Who must file Form 1120?

Unless exempt under section 501, all domestic corporations (including corporations in bankruptcy) must file an income tax return whether or not they have taxable income.

What is the deadline for Form 1120?

For calendar year corporations, the return is generally due by April 15th. If your corporation uses a fiscal year, the return is due by the 15th day of the 4th month after the end of its tax year.

What is the current corporate tax rate?

Under current federal law (following the Tax Cuts and Jobs Act), C-Corporations are subject to a flat federal income tax rate of 21%.

Can I file an extension for Form 1120?

Yes, you can request an automatic 6-month extension of time to file Form 1120 by filing Form 7004 before the original due date of the return.

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Filing Year

2025

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How to file Form 1120

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Step 01Active

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Everything You Need to Know

Answers, insights, and step-by-step guidance

Frequently Asked Questions

Common questions about filing IRS Form 1120.