A vehicle with a rear seat storage arrangement includes a floor, a seat including a seat bottom rotatably coupled to a seat back, and an underseat storage system removably coupled to the floor below the seat bottom. The underseat storage system includes a storage bin and a lockable lid defining a storage compartment. The lockable lid includes a latch configured to selectively lock to prevent access to the storage compartment and facilitate preventing access for removably uncoupling the underseat storage system from the floor.