The costs of the recruitment and selection process differ depending on how the process is administered. If administered internally, it must be calculated as follows: (costs of promoting open positions + cost of tools used in the evaluation of the candidates + costs of salaries of employees involved in the process) / number of closed positions in that time.
If the process is outsourced to a professional recruitment agency, then the cost structure varies depending on several factors. These involve the gross monthly salary of the open position, costs for identifying candidates, success bonuses for the shortlist, success bonuses for closing the position etc.