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 Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. The Average American Budget Learn about the average American budget in this fun and interactive piece. Six Surprising Facts About Retirement Confidence This attention-grabbing infographic covers retirement topics you may not have considered.