Previous Article

How to Add Value to Auto Sales

Next Article

How to Compare Auto Sales

How to Calculate Auto Sales Tax

The amount of sales tax you pay on your automobile depends directly on the amount your vehicle is sold for. It also depends on where you live and if the car is used or new. Additionally, the tax may differ depending on whether you are purchasing the vehicle from a private seller or from a dealership. It is vital to know how to calculate taxes yourself.


  1. List all of the expenses that you are responsible for, in relation to purchasing the car that interests you. This generally includes any fees related to the purchase, as well as the actual cost of the car. Some examples of fees related to the purchase of the car include insurance fees and title transfer fees. Subtract any amount of down payment you pay, as this will not affect the taxes.

  2. Ask the dealer, or seller, any questions you have on the purchase of the vehicle, before signing any paperwork. This is also the time to confirm all of the expenses you are responsible for that are nontaxable. These include any fees for warranties or other fees for documents.

  3. Document all of the items that are taxable, in addition to the actual price of the vehicle. These costs include any fees associated with the transfer of the title, as well as license plate changes and insurance.

  4. Determine the tax percentage for your state and apply it to the total cost of taxable expenses. Be aware that some states offer tax-free shopping, which includes the purchase of vehicles; so check your local regulations.

  5. Determine whether the tax rate is applied prior to the trade in or the value after you have applied the trade in.