If you are required to make estimated tax payments by the Internal Revenue Service the first payment is usually due on the 15^th of April. On this date you have the option to either pay the entire year’s estimated tax or you can pay your estimated taxes over four quarterly payments. The four payments are typically on due April 15^th, June 15^th, September 15^th, and January 15^th of the next year. However, if the due date falls on a Saturday, Sunday, or recognized holiday, the payment will be due the next non-holiday weekday.