That said, most rental companies will place a young renter surcharge fee on all renters under the age of 25. Depending on the company, these surcharge fees can cost as much as $50 extra per day. This may be why the “25 to rent” myth has persisted so long—no one wants to pay those extra fees!
Assuming you and your friends are at least over 21, you shouldn’t have any issues renting a car for your Missouri trip—it’ll just cost you more than someone who’s over 25.