"Forfeiture of Salaries and Wages" is a punishment awarded to an employee. However, this punishment is awarded only after conducting a domestic inquiry. Month after month, you cannot go on forfeiting the salary of the employees.
Secondly, any deductions made from the employee's salary have to be deposited to the Labour Welfare Fund (Karnataka State Labour Welfare Fund for the state of Karnataka). Are you doing that?
If a Labour Officer checks the salary rolls of the employees, how will you justify the deductions without an inquiry? How will you justify not depositing the deducted amount to LWF?
For this, I recommend revising the salary structure of the employees. Keep one component as fixed pay. The employee will get this even if he/she does not attain any target. Let the other component be an incentive. This incentive amount should be linked to the targets. Though I recommend this, I doubt whether it holds the scrutiny of the law. I recommend checking the provisions of the Payment of Wages Act. In addition to this, you may check provisions of the Factory Act or Shops and Establishment Act as applicable to your company.
Regards,
Dinesh V Divekar