What Is the New Mexico Weight-Distance Tax?
The Weight-Distance Tax (WDT) is a mileage-based tax imposed on commercial vehicles operating on New Mexico highways. Instead of relying solely on fuel taxes, New Mexico calculates taxes based on:
- Vehicle weight
- Distance traveled within the state
This system applies primarily to heavier commercial vehicles.
Who Must Pay WDT?
You are required to pay WDT if:
- Your vehicle has a declared gross weight over 26,000 pounds
- You operate a commercial vehicle in New Mexico
- You travel on public highways within the state
Both New Mexico-based and out-of-state carriers must comply.
How WDT Is Calculated
The tax is calculated using two main factors:
- Declared Gross Vehicle Weight (GVW)
- Total miles traveled in New Mexico
Heavier vehicles pay a higher rate per mile. Carriers must choose a declared weight category when registering, which determines their tax rate.
Filing Requirements
Carriers must:
- File monthly WDT reports
- Report total miles traveled in New Mexico
- Pay taxes due based on reported mileage
Even if no miles were traveled, a zero report may still be required.
How to File WDT
WDT reports can be filed through the New Mexico Taxation and Revenue Department (TRD).
Carriers may:
- File online via the state portal
- Use third-party permit service providers for assistance
Penalties for Non-Compliance
Failure to comply with WDT requirements can result in:
- Late filing penalties
- Interest on unpaid taxes
- Account suspension
- Citations at ports of entry or roadside inspections
Recordkeeping Requirements
Carriers must maintain accurate records for at least 3 years, including:
- Trip reports (origin, destination, routes)
- Mileage logs
- Fuel receipts
- ELD or GPS data
These records must support all reported mileage in case of an audit.
WDT vs IFTA: What’s the Difference?
Many carriers confuse WDT with IFTA, but they are not the same:
- WDT: Mileage-based tax specific to New Mexico
- IFTA: Fuel tax reporting across multiple jurisdictions
Carriers operating interstate may be subject to both.
Tips for Staying Compliant
-
Use ELDs or GPS systems for accurate mileage tracking
- File reports on time every month
- Double-check declared weight categories
- Keep detailed and organized records
- Work with a permit service provider to reduce errors
How We Can Help
Managing New Mexico WDT can be time-consuming and complex. Our team provides:
- Accurate mileage reporting assistance
- Timely filing of WDT returns
- Full compliance support
- Ongoing account management
We help you stay compliant so you can focus on running your business.