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 Lifetime of Earnings Estimate how much you have the potential to earn during your working years. What is the Value of Your Business? Ascertaining the value of your business is important for a variety of reasons. The Other Sure Thing Though we don't like to think about it, all of us will make an exit sometime. Are you prepared?