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 Roth 401(k) vs. Traditional 401(k) This calculator compares employee contributions to a Roth 401(k) and a traditional 401(k). Test Your Life Insurance Knowledge How much do you know about one of the most important tools you have to help protect your and your family’s financial future? What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money.