Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content It May Be Time for a Financial Checkup It’s never a bad time to speak with your financial professional about changes in your situation. Retirement Seen Through Your Eyes What's your vision of retirement? How Income Taxes Work A quick look at how federal income taxes work.