- Written by Land Tech
You must pay the state sales tax on any vehicle purchased outside Mississippi and on any casual sale of an automobile. The state sales tax rate is 5% and is based on the dealer's selling price before subtracting any dealer's discounts and trade-ins. Tax on a casual sale is based on the assessed value of the vehicle as determined by the most recent assessment schedule. If you purchase a vehicle out-of-state and it is first tagged in Mississippi, you will not be given any tax credit for any sales tax paid to the other state.