The IRS expects any business owners making more than $600 per year in rental income to make quarterly estimated tax payments These are due on the following dates:  Quarter 1- April 15 th   Quarter 2- July 15 th   Quarter 3 - September 15 th   Quarter 4 - January 15 th The business owners need to bear in mind that they can be charged with interest on top of the taxes owed by you already in case of underpaying the right amount. Likewise in case of overpaying you are giving the IRS an interest-free loan rather than investing in the business. Hence, it is required to make an accurate estimation of the payments to save money.