South Dakota Car Sales Tax Calculator (2026)

• South Dakota charges a 4% motor vehicle excise tax on the purchase price in place of state sales tax.

Motor vehicle excise tax

4%

Local tax

None on vehicles

Trade-in

Full credit: reduces the taxable price

Manufacturer rebate

Taxed: tax is figured before the rebate

Figured with South Dakota's rules for a buyer from a dealer.

• Used car, no trade-in$720

  $18,000 price. Taxed on $18,000.

• New car with a trade-in$1,000

  $35,000 price, $10,000 trade-in. Taxed on $25,000. The trade-in saves $400.

• New car with a trade-in and a rebate$1,200

  $45,000 price, $15,000 trade-in, $2,000 rebate. Taxed on $30,000. The trade-in saves $600. The rebate does not lower the tax.

These examples treat the agreed price as the taxable price. Where a state uses a book value instead, the tax can differ.

South Dakota has no local tax on vehicles, so buyers in Sioux Falls and Rapid City and everywhere else in South Dakota are figured at the same state rate: $1,200 on a new $30,000 car. Whether the tax applies to your purchase still depends on the rules above.

The calculator covers a car bought from a dealer. These rules apply to other ways of buying or bringing a car to South Dakota.

Buying from a private seller

A used car bought from a private seller is taxed at 4% of the total amount paid, less any trade-in, and the buyer and seller must give the county treasurer a bill of sale. Without a bill of sale, the tax is based on the retail value in a dealers' guide approved by the Secretary of Revenue. (sdlegislature.gov, checked Nov 10, 2026)

A car received as a gift

A car transferred without payment between spouses, between a parent and child, or between siblings (by blood, marriage or adoption) is exempt from the motor vehicle excise tax. Other gifts are taxed at 4% of the retail value in a dealers' guide for a used car, or the manufacturer's suggested list price for a new one. (sdlegislature.gov, checked Nov 10, 2026)

Moving to South Dakota with your car

No excise tax is owed on a car the applicant already paid sales, use, excise or similar tax on in another state, if that tax was the same or more than South Dakota's; if it was less, the difference is due. Without proof of tax paid, the 4% tax is charged on the car's retail value on the day it entered the state. (sdlegislature.gov, checked Nov 10, 2026)

Buying outside South Dakota

Sales, use, excise or similar tax paid on the car to another state is credited, and no South Dakota tax is due if that tax was the same or more than the 4% excise. The county treasurer requires a dealer affidavit, bill of sale, receipt or other proof that the tax was paid. (sdlegislature.gov, checked Nov 10, 2026)

Active-duty military

A nonresident stationed in South Dakota on U.S. military service, and that person's dependents, count as nonresidents. South Dakota registration, license fee and plate rules do not apply to a nonresident's car that is registered and plated under the home state's law. (sdlegislature.gov, checked Nov 10, 2026)

Deadline to pay

The excise tax must be paid and the car titled and registered with the county treasurer within 45 days of purchase. Fees are figured from the purchase date, regardless of when the application is made. (dor.sd.gov, checked Nov 10, 2026)

Paying late

After 45 days, interest is charged on the tax at 1.25% or $5, whichever is greater, for the first month and 1.25% per month after that; after 60 days, a one-time penalty of 10% of the tax or $10, whichever is greater, is added. A late title application also costs $1 per week past the 45-day period, up to $50. (dor.sd.gov, checked Nov 10, 2026)

South Dakota is tied for 9th lowest of all 50 states and the District of Columbia for tax on a $30,000 car. See all states.

Tax on a $30,000 car before trade-in, in nearby states. You generally pay tax based on where you register the car.

• Montana$0
• South Dakota$1,200
• Wyoming$1,200 – $2,700
• Iowa$1,500
• North Dakota$1,500
• Nebraska$1,650 – $2,250
• Minnesota$2,063

• All car calculators
• Sales tax calculators by state
• Car sales tax by state
• Trade-in tax credit by state
• Car cost by state
• South Dakota out-the-door price
• Auto loan calculator

• Iowa car sales tax
• Minnesota car sales tax
• Montana car sales tax
• Nebraska car sales tax
• North Dakota car sales tax
• Wyoming car sales tax