Some car rental companies have special membership plans with unlimited mileage, while others only offer it for extended rentals. At Budget, unlimited mileage is available for people that sign up for the Budget Business Program. Hertz offers unlimited mileage for customers who rent a car for a month or longer.
The Budget Business Program allows people that travel often for business to rent cars and get additional benefits, including a removal of mileage restrictions, some money back on qualifying rental days, and a lower minimum renting age of 21.
As of 2015, Hertz's monthly rental agreement has no maximums or long-term obligations, making it an option for those considering signing a traditional lease.