Who Needs a New Mexico Weight Distance Permit?
A carrier should pay particular attention to the following:
- Truck or truck combination over 26,000 lbs. — The vehicle is generally subject to New Mexico's WDT requirements.
- Interstate carriers — An IRP-registered vehicle operating in New Mexico may satisfy the registration component, but the carrier still needs to comply with New Mexico's WDT requirements.
- New Mexico-based intrastate trucks — Vehicles over 26,000 lbs. generally use a Weight Distance/WD registration and require the applicable WDT permit.
- Farm trucks — Being a farm vehicle does not automatically exempt a truck over 26,000 lbs. from WDT.
What Does the Permit Cover?
The Weight Distance Tax is based on the vehicle's weight and the miles traveled on New Mexico highways. New Mexico requires companies subject to the tax to register and obtain a Weight Distance Tax Electronic Permit for each applicable vehicle each year.
The permit is different from an oversize/overweight permit. An oversize/overweight permit addresses authorization to operate outside normal size or weight limits, while the WDT permit is associated with New Mexico's highway-use tax system.
What About Trucks Under 26,001 Pounds?
A truck at 26,000 pounds or less is generally outside the New Mexico WDT threshold. However, other New Mexico requirements may still apply depending on the vehicle, registration, fuel use, and trip. New Mexico also has separate trip permit and fuel permit requirements in certain circumstances.
Important 2026 Update
New Mexico increased its Weight Distance Tax rates by 35% effective July 1, 2026, so carriers operating under the WDT system should make sure they are using current rates and filing requirements.
Bottom line: If a commercial truck or combination has a declared/gross weight over 26,000 pounds and travels on New Mexico highways, the carrier should determine its WDT registration and permit obligations before operating in the state.