Federal vs state
Federal MC authority + USDOT lets a carrier cross state lines. State-specific permits are required where the carrier operates with certain weight or commodity profiles. Most state permits exist outside the IFTA/IRP framework and require separate registration.
Carriers that drive a few crossings per year often skip state permits, get caught at a roadside inspection, and face penalties + back-fees. The state permit list is small enough to manage but easy to miss.
The major state permits
New York Highway Use Tax (HUT) - every commercial vehicle 18,000+ lbs operating on NY highways. Application + decals; quarterly reporting. New Mexico Weight Distance Tax (WDT) - every commercial vehicle 26,000+ lbs operating in NM. Quarterly reports. Kentucky KYU - every commercial vehicle 60,000+ lbs operating in KY. Annual fee + decals.
Oregon Weight-Mile Tax - every commercial vehicle 26,000+ lbs operating in OR. Monthly reporting. Connecticut Highway Use Fee (HUF, 2023+) - every commercial vehicle 26,000+ lbs operating in CT. Monthly reporting. Massachusetts DPU intrastate - required for intrastate-only carriers (rare for interstate carriers).
How to manage permits
A single-truck owner-operator running only the southeastern corridor likely needs no state permits. A regional carrier running the I-95 corridor needs NY HUT, CT HUF. A cross-country fleet running 26,000+ lb trucks likely needs all six.
Permits are issued by each state's department of revenue or department of transportation. Some have online portals; some still require mail-in application. Plan 7–14 days lead time for new applications.