Whenever you sign a contract, you must carefully read every single word to make sure you know exactly what you are committing to. Well, that is the same when you sign a contract with a self storage company. In it you should find out everything related to the payments such as the exact amount you need to pay for your rent and what is the due date you must make your payment on. Also, in it you should find what exactly can be considered paying late and what the late fee is as well as any other additional fees that might be applied in case you lose your key, for example.