Michigan and New York legally require rental car companies to rent to 19-year-old customers. Outside of these states, rental car companies set their own minimum age requirements.
Most car rental companies set a minimum age of 25 for renting vehicles without incurring additional fees according to their websites. Even in Michigan and New York, young drivers may face higher fees than their 21-to 24-year-old counterparts as stated in general information for car rental company, Budget.
Some rental companies don't charge additional fees for young drivers if they're traveling on orders for the military or on official government business. One last resort for 19-year-old renters is to check with their company travel departments. Some agreements between businesses and rental companies include a waiver of young drivers' fees.