: Missouri and Illinois have reciprocity agreements. Usually, you should not be charged Illinois sales tax at the dealership .
You must title and register the car in Missouri within of purchase to avoid penalties . You will need the following at your local Missouri License Office : Faq - Motor Vehicle - Titling Registration live in missouri buy a car in illinois
: If the dealer incorrectly collects Illinois tax, you will receive credit for that amount toward your Missouri tax bill, but you will still have to pay any difference if Missouri's rate is higher . : Missouri and Illinois have reciprocity agreements