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. How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits. What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month.