Corporate Income Tax Rates
| State | Top Rate | Last Change |
|---|---|---|
| Iowa | 12.00% | 1981 - Increase from 10.00% |
| Arkansas | 6.50% | Never changed |
| Illinois | 9.50% | 2017 - Cut |
| Indiana | 6.25% | 2015 - Cut |
| Kansas | 7.00% | 2011 - Fluctuates |
| Michigan | 6.00% | 2011 - Cut |
| Minnesota | 9.80% | unknown |
| Missouri | 6.25% | unknown |
| Nebraska | 7.81% | unknown |
| N. Dakota | 4.31% | 2015 - Cut |
| Ohio | 0.26% Gross Receipts Tax | Fluctuates |
| Oklahoma | 6.00% | unknown |
| S. Dakota | - No Tax | - |
| Wisconsin | 7.90% | unknown |
Arkansas assesses a surcharge of 3% of the taxpayer’s total liability.
Ohio does not have a corporate income tax but does have a gross receipts tax with a rat not strictly comparable to corporate.
Source: taxfoundation.org/state-corporate-income-tax-rates-and-brackets-2016/
History of Iowa Corporation Income Tax Rates and Brackets
Effective Tax Year |
Rates and Income Tax Brackets |
| 1934 | Flat rate of 2.0% |
| 1955 | Rate increased to 3.0% |
| 1957 | Rate lowered to 2.0% |
| 1959 | Rate increased to 3.0% |
| 1965 | Rate increased to 4.0% |
| 1967 | Additional rates increased with 3 taxable income brackets:
Up to $25,000 – 4.0% $25,000 to $100,000 – 6.0% Over $100,000 – 8.0% |
| 1971 | Up to $25,000 – 6.0%
$25,000 to $100,000 – 8.0% Over $100,000 – 10.0% |
| 1981 | Up to $25,000 – 6.0%
$25,000 to $100,000 – 8.0% $100,000 to $250,000 – 10.0% Over $250,000 – 12.0% |