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 Tuning Your Social Security Benefit When should you take your Social Security benefit? Is Term Life Insurance for You? Term insurance is the simplest form of life insurance. Here's how it works. Inflation & Retirement Estimate how much income may be needed at retirement to maintain your standard of living.