Is it mandatory for sick leave to be accrued? Can employees be credited with the total number of sick leaves at the beginning of the calendar year with prorated calculation? In case an employee resigns midway and has availed excess leave, then the excess should be adjusted with F&F. For example, an organization has 12 sick leaves in a year, and all 12 leaves are credited to the bucket at the beginning of the year. The pro-rated calculation is 1 leave every month. Now, if a person leaves in April but has availed 7 leaves, then the excess 3 should be adjusted with F&F.