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 Question Thank you! Oops! Related Content A Taxing Story: Capital Gains and Losses Understanding how capital gains are taxed may help you refine your investment strategies. Understanding Equity Compensation Net Unrealized Appreciation and how it affects tax responsibilities. The Financial Literacy Crisis Many Americans are operating their personal finances with only the barest minimum of knowledge.