Tax Date Calendar for Small Businesses


April 15 may be in your rear view mirror, but your business still has tax-related obligations throughout the year. Don’t let these dates sneak up on you unexpectedly. Know what you need to file and when for the upcoming year:tax preparation

June 17, 2019: Q3 Estimated Quarterly Income Tax Payments Due

If your business pays estimated quarterly taxes, and these payments were prepared along with your Simma Flottemesch & Orenstein tax return, this is the deadline for your Quarter 2 payment.

September 16, 2019: Q3 Estimated Quarterly Income Tax Payments Due

Time to make your Quarter 3 payment.

September 16, 2019: S-Corp and Partnership Extension Deadline

Did you receive an extension for your S-Corp or partnership tax return? Then this is your deadline for submitting the return and payment.

October 15, 2019: Extension Deadline for Individuals, Sole Proprietors, LLCs and Corporations

This is the deadline for submitting your return and payment for any extended individual, sole proprietor, LLC or C-Corp tax returns.

December 31, 2019: 401(k) Deadline

Any contributions to you or your employee’s 401(k) but be completed by the end of the year if they’re to count toward your 2019 return.tax calendar

January 15, 2020: Q4 Estimated Quarterly Income Tax Payments Due

The taxes that were estimated for Quarter 4 are due in mid-January.

January 31, 2020: 1099 and W-2 Mailing Deadline

For your traditional employees, you must get their W-2 forms in the mail by the end of January. Any 1099s for contractors you worked with during 2019 must be postmarked by January 31 as well.

March 16, 2020: S-Corp and Partnership Tax Return Deadline

S-Corps and partnerships must file their 2019 tax return and submit payment by March 16, a month before the individual return deadline.

April 15, 2020:

  • Tax filing deadline for individual, sole proprietor, LLC and C-Corp returns
  • Q1 estimated quarterly income tax payments due
  • Simple Employee Pension (SEP) contribution deadline
  • IRA contribution deadline, for both traditional and Roth IRA accounts