A Budget Rent A Car account is a great way to rent a car for your trip, with no additional fees and free upgrades on certain days. With this account, you can enjoy the Best Rate Guarantee, which ensures that you'll get the lowest rate available at the time of booking. You can also earn one day of free rental per 3-day minimum rental period, as long as you're renting a car from a Budget location in contiguous US (excluding New York Metro area).