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 What's So Great About a Rollover? Making a career move requires tough decisions, not the least of which is what to do with the funds in your retirement plan. Choices for Your 401(k) at a Former Employer Individuals have four basic choices with the 401(k) account they accrued at a previous employer. What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month.