December 2025 Individual Due Dates
December 1 – Time for Year-End Tax Planning
December is the month to take final actions that can affect your tax result for 2025. Taxpayers with substantial increases or decreases in income, changes in marital status or dependent status, and those who sold property during 2025 should call for a tax planning consultation appointment.
December 10 – Report Tips to Employer
If you are an employee who works for tips and received more than $20 in tips during November, you are required to report them to your employer on IRS Form 4070 no later than December 10. Your employer is required to withhold FICA taxes and income tax withholding for these tips from your regular wages. If your regular wages are insufficient to cover the FICA and tax withholding, the employer will report the amount of the uncollected withholding in box 8 of your W-2 for the year. You will be required to pay the uncollected withholding when your return for the year is filed.
December 31 – Last Day to Make Mandatory IRA Withdrawals
Last day to withdraw funds from a Traditional IRA Account and avoid a penalty if you were born before January 1, 1952. If your birth date is during the period January 1, 1952, through December 31, 1952 (i.e., you reached age 73 in 2025), your first required distribution is for tax year 2025, but you can delay the distribution to April 1, 2026. If you are required to take a distribution in 2025, and the institution holding your IRA will not be open on December 31, you will need to arrange for withdrawal before that date.
December 31 – Last Day to Pay Deductible Expenses for 2025
Last day to pay deductible expenses for the 2025 return (doesn’t apply to IRA, SEP or Keogh contributions, all of which can be made after December 31, 2025).
December 31 – Caution! Last Day of the Year
If the actions you wish to take cannot be completed on the 31st or in a single day, you should consider taking action earlier than December 31st, as some financial institutions may be closed that day.
Weekends & Holidays:
If a due date falls on a Saturday, Sunday or legal holiday, the due date is automatically extended until the next business day that is not itself a legal holiday.
Disaster Area Extensions:
Please note that when a geographical area is designated as a disaster area, due dates will be extended. For more information whether an area has been designated a disaster area and the filing extension dates visit the following websites:
FEMA: https://www.fema.gov/disaster/declarations
IRS: https://www.irs.gov/newsroom/tax-relief-in-disaster-situations
December 2025 Business Due Dates
December 15 – Corporations
The fourth installment of estimated tax for 2025 calendar year corporations is due.
December 15 – Social Security, Medicare and Withheld Income Tax
If you are an employer and the monthly deposit rules apply, December 15 is the due date for you to make your deposit of Social Security, Medicare, and withheld income tax for November 2025. This is also the due date for the nonpayroll withholding deposit for November 2025 if the monthly deposit rule applies.
December 31 – Caution! Last Day of the Year
If the actions you wish to take cannot be completed on the 31st or in a single day, you should consider taking action earlier than December 31st, as some financial institutions may be closed that day.
Weekends & Holidays:
If a due date falls on a Saturday, Sunday or legal holiday, the due date is automatically extended until the next business day that is not itself a legal holiday.
Disaster Area Extensions:
Please note that when a geographical area is designated as a disaster area, due dates will be extended. For more information whether an area has been designated a disaster area and the filing extension dates visit the following websites:
FEMA: https://www.fema.gov/disaster/declarations
IRS: https://www.irs.gov/newsroom/tax-relief-in-disaster-situations
If you have any questions, please contact our office at (503) 224-5321. Isler Northwest LLC is a firm of business advisors and CPAs in Portland, Oregon. Our service goal at Isler Northwest is to earn our clients’ trust as their primary business and financial advisor.
Isler Northwest
(503) 224-5321
1300 SW 5th Avenue
Suite 2900
Portland, Oregon 97201
