AutoTaxCalculatorKansas auto sales tax: 6.5% plus local
Kansas auto sales tax is 6.5% state tax plus the local rate where the car is registered, on the price minus your trade-in. With typical local rates, most buyers pay roughly 8% to 10% in total.
The 6.5% state part is the same everywhere in Kansas. Local sales taxes are added by cities and counties, so buyers in Johnson, Sedgwick, Shawnee or Wyandotte County, and in different cities inside them, pay different totals. Because the rate depends on the exact address, use the Department of Revenue's rate locator for the address where you'll register the car.
How to calculate sales tax on a car in Kansas
- Taxable price: purchase price minus the dealer's trade-in allowance (or the price of a car you sold within 120 days).
- State tax: taxable price × 6.5%.
- Local tax: taxable price × your city + county rate.
Example: $30,000 car, $10,000 trade-in, 2.5% local rate
- Taxable price: $30,000 − $10,000 = $20,000
- State: $20,000 × 6.5% = $1,300.00
- Local: $20,000 × 2.5% = $500.00
- Total: $1,800.00, $900 less than with no trade-in
Sales tax for cars in Kansas, by price
The total rate is 6.5% plus your city and county rate, applied to the whole taxable price. Here's the sales tax on vehicles in Kansas after trade-in at three common combined local rates.
| Taxable price | 6.5% + 2% | 6.5% + 3% | 6.5% + 4% |
|---|---|---|---|
| $10,000 | $850 | $950 | $1,050 |
| $20,000 | $1,700 | $1,900 | $2,100 |
| $30,000 | $2,550 | $2,850 | $3,150 |
| $40,000 | $3,400 | $3,800 | $4,200 |
A trade-in or a car you sold within 120 days comes off before the rate is applied. On a $30,000 purchase at 9.5% total, a $10,000 trade-in saves $950.
The 120-day sold-vehicle credit
Kansas used to give a tax break only for a trade-in at the dealership. For purchases on or after January 1, 2025, it also treats a car you sell yourself like a trade-in, as long as you sell one vehicle and buy another within 120 days. You can ask the county treasurer to apply it when you register the new car. If the treasurer can't process it, file Form ST-21VT with the Kansas Department of Revenue for a refund.
Two limits apply. You can't combine the sales of several vehicles to reduce the price of one purchase. And a replacement bought after a car was stolen or destroyed by an accident, fire or similar loss doesn't qualify.
Where you pay: dealer or county treasurer
When you buy from a Kansas dealer, the dealer usually collects the sales tax. When you buy from a private seller or out of state, the county treasurer's tag office collects it when you title and register the vehicle. Either way, you have 60 days from the purchase date to apply for title and registration at the treasurer's office in the county where the vehicle is garaged. After that, penalties apply. Within that window you can buy a temporary tag from any county treasurer or from the selling dealer.
Kansas vehicle property tax
Besides the one-time sales tax, Kansas charges a yearly vehicle property tax that you pay with your registration at the county treasurer. It's based on the vehicle's class, its age and the local mill levy where you live, so it's higher on newer, more expensive vehicles and drops as they age. Your registration renewal notice combines the property tax and the registration fee into one amount. The county treasurer's website usually offers an estimator for your county. Property tax on vehicles in Kansas is the reason a newer car's renewal costs more than an older one's.
Kansas registration fees
Kansas registration fees are set by vehicle type and weight, with a separate amount for trucks and motorcycles, plus the title fee when ownership changes. Your county treasurer collects them along with the property tax, and the renewal notice shows the full amount. That combined figure is what a Kansas car tag estimator or a Kansas vehicle registration fee calculator on your county's site will show, since the two are billed together.
Frequently asked questions
What is Kansas sales tax on cars?
6.5% state tax plus the local rate where the car is registered, on the price after the trade-in.
Do I pay Kansas sales tax if I buy a car in Missouri?
If you live in Kansas and register the car here, the county treasurer collects Kansas tax when you title it. If you paid Missouri tax, bring proof; it's credited against what Kansas charges.
Does Kansas charge sales tax on private car sales?
Yes. The county treasurer collects state and local sales tax when you register a car bought from an individual.
How long do I have to register a car in Kansas?
60 days from the date of purchase, at the county treasurer's office where the vehicle is garaged.
Why is my Kansas tag renewal so expensive?
Because it includes the yearly vehicle property tax, which depends on your vehicle's value and the local mill levy, as well as the registration fee.
Sources
- Kansas Department of Revenue: Vehicle tags, titles and registration (60-day rule)
- Kansas DOR: Form ST-21VT FAQ (120-day sold-vehicle credit)
- Kansas DOR opinion: definition of trade-in allowance
This calculator gives an estimate. Your dealer or county treasurer calculates the final amount. How we calculate