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 Medicare vs. Medicaid The terms Medicare and Medicaid sound similar but are two very different things. Learn the differences in this informative article. What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates.