2023 California State Tax Deadlines

California Individual Income Tax Filing deadlines and extensions for 2023.

If you are a resident or have been involved in significant business operations within California then you might be required to file California State Taxes. We look at the most important tax deadlines and tax extensions for California in 2023.

California Business Tax Deadlines for 2023

C Corporation

California C Corporation Tax Deadlines for 2023

You must file & pay Corporate Income Taxes in California by April 18, 2024.

Applicable forms: Form 100 – California Corporation Franchise or Income Tax Return

Extension to File Taxes in California for 2023

You must send payment for taxes in California for the fiscal year 2023 by April 18, 2024. The Extension Deadline is November 15, 2024 to file your California corporate income tax return. California automatically grants 7 months extensions on filing corporate income tax returns. This means you do not need to file for an extension in California.

This is an extension to FILE, not an extension to PAY – payment is still due April 18, 2024.

Pass-Throughs

California S Corporation & Partnership Tax Deadlines for 2023

You must file in California by March 15, 2024.

Form 100S – California S Corporation Franchise or Income Tax Return Form 565 – Partnership Return of Income Form 568 – Limited Liability Company Return of Income

Extension to File S Corporation & Partnership Taxes in California for 2023

You must send payment for taxes in California for the fiscal year 2023 by March 15, 2024. The Extension Deadline is September 15, 2024 to file your California S-Corporation income tax return. The Extension Deadline is October 15, 2024 to file your California partnership income tax return.

California automatically grants a 6 month extension on filing S-Corporation income tax returns and automatically grants a 7 month extension on filing Partnership income tax returns. This means you do not need to file for an extension in California.

This is an extension to FILE, not an extension to PAY – payment is still due March, 15 2024.

California Individual Tax Deadlines for 2023

Estimated Tax Deadline for California 2023

Estimated tax payments should be made:

• April 18, 2023
• June 15, 2023
• September 15, 2023
• January 17, 2024

Individual Tax Deadline for California 2023

You must file & pay Individual Income Taxes in California by April 18, 2024.

File Online for free File by Mail must be postmarked by the due date.

Applicable forms: Form 540NR- Part Year or Non-Resident Form 540 – Full Year Residents

Extension to File Taxes in California for 2023

You must send payment for taxes in California for the fiscal year 2023 by April 18, 2024. The Extension Deadline is October 16, 2024 to file your California Individual Income tax return.

California automatically grants 6 months extensions on filing personal income taxes. This means you do not need to file for an extension in California.

This is an extension to FILE, not an extension to PAY – payment is still due April 18, 2024.

Estates Tax Deadline for California 2023

California Estate Tax filings are due April 18, 2024.

Farmer and Fisherman Taxes for California 2023

If you are a farmer or fisherman, and at least two-thirds of your 2022 and 2023 gross income is from farming or fishing, you may do either of the following:

• Pay all of your estimated tax by January 17, 2024.
• File your tax return for 2023 on or before March 1, 2024, and pay the total tax due. In this case, you need not make estimated tax payments for 2023.