March 16 (March 15 is Sunday)
March 31
February 2
February 28 (Saturday → Due Monday, March 2, 2026)
January 15
January 31 (Saturday → Due Monday, February 2, 2026)
Individuals: Reporting November tip income, $20 or more, to employers (Form 4070).
Corporations: Paying the fourth installment of 2025 estimated income taxes.
Partnerships: Paying the fourth installment of 2025 estimated income taxes.
Tax Exempt Orgs: Deposit Estimated Tax for 4th quarter due on Unrelated Business Taxable Income for Tax-Exempt Organizations. Use Form 990-W to determine the amount of estimated tax payments required.
Employers: Establishing a retirement plan for 2025 (generally other than a SIMPLE, a Safe-Harbor 401(k) or a SEP)
Individuals: Reporting October tip income, $20 or more, to employers (Form 4070).
Employers: Reporting income tax withholding and FICA taxes for third quarter 2025 (Form 941), if you deposited on time and in full all of the associated taxes due.
Exempt Organizations: Filing a 2024 calendar-year information return (Form 990, Form 990-EZ or Form 990-PF) and paying any tax, interest and penalties due, if a six-month extension was previously filed.
Trusts and estates: Filing an income tax return for the 2024 calendar year (Form 1041) and paying any tax, interest and penalties due, if an automatic five-and-a-half month extension was filed.
Individuals: Reporting September tip income, $20 or more, to employers (Form 4070).
Individuals: Filing a 2024 income tax return (Form 1040 or Form 1040-SR) and paying any tax, interest and penalties due, if an automatic six-month extension was filed (or if an automatic four-month extension was filed by a taxpayer living outside the United States).
Individuals: Making contributions for 2024 to certain existing retirement plans or establishing and contributing to a SEP for 2024, if an automatic six-month extension was filed.
Individuals: Filing a 2024 gift tax return (Form 709) and paying any tax, interest and penalties due, if an automatic six-month extension was filed.
C corporations: Filing a 2024 income tax return (Form 1120) and paying any tax, interest and penalties due, if an automatic six-month extension was filed.
C corporations: Making contributions for 2024 to certain employer-sponsored retirement plans, if an automatic six-month extension was filed.
Employers: Reporting income tax withholding and FICA taxes for third quarter 2025 (Form 941) and paying any tax due.
Individuals: Reporting August tip income, $20 or more, to employers (Form 4070).
Individuals: Paying the third installment of 2025 estimated taxes, if not paying income tax through withholding (Form 1040-ES).
Corporations: Paying the third installment of 2025 estimated income taxes.
S Corporations: Making contributions for 2024 to certain employer-sponsored retirement plans, if an automatic six-month extension was filed.
Partnerships: Filing a 2024 income tax return (Form 1065 or Form 1065-B), if an automatic six-month extension was filed.
Tax Exempt Orgs: Deposit Estimated Tax for 3rd quarter due on Unrelated Business Taxable Income for Tax-Exempt Organizations. Use Form 990-W to determine the amount of estimated tax payments required.
Individuals: Reporting July tip income, $20 or more, to employers (Form 4070).
Employers: Reporting income tax withholding and FICA taxes for second quarter 2025 (Form 941), if you deposited on time and in full all of the associated taxes due.
Individuals: Reporting June tip income, $20 or more, to employers (Form 4070).
Employers: Reporting income tax withholding and FICA taxes for second quarter 2025 (Form 941), and paying any tax due.
Employers: Filing a 2024 calendar-year retirement plan report (Form 5500 or Form 5500-EZ) or requesting an extension.
Individuals: Reporting May tip income, $20 or more, to employers (Form 4070).
Individuals who live outside the United States: Filing a 2024 individual income tax return (Form 1040 or Form 1040-SR) or filing for a four-month extension (Form 4868), and paying any tax and interest due, if you live outside the United States.
Individuals: Paying the second installment of 2025 estimated taxes, if not paying income tax through withholding (Form 1040-ES).
Corporations: Paying the second installment of 2025 estimated income taxes.
Partnerships: File Form 8813 quarterly payment voucher and pay any tax due.
Tax Exempt Orgs: Deposit Estimated Tax for 2nd quarter due on Unrelated Business Taxable Income for Tax-Exempt Organizations. Use Form 990-W to determine the amount of estimated tax payments required.
