Retirement Calculator How much you have: How many years do you have until you retire?: Annual Income when you Retire: Passive Annual Income in Retirement:(Ex: Pension, Rents) Results: Income needed in Retirement: Additional Income needed in Retirement: Additional Principal Needed NOW: To Retirement Calculator, enter How much you have, How many years do you have you retire, Annual Income when you Retire and Passive Annual Income in Retirement get your result.