Bonus as part of CTC is not incorrect. The company is not deducting it from your salary also. Salary means the gross salary and bonus will be shown outside the gross salary along with other contributions payable by the employer,ie, EPF, ESI (if any) or medical insurance premium. In the monthly payslip also, there will not be any mention about bonus as deduction from salary. It is purely an amount paid over and above salary paid monthly. As such it is a cost to company and that is why it is being reflected in the CTC slip.