Apply for a Kentucky KYU Number

Jan. 3, 2026, 3:19 p.m.
If your trucking business operates in Kentucky, one of the first steps for compliance is obtaining a Kentucky KYU Number. This number is required for commercial motor carriers traveling in Kentucky, and it ensures that your fleet pays the proper weight-mile taxes.
Kentucky KYU Number

What Is a Kentucky KYU Number?

A KYU Number is a tax identification number issued by the Kentucky Transportation Cabinet for commercial vehicles operating in the state.

Key points:

  • Required for vehicles with a gross weight of 26,001 lbs or more.

  • Used to track weight-distance taxes for intrastate and interstate carriers.

  • Must be renewed annually, even if fleet size does not change.

Who Needs a KYU Number?

You must obtain a KYU Number if you operate:

  • Trucks, tractors, or trailers with 26,001 lbs GVWR or higher

  • For-hire carriers operating in Kentucky

  • Vehicles not apportioned in IRP, but traveling in Kentucky

Exemptions include:

  • Farm and agricultural vehicles under certain weight limits

  • Vehicles registered for personal use only

  • Certain government vehicles

Step-by-Step Guide to Apply

1. Gather Required Information

Before applying, collect:

  • Vehicle information (VIN, make, model, weight)

  • USDOT and MC numbers

  • Business and contact information

  • Estimated mileage in Kentucky

2. Access the KYU Application Portal

Visit the official Kentucky Trucking Online portal to begin your application.

3. Complete the Application Form

Include:

  • Fleet and vehicle details

  • Mileage estimates

  • Owner/operator information

Double-check all information against your USDOT and IRP records to avoid delays.

4. Calculate and Pay Fees

KYU fees are calculated based on:

  • Vehicle weight

  • Estimated miles traveled in Kentucky

  • Number of vehicles in the fleet

Payments are typically accepted online via credit card or electronic check.

5. Submit and Receive Your KYU Number

Once your application is processed:

  • You will receive your KYU Number

  • Display it on your cab card or in the vehicle documentation as required

Tips for a Smooth Application

 Verify all vehicle weights are accurate
 Estimate mileage conservatively to prevent underpayment penalties
 Apply before your first trip in Kentucky
 Update your KYU Number if fleet size changes

Penalties for Non-Compliance

Operating without a KYU Number can result in:

  • Fines and citations at weigh stations

  • Back taxes based on estimated mileage

  • Delays in commercial operations

Kentucky KYU Number