The short answer
The International Fuel Tax Agreement (IFTA) lets interstate carriers file one quarterly fuel tax return with their base state, which then distributes tax to the other member states. You need an IFTA license and decals if a qualified motor vehicle travels in two or more member jurisdictions. Returns are due April 30, July 31, October 31 and January 31.
Every state taxes fuel, and every state wants its share based on the miles you drive there. IFTA makes that manageable: one license, one quarterly return, one set of decals. This guide explains IFTA for owner-operators: who needs it, how a return works, what records to keep and how to avoid penalties.
Who needs IFTA
You need an IFTA license if you operate a qualified motor vehicle in two or more IFTA jurisdictions (the lower 48 US states and the Canadian provinces that participate). A qualified motor vehicle generally:
- Has two axles and a gross vehicle weight or registered weight over 26,000 lbs, or
- Has three or more axles regardless of weight, or
- Is used in combination over 26,000 lbs
Recreational vehicles are generally exempt. Intrastate-only carriers don't need IFTA but still pay fuel tax to their state.
How IFTA works
- You apply for an IFTA license with your base jurisdiction (usually the state where your vehicles are registered and your records are kept)
- You get a license and two decals per qualified vehicle, displayed on both sides of the cab
- Each quarter, you report miles driven and fuel bought in each jurisdiction
- The return calculates tax owed or credit due for each state
- You pay your base state, which distributes the money
Quarterly deadlines
IFTA quarterly filing deadlines
Returns are due the last day of the month after each quarter
- Q1 · Jan–MarDue April 30
- Q2 · Apr–JunDue July 31
- Q3 · Jul–SepDue October 31
- Q4 · Oct–DecDue January 31
| Quarter | Months | Return due |
|---|---|---|
| Q1 | January–March | April 30 |
| Q2 | April–June | July 31 |
| Q3 | July–September | October 31 |
| Q4 | October–December | January 31 |
How the return is calculated
For each jurisdiction, the return compares fuel you used there (miles driven there divided by your fleet's average miles per gallon) with fuel you bought there. If you used more than you bought, you owe that state tax. If you bought more than you used, you get a credit.
| Step | Example (illustrative only) |
|---|---|
| Total miles in quarter | 30,000 |
| Total gallons bought | 5,000 |
| Fleet MPG | 6.0 |
| Miles in State A | 6,000 → 1,000 gallons used |
| Gallons bought in State A | 700 → you owe tax on 300 gallons |
Records you need to keep
- Trip records with dates, routes, origin and destination
- Miles driven in each jurisdiction, backed by odometer or ELD/GPS data
- Fuel receipts showing date, seller, location, gallons, fuel type and price
- Vehicle unit numbers
Keep records for four years from the return due date or filing date, whichever is later. IFTA audits can review that period.
Penalties
Late filing or late payment can bring a penalty (generally the greater of $50 or 10% of net tax due) plus interest. Repeated problems can lead to license revocation. Operating without valid decals can bring fines at inspection.
Do I file if I didn't drive?
Generally yes. Most base jurisdictions require a return every quarter, even if it's a zero return.
IFTA tips for owner-operators
- Use your ELD or a mileage app that records state-line crossings
- Photograph or scan fuel receipts the day you buy
- Reconcile monthly so the quarter-end return isn't a scramble
- Keep your IFTA license copy in every truck
Where IFTA fits with your other registrations
IFTA is separate from UCR and IRP plates. New carriers often set up all three right after their authority activates. See new authority truck insurance and MC number vs. DOT number for the full sequence.
Questions truckers ask
When are IFTA returns due?
April 30, July 31, October 31 and January 31, for the previous quarter.
Who needs an IFTA license?
Carriers operating a qualified motor vehicle (over 26,000 lbs, or three or more axles) in two or more IFTA jurisdictions.
Do I file IFTA if I didn't drive that quarter?
Generally yes. Many base states require a zero return.
How long do I keep IFTA records?
Four years from the return due date or filing date, whichever is later.
What is the IFTA late penalty?
Generally the greater of $50 or 10% of net tax due, plus interest. Check with your base jurisdiction.
Written by the FairlyCover Editorial Team. This guide explains how coverage generally works. It isn't legal or insurance advice, and your policy wording always decides what's covered. How we write and review content.
