IFTA permits for interstate carriers.
If your trucks cross state or provincial lines, you almost certainly need an International Fuel Tax Agreement (IFTA) permit. The agreement exists to make fuel taxes simpler, and it does. What it does not simplify is the paperwork required to get and keep your credentials. Simplex Group has been handling IFTA permits for truckers for over two decades, and our permitting managers register your fleet, file your quarterly returns, and keep your records audit-ready.
IFTA at a glance
Key takeaways
An IFTA permit replaces filing in every state
Your IFTA license and decals let you file one quarterly fuel tax return with your base jurisdiction instead of separate returns in each state or province you drive through.
Only qualified motor vehicles need it
A vehicle qualifies if it has three or more axles, or two axles with a registered gross vehicle weight over 26,000 pounds, or operates in a combination exceeding 26,000 pounds.
Filing is quarterly and mandatory
Returns are due four times a year, even in quarters when you owe no tax at all.
Late filings carry a defined penalty
Under the IFTA Articles of Agreement, the standard penalty is $50 or 10% of the net tax owed, whichever is greater, plus interest.
Records must be kept for four years
Most jurisdictions require carriers to retain mileage logs and fuel receipts for four years in case of an audit.
No IFTA license means buying trip permits
Carriers without IFTA credentials must purchase a temporary fuel trip permit for each jurisdiction before entering it.
What is an IFTA permit?
An IFTA permit is the license and set of decals that allow a carrier to report and pay motor fuel taxes for every jurisdiction it operates in through a single quarterly return filed with its base jurisdiction. The International Fuel Tax Agreement is a pact between most U.S. states and Canadian provinces to consolidate how commercial vehicle operators pay fuel tax.
Trucking companies, independent owner-operators, and interstate motor carriers typically run through several states, each with its own fuel tax rate and its own rules. Without IFTA, that means a separate filing, or a separate fuel trip permit, in every one.
Here is what the agreement changes in practice. If you are based in New York and run through New Jersey and Pennsylvania, you do not file three returns. You file one in New York, and the three jurisdictions settle the tax between themselves based on the miles you reported.
Who needs an IFTA license?
IFTA applies to interstate carriers operating a qualified motor vehicle. A vehicle qualifies if it meets any one of the following criteria.
Three or more axles
Any self-propelled unit with three or more axles qualifies, regardless of how much it weighs.
Two axles over 26,000 pounds
A two-axle vehicle with a registered gross vehicle weight exceeding 26,000 pounds (11,793 kilograms) qualifies.
Combinations over 26,000 pounds
A vehicle used in combination with another qualifies when the combined registered gross vehicle weight exceeds 26,000 pounds.
Travel in two or more jurisdictions
If your vehicle fits one of these descriptions and you travel through more than one IFTA member jurisdiction, you are eligible to apply for IFTA credentials.
Who is exempt from IFTA?
Recreational vehicles used for personal, non-commercial travel are excluded from the qualified motor vehicle definition. Carriers that operate exclusively within a single state are not subject to IFTA at all, since the agreement covers interstate operations specifically. Certain government-owned vehicles may also be exempt depending on the jurisdiction.
Farm vehicles, special mobile equipment, and buses are a common point of confusion. These can be subject to IFTA if they meet the weight or axle criteria and cross state borders.
IFTA quarterly filing deadlines
IFTA returns are due the last day of the month following the close of each quarter. When that date falls on a weekend or federal holiday, the deadline moves to the next business day.
| Quarter | Reporting period | Due date |
|---|---|---|
| Q1 | Jan 1 – Mar 31, 2026 | Apr 30, 2026 |
| Q2 | Apr 1 – Jun 30, 2026 | Jul 31, 2026 |
| Q3 | Jul 1 – Sep 30, 2026 | Nov 2, 2026 |
| Q4 | Oct 1 – Dec 31, 2026 | Feb 1, 2027 |
A return is required for every quarter your license is active. Quarters in which you owe no net tax still require a filing.
What happens if you file late
Missing a deadline triggers penalties in most jurisdictions automatically. The standard penalty under the IFTA Articles of Agreement is $50 or 10% of the net tax owed, whichever is greater. Interest accrues on the unpaid balance at a rate each jurisdiction sets annually.
The longer-term cost is worse than the fine. Repeated late filings create a compliance record that follows your operation, and an unpaid balance can block your IFTA license renewal until the tax, penalties, and interest are all cleared. Late and inconsistent filings are also a known audit trigger, which is why DOT audit preparation and IFTA recordkeeping tend to be handled together.
What information do you need to apply for an IFTA license?
Gather the following before you start your application.
- EIN (Federal Employer Identification Number)
- Legal business name and DBA, if applicable
- Physical and mailing addresses
- Vehicle details, including make, model, VIN, and gross weight
- Base jurisdiction where your records are kept and vehicles registered
- Contact name and information
- Operation type: owner-operator, fleet, or lessee
- Fuel types used, such as diesel or gasoline
- Estimated annual distance per jurisdiction
- List of states and provinces you will be operating in
- Effective date the permit needs to be active
- Proof of insurance and business licenses, where required
These are the most common requirements, but every U.S. state and Canadian province sets its own rules and its own application form. Check with your base jurisdiction's IFTA office for the current requirements, or let our team confirm them for you.
You will also need an active USDOT number and, for most for-hire interstate carriers, operating authority before your IFTA application can move forward.
How to get your IFTA permit with Simplex
Five steps, and you are only responsible for one of them.
Tell us how you operate
Give us your fleet details, base jurisdiction, and the states you run. A permitting manager confirms whether your vehicles meet the qualified motor vehicle definition and which credentials you actually need.
We prepare and submit your application
We complete the registration paperwork for your base jurisdiction and file it on your behalf, accurate and on time. You do not chase forms, and you do not guess at jurisdiction-specific fields.
Receive your license and decals
Your IFTA license and decals are issued by your base jurisdiction. Keep a copy of the license in the cab and display the decals on both sides of each qualified vehicle.
We handle your quarterly reports
Each quarter your permitting manager collects your mileage and fuel data, calculates tax owed or credited by jurisdiction, and files the return before the deadline. Fuel receipts are tracked and payments made to the respective states on your behalf.
We keep you current
Regulations change. We monitor updates that affect your filings, handle your annual renewal, and keep four years of documentation organized so an audit notice does not turn into a scramble.
Prefer filing support only?
Carriers who already hold credentials can keep permits and reporting under one roof with our IFTA filing service for ongoing quarterly returns.
IFTA permit vs. temporary fuel trip permit
These are not interchangeable, and confusing them is expensive.
IFTA permit
One license and set of decals covering all member jurisdictions through a single quarterly return.
- Covers every IFTA member state and province
- One consolidated return each quarter
- Renewed annually
- Best for carriers crossing state lines regularly
Temporary fuel trip permit
A single-jurisdiction, short-term permit bought before entering a state you are not licensed to run in.
- One permit per jurisdiction, per trip
- Must be purchased before you enter
- No quarterly return required
- Best for occasional runs outside your normal lanes
If you are not IFTA-licensed, you must purchase a fuel trip permit for each jurisdiction before you enter it. For a carrier crossing state lines regularly, buying trip permits load by load costs more and takes more time than holding an IFTA license. If you need one quickly, our team handles trucking permits of both kinds.
Why carriers choose Simplex for IFTA
The paperwork is not the hard part of IFTA. The hard part is doing it accurately, four times a year, for years, while you are running a truck.
Our permitting managers do this daily across all 50 states, from offices in Texas, California, Florida, and Illinois. You get a named point of contact rather than a ticket queue, filings submitted before the deadline rather than on it, and records kept in a form that holds up if a jurisdiction asks questions later.
Written and maintained by
Product Evolution & Innovation · Simplex Group
How trucking products and services evolve in response to industry needs, regulation, technology, and customer behaviour.
Frequently asked questions
What is an IFTA permit for truckers?+
Who is required to have an IFTA license?+
How often do I have to file IFTA reports?+
What happens if I file my IFTA return late?+
How long do I need to keep IFTA records?+
Do I need an IFTA permit if I only drive in one state?+
What do I do if I am not IFTA-licensed but need to cross a state line?+
Can Simplex file my quarterly IFTA returns for me?+
Related permitting and tax services
Most carriers who need IFTA need at least one of these in the same year.
Keep your trucks moving and your fuel taxes filed
IFTA compliance is not complicated, but it is unforgiving of gaps. Carriers who track jurisdiction miles and fuel purchases as they go, and file on time every quarter, spend very little time on IFTA and carry very little risk. Carriers who wait until the deadline spend a weekend on it and hope the numbers reconcile.
Let our permitting team carry it instead. We will handle the registration, the quarterly returns, and the records. You keep the truck moving.