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 How Women Can Prepare For Retirement Are women prepared for a 20-year retirement? Retirement Traps to Avoid Beware of these traps that could upend your retirement. Stop Wasting Money One way to find money is to examine your current spending habits and eliminate money wasters.