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 Message Thank you! Oops! Related Content Retirement Realities Many pre-retirees can become focused on the “ideal” retirement, but turning that dream into a reality can be tricky. Separating the Signal From the Noise A good professional provides important guidance and insight through the years. What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement.