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. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement.