Business 1120 Edition

Easy guidance & tools for your C Corporation tax return. Try online for free, pay when you file. Accuracy guaranteed!

Start For Free

Corporations

April 15

Deposit the first installment of estimated income tax for 2018. A worksheet, Form 1120-W, Estimated Tax for Corporations, is available to help you estimate your tax for the year.

File a 2017 calendar year income tax return (Form 1120) and pay any tax due. If you want an automatic 6-month extension of time to file the return, file Form 7004, Application for Automatic Extension of Time to File Certain Business Income Tax, Information, and Other Returns, and deposit what you estimate you owe.

June 15

Deposit the second installment of estimated income tax for 2018. A worksheet, Form 1120-W, is available to help you estimate your tax for the year.

September 15

File a 2017 calendar year income tax return (Form 1120) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension. Otherwise, see March 15.

Deposit the third installment of estimated income tax for 2018. A worksheet, Form 1120-W, is available to help you estimate your tax for the year.

December 15

Deposit the fourth installment of estimated income tax for 2018. A worksheet, Form 1120-W, is available to help you estimate your tax for the year.

If you operate on a fiscal year, see tax calendar information for Fiscal-Year Taxpayers.

July 2018
S M T W T F S
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31

Upcoming Tax Dates

July 4 — Everyone
Federal Holiday (Independence Day) Details

July 10 — Employees who work for tips
If you received $20 or more in tips during June, report them to your employer Details

July 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in June.

July 31 — Social security, Medicare, and withheld income tax
File Form 941 for the second quarter of 2017. Deposit or pay any undeposited tax under the accuracy of deposit rules.

View More Tax Dates