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 The Junk Drawer Approach to Investing It's easy to let investments accumulate like old receipts in a junk drawer. Consider These 3 Things Before Driving Off the Lot Here are 3 quick tips to keep in mind when buying or leasing your next vehicle. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability.