California extends filing deadline for taxpayers impacted by winter storms

California’s Governor, Gavin Newsom, extends the California income tax deadlines to file individual and business income tax returns and payments to Oct. 16, 2023, for taxpayers affected by the December and January winter storms.

The extension applies to taxpayers impacted by severe winter storms, flooding, landslides, and mudslides in specific counties. It is intended to align state due dates with the extended due dates announced by the IRS. According to Governor Newsom’s announcement to extend deadlines, the relief applies to residents and businesses in the following counties:

The extended deadline applies to original deadlines occurring on or after Jan. 8, 2023, and prior to Oct. 16, 2023. For calendar basis taxpayers, this time includes:

  • Individual tax returns typically due April 18, 2023
  • Estimated tax payments typically due Jan. 17, April 18, June 15, and Sept. 15, 2023
  • Business tax returns typically due March 15 or April 18
  • PTE elective tax payments typically due June 15, 2023

What does CohnReznick think?

California taxpayers located in the applicable counties should consider availing themselves of the relief being provided by the state to extend the due date of returns and payments.


Krista Schipp, Director, State and Local Tax Services


Jamie Kelly, Manager, State and Local Tax Services



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Any advice contained in this communication, including attachments and enclosures, is not intended as a thorough, in-depth analysis of specific issues. Nor is it sufficient to avoid tax-related penalties. This has been prepared for information purposes and general guidance only and does not constitute legal or professional advice. You should not act upon the information contained in this publication without obtaining specific professional advice specific to, among other things, your individual facts, circumstances and jurisdiction. No representation or warranty (express or implied) is made as to the accuracy or completeness of the information contained in this publication, and CohnReznick LLP, its partners, employees and agents accept no liability, and disclaim all responsibility, for the consequences of you or anyone else acting, or refraining to act, in reliance on the information contained in this publication or for any decision based on it.