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 The Five Basics of Financial Literacy How literate are you when it comes to your finances? Brush up with these five basics. Tax Efficiency in Retirement What role would taxes play in your investment decisions? Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible.