Dear Kavita,
Annual Leave as regulated by Factory Act states the below mentioned.
Calculation for adult: one day for every twenty days of work performed by him during the previous calendar year.
Carry Forward: 30 days in case of adult.
Leave Encashment:
1.Fraction of leave of half a day or more should be considered as full and less than half day should not be considered.
2.Whole of the leave balance to be paid during normal separation/termination.
PS: Factory act does not define whether to be paid on Basic or Gross salary. Also, please refer Factory Act for better clarification.
Regards,
Niraj Sharma