As of 8/28/02, there is not a usury limit per the Motor Vehicle Time Sales Act, Ch. 365, RSMo.
Previously, there was, but it actually applied if the sale (not the loan) was $7,500 or less, not if it was over $7,500. The rate limit is stated in add-on terms, and their translation to a simple interest rate varies depending on the term. If the model year of the vehicle purchased is two years old or less, the limit is 10%, and if the vehicle is older than that, the limit is 13% (again, those are add-on rates).