Last updated on: 10/20/2021 | Author: ProCon.org

Federal Corporate Income Tax Rates

The federal corporate income tax was fist implemented in 1909, when the uniform rate was 1% for all business income above $5,000. Since then the rate peaked at 52.8% in 1969. On Jan. 1, 2018, the corporate tax rate was changed from a tiered structure that staggered corporate tax rates based on company income to a flat rate of 21% for all companies.

YearRate Brackets or ExemptionsRate (a)
1909-1913$5,000 exemption1%
1913-1915No exemption after March 1, 19131%
1916None2%
1917None6%
1918$2,000 exemption12%
1919-1921$2,000 exemption10%
1922-1924$2,000 exemption13%
1925$2,000 exemption13%
1926-1927$2,000 exemption14%
1928$3,000 exemption12%
1929$3,000 exemption11%
1930-1931$3,000 exemption12%
1932-1935None14%
1936-1937First $2,000
Over $40,000
8%
15%
1938-1939First $25,000
Over $25,000
12.5-16%
19% (b)
1940First $25,000
$25,000 to $31,964.30
$31,964.30 to $38,565.89
Over $38,565.89
14.85-18.7%
38%
37%
24%
1941First $25,000
$25,000 to $38,461.54
Over $38,461.54
21-25%
44%
31%
1942-1945First $25,000
$25,000 to $50,000
Over $50,000
25-29%
53%
40%
1946-1949First $25,000
$25,000 to $50,000
Over $50,000
21-25%
53%
38%
1950First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 19%)
Excess Profits Tax
23%
42%
30%
1951First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 22%)
Excess Profits Tax
28.75%
50.75%
30%
1952First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 22%)
Excess Profits Tax
30%
52%
30%
1953-1963First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 22%)
30%
52%
1964First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 28%)
22%
50%
1965-1967First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 26%)
22%
48%
1968-1969First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 26%)

With 10% Surcharge
First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 26%)
22%
48%


24.20%
52.80%
1970First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 26%)

With 2.5% Surcharge (c)
First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 26%)
22%
48%


22.55%
49.20%
1971-1974First $25,000 (Normal Rate)
Over $25,000 (Add Surtax of 26%)
22%
48%
1975-1978First $25,000 (Graduated Normal Rate)
Next $25,0000 (Graduated Normal Rate)
Over $50,000 (Add Surtax of 26%)
20%
22%
48%
1979-1981 (d)First $25,000
$25,000 to $50,000
$50,000 to $75,000
$75,000 to $100,000
Over $100,000
17%
20%
30%
40%
46%
1982First $25,000
$25,000 to $50,000
$50,000 to $75,000
$75,000 to $100,000
Over $100,000
16%
19%
30%
40%
46%
1983-1984First $25,000
$25,000 to $50,000
$50,000 to $75,000
$75,000 to $100,000
Over $100,000
15%
18%
30%
40%
46%
1985-1986First $25,000
$25,000 to $50,000
$50,000 to $75,000
$75,000 to $100,000
$100,000 to $1,000,000
$1,000,000 to $1,405,000 (e)
Over $1,405,000
15%
18%
30%
40%
46%
51%
46%
1987(f)-1993First $50,000
$50,000 to $75,000
$75,000 to $100,000
$100,000 to $335,000 (g)
Over $335,000
15%
25%
34%
39%
34%
1994-2017First $50,000
$50,000 to $75,000
$75,000 to $100,000
$100,000 to $335,000 (g)
$335,000 to $10,000,000
$10,000,000 to $15,000,000
$15,000,000 to $18,333,333 (h)
Over $18,333,333
15%
25%
34%
39%
34%
35%
38%
35%
2018-2021None21%

(a) In addition to the rates shown, certain types of ‘excess profits’ levies were in effect in 1917-1921 and 1933-1945

(b) Less adjustments: 14.025% of dividends received and 2.5% of dividends paid.

(c) The Tax Reform Act of 1969 extended the Surcharge at a 5 percent rate from January 1, 1970 through June 1, 1970. On an annualized basis the Surcharge would be 2.5 percent.

(d) The Revenue Act of 1978 repealed the corporate normal tax and surtax and in their place imposed a graduated rate structure with five brackets.

(e) The Deficit Reduction Act of 1984 placed an additional 5 percent to the tax rate in order to phase out the benefit of the lower graduated rates for corporations with taxable income between $1,000,000 and 1,405,000. Corporations with taxable income above $1,405,000, in effect, pay a flat marginal rate of 46 percent.

(f) Rates shown effective for tax years beginning on or after July 1, 1987. Taxable income before July 1, 1987 was subject to a two tax rate schedule or a blended tax rate.

(g) An additional 5 percent tax, not exceeding $11,750, is imposed on taxable income between $100,000 and $335,000 in order to phase out the benefits of the lower graduated rates.

(h) An additional 3 percent tax, not exceeding $100,000, is imposed on taxable income between $15,000,000 and $18,333,333 in order to phase out the benefits of the lower graduated rates.


Sources

Tax Foundation, “Federal Corporate Income Tax Rates, Income Years 1909-2012,” taxfoundation.org, July 6, 2012

Tax Foundation, “Historical U.S. Federal Corporate Income Tax Rates & Brackets, 1909-2020,” taxfoundation.org, Aug. 24, 2021

RSM, “2015 Federal Tax Rates,” rsmus.com, Jan. 1, 2015

RSM, “2016 Federal Tax Rates,” rsmus.com, Jan. 1, 2016

RSM, “2017 Federal Tax Rates,” rsmus.com, Jan. 1, 2017

United States Congress, “H.R.1 – An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018,” congress.gov (accessed Feb. 5, 2018)