The required length of a Chapter 13 plan depends on the debtor’s income.  If the debtor’s annual income is less than the median family income for the debtor’s state and family size, the length of the plan must be 3 years, unless the debtor can justify a longer period, which may not exceed 5 years.  If the debtor’s annual income exceeds the median family income, the length of the plan must be 5 years unless all unsecured claims can be paid off in a shorter period.  The debtor’s annual income is his or her current monthly income multiplied by 12.