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 Getting a Head Start on College Savings A few strategies that may help you prepare for the cost of higher education. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates.