Important Tax Deadlines

📌 September 2025

• Sep 10 – Individuals: Report August tip income using Form 4070.
• Sep 15 – Employers: Deposit nonpayroll withheld income taxes for August.
• Sep 15 – Calendar-year partnerships: File 2024 income tax return (Form 1065).
• Sep 15 – Calendar-year S corporations: File 2024 income tax return (Form 1120-S).
• Sep 30 – Calendar-year trusts and estates: File 2024 income tax return (Form 1041).

📌 October 2025

• Oct 10 – Individuals: Report September tip income (Form 4070).
• Oct 15 – Employers: Deposit Social Security, Medicare, and income taxes.
• Oct 15 – Calendar-year C corporations: File 2024 income tax return (Form 1120).
• Oct 31 – Employers: File Q3 2025 Form 941 and pay taxes if not deposited.

📌 November 2025

• Nov 10 – Individuals: Report October tip income.
• Nov 17 – Calendar-year exempt organizations: File 2024 Form 990, 990-EZ, or 990-PF.

📌 December 2025

• Dec 10 – Individuals: Report November tip income.
• Dec 15 – Corporations: Pay Q4 2025 estimated income taxes.