How to Register and Set Up IFTA in New Mexico

To set up an International Fuel Tax Agreement (IFTA) account in New Mexico, you must register through the New Mexico Taxation and Revenue Department (TRD). Carriers must apply if they operate qualified motor vehicles—those having two axles and a gross vehicle weight exceeding 26,000 pounds, having three or more axles regardless of weight, or used in a combination exceeding 26,000 pounds—in at least one other IFTA jurisdiction. The state does not charge a fee for the IFTA license or the two required decals, but you must have a valid New Mexico Combined Reporting System (CRS) number and a USDOT number registered to a New Mexico physical address. New Mexico is unique because it is one of four states that also mandates a Weight Distance Tax (WDT) in addition to IFTA requirements. The process involves submitting Form RPD-41388 (Application for IFTA) and ensuring your vehicle is registered under the International Registration Plan (IRP). DispatchTool simplifies this administrative burden by automatically compiling the jurisdictional mileage and fuel purchase data required for New Mexico’s quarterly filings. You can create a DispatchTool account to generate the trip sheets and summaries needed for accurate tax reporting without manual calculation errors.

Determine Your Vehicle Eligibility

Before applying, you must verify that your fleet meets the definition of a 'qualified motor vehicle' under New Mexico statute. This includes any power unit used, designed, or maintained for the transportation of persons or property that has a gross vehicle weight or registered gross vehicle weight over 26,000 pounds (11,797 kilograms). It also covers power units with three or more axles, regardless of weight, or combinations where the total weight exceeds the 26,000-pound threshold. If your operations are strictly intrastate within New Mexico, you do not need an IFTA license, though you will still need to comply with state-specific weight-distance tax regulations for vehicles over 26,000 pounds.

Establishing a New Mexico Business Account

New Mexico requires carriers to be registered with the Taxation and Revenue Department for a Combined Reporting System (CRS) identification number before applying for IFTA. This number is used for reporting gross receipts, compensating, and withholding taxes. You can obtain a CRS number online through the Taxpayer Access Point (TAP) portal. You must provide your Federal Employer Identification Number (FEIN) or Social Security Number (SSN), the physical address of your business operations in New Mexico, and proof that the fleet is base-registered in the state. The TRD uses this information to link your fuel tax account to your legal business entity.

Submitting Form RPD-41388

The primary document for setup is the Application for International Fuel Tax Agreement (IFTA) License, known as Form RPD-41388. This four-page document requires details on your fleet, including the number of IFTA decals requested and your USDOT number. Unlike many other states, New Mexico does not currently charge for the annual license or the pair of decals required for each vehicle. The application asks for your bulk fuel storage capacity if applicable, as well as your IRP account number. Applications can be mailed to the Motor Transportation Bureau in Santa Fe or submitted electronically through the TAP portal for faster processing, which usually takes 7 to 10 business days.

Understanding New Mexico Weight Distance Tax Interaction

It is critical for New Mexico carriers to distinguish between IFTA and the Weight Distance Tax (WDT). While IFTA covers fuel use across all member jurisdictions, the WDT is a separate tax paid to New Mexico for the use of its highways by vehicles over 26,000 pounds. The WDT rate ranges from $0.00847 to $0.04378 per mile based on the gross vehicle weight. When setting up your IFTA account, you should simultaneously ensure you have a WDT identification number. You will file quarterly IFTA returns to reconcile fuel taxes and separate quarterly WDT returns to pay for miles driven specifically on New Mexico roads.

Quarterly Filing and Compliance Dates

Once your account is set up, you are required to file quarterly tax returns even if no taxable fuel was used or no miles were driven during the period. The reporting quarters end on March 31, June 30, September 30, and December 31. Returns and full payments must be postmarked or submitted online by the last day of the month following the end of the quarter. For example, the first-quarter return is due by April 30. Failure to file on time results in a penalty of $50.00 or 10% of the net tax due, whichever is greater, plus interest calculated at 1% per month.

Record Keeping and Decal Placement

New Mexico requires carriers to maintain detailed records for four years from the filing date. These records must include individual vehicle distance records (IVDR), showing the date of the trip, origin and destination, routes of travel, and odometer readings at jurisdiction borders. You must also keep all original receipts for tax-paid fuel purchases, which must include the fuel type, price per gallon, and the number of gallons purchased. Decals must be placed on both sides of the exterior of the cab; failure to display current year decals can result in a citation and a requirement to purchase a $5.00 to $25.00 temporary fuel permit at a port of entry.

Annual License Renewal Process

IFTA licenses in New Mexico expire on December 31 each year. The renewal period typically opens in October. To be eligible for renewal, you must be in good standing with the TRD, meaning all quarterly returns for IFTA and WDT must be filed and all taxes, penalties, and interest paid in full. There is a two-month 'grace period' (January and February) for displaying the new year's decals, provided you have a valid current-year license in the cab. If you do not renew by December 31, your account may be suspended, requiring a new application and potential bond requirements.

Sources

New Mexico Taxation and Revenue Department (2024) — https://www.tax.newmexico.gov/trucking-industry/international-fuel-tax-agreement-ifta/ IFTA, Inc. Jurisdictional Manual (2025) — https://www.iftach.org/ New Mexico Motor Transportation Bureau (2024) — https://www.tax.newmexico.gov/trucking-industry/weight-distance-tax/

Frequently asked

How much does an IFTA license cost in New Mexico?

New Mexico does not charge a fee for the IFTA license or the two decals provided for each qualified vehicle. However, you must maintain a valid CRS and USDOT number to remain eligible for these free credentials.

What happens if I don't have an IFTA license in New Mexico?

If you operate a qualified motor vehicle in New Mexico without an IFTA license or a valid temporary fuel permit, you may be fined. Temporary permits usually cost roughly $5.00 to $25.00 depending on the trip duration and are available at ports of entry.

Can I apply for IFTA online in New Mexico?

Yes, you can apply for an IFTA account and manage your quarterly filings through the New Mexico Taxpayer Access Point (TAP) website. This is the fastest way to receive your decals, typically reducing wait times to under 10 days.

Is the New Mexico Weight Distance Tax included in IFTA?

No, the Weight Distance Tax is separate. While IFTA handles fuel tax redistribution, the WDT is a specific New Mexico tax ranging from $0.00847 to $0.04378 per mile that must be filed independently of your IFTA return.

How long should I keep my IFTA records?

The New Mexico Taxation and Revenue Department requires you to maintain all mileage and fuel records, including receipts and trip logs, for a period of 4 years from the date the tax return was due or filed.