Knox County car tax

A car worth $25,000 in Knox County, MO pays about $564 a year in personal property tax ($6.7715 per $100).

Knox County car tax calculator

Car's value$

Yearly car tax$564≈ $47/month

Assessed value: $25,000 × 33.33% = $8,332.50
Tax: $8,332.50 × 6.7715 per $100 = $564.24

Towns value cars from pricing guides (average retail or trade-in), not what you paid. Your bill may be prorated for months you owned the car.

Car tax in Knox County by car value

Yearly tax by car value. The dot follows the calculator.

Car value	Yearly tax	Per month
$10,000	$226	$19
$15,000	$339	$28
$20,000	$451	$38
$25,000	$564	$47
$30,000	$677	$56
$40,000	$903	$75
$50,000	$1,128	$94
$75,000	$1,693	$141

Buying a car in Missouri: one-time tax

Missouri state sales/use tax on motor vehicles — 4.225%, plus local sales tax where you live. Your trade-in is subtracted before tax.

Price$Trade-in$

State tax$1,4794.225%

Local sales tax for your home address is added. Paid to the DOR when you title the car.

Cut what your car costs in Knox County

Car tax is set by your town, but your loan and insurance aren't. Refinancing a car loan at a lower rate often saves more each year than the tax itself.

Check refinance rates →

Other counties in Missouri

Yearly tax on a $25,000 car.

Questions

What is the car tax rate in Knox County, MO?

$6.7715 per $100 for 2025.

How is car tax calculated in Knox County?

Assessed value: $25,000 × 33.33% = $8,332.50 → Tax: $8,332.50 × 6.7715 per $100 = $564.24

How much is car tax on a $30,000 car in Knox County?

About $677 a year.

When is car tax due in Knox County?

Due every year by December 31 (penalties after). You need a paid prior-year receipt or a statement of non-assessment to renew registration.

How is Missouri car property tax calculated?

Trade-in value × 33⅓% × the local levy per $100 ÷ 100.

Do I need a receipt to renew plates?

Yes. You need the paid prior-year personal property tax receipt, or a waiver.

Sources

Last checked October 14, 2026. Rates are for passenger cars owned by individuals; leased, business and specialty vehicles can differ. Confirm with your tax collector or commissioner of the revenue.