When you buy a car in Minnesota you pay a 6.5% motor-vehicle sales tax — notably lower than the state’s general sales tax. The amount is calculated on the purchase price after subtracting any trade-in. This calculator applies that rate, the trade-in credit, and the dealer doc fee so you can see your true out-the-door tax.
How it works
Minnesota’s vehicle tax calculation is straightforward:
- Net the price against your trade-in. Subtract the trade-in allowance from the purchase price to get the taxable amount.
- Apply the 6.5% rate. Multiply the net taxable price by 6.5% to get the motor-vehicle sales tax.
- Add the doc fee. Dealers add a documentation fee on top; this calculator includes it in the out-the-door total.
The formula is tax = max(0, price − trade-in) × 6.5%, and the out-the-door figure is price + tax + doc_fee.
Tips and example
For a $30,000 car with a $10,000 trade-in, the taxable amount is $20,000, so the motor-vehicle tax is $20,000 × 6.5% = $1,300. Adding a typical $125 dealer doc fee, plus the original price, the out-the-door cost (before title and registration) is about $31,425.
Trading in rather than selling privately can save you real tax money in Minnesota because the trade reduces the taxable base. Note that title, plate, registration, and wheelage fees are separate and not included here.