A small thing that can save you a lot of trouble in the rental business is having a spare key for every vehicle. Keys get lost, damaged, locked inside the car, or sometimes renters simply don’t return them when they’re supposed to. Replacing a key on short notice can also get expensive depending on the vehicle. Having a spare already made means you’re not scrambling to find a solution while the car is sitting somewhere. Keep the spare somewhere secure and separate from the rental vehicle. It’s a small expense upfront that can save you time, money, and a lot of unnecessary headaches later.