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There are four payment periods for making estimated tax installments. Each period has a specific due date.
Most of the taxpayers you assist will pay their estimated tax in four equal installments. Taxpayers who do not pay enough tax by the due date of each payment period may be charged a penalty, even if the filed tax return shows a refund.
| January 1 - March 31 |
April 15 |
4 |
| April 1 - May 31 |
June 15 |
3 |
| June 1 - August 31 |
September 15 |
2 |
| September 1 - December 31 |
January 15 |
1 |
| If the payment date falls on a Saturday, Sunday, or holiday, then the payment is due on the next business day. |
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