California Tax Service Center

Important Dates for Income Tax

When the due date falls on a weekend or holiday, the deadline to file and pay without penalty is extended to the next business day.

January 15, 2017

2016 fourth quarter estimated tax payments due for individuals.

March 15, 2017

2016 S Corporation Income Tax returns due and tax due (for calendar year filers).

2016 Partnership and LLC Income Tax returns due and tax due (for calendar year filers).

April 18, 2017

2016 Personal Income Tax returns due and tax due

2016 Corporation Income Tax returns due and tax due (for calendar year filers).

2017 first quarter estimated tax payments due for individuals and corporations

June 15, 2017

2017 second quarter estimated tax payments due for individuals and corporations

September 15, 2017

2017 third quarter estimated tax payments due for individuals and corporations

Extended due date for 2016 S Corporation Income Tax returns (for calendar year filers)

Extended due date for 2016 Partnership and LLC Income Tax returns (for calendar year filers)

October 15, 2017

Extended due date for 2016 Personal Income Tax returns

Extended due date for 2016 Corporation Income Tax returns (for calendar year filers)

December 15, 2017

2017 fourth quarter estimated tax payments due for corporations

January 15, 2018

2017 fourth quarter estimated tax payments due for individuals