In the UK, when you look at income tax bands, it appears that way. For example, lower earners pay no tax, then the rate starts at 20%, growing to 40% for higher rate taxpayers. For each pound that a contractor earns over £150,000, the marginal rate becomes 45%, so higher earners pay more tax. Our income tax calculator calculates your federal, state and local taxes based on several key inputs: your household income, location, filing status and number of personal exemptions. Also, we separately calculate the federal income taxes you will owe in the 2019 - 2020 filing season based on the Trump Tax Plan. The Tax-Rates.org Tax Calculator 20 19. The Tax-Rates.org Income Tax Calculator can estimate state income taxes, payroll taxes, and self-employment tax as well as your income tax. Choose what you would like us to calculate.