Hỏi When are quarterly estimated tax payments due? Đáp For estimated tax purposes, the year is divided into four payment periods. Each period has a specific payment due date. If you don't pay enough tax by the due date of each payment period, you may be charged a penalty even if you're due a refund when you file your income tax return at the end of the year. If you mail your estimated tax payment and the date of the U.S. postmark is on or before the due date, the IRS will generally consider the payment to be on time. If you use IRS Direct Pay, you can make payments up to 8 p.m. Eastern time on the due date. If you use a credit or a debit card, you can make payments up to midnight on the due date. When to Pay Estimated Tax Payment Period Due Date January 1 – March 31 April 15 April 1 – May 31 June 15 June 1 – August 31 September 15 September 1 – December 31 January 15* of the following year. *See January payment in Chapter 2 of Publication 505, Tax Withholding and Estimated Tax Fiscal Year Taxpayers If your tax year doesn't begin on January 1, see the special rules for fiscal year taxpayers in Chapter 2 of Publication 505 Farmers and Fishermen See Chapter 2 of Publication 505 Note: If the due date for making an estimated tax payment falls on a Saturday, Sunday, or legal holiday, the payment will be on time if you make it on the next day that's not a Saturday, Sunday, or legal holiday. Thêm thông tin Form 1040-ES, Estimated Tax for Individuals (PDF) Mục Estimated Tax Phụ Mục Individuals