The American tax system operates on a "pay as you go" basis, meaning, the IRS wants taxes paid as you earn your income, not after. For employees, this means payroll withholding. For retirees, this means opting for withholding on Social Security and retirement distributions. For the self-employed or operator outside of normal withholding system, this can mean making estimated tax payments throughout the year. On today's show, Ralph discusses how to calculate and when to pay your estimated taxes.