California Tax Deadlines: Individual & Corporate Filing Guide

California Tax Deadlines: Individual & Corporate Filing Guide

Check California tax deadlines for individuals and C Corporations. Confirm due dates, extension rules, and exemptions for S Corps and Partnerships.

California adds franchise taxes, LLC fees, PTE elections, and accelerated estimates.

California Tax Deadlines at a Glance (2026)

Entity Type

Return Due

Extension

Individuals

April 15, 2026

October 15, 2026

C Corporations

April 15, 2026

October 15, 2026

S Corporations

March 16, 2026

September 15, 2026

Partnerships

March 16, 2026

September 15, 2026

LLC $800 Tax

April 15, 2026

No

PTE Tax

Elective entity-level tax with owner credit.

Fiscal-Year Entities

Still subject to minimum franchise tax.

Special Entities

  • Nonprofits

  • Insurance companies

  • Financial institutions

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Customer Stories

Trusted by firms across the board

"Research used to be a black hole. Now, I just type the question and get a citable IRS answer in seconds."

Tax Manager

Sama Tributa

"80% faster first drafts. What used to take us two days is now done in two hours."

Managing Partner

Northbridge Tax Advisory

Customer Stories

Trusted by firms across the board

"Research used to be a black hole. Now, I just type the question and get a citable IRS answer in seconds."

Tax Manager

Sama Tributa

"80% faster first drafts. What used to take us two days is now done in two hours."

Managing Partner

Northbridge Tax Advisory