You got your authority, you booked a load through Louisville, and somewhere around the Kentucky line somebody asked you a question you’d never heard before: “What’s your KYU number?” If your answer was a blank stare, you’re in good company.
The KYU is one of the most commonly missed registrations in trucking, and Kentucky is not shy about penalizing carriers who run without it. Let’s break it down.
What a KYU Number Actually Is
A KYU number is your license for Kentucky’s Weight Distance Tax. It’s a tax on the miles you run on Kentucky highways, charged at $0.0285 per mile (that’s two and eighty-five hundredths cents) for qualifying vehicles.
Here’s the thing most new carriers get wrong: this is not a fuel tax. It has nothing to do with IFTA. Kentucky charges you for every mile your truck travels on its roads, whether you bought a single gallon of diesel there or not.
Kentucky is one of only four states that still runs a weight distance tax like this. New Mexico, New York, and Oregon are the others. Cross any of them without the right credential and you’ll learn about it the expensive way.
Who Needs a KYU Number?
Per the Kentucky Transportation Cabinet, you need a KYU license if you operate a vehicle with a combined license weight greater than 59,999 pounds on Kentucky roadways. In plain English: if you’re running at 60,000 pounds or more and you touch Kentucky pavement, you need one.
- It applies to interstate carriers. You don’t have to be based in Kentucky. An Indiana carrier running loads through Louisville on I-65 needs a KYU number just like a Bowling Green carrier does.
- Farm-plated vehicles are exempt.
- It’s per-company, not per-trip. Once you have your KYU number, it covers your operation. You just report and pay on the miles each quarter.
What the KYU Tax Actually Costs
The math is simple: Kentucky miles times $0.0285.
Real-World Example
Say you’re an owner operator running regular freight between Indianapolis and Nashville on I-65. That’s roughly 140 miles of Kentucky each way. Run it twice a week, and you’re looking at around 29,000 Kentucky miles a year. Your KYU tax: about $830. Annoying? Sure. Business-ending? No. What IS potentially business-ending is ignoring it, because the penalties stack up fast.
KYU vs IFTA vs IRP: Three Different Things
New carriers mix these up constantly, so here’s the cheat sheet:
| Credential | What It Is | What It Taxes |
|---|---|---|
| KYU | Kentucky Weight Distance Tax license | Miles driven on Kentucky roads (60,000+ lbs combined weight) |
| IFTA | International Fuel Tax Agreement | Fuel, apportioned by miles per state |
| IRP | International Registration Plan | Your plate and registration, apportioned by state |
Having IFTA does not cover you for KYU. Having IRP does not cover you for KYU. You can be 100% legal on fuel tax and registration and still get flagged in Kentucky, because the KYU is its own separate license with its own separate filing. We see this exact gap in new authority setups all the time.
One piece of good news: the record keeping overlaps. The same per-state mileage logs you already keep for IFTA are exactly what you need for your KYU return, and both file on a quarterly cycle. If your ELD or mileage software breaks out Kentucky miles, your quarterly KYU filing takes minutes, not hours. Set it up once and the tax becomes a calendar reminder instead of a headache.
How to Get a KYU Number
The good news: it’s free to register, and you can do it online.
Go to drive.ky.gov
The Kentucky Transportation Cabinet’s Motor Carrier Portal handles the whole thing online.
Create a KYID Account
That’s Kentucky’s login system. You’ll use it for your application and every quarterly filing after.
Complete the Online KYU Application
Skip the paper form if you can. Kentucky says mailed applications (form TC 95-1) take 10 to 14 business days to process. If you’ve got a Kentucky load next week, online is the only sane option.
File and Pay Quarterly
Report your Kentucky miles each quarter and pay online by credit card or ACH.
The Zero-Mile Trap: The $500 Mistake
Here’s the part that catches carriers even after they’ve done everything else right.
Once you hold a KYU license, you must file every quarter, even if you ran zero Kentucky miles. No travel does not mean no filing. Kentucky’s own guidance is blunt about it: skip a quarter and you’re looking at a penalty, interest, and a $500 revocation fee to get your KYU reinstated.
The quarterly filing windows open:
- April 1 for Q1 (January through March)
- July 1 for Q2 (April through June)
- October 1 for Q3 (July through September)
- January 1 for Q4 (October through December)
We’ve Seen It Happen
Carriers get a KYU number for one Kentucky load, forget about it, and discover a revoked license and a stack of penalties a year later. If Kentucky is out of your lanes for good, cancel the license. Don’t just stop filing.
Why This Matters for Your Insurance
Fair question: why is an insurance agency writing about a tax?
Because at Nova Coverage, KYU numbers, Form E filings, and quarterly tax traps are the exact conversations we have with Kentucky carriers and new authorities every week. Compliance problems and insurance problems travel together. A carrier who gets flagged at a weigh station for a missing KYU is the same carrier whose insurance filings get scrutinized next. Clean paperwork keeps your authority active, and your authority is your income.
If you run Kentucky lanes, our Kentucky trucking insurance page breaks down the state’s insurance requirements, filings, and freight corridors the same way this post breaks down the KYU. And if you’re brand new, here’s how to get same-day owner operator insurance while you’re setting all of this up. Kentucky is one of many states we write in — see the full list on our states we serve page.
Running Kentucky Lanes?
We insure Kentucky carriers from Louisville to Paducah, and we handle the Form E filings that keep your authority active. Let us shop 50+ carriers for your best rate.
The Bottom Line
A KYU number is a small, boring piece of paperwork that costs you nothing to get and about three cents a mile to maintain. Skipping it costs penalties, interest, a $500 reinstatement fee, and time sitting at a weigh station while your load clock runs.
Get the number. File the quarters. Run Kentucky without the drama.
Quick gut check for Kentucky carriers
KYU registered? Quarterly filings current, including zero-mile quarters? IFTA and IRP squared away? Form E on file with your insurance carrier? If you hesitated on any of those, spend ten minutes on it this week. It’s cheaper than the alternative.
