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. Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns.