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 Where Is the Market Headed? We all know the stock market can be unpredictable. We all want to know, “What’s next for the financial markets?” What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month. Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA.