IFTA Fuel Tax Compliance in Arizona

The International Fuel Tax Agreement (IFTA) in Arizona is managed by the Arizona Department of Transportation (ADOT) Motor Vehicle Division (MVD). This tax-sharing agreement simplifies fuel tax reporting for interstate motor carriers by allowing them to file one quarterly return to their base jurisdiction. In Arizona, any motor carrier operating a qualified motor vehicle that travels between Arizona and at least one other IFTA jurisdiction must obtain an IFTA license and decals. A qualified motor vehicle is defined as having two axles and a gross vehicle weight exceeding 26,000 pounds, having three or more axles regardless of weight, or being used in a combination where the total weight exceeds 26,000 pounds. Filing correctly is critical to avoiding Arizona’s specific penalties and interest charges. Carriers must track all miles driven and fuel purchased across the United States and Canada, then reconcile these figures against the current tax rates of each state. DispatchTool assists Arizona carriers by automating the collection of mileage data across state lines and organizing fuel receipts for each quarter. This ensures that the distance traveled on Arizona Route 66 or I-10 is accurately separated from mileage in neighboring New Mexico or California for precise IFTA reporting. Carriers can sign up for a DispatchTool account to start organizing their trip records for the upcoming tax deadline.

Arizona IFTA Registration and Licensing Fees

To register for IFTA in Arizona, carriers must have an established place of business in the state and their fleet must be based in Arizona for registration purposes. The Arizona Department of Transportation does not charge an application fee for the initial IFTA license; however, there is a fee of $8.00 per set of two decals. Every qualified vehicle in the fleet requires one set of decals, which must be displayed on both sides of the exterior of the cab. Licenses are valid for one calendar year, expiring on December 31. Carriers should apply for renewals by November 30 to ensure they receive their new credentials before the January 1 deadline. Failure to display current decals can result in a citation and a fine of $100.00 or more per vehicle depending on the municipality.

Quarterly Filing Deadlines and Arizona Penalties

Arizona IFTA returns are due on the last day of the month following the close of the reporting quarter. Specifically, the Q1 deadline is April 30, Q2 is July 31, Q3 is October 31, and Q4 is January 31. If the deadline falls on a weekend or legal holiday, the return is due the next business day. According to ADOT, late filings or underpayments incur a penalty of $50.00 or 10% of the net tax due, whichever is greater. Furthermore, interest is charged on all delinquent taxes at a rate of 1% per month. Even if a carrier did not operate their vehicle during a quarter, they must still file a 'zero' return to remain in compliance and avoid a failure-to-file penalty.

Arizona Fuel Tax Rates and Surcharges

As of 2024, the Arizona motor vehicle fuel tax rate for diesel is $0.26 per gallon and $0.18 per gallon for gasoline. These rates are combined with the rates of other jurisdictions where the vehicle traveled to determine the total tax liability or credit. For example, if an Arizona-based truck purchases a large volume of fuel in a state with a higher tax rate than Arizona, the carrier may be eligible for a tax credit. Conversely, if fuel is purchased in a low-tax state but most miles are driven in a high-tax state, the carrier will owe the difference. The ADOT MVD uses these figures to redistribute funds to the states where the fuel was actually consumed.

Record Keeping Requirements for Arizona Carriers

Arizona carriers must maintain detailed records for a period of four years from the filing date or the due date, whichever is later. These records must include Individual Vehicle Mileage Records (IVMR), which track the date of the trip, origin and destination, routes of travel, and odometer readings at state lines. Additionally, carriers must keep all original fuel receipts or invoices. A valid receipt must show the date of purchase, name and address of the seller, number of gallons purchased, fuel type, and the price per gallon. If a carrier is audited by ADOT and lacks sufficient records, the agency may assess a tax liability based on a standard 4.0 miles per gallon (MPG) average, which often results in significantly higher tax bills than actual usage would dictate.

The IFTA Audit Process in Arizona

The Arizona Department of Transportation is required by the IFTA Articles of Agreement to audit at least 3% of its licensed base jurisdictions every year. During an audit, an ADOT auditor will verify the distance and fuel records for the previous four years to ensure accuracy. If errors are found, the auditor will calculate the corrected tax due, apply penalties, and add interest at the standard 1% monthly rate. Common triggers for an audit include consistent filing of low MPG (under 4.0), significant fluctuations in reported mileage, or failing to file a return for one or more quarters. Maintaining digital backups of all logs and receipts is the best defense against negative audit findings.

Arizona Use Fuel Tax and Exemptions

Under Arizona Revised Statute § 28-5606, fuel used by certain vehicles may be exempt from the standard fuel tax or eligible for a refund. This includes fuel used by vehicles for non-highway purposes, such as stationary power take-off (PTO) units that run mixers, pumps, or refrigeration units. However, for IFTA reporting purposes, the total fuel consumed must be reported, and the carrier must provide proof of the non-highway usage to claim an exemption. Arizona does not provide a standard percentage for PTO usage; carriers must instead use a metering device or a documented study to prove the exact amount of fuel diverted from the drive engine to the auxiliary equipment.

Sources

Arizona Department of Transportation (ADOT) (2024) — https://azdot.gov/motor-vehicle-services/commercial-transportation/fuel-tax-information/ifta International Fuel Tax Association, Inc. (2024) — https://www.iftach.org/ Arizona Revised Statutes (ARS) Title 28 (2024) — https://www.azleg.gov/ars-title-28/

Frequently asked

What is the penalty for not filing IFTA in Arizona?

Arizona imposes a late filing penalty of $50.00 or 10% of the total tax due, whichever is higher. Additionally, interest accrues at a rate of 1% per month until the balance is paid in full.

Do I need an IFTA license if I only drive within Arizona?

No, if you operate exclusively within the state of Arizona, you do not need an IFTA license. You only need an IFTA license if your vehicle exceeds 26,000 lbs GVW and you cross state or national borders into other IFTA jurisdictions.

How much do Arizona IFTA decals cost?

In Arizona, IFTA decals cost $8.00 per set of two. Each qualified motor vehicle in your fleet must have one set of decals replaced annually.

How long must I keep my fuel receipts in Arizona?

Per ADOT regulations and IFTA guidelines, you must retain your fuel receipts and mileage records for a minimum of four years from the date the return was filed or due.