Tax deadlines 2027 — Titanium Taxes

Late Jan. 2027

Filing season opens Federal

The IRS announces the exact date each January; e-filed returns are accepted from that date.

Jan. 15, 2027

4th-quarter 2026 estimated tax due Federal + CA

Federal (Form 1040-ES) and California (Form 540-ES, 30%).

Apr. 15, 2027

2026 tax returns & payments due Federal + CA

Federal Form 1040 and California Form 540 due; also the deadline to request an extension. 1st-quarter 2027 estimated tax due (federal; California 30%).

Jun. 15, 2027

2nd-quarter 2027 estimated tax due Federal + CA

Federal and California (California 40%).

Sep. 15, 2027

3rd-quarter 2027 estimated tax due Federal

Federal only — California requires 0% for this period.

Oct. 15, 2027

Extended returns due Federal + CA

Last day to file 2026 returns on extension. An extension gives more time to file, not more time to pay.

Jan. 2028

4th-quarter 2027 estimated tax due Federal + CA

Jan. 15, 2028 falls on a Saturday, so payment is due the next business day.

Dates can shift: when a deadline falls on a weekend or legal holiday it moves to the next business day, and the IRS and FTB often postpone deadlines for areas affected by disasters. Confirm at irs.gov and ftb.ca.gov. Business and fiscal-year filers have different dates — ask us.