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 What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money. Emotional vs. Strategic Decisions Information vs. instinct. Are your choices based on evidence of emotion? Saving for College 101 Here’s a crash course on saving for college.