Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. 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. What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability.