When are business federal taxes due?

While Tax Day is the only date some people may have on their calendar, there are actually many important business tax deadlines throughout the year. To find out the answer to “when are business taxes due?” keep reading!

2021 Tax Deadlines for Filing 2020 Business Returns

Partnership Tax Deadlines

Original tax deadline for partnerships (Form 1065)

Due: March 15, 2021

Extension tax deadline for partnerships (Form 1065)

Due: Sept. 15, 2021

S Corporation Tax Deadlines

Original tax deadline for S Corporations (Form 1120-S)

Due: March 15, 2021

Extension tax deadline for S Corporations (Form 1120-S)

Due: September 15, 2021

C Corporation Tax Deadlines

Original tax deadline for C Corporations (Form 1120)

Due: April 15, 2021

Extension tax deadline for C Corporations (Form 1120)

Due: October 15, 2021

Sole Proprietor Tax Deadlines

Original tax deadline for sole proprietors and individuals (Form 1040)

Due: April 15, 2021

Extension tax deadline for sole proprietors and individuals (Form 1040)

Due: October 15, 2021

Nonprofit Tax Deadlines

Original tax deadline for exempt organizations (Form 990)

Due: May 15*, 2021

Extension tax deadline for exempt organizations (Form 990)

Due: November 15, 2021

* May 15 is a Sunday, so the deadline will be the next business day, which is Monday, May 17, 2021.