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 How Income Taxes Work A quick look at how federal income taxes work. Comparing Mortgage Terms Estimate the total cost in today's dollars of various mortgage alternatives. Protection Against Uninsured Drivers You’re hit by an uninsured driver. Now what? Are you protected against financial losses?