Estimate Your 2018 Tax Rate: What is my tax bracket? Find out which IRS tax bracket you are in. As a percentage of income, your tax rate is generally lower than the tax rate listed. Use this calculator to estimate your actual tax rate and tax amount. Filling Status: Single Married filing jointly Married filing separately Head of Household Taxable Income: $ .00 Calculate Tax Clear Calculator Your tax year 2018 tax rate: To view an example of a tax bracket calculator, visit: https://www.taxact.com/tools/tax-bracket-calculator