April 18

Individuals: Filing a 2021 income tax return (Form 1040 or Form 1040-SR) or filing for an automatic six-month extension (Form 4868), and paying any tax due. (See June 15 for an exception for certain taxpayers.)

Individuals: Paying the first installment of 2022 estimated taxes, if not paying income tax through withholding (Form 1040-ES).

Individuals: Making 2021 contributions to a traditional IRA or Roth IRA (even if a 2021 income tax return extension is filed).

Individuals: Making 2021 contributions to a SEP or certain other retirement plans (unless a 2021 income tax return extension is filed).

Individuals: Filing a 2021 gift tax return (Form 709) or filing for an automatic six-month extension (Form 8892), and paying any gift tax due. Filing for an automatic six-month extension (Form 4868) to extend both Form 1040 and, if no gift tax is due, Form 709.

Household employers: Filing Schedule H, if wages paid equal $2,300 or more in 2021 and Form 1040 isn’t required to be filed. For those filing Form 1040, Schedule H is to be submitted with the return and is thus extended to the due date of the return.

Trusts and estates: Filing an income tax return for the 2021 calendar year (Form 1041) or filing for an automatic five-and-a-half month extension to October 1 (Form 7004), and paying any income tax due.

Calendar-year corporations: Filing a 2021 income tax return (Form 1120) or filing for an automatic six-month extension (Form 7004), and paying any tax due.

Calendar-year corporations: Paying the first installment of 2021 estimated income taxes.