October 10 – Employees must report September tip income of $20 or more to employers (Form 4070).

October 15 – Individuals whose personal federal income tax returns for 2023 received an automatic extension must file them no later than today and pay any tax, interest and penalties due. In addition:

• Those with offshore bank accounts must file the Financial Crimes Enforcement Network (FinCEN) Report 114 “Report of Foreign Bank and Financial Accounts” (also known as the “FBAR”), if not filed already. (This report received an automatic extension to today if not filed by the original due date of April 15th.)
• Calendar-year C corporations that obtained an extension should file their 2023 Form 1120 by this date.
• If the monthly deposit rule applies, employers must deposit the tax for payments in September for Social Security, Medicare, withheld income tax and nonpayroll withholding.

October 31 – Employers must file Form 941 for the third quarter of 2024 (November 10 if all taxes are deposited in full and on time). Also, employers must deposit FUTA taxes owed through September if the liability is more than $500.

November 12 – Employees must report October tip income of $20 or more to employers (Form 4070).

November 15 – Calendar-year tax-exempt organizations that obtained an exemption should file their 2023 returns. In addition:

• If the monthly deposit rule applies, employers must deposit the tax for payments in October for Social Security, Medicare, withheld income tax and nonpayroll withholding.

December 10 – Employees must report November tip income of $20 or more to employers (Form 4070).

December 16 – Calendar-year corporations must pay fourth quarter 2024 estimated tax payments. In addition:

• If the monthly deposit rule applies, employers must deposit the tax for payments in November for Social Security, Medicare, withheld income tax and nonpayroll withholding.