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Important Dates

These are important dates for filings of tax returns and the management of companies.

Reminder for Corporations:
Estimated tax payment due dates are the 15th day of the 4th, 6th, 9th, and 12th months of the corporate tax year. See Instructions for Form 1120-W for additional information.

Tax Calendar

  • January 15, 2012
    Last day to pay estimated tax for 2011.
    See the IRS tax Calendar for more detail.
  • January 31, 2012
    Last day to give W2s and 1099s to employees.
    See the IRS tax Calendar for more detail.
  • February 28, 2012
    Last day to file information returns.
    File information returns, including Forms 1098, 1099 and W-2G for payments made during 2011. File Form W-3 with Copy A of all Forms W-2 issued for 2011.              Farmers and Fisherman: File 2011 Form 1040 and pay any tax due. However, you have until Apr 15 to file if you paid your 2011 estimated tax payments by Jan 15, 2012.
  • March 15, 2012
    Last day to file form 1120 for calendar year Corporations. Extension Form 7004.
    See the IRS tax Calendar for more detail.
  • April 15, 2012
    Last day to file form 1040 for Individuals. Extension Form 4868. First installment of estimated tax for 2012. 
    See the IRS tax Calendar for more detail.
  • May 2, 2011  Last day to file form 941 for first quarter. Pay Futa taxes if more than $500.
    See the IRS tax Calendar for more detail.
  • June 15, 2011
    Pay second installment of estimated tax.
    See the IRS tax Calendar for more detail.
  • August 1, 2011
    Last day to file form 5500 for benefit plans.
    See the IRS tax Calendar for more detail.
  • September 15, 2011
    Pay third installment of estimated tax. Last day to file Corporate Tax extended with 7004.
    See the IRS tax Calendar for more detail.
  • October 17, 2011
    Last day to file Individual and Partnership Tax forms on 6 month extension.
    See the IRS tax Calendar for more detail.
  • December 15, 2011
    Corporations pay last installment of estimated tax for 2011.  
    See the IRS tax Calendar for more detail.
  • January 15, 2012
    Individuals pay last installment of estimated tax for 2011.  
    See the IRS tax Calendar for more detail.

Recurring Tax Events

  • Payroll Taxes
    See IRS tax calendar IRS Calendar. 3 days to pay for large semi weekly payers, by the 15th of the month following for Monthly filers. By the end of the month following each quarter for filing 941 and DE-6 forms.
  • Heavy Vehicle Use Tax
    Form 2290 needs to be filed the last business day of the month after a vehicle is put in service that qualifies as a Heavy Vehicle and the tax needs to be paid at that time.
  • Sales and Use Tax
    Sales and use tax in California have to be deposited on a schedule that is different for different types of payors.        California Sales Tax Calendar
  • OSHA Deadlines
    Form 300 needs to be posted from February 1st to April 30 of the year subsequent to the reporting year. You must report injuries that result in overnight stays in the hospital or the loss of part of the body within 8 hours of the injury. You do not need to file the OSHA 300 form, but you must keep it for 5 years. OSHA 300 Guidelines