Understanding the New Mexico Weight Distance Tax Permit (WDT)

Nov. 19, 2025, 6:23 p.m.
The New Mexico Weight Distance Tax (WDT) is one of the most important compliance requirements for commercial carriers operating in the state. Any motor vehicle that travels on New Mexico highways and meets certain weight thresholds must register, report mileage, and pay this tax. Failure to comply can lead to steep penalties and delays at ports of entry.
New Mexico Weight Distance Tax Permit

What Is the New Mexico Weight Distance Tax?

The WDT is a tax charged to commercial truck owners based on:

  • Vehicle weight, and

  • Miles traveled on New Mexico roads.

This tax helps maintain state highways due to the impact of heavier vehicles.

Who Needs a New Mexico WDT Permit?

You must register for a Weight Distance Tax Permit if your vehicle is:

  • Over 26,000 pounds gross vehicle weight (GVW), or

  • Combination trucks over 26,000 pounds (truck + trailer total weight)

Both New Mexico-based and out-of-state carriers are required to comply.

Types of WDT Accounts

New Mexico offers two types of WDT accounts:

1. Permanent WDT Account

  • Used by carriers that frequently travel through New Mexico

  • Must file mileage reports quarterly

  • Must pay tax based on weight bracket and miles driven

2. Temporary WDT Permit

  • Used for one-time or occasional trips

  • Typically valid for a single trip into/through the state

  • Purchased at the port of entry or through authorized services

How to Register for a New Mexico WDT Permit

Carriers can register by:

  1. Going to the  https://www.newmexicotruckingonline.com/

  2. Creating a business account

  3. Registering their vehicle(s) under the correct weight class

  4. Activating the WDT account and obtaining a WDT number

You will typically need:

  • USDOT number

  • VIN numbers

  • Truck/tractor plate information

  • Vehicle weight details

Mileage Reporting Requirements

Carriers must submit quarterly reports showing:

  • Total New Mexico miles driven

  • Each vehicle’s weight class

  • Distance driven per vehicle

Reports must be submitted even if no miles were driven (zero-mile report).

Penalties for Non-Compliance

Failing to register or pay WDT may result in:

  • Fines and late penalties

  • Interest charges

  • Vehicle detention at New Mexico ports of entry

  • Possible denial of future permits

Exemptions

Some vehicles may be exempt, including:

  • School buses

  • Fire trucks and other emergency vehicles

  • Government-owned vehicles

  • Light vehicles under 26,000 lbs GVW

Tips for Carriers

  • Keep detailed mileage logs for all NM trips

  • File quarterly reports on time to avoid penalties

  • Verify your WDT status before entering New Mexico ports of entry

  • Maintain accurate vehicle weight documentation