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 Personal Finance Calendar Use this handy calendar to remember the year’s most important financial dates. Silver Sneakers 101 Medicare’s popular program, offering free gym membership and health education. Social Security: Maximizing Benefits There are other ways to maximize Social Security benefits, in addition to waiting to claim them.