when are taxes due in california

Quick Scoop

California personal income tax returns and any balance due are due on April 15, 2026. California also gives an automatic extension to file until October 15, 2026 , but payment is still due by April 15 to avoid penalties and interest.

Key dates

• File and pay: April 15, 2026

• Automatic filing extension: October 15, 2026

• Estimated tax payments: April 15, June 15, September 15, and January 15 each year; for 2026, the fourth-quarter payment is due January 15, 2027

Small note

If your tax due date falls on a weekend or holiday, it can move to the next business day, but for 2026 the California personal return deadline is April 15.

If you want, I can also give you the California business tax deadlines or the 2026 estimated tax schedule in a simple table.