Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax.