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 Understanding Equity Compensation Net Unrealized Appreciation and how it affects tax responsibilities. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government. Putting a Price Tag On Your Health Being healthy not only makes you feel good, it may also help you financially.