Hans Kasper, MS-CPA, PS

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Business Income Tax Calendar

Note: If any date below falls on a Saturday, Sunday, or Federal holiday, use the next business day.

Form or Action

Due Date

Form 1120 "C" corporation and 1120S "S" corporation due date

March 15th

Form 7004 automatic extension for corporations for 6 months until October 15th to file Form 1120*/** or 1120S***.  There are no 2nd extensions for corporations.
Send certified mail if taxes are due.
* Payment of taxes due must be made with the filing of the extension or penalties (1/2% per month) and interest will be assessed until the tax return is filed and the taxes are paid.
** If the extension is not filed and taxes are due, then penalties of up to 5% per month plus interest will be assessed until the tax return is filed and the taxes are paid.
*** There is a penalty of $100 per month if the extension is not filed.

March 15th

Last day for the IRS to receive the tax return that you should have filed 3 years ago for you to receive a refund on that return.
* Notice that this date is for the IRS to receive the return in their hands and NOT for you to put it into the mail.
** Here is the rule: if you do not file (see above sentence) a tax return within 3 years from the original due date, then you will lose your refund period.

March 15th

Form 1120-W 1st quarter estimated payment for the current year.
* Make this payment to avoid estimated tax penalties.

April 15th

Form 1065 partnership due date

April 15th

Form 8736 automatic extension for partnerships for 3 months until July 15th to file Form 1065*.
* There is a penalty of $100 per month if the extension is not filed.

April 15th

County personal property tax

April 30th

Form 1120-W 2nd quarter estimated payment for the current year.
* Make this payment to avoid estimated tax penalties.

June 15th

Form 1065 partnership due date

July 15th

Form 8800 additional extension for partnerships for 3 months until October 15th to file Form 1065*.
* There is a penalty of $100 per month retroactive if the extension is not filed.

July 15th

Form 5500 for retirement plans other than Simple and SEP IRAs

July 31st

Form 1120-W 3rd quarter estimated payment for the current year.
* Make this payment to avoid estimated tax penalties.

September 15th

Form 1120*/** and 1120S*** - final date to file and pay tax.
* If this time period lapses by as little as one day and Form 1120 is not filed, then the first and second extensions are treated as having never been filed and all of the penalties apply retroactive back to April 15th.
** Therefore, file the return even if you can not pay the taxes.  Why?  Because, only the 1/2% penalty (failure to pay tax) and interest will apply and not the 5% penalty (failure to file).
*** There is a penalty of $100 per month if the return is not filed.

September 15th

Form 1065 partnership due date.
* There is a penalty of $100 per month retroactive if the return is not filed.

October 15th

Form 1120-W 4th quarter estimated payment for the current year.
* Make this payment to avoid estimated tax penalties.

December 15th

THE ABOVE IS A GENERAL LIST OF FILING REQUIREMENT DUE DATES.  OTHER DUE DATES MAY EXIST.  CONTACT A OUR OFFICE  TO DETERMINE ALL OF YOUR SPECIFIC FILING REQUIREMENTS.

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