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 Medicare At 65+ 65 or older? It may be time to enroll in Medicare. Read to learn if you’re eligible. Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. Why Regular Rebalancing Makes Sense Without your knowing, your investment portfolio could be off-kilter.