $0.3250 in all, so 640 gallons owes $208.00.
Say you bought 1,000 gallons in Texas and 600 in Kentucky. Texas: $192.00 owed less $200.00 paid is an $8.00 credit. Kentucky: $208.00 owed less $132.00 paid (600 gallons at the $0.2200 base rate, because the surcharge is not paid at the pump) is $76.00 due. Net: $68.00 due.
Press "Load the example" in the calculator to see these figures. The calculator keeps decimals until the end and rounds money to the cent. A real return rounds at the steps your base jurisdiction's form sets, so treat the result as an estimate and file on the official form.
Most corrections come from the records, not the math.
Kentucky and Virginia add a separate diesel surcharge on top of the base rate. Skipping it understates the tax. It is owed on the fuel you burn there and is not paid at the pump, so it never counts as a credit. The calculator handles both.
Rates change each quarter, and a quarter's matrix is not final until IFTA, Inc. says so. Use the rates for the quarter you are filing.
Tax is owed where you drive, not where you fill up. A state with miles and no purchases still owes tax, and a state with purchases and few miles gives you a credit.
Round-number mileage by state is the first thing an auditor questions. Use trip records or GPS data that name the state for each mile.
A purchase you cannot document can be disallowed, which removes the credit for that fuel.
You still file. A zero return is a return.
Keep the trip-level proof behind every number on the return.
For each truck, keep the miles driven in every jurisdiction, with the dates and routes behind them. For fuel, keep a receipt for every purchase showing the date, the seller, the state, the gallons and the price. Keep your filed returns too. Jurisdictions expect these records to be kept for at least four years, so confirm the period with your base jurisdiction.
Yes. There is no signup and no email, and the result shows on the page as you type. Command, the Hemut TMS, is optional.
The diesel (special fuel) rates from the IFTA, Inc. tax rate matrix for the quarter shown on the page, with the Kentucky and Virginia surcharges added. The page names the quarter and links the matrix it was copied from.
Not yet. It is built for diesel trucks. For gasoline, propane or natural gas, use the full matrix at iftach.org.
No. The Canadian provinces are rated in Canadian dollars per litre. This tool covers U.S. jurisdictions only.
No. It estimates what you will owe or get back. File on your base jurisdiction's official IFTA return, using your own records.
Command, the Hemut TMS, adds up each truck's miles by state from its GPS, so you are not rebuilding the quarter from receipts and logs.
