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 Question Thank you! Oops! Related Content Inflation & Retirement Estimate how much income may be needed at retirement to maintain your standard of living. A Decision Not Made Is Still a Decision Investors who put off important investment decisions may face potential consequence to their future financial security. Is Term Life Insurance for You? Term insurance is the simplest form of life insurance. Here's how it works.