What Is a KYU Permit?
A Kentucky Highway Use (KYU) Permit is a tax account issued by the Kentucky Transportation Cabinet. It is required for many commercial motor carriers operating vehicles with a gross vehicle weight of 59,999 pounds or more on Kentucky highways.
The KYU permit allows Kentucky to collect its Highway Use Tax, which is based on the number of miles a qualifying vehicle travels within the state.
Carriers that generally need a KYU Permit:
- Interstate trucking companies
- Intrastate carriers operating qualifying heavy vehicles
- Owner-operators hauling freight in Kentucky
- Fleet operators with vehicles meeting Kentucky's weight threshold
Once registered, carriers are required to:
- File periodic mileage reports
- Pay Kentucky Highway Use Tax
- Keep accurate mileage records
What Is an IRP Trip Permit?
An IRP Trip Permit is a temporary registration permit issued to commercial vehicles that are not registered under the International Registration Plan (IRP).
Instead of maintaining annual apportioned registration, carriers making occasional trips into Kentucky can purchase a temporary IRP Trip Permit that authorizes operation for a limited time.
An IRP Trip Permit is commonly used by:
- Out-of-state carriers
- Owner-operators making one-time deliveries
- Trucks awaiting permanent IRP registration
- Carriers that rarely travel through Kentucky
The Key Difference
The biggest difference is simple:
- KYU Permit = Highway Use Tax registration based on mileage traveled in Kentucky.
- IRP Trip Permit = Temporary vehicle registration allowing legal operation without annual IRP registration.
One deals with tax reporting, while the other deals with vehicle registration.
Side-by-Side Comparison
| KYU Permit | IRP Trip Permit |
|---|---|
| Highway Use Tax account | Temporary vehicle registration |
| Required for many vehicles 59,999 lbs. and over | For vehicles not registered under IRP |
| Requires mileage reporting | No ongoing mileage reporting under the permit itself |
| Long-term compliance program | Temporary permit for limited travel |
| Based on Kentucky highway use | Allows temporary interstate operation |
Can You Need Both?
Yes.
Many carriers entering Kentucky may need:
- A KYU Permit (if their vehicle meets Kentucky's Highway Use Tax requirements), and
- An IRP Registration or, if not IRP-registered, an IRP Trip Permit.
These requirements are separate and one does not replace the other.