IFTA Filing Due Dates

Keeping up with IFTA filing due dates is a routine part of operating across state and provincial lines. It’s also pretty easy to lose track of them during a busy quarter. Between mileage records, fuel receipts, and day-to-day operations, deadlines can come up faster than expected.

Understanding when IFTA is due, and what needs to be filed, is key to staying compliant and avoiding penalties.

In this guide, we’ll break down the quarterly IFTA schedule, key deadlines, what happens if you miss a filing, and how the process works.

What Is IFTA?

The International Fuel Tax Agreement (IFTA) is an agreement between U.S. states and Canadian provinces that simplifies how fuel taxes are reported and paid by interstate motor carriers.

Instead of filing separate fuel tax reports in every jurisdiction you travel through, IFTA allows you to file a single quarterly return through your base jurisdiction. That jurisdiction then distributes the appropriate taxes to the other states or provinces where your vehicle operates.

IFTA currently includes 48 U.S. states and 10 Canadian provinces. Alaska, Hawaii, the District of Columbia, Yukon, Northwest Territories, Nunavut, and Mexico are not part of the agreement.

Who Needs an IFTA License?

IFTA generally applies to motor carriers operating qualified vehicles across multiple jurisdictions.

You typically need an IFTA license if your vehicle:

• Has two axles and a gross vehicle weight over 26,000 pounds
• Has three or more axles, regardless of weight
• Is used in combination and exceeds 26,000 pounds gross combined weight

Once registered, carriers must file quarterly IFTA fuel tax reports based on miles traveled and fuel purchased in each jurisdiction.

When Is IFTA Due?

IFTA operates on a quarterly reporting schedule, meaning carriers must file a fuel tax return four times per year with their base jurisdiction.

Each return reports:

• Total miles traveled
• Fuel purchased
• Operations across all IFTA jurisdictions

The key rule:
IFTA returns are due on the last day of the month following the end of each quarter.

For example, if the reporting quarter ends in March, the return is due by April 30.

While most carriers file quarterly, fleets with very low mileage may qualify for annual filing. In those cases, the return is typically due on January 31.

It’s also important to remember that if a due date falls on a weekend or holiday, the deadline usually moves to the next business day. 

Key Facts to Know About IFTA Due Dates

Understanding the schedule is important, but a few details are easy to overlook:

• Deadlines are consistent across jurisdictions
  IFTA filing deadlines follow the same quarterly schedule regardless of your base jurisdiction.
• Weekend and holiday adjustments apply
  If a due date falls on a weekend or legal holiday, it typically moves to the next business day.
• You must file even if no tax is due
  “Zero returns” are still required, even if there was no interstate travel or taxable fuel used.
• Late filings can trigger penalties and interest
  Missing a deadline may result in financial penalties, interest charges, and potential compliance issues.
• Accurate records are essential
  Organized mileage logs, fuel receipts, and trip records are critical for accurate reporting and audit readiness.

What Happens If You Miss the IFTA Filing Deadline?

Missing an IFTA filing deadline can lead to penalties, interest, and compliance issues with your base jurisdiction—even if no tax is owed.

In most jurisdictions, the standard penalty is $50 or 10% of the net tax due (whichever is greater), plus interest on any unpaid balance.

Repeated late filings or ongoing non-compliance can result in:

• Suspension of your IFTA license
• Additional enforcement actions
• Increased audit risk

It’s also important to note that penalties can apply even if:

• No tax is due
• The return shows a credit
• The filing is only a few days late

This is because IFTA requires a return to be filed every reporting period, regardless of tax liability. Since IFTA is administered through your base jurisdiction, specific penalty structures and enforcement practices may vary slightly by state.

What Records & Information Are Required to Generate an IFTA Report?

Generating an accurate IFTA report starts with having the right records organized throughout the quarter. Since reporting is based on both mileage and fuel across jurisdictions, incomplete or inconsistent records can lead to errors and compliance issues.

At a minimum, carriers need the following:

1. Business & IFTA Account Information

This identifies the carrier and determines where the return is filed. You’ll need:

• Business name and address
• EIN and contact details
• Base jurisdiction
• IFTA license or account number

2. Vehicle Information

This ensures mileage and fuel data are tied to the correct vehicle.You’ll need:

• Truck or unit number
• Vehicle type
• Fuel type
• Fleet number (if applicable)
• Make and model

3. Mileage & Trip Records

Mileage tracking is a core part of IFTA reporting. Carriers should maintain:

• Beginning and ending odometer readings
• Total miles traveled
• Miles driven in each jurisdiction
• Trip dates and routes

This data is used to calculate taxable miles across states and provinces.

4. Fuel Purchase Records

Fuel receipts must be complete and properly maintained throughout the quarter. Each receipt should include:

• Purchase date
• Seller’s name and location
• Number of gallons purchased
• Fuel type
• Total amount paid

These records are used to verify tax-paid fuel and support your calculations during reporting and audits.

5. Total Fuel and Mileage Summaries

To complete the quarterly return, carriers also need:

• Total taxable and non-taxable miles
• Total gallons of fuel consumed
• Fleet MPG calculations
• Fuel purchased in each jurisdiction

These totals determine whether additional fuel tax is owed or if the carrier receives a credit balance.

Using Digital Tools for IFTA Reporting

Many carriers now use ELD integrations or electronic IFTA reporting systems to automatically track jurisdiction-level mileage, fuel purchases, and trip records.

This reduces manual calculations, improves accuracy, and helps minimize reporting errors.

How to File IFTA Tax Reports

Filing an IFTA tax report is the process of calculating where your vehicles operated, how much fuel was purchased, and whether additional fuel tax is owed across jurisdictions.

The return is submitted through your base jurisdiction, which then distributes the appropriate taxes to participating states and provinces.

Here’s how the filing process typically works:

Step 1: Gather Your Mileage and Fuel Data

Start by organizing the records for every qualified vehicle operated during the quarter.

This typically includes:

• Trip sheets or mileage logs
• Beginning and ending odometer readings
• Fuel receipts showing gallons purchased, fuel type, and purchase location

Having complete records upfront makes the reporting process significantly easier and helps reduce calculation errors.

Step 2: Calculate Jurisdiction Mileage and Fuel Usage

Next, calculate:

• Total miles traveled during the quarter
• Miles driven in each IFTA jurisdiction
• Total gallons of fuel purchased
• Average fleet MPG (miles per gallon)

IFTA reporting is based on comparing where fuel taxes were paid versus where the vehicle actually operated. If a vehicle traveled more miles in a jurisdiction than the fuel purchased there supports, additional tax may be due.

Step 3: Complete the Quarterly IFTA Return

Once your calculations are complete, enter the information into your jurisdiction’s IFTA filing system.

The return generally includes:

• Taxable miles by jurisdiction
• Tax-paid fuel purchased
• Total fuel consumed
• Net tax due or credit balance

In some cases, carriers may receive a credit that offsets taxes owed in other jurisdictions.

Step 4: Submit the Return Before the Deadline

The completed return and any tax payment must be submitted by the quarterly IFTA filing deadline to avoid penalties and interest.

Most jurisdictions still require a return even if:

• No tax is owed
• No interstate operations occurred
• Zero miles are being reported

To simplify the process, many carriers now use ELD-integrated or electronic IFTA reporting systems to automatically track mileage by state, organize fuel records, and reduce manual reporting work.

Final Thoughts on IFTA Due Dates

Keeping up with IFTA due dates becomes much easier when mileage records, fuel receipts, and reporting are managed consistently throughout the quarter.

Because IFTA follows a fixed quarterly schedule, staying ahead of deadlines helps reduce last-minute filing pressure, avoid penalties, and keep operations running smoothly across jurisdictions.

Whether you operate a single truck or manage an entire fleet, a consistent reporting process makes quarterly IFTA filing more accurate, predictable, and easier to manage over time.