My Calendar

Key Dates in December 2025

10 Employees who work for tips Employees who work for tips December 10, 2025 Employees who work for tips – If you received $20 or more in tips during the previous month, report them to your employer. You can use Form 4070 Employee’s Report of Tips to Employer. Read more

15 12:00 am: Corporations 12:00 am: Corporations 12:00 am December 15, 2025 Corporations – Deposit the fourth installment of your estimated income tax. A worksheet, Form 1120-W, is available to help you estimate your tax for the year. Read more, 12:00 am: Employers 12:00 am: Employers 12:00 am December 15, 2025 Employers – Social Security, Medicare, and withheld income tax – If the monthly deposit rule applies, deposit the tax for payments in November. Read more, 12:00 am: Employers 12:00 am: Employers 12:00 am December 15, 2025 Employers – Nonpayroll Withholding. If the monthly deposit rule applies, deposit the tax for payments in November. Read more