IFTA Filing Guide for Trucking Companies: Deadlines, Requirements, and How to Avoid Penalties

For trucking companies operating across state lines, staying compliant with the International Fuel Tax Agreement (IFTA) is non‑negotiable. Whether you’re a new venture or an established carrier, understanding when and how to file your IFTA reports is essential to avoiding costly penalties, audits, or even suspension of your operating privileges.

At Narvaez Insurance Services, we work closely with trucking companies throughout California and beyond, helping them stay compliant with permits, filings, and insurance requirements. Here’s what you need to know about managing your IFTA obligations.

What Is IFTA?

The International Fuel Tax Agreement is a cooperative agreement between the lower 48 U.S. states and Canadian provinces. It simplifies how fuel taxes are reported and paid by interstate motor carriers.

If your vehicle meets the qualifications for IFTA—typically a truck over 26,000 pounds GVWR or with three or more axles—you must obtain an IFTA license and file quarterly fuel tax returns.

When Does a Trucking Company Need to File IFTA?

IFTA returns must be filed every quarter, even if:

• You did not operate
• You did not travel outside your home state
• You purchased no fuel

Quarterly IFTA filing deadlines are:

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

Missing these deadlines can lead to significant fines, interest charges, or even suspension of your IFTA license—preventing you from operating legally across state lines.

What Information Do You Need to File?

Your quarterly IFTA filing requires accurate tracking of:

• Total miles driven in each state or province
• Total gallons of fuel purchased
• Miles per gallon (MPG) calculations
• Trip sheets or electronic logs
• Receipts or verified fuel purchase records

Carriers are required to maintain detailed operational records for at least four years in case of an audit.

What Happens If You Don’t File IFTA on Time?

Failing to file or pay IFTA taxes can result in:

• Late fees(often a flat penalty per return)
• Interest charges on unpaid taxes
• Suspension of your IFTA license or decals
• Impoundment or fines during roadside inspections
• Being placed out of service until penalties are resolved

States take IFTA compliance seriously, and delays—even unintentional ones—can cause major issues for your trucking operation.

How to Stay Compliant and Avoid Penalties

Here are best practices to keep your business on track:

• Keep accurate trip logs using ELD systems or mileage‑tracking software
• Organize fuel receipts with clear dates, locations, and gallons purchased
• Review MPG for inconsistencies before submitting reports
• Schedule quarterly reminders to avoid missing filing deadlines
• Work with a compliance specialist who understands IFTA and state regulations

Narvaez Insurance Services Can Help

Managing a trucking business is complex enough—your compliance requirements shouldn’t slow you down. At Narvaez Insurance Services, we assist carriers with the insurance, filings, and permits required to stay operational and penalty‑free.

Whether you’re a new venture or a growing fleet, we can walk you through IFTA requirements and ensure that your business remains in good standing all year long.

Call us at (707) 927‑3204 or email us at info@narvaezins.com for help with trucking compliance and insurance.