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 Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. Making Your Tax Bracket Work Have you explored all your options when it comes to managing your taxable income? Asset Allocation Consider how your assets are allocated and if that allocation is consistent with your time frame and risk tolerance.