For Government Income Tax reasons, estimated tax payments are due as listed below:
·April 15 (first quarter)
·June 15 (second quarter)
·September 15 (third quarter)
·January 15 (4th quarter)
Note that the January 15 quarterly payment is really due, not within the tax year itself, but early the year after (before your taxes returns). Note that when the date falls on the weekend or holiday it might be extended to another working day.
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