IFTA Licensing and Fuel Tax Reporting: What Fleet Managers Need to Know | MRS

What Is the International Fuel Tax Agreement?

The International Fuel Tax Agreement simplifies fuel tax reporting for commercial carriers crossing state and provincial lines. Before IFTA, carriers had to purchase fuel use permits in every jurisdiction they entered and file separate fuel tax returns with each state. IFTA replaced that system with a single license, a single quarterly return, and one base state that handles all distribution.

IFTA covers 48 contiguous US states and 10 Canadian provinces. Alaska, Hawaii, and the Canadian territories of Yukon, Northwest Territories, and Nunavut do not participate. Carriers operating exclusively in non-IFTA jurisdictions do not need IFTA credentials, but any carrier crossing into a participating jurisdiction with a qualifying vehicle must be licensed.

The agreement is administered by IFTA, Inc., which maintains the uniform license requirements, reporting standards, and audit procedures across all member jurisdictions. Each member jurisdiction sets its own fuel tax rate, but the reporting mechanics are standardized.

Who Needs IFTA Licensing?

IFTA applies to qualified motor vehicles that operate in two or more IFTA jurisdictions. A qualified motor vehicle is one that:

• Has two axles and a gross vehicle weight or registered gross vehicle weight exceeding 26,000 lbs
• Has three or more axles regardless of weight
• Is used in combination when the combined gross vehicle weight exceeds 26,000 lbs

Recreational vehicles used solely for personal travel are exempt. Government vehicles are also exempt. Carriers operating only within one jurisdiction use that jurisdiction’s intrastate fuel tax system instead of IFTA.

If your fleet crosses state lines with qualifying vehicles and you are not IFTA-licensed, you are operating out of compliance. Weigh station officers check for IFTA decals, and operating without them can result in fines, back taxes assessed at the maximum rate for each jurisdiction entered, and potential vehicle impoundment.

How Quarterly IFTA Fuel Tax Returns Work

IFTA reporting runs on a calendar quarter basis. Returns are due on the last day of the month following the close of each quarter:

• Q1 (January-March): due April 30
• Q2 (April-June): due July 31
• Q3 (July-September): due October 31
• Q4 (October-December): due January 31

Each quarterly return requires two core data sets: total miles traveled in each IFTA jurisdiction, and total gallons of fuel purchased in each jurisdiction. From those inputs, the return calculates the fuel consumed in each jurisdiction (using your fleet’s average fuel economy), compares it to the fuel tax already paid through pump purchases, and determines a net tax due or net credit for each jurisdiction.

The math works like this: if you drove 10,000 miles in Texas and your fleet averages 6 miles per gallon, you consumed approximately 1,667 gallons in Texas. At Texas’s fuel tax rate, that generates a certain tax liability. If you purchased 2,000 gallons in Texas, you already paid more fuel tax to Texas than you owe. You receive a credit for the overpayment. If you purchased only 500 gallons in Texas, you owe the difference. Net amounts across all jurisdictions are settled with your base state in one payment or refund.

This system rewards carriers who purchase fuel in low-tax states and penalizes those who purchase in high-tax states but operate heavily in high-tax jurisdictions. Fuel purchase strategy is a real cost lever for fleet managers.

IFTA Credentials: License and Decals

IFTA credentials consist of two items. The IFTA license is a single document issued by your base state. It must be carried in each qualifying vehicle or, in some base states, a photocopy is acceptable in the vehicle while the original is kept on file. Check your base state’s specific rules.

IFTA decals are two small stickers, one for each side of the cab. New decals are issued annually by your base state, typically in November or December for the following calendar year. The current year’s decals must be displayed; operating with expired decals is a violation even if your license is current.

Replacement decals for lost or damaged items are available from your base state’s motor carrier division. Montana Registration Services handles decal replacement requests for carriers registered through MRS.

Base State Selection for IFTA

IFTA base state and IRP base state must be the same jurisdiction. A carrier cannot use Montana for IRP and a different state for IFTA. The base state is determined by where the carrier has its established place of business, where vehicles are dispatched from, and where operational records are maintained.

Base state matters financially for two reasons. First, it determines which fuel tax rates apply to your net calculations, since some base states have more favorable rate structures. Second, it determines where audit risk concentrates. IFTA audits are conducted by the base state, but the base state audits on behalf of all member jurisdictions. A carrier with a good base state relationship and clean records is in a better position during audit than one with a contentious home state.

Montana’s IFTA fuel tax rate is competitive relative to high-tax states like California (currently among the highest fuel tax rates in the country), New York, and Pennsylvania. For fleets operating primarily in the western US and Canada, Montana’s rate structure and geographic positioning make it an attractive base state.

Montana and IFTA: The Structural Advantage

Montana has no sales tax on fuel purchases. For carriers purchasing fuel in Montana, there is no sales tax component on top of the fuel tax, unlike some states where both apply. Montana’s fuel excise tax rates for diesel are set by the Montana Legislature and have historically been below the national average.

Carriers who establish a Montana LLC and base their fleet in Montana for IRP purposes also establish Montana as their IFTA base state. The two programs run together from a single motor carrier account with Montana’s Motor Vehicle Division. Annual renewals, decal issuance, and quarterly reporting all flow through one state relationship.

For fleet managers, consolidating IRP and IFTA in Montana means one point of contact for compliance, one set of renewal deadlines to track, and one state’s audit standards to maintain records for. That administrative simplification has real value for fleets managing 10 or more vehicles.

How Montana Registration Services Handles IFTA Enrollment

Montana Registration Services is a privately owned registration compliance company, not a government office or state agency. MRS processes IFTA enrollments alongside IRP registrations as part of fleet account setup, under contract with Montana’s Motor Vehicle Division (DOJ contract JUS24-0232GU-D).

When you set up a fleet account with MRS, IFTA enrollment happens as part of the same intake process as IRP. You do not manage two separate applications. MRS submits your IFTA license application to Montana’s Motor Vehicle Division, coordinates decal delivery, and sets up your quarterly reporting calendar with reminders before each due date.

MRS account managers also assist with mileage and fuel record organization at quarter-end, reducing the time your operations team spends compiling returns. For fleets with electronic logging devices (ELDs), MRS can work with your ELD provider’s export format to extract the jurisdiction mileage breakdown needed for quarterly returns.

Annual IFTA renewal through MRS includes updated decal procurement and confirmation that your license information reflects any fleet changes made during the year. Mid-year vehicle additions that affect IFTA reporting are tracked through your fleet account rather than requiring separate filings.

IFTA Record-Keeping Requirements

IFTA requires carriers to maintain records supporting every quarterly return for four years from the return due date or filing date, whichever is later. Required records include:

• Odometer readings for each trip, per vehicle
• Miles traveled in each jurisdiction per trip
• Fuel purchased, by jurisdiction, with receipts showing date, location, fuel type, and gallons
• Total fleet miles and total fuel consumed per quarter

ELDs automatically capture most of this data. For fleets without ELDs, driver trip reports must be completed for every trip with sufficient detail to support the jurisdictional mile breakdown. Generic “trip from Texas to California” records without state-line crossing points are not sufficient for IFTA audit purposes.

IFTA audits can examine any or all of the four prior years. Auditors verify that reported mileage matches GPS or ELD data, that fuel receipts support purchase amounts, and that the fleet’s average fuel economy is plausible given vehicle type and operation. Discrepancies are assessed at the maximum tax rate for the jurisdiction in question, with interest and potentially penalties applied.

IFTA and IRP: Running Both Through MRS

IFTA and IRP are separate programs administered by separate agreements, but they share a base state and require overlapping records. Fleet managers who handle IRP and IFTA separately, through different processors or in different states, create unnecessary administrative complexity and expose themselves to inconsistencies between their IRP mileage reports and IFTA returns.

MRS processes both IRP registration and IFTA licensing through a single Montana Motor Vehicle Division account. Your fleet’s mileage data feeds both programs from the same source. Renewal timelines are coordinated. When you add a vehicle mid-year, the IRP supplement and the updated IFTA vehicle list are handled together.

For fleet operators considering Montana as a base state, the combination of no sales tax, competitive fuel tax rates, competitive IRP fees, and single-state compliance management creates a straightforward value case. MRS handles the setup, enrollment, and ongoing management so your operations team focuses on moving freight rather than managing registration compliance.

To start your IFTA enrollment alongside IRP registration, contact MRS for a fleet intake assessment. An account manager will review your carrier profile, confirm base state eligibility, and provide a complete fee and timeline estimate before any commitment.