There is a fully loaded cost for an employee. It includes the salary, the companies portion of taxes, benefits, etc... The employee may not know those numbers exactly, but the employer must because that is real cash leaving the door every month.
True, and on the flip side many employees don't factor this in when asking for salary raises and negotiations. A $20K bump is viewed as a fraction of your "fully loaded cost" as opposed to your base salary which you will be benchmarking against.
