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 Four Really Good Reasons to Invest There are four very good reasons to start investing. Do you know what they are? Working With A Financial Professional A financial professional is an invaluable resource to help you untangle the complexities of whatever life throws at you. The Economic Journey of Your Morning Coffee Few contemplate the complex journey that brought their coffee from farm to kitchen table.