Kentucky car tax comes in two pieces: an annual property tax of $0.45 per $100 of assessed value plus a local county rate, and a one-time 6% usage tax collected when a vehicle is sold or first registered in the state. The property tax is due by the last day of your birth month each year, and a vehicle the state values at $15,000 typically generates an annual bill somewhere between about $90 and $135 depending on where you live.
How Your Vehicle Gets Valued
Kentucky assesses every registered vehicle as of January 1. The Department of Revenue is required by statute to use the average trade-in value from the National Automobile Dealers Association guides for your make, model, and year.1Kentucky Legislative Research Commission. Kentucky Revised Statutes KRS 132.485 It isn’t the retail price a dealer would charge, and it isn’t a rough private-sale number. It’s the trade-in figure, and once set it stays locked for the whole calendar year. A market swing in June doesn’t change the bill you’ll pay in your birth month.2Kentucky Department of Revenue. Motor Vehicle Property Tax
The Annual Property Tax Rate
The state rate for non-historic motor vehicles is $0.45 per $100 of assessed value.3Kentucky Department of Revenue. Motor Vehicle Tax Rate Book 2026 Your county adds a local rate on top for county government, schools, and special taxing districts. Local rates vary widely, from roughly $0.14 per $100 in some counties to over $0.44 per $100 in others.
Here’s how the math works for a $20,000 vehicle in Jefferson County, where the 2026 local rate is $0.166 per $100:
- State tax: ($20,000 ÷ 100) × $0.45 = $90.00
- Local tax: ($20,000 ÷ 100) × $0.166 = $33.20
- Total: $123.20
The same vehicle in Casey County, where the local rate is $0.4406 per $100, would come to $178.12. The Department of Revenue publishes a county-by-county rate book each year if you want to confirm your exact figure.3Kentucky Department of Revenue. Motor Vehicle Tax Rate Book 2026
The 6% Usage Tax at Purchase
Separate from the yearly property tax, Kentucky charges a one-time 6% motor vehicle usage tax whenever a vehicle is transferred to a new owner or registered in the state for the first time.4Justia Law. Kentucky Revised Statutes 138.460 – Motor Vehicle Usage Tax The county clerk collects it at registration.
For new vehicles, the tax applies to the purchase price shown on a notarized affidavit. Without that affidavit, the clerk falls back on 90% of the manufacturer’s suggested retail price. Since July 2014, Kentucky has allowed a trade-in credit on new vehicle purchases, so the 6% applies only to the difference between the new price and the trade-in value.5Kentucky Department of Revenue. Motor Vehicle Usage Tax
For used vehicles, the tax is calculated on either the attested selling price in a notarized affidavit or the NADA retail value, whichever applies.5Kentucky Department of Revenue. Motor Vehicle Usage Tax
Moving into Kentucky with a car already registered elsewhere? If the other state charged a similar tax, Kentucky gives you credit for what you paid, but only if that state extends the same courtesy to Kentuckians moving the other way.4Justia Law. Kentucky Revised Statutes 138.460 – Motor Vehicle Usage Tax
When Payment Is Due
Your annual tax notice arrives the month before your registration renewal month, which for most owners is their birth month.2Kentucky Department of Revenue. Motor Vehicle Property Tax Payment is due by the last day of that month. Miss it and the account becomes delinquent.
Because the property tax and the registration renewal land together, most owners pay them as a single transaction even though they are legally distinct obligations.
How to Pay
The simplest option is in person at your local County Clerk’s office. You pay, and the clerk hands you your updated registration decal on the spot. That’s the only same-day route.
Kentucky also runs an online renewal portal that accepts credit cards and electronic checks.6Commonwealth of Kentucky. Kentucky Vehicle Registration Renewal A non-refundable service fee (a percentage of the transaction) and a $2.00 mailing fee per vehicle apply. Allow 5 to 7 working days for the clerk to process and mail your decal.7DRIVE. Vehicle Registration and Renewals Mail-in payment is accepted but needs extra lead time for postal transit and manual handling. If the end of your birth month is close, mailing it is a gamble.
If You Think the Value Is Too High
The NADA average doesn’t always match reality. High mileage, mechanical trouble, or body damage can all pull a specific vehicle below the standardized value.
The form for correcting this is the Affidavit for Correction/Exoneration of Motor Vehicle Property Tax (Form 62A044), which asks for your mileage as of January 1 and a description of any damage that existed before that date.8Jefferson County Clerk. Affidavit for Correction/Exoneration of Motor Vehicle/Boat/Trailer Property Tax Your county Property Valuation Administrator reviews it. If the claim holds up, the assessed value drops and your bill is recalculated.
For a formal dispute, KRS 131.110 gives you 60 days from the date of the assessment notice to file a written protest with the Department of Revenue.9Justia Law. Kentucky Revised Statutes 131.110 – Protest of Assessment The protest has to include a supporting statement explaining why the value is wrong. The department issues a ruling, and if you still disagree you can appeal to the Kentucky Board of Tax Appeals.10Kentucky Department of Revenue. Protest Procedures
Late Penalties and Interest
Penalties escalate fast. Pay within five days of the delinquency date and the penalty is waived. After that grace window but within 30 days, a 3% penalty applies to the taxes due. Beyond 30 days, the penalty jumps to 10%.11FindLaw. Kentucky Revised Statutes 134.810 – Date on Which Taxes Become Due or Delinquent
On top of the penalty, interest runs at 15% per year on the unpaid balance from the delinquency date.11FindLaw. Kentucky Revised Statutes 134.810 – Date on Which Taxes Become Due or Delinquent That interest is statutory. The Department of Revenue has no authority to waive it.
Beyond the money, Kentucky places a hold on your vehicle’s registration until the balance clears. You can’t get a valid year decal, transfer the title, or sell the vehicle with a clean record while the hold is in place. Driving on expired tags also exposes you to traffic citations.
If You’re Active-Duty Military
Active-duty servicemembers stationed in Kentucky on military orders do not owe the state’s motor vehicle property tax, as long as their Leave and Earnings Statement does not list Kentucky as their state of residence or taxable state.2Kentucky Department of Revenue. Motor Vehicle Property Tax The protection comes from the federal Servicemembers Civil Relief Act, which blocks states from taxing the personal property of servicemembers present only because of orders.12Office of the Law Revision Counsel. 50 USC 4001 – Residence for Tax Purposes The same federal rule covers military spouses.
Two limits are worth knowing. The exemption doesn’t apply to vehicles used in a trade or business inside Kentucky, and it doesn’t cover servicemembers who are actually domiciled in Kentucky. If Kentucky is your home state and you happen to be stationed here, you still owe the tax.
Deducting the Tax on Your Federal Return
Kentucky’s motor vehicle property tax qualifies as a deductible state and local tax on your federal return if you itemize. The IRS treats it as a personal property tax because it’s based on the vehicle’s value rather than a flat fee, which makes it eligible for the SALT deduction. For 2026, that deduction is capped at $40,400 for most filers, or $20,200 for married taxpayers filing separately. Your vehicle tax counts toward the cap alongside any state income tax and real estate taxes you deduct.