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 Creative Ways to Motivate Your Employees Five creative (and inexpensive) ideas for motivating your employees. When Should You Take Social Security Monthly Social Security payments differ substantially depending on when you start receiving benefits. Critical Estate Documents Sound estate management includes creating financial and healthcare documents. Here's an inside look.