IRS Form 1120 / 21% Federal Corporate Rate
US Corporate Income Tax Rates & Form 1120 Guide 2026
Comprehensive breakdown of US Corporate Income Tax (CIT). IRS 21% flat federal C-Corp rate, state corporate income taxes (0% to 11.5%), quarterly Form 1120-W estimated tax payments, and Form 5472 for foreign owners.
Frequently Asked Questions (FAQ)
Under the Tax Cuts and Jobs Act (TCJA), the federal corporate income tax rate for US C-Corporations is a flat 21% on net taxable income.