Historical rates
United States Corporate income tax history
A year-by-year entry point for United States Corporate income tax. The detail pages are optimized for queries like “what was the tax rate in [year]?”
Country
United States
Series
Corporate income tax
Seed years
7
1994
IRS guidance reflects the OBRA 1993 graduated corporate rate structure with additional surtax language in IRC section 11 for higher taxable income bands.
Legislation
Pub. L. 103-66
2017
The graduated corporate structure remained in effect for tax periods through 2017 before the TCJA moved most corporations to a flat 21% rate.
Legislation
26 U.S.C. § 11
2018
For taxable years beginning after December 31, 2017, IRC section 11 generally imposes a flat 21% corporate rate.
Legislation
Pub. L. 115-97, § 13001
2019
Florida published a temporary reduced corporate income/franchise tax rate of 4.458% for taxable years beginning January 1, 2019 through December 31, 2020.
Legislation
Florida corporate income tax
2021
Florida published a 3.535% corporate income/franchise tax rate for taxable years beginning January 1, 2021 through December 31, 2021.
Legislation
Florida corporate income tax
2022
Florida returned to a 5.5% published corporate income/franchise tax rate for taxable years beginning on or after January 1, 2022.
Legislation
Florida corporate income tax
2026
As of May 1, 2026, the federal corporate rate in section 11 remains 21% of taxable income for most corporations.
Legislation
26 U.S.C. § 11(b)
Primary sources
- IRS IRM 3.12.16.23 Corporate Income Tax RatesVerified 2026-05-01
- 26 U.S.C. section 11Verified 2026-05-01
- Florida corporate income taxVerified 2026-05-02
Important disclaimer
This library is for general tax education only. Always verify filing obligations, due dates, and tax consequences against the cited primary source or with a qualified tax professional.