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St. Charles County car tax

A car worth $25,000 in St. Charles County, MO pays about $517 a year in personal property tax ($6.2081 per $100).

St. Charles County car tax calculator

Yearly car tax$517≈ $43/month
  1. Assessed value: $25,000 × 33.33% = $8,332.50
  2. Tax: $8,332.50 × 6.2081 per $100 = $517.29

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 St. Charles County by car value

$0$500$1K$1.5K$2K $0$20K$40K$60K$80K
Yearly tax by car value. The dot follows the calculator.
Car valueYearly taxPer month
$10,000$207$17
$15,000$310$26
$20,000$414$34
$25,000$517$43
$30,000$621$52
$40,000$828$69
$50,000$1,035$86
$75,000$1,552$129

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.

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 St. Charles 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 St. Charles County, MO?

$6.2081 per $100 for 2025.

How is car tax calculated in St. Charles County?

Assessed value: $25,000 × 33.33% = $8,332.50 → Tax: $8,332.50 × 6.2081 per $100 = $517.29

How much is car tax on a $30,000 car in St. Charles County?

About $621 a year.

When is car tax due in St. Charles 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.