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Contact UsDeadline Dates 2026
WHAT YOU NEED TO KNOW
Often business owners are so busy with immediate tasks and emergencies that important compliance deadlines can slip past - often resulting in late fees and penalties as well as additional paperwork. This list of important deadlines will help stave off late filings and missed deadlines.
Popular Forms & Publications
- 1099's: 02/02
- Income Taxes for Sole Proprietors: 04/15
- W-2's: 02/02
- S-Corps: 03/16
- C-Corps: 04/15
- LLC's: 03/16 or 04/15 (depending on tax classification - partnerships/S-corps are 03/16, C-corps are 04/15)
- All Extensions Due Date: 10/15
Federal Payroll Tax Deadlines (940/941):
- 1st Qtr – 04/30
- 2nd Qtr – 07/31
- 3rd Qtr – 11/02
- 4th Qtr – 02/01/2027
Sales Tax Pre-Payments:
- 02/24
- 03/24
- 05/26
- 06/24
- 08/24
- 09/24
- 11/24
- 12/24
Annual Filings:
- 01/31/2027
Estimated Taxes Personal and Business:
- 1st Payment – 04/15
- 2nd Payment – 06/15
- 3rd Payment – 09/15
- 4th Payment – 01/15/2027
Sales Tax - Quarterly Filings: Sales tax deadlines can vary significantly by state. Most states use the 20th of the month following the quarter end, below dates are for California:
- 1st Qtr – 04/20
- 2nd Qtr – 07/20
- 3rd Qtr – 10/20
- 4th Qtr – 01/20/2027
California State Payroll Tax Deadlines (DE9):
- 1st Qtr – 04/30
- 2nd Qtr – 07/31
- 3rd Qtr – 11/02
- 4th Qtr – 02/01/2027
Biannual Filings:
- 06/30
- 01/31/2027