North Carolina doesn't provide a formula for calculating postseparation support or alimony. Specific factors are determined in calculating spousal support in New York including income of both parties and the duration of marriage.Worksheets to calculate guideline amounts of maintenance and child support. Optional tools to help with calculations are below. To calculate alimony or spousal support you will need the following information: Your gross yearly income. Gross income is income before taxes. New York uses a formula as a guideline for setting alimony payments, but courts can exercise considerable discretion in ordering alimony. This calculator will help you get an idea of what you or your spouse may end up paying based on income and the length of the marriage. New York courts use standardized guidelines to arrive at a suggested amount of spousal maintenance. Judges can deviate from the amount when appropriate.