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 Question Thank you! Oops! Related Content The History of Currency Currency has been around for a long time. Here’s a quick history lesson. Behavioral Finance An amusing and whimsical look at behavioral finance best practices for investors. Inflation & Your Money It's important to understand how inflation is reported and how it can affect investments.