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 Are Subscriptions Cutting into Your Retirement Savings? While some subscriptions can enhance your daily routines, they can also sneakily erode your retirement savings. A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government. Gap Insurance for Leased Cars If you’re thinking of leasing a new car, then you shouldn’t forget about gap insurance.