The fee in the Star Command II System Vault is the same as with the rest of the PlayMesh fleet. It is, in fact, on the smaller side of all of the fees for banks in most MMO text based iPhone RPGs. This being said, it is still pretty expensive and lowers its over all uselessness. There are few situations early on that will really make you want to use the Star Command II System Vault. The main reason to use the System Vault is that Star Command II Repair Dock will only be able to use money from your System Vault account. You cannot just use your free cash in the Star Command II Repair Dock, so you have to keep a little money in the System Vault just in case.