January 31, 2026

W2 and 1099-NEC due to recipients and IRS

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March 16, 2026

Partnership, S Corp tax return due (IRS & FTB)

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April 15, 2026

Individual Tax Returns Due  (FTB & IRS)

Individual Tax Return Extension Form Due  (FTB & IRS)

1st Quarter 2026 Estimated Tax Payment Due (FTB & IRS)

C Corp tax return/payment due (FTB & IRS)

 

June 15, 2026

2nd Quarter Estimated Tax Payment Due (FTB & IRS)

 

September 15, 2026

3rd Quarter Estimated Tax Payment Due (FTB & IRS)

Extended S Corps and partnerships tax return Due (FTB & IRS)

 

October 15, 2026

Extended Individual Tax Returns Due (FTB & IRS)

Extended C Corp Tax Return Due (FTB & IRS)

 

December 15, 2026

4th Quarter estimated tax payment due for C Corp (IRS)

 

January 15, 2027

4th Quarter Estimated Individual and C Corp Tax Payment Due (FTB)