Add Comment Question: Is severance calculated from the date of hire for en employee who started Part-time and went to full-time. Or is the part-time service pro-rated based on the number of hours. Answer: The length of service that goes into determining how much severance is owed includes all time worked as a part time employee. It is no prorated. Your Comment * Your Email * Your Name * Your City Note, your name, city and email is not displayed on the website. It is used to notify you that we have approved your comment.