# Kentucky KYU Permit: Weight-Distance Tax for Heavy Vehicles

Canonical: https://www.fastpermitfiling.com/guides/kyu-permit-guide
Category: State Permits
Published: 2026-04-24
Updated: 2026-05-02
Read time: 6 min read

> The Kentucky KYU permit is required for vehicles with combined gross weight of 59,999 lbs or more operating on Kentucky roads. Learn who owes it, how quarterly reporting works, and why it is separate from IRP.

## TL;DR

> The Kentucky KYU permit is required for vehicles with combined gross or licensed weight of 59,999 lbs or more on Kentucky roads. Filed quarterly through the Motor Carrier Connect portal; separate from IRP and IFTA.

## Key takeaways

- Threshold: combined gross or licensed weight of 59,999 lbs.
- Administered by the Kentucky Transportation Cabinet.
- Quarterly returns through the Motor Carrier Connect portal.
- KYU is separate from IRP plates and IFTA fuel-tax reporting.
- Loaded or empty does not matter — weight class triggers the obligation.

## Cited entities

- Kentucky Weight-Distance (KYU) Tax (https://drive.ky.gov/motor-carriers/Pages/KYU-Tax.aspx)
- International Registration Plan (https://en.wikipedia.org/wiki/International_Registration_Plan)
- International Fuel Tax Agreement (https://en.wikipedia.org/wiki/International_Fuel_Tax_Agreement)
- Federal Motor Carrier Safety Administration (https://www.fmcsa.dot.gov/)

## FAQ

### Who needs a KYU permit?

Any motor carrier operating a commercial vehicle with a combined gross or licensed weight of 59,999 lbs or more on Kentucky roads needs a KYU (Kentucky Unified Carrier) permit. The threshold applies regardless of whether the carrier is interstate or intrastate, and regardless of whether the vehicle is loaded or running empty.

### Is the KYU permit the same as IRP or IFTA?

No. IRP apportions plates across states; IFTA handles fuel tax. The KYU is a Kentucky-specific weight-distance tax that operates independently. A carrier subject to KYU has to file KYU returns on top of any IRP and IFTA obligations — "I have IRP" is not a valid defense at a Kentucky weigh station.

### How often are KYU returns filed?

KYU liability is reported on a quarterly schedule with the Kentucky Transportation Cabinet. Filing is done through the state's online Motor Carrier Connect portal. Current due dates and any per-mile rate in effect should be verified with the state DOT before filing.

### How is the KYU tax calculated?

KYU is a mileage-based tax: the carrier reports total Kentucky miles and multiplies by the current per-mile rate set by the Kentucky Transportation Cabinet. Because the rate can change, carriers should confirm the applicable rate for the quarter being filed rather than rely on a prior-year figure.

### What happens if I operate in Kentucky without a KYU permit?

Kentucky enforcement can issue a citation at the weigh station, assess the unpaid tax plus interest and penalties, and place the vehicle out-of-service until the violation is cured. KYU violations are also reported to FMCSA, which affects the carrier's CSA score.

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Full article: https://www.fastpermitfiling.com/guides/kyu-permit-guide