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 Retirement Redefined Around the country, attitudes about retirement are shifting. The Power of Compound Interest Learn how to harness the power of compound interest for your investments. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability.