To determine the amount of money you will need to save each year in order to reach your retirement goals, simply fill in the boxes with the appropriate information and let the Retirement Calculator do the work for you. The Retirement Calculator will compute the annual savings required in order to reach a specified future dollar amount. For monetary amounts, enter the value with no commas or dollar signs. (Example: $20,000 as 20000.) Enter the interest rate in decimal form. (Example: 8.25% as 8.25).