New Mexico Weight Distance Tax Guide

New Mexico’s WDT is administered by the Taxation and Revenue Department’s Motor Vehicle Division, with the Motor Transportation Police collecting trip tax from unpermitted vehicles at the ports of entry. The structure is annual permit plus quarterly return — and it comes with the most explicitly documented one-way-hauler discount in the country.

Who owes it, and the annual permit

The state’s definition covers registrants, owners and operators of most motor vehicles with a declared gross weight over 26,000 pounds using New Mexico highways. Companies must register and apply each year for a Weight Distance Tax Electronic Permit for each vehicle — issued through TAP, the Taxpayer Access Point, which also handles the quarterly returns (single or bulk filing).

Vehicles not registered for the permit that haul for hire pay a trip tax instead — based on weight and New Mexico miles, typically collected at a port of entry, with prepaid permits sold in increments of no less than $50.

Mill rates and the 45% one-way rule

The per-mile rate — New Mexico calls it a mill rate — depends on the vehicle’s weight and on whether it qualifies as a one-way hauler. The exact schedule lives in the Weight Distance Tax Act (Section 7-15A-6 NMSA 1978) and prints on the quarterly report.

The one-way discount has a precise gate, straight from the administrative code: only vehicles the operator can reasonably expect, at registration time, to run forty-five percent or more of their New Mexico miles empty may qualify as one-way haul vehicles. Fall below 45% empty in practice and the tax recomputes at the standard schedule. Dump, livestock, and produce haulers with genuinely empty backhauls are the classic qualifiers.

The 2290 connection New Mexico prints itself

New Mexico is the one weight-distance state that spells out the federal layer on the same page: vehicles at 55,000 pounds or more must also file the federal Heavy Vehicle Use Tax and provide proof to the MVD at registration by submitting an IRS-stamped copy of the Form 2290. The WDT permit and the Schedule 1 are separate documents for separate taxes — and a New Mexico registration visit for a heavy truck needs both.

Quarterly WDT due dates: April 30, July 31, October 31, and January 31 — the same calendar as IFTA, which makes it natural to close both filings in the same sitting each quarter.

Frequently asked questions

What is a New Mexico mill rate?⌄

The cents-per-mile rate for the Weight Distance Tax. It depends on the vehicle’s weight and on whether it qualifies for one-way (versus two-way) hauling rates — the current schedule is set by statute and printed on your quarterly tax report.

How do I qualify for New Mexico’s one-way haul rates?⌄

At registration, you must reasonably expect the vehicle to travel 45% or more of its New Mexico miles empty of all load. If actual empty miles come in under 45%, the tax is due at the standard rates instead of the reduced one-way schedule.

Do out-of-state trucks owe New Mexico WDT?⌄

Yes — the tax applies to intrastate and interstate vehicles over 26,000 pounds using New Mexico highways, whatever the base state. Permitted carriers file quarterly; unpermitted for-hire vehicles pay trip tax at the port of entry.

Does the WDT permit satisfy the IRS Form 2290?⌄

No — and New Mexico says so directly: vehicles at 55,000 pounds or more must file the federal HVUT separately and show the IRS-stamped 2290 to the MVD at registration. The WDT is a state per-mile tax; the HVUT is the annual federal tax.

Related guides

Official sources

Agency rules, fees and contacts can change — confirm current requirements with the agency before acting. This guide is general information for truckers, not tax or legal advice.

New Mexico’s Weight Distance Tax: Permits, Quarters, and the One-Way Discount