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 Insurance Needs Assessment: When You're Newly Married Marriage changes everything, including your insurance needs. Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable.