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 | Related Content Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. Death is No Excuse The federal government requires deceased individuals to file a final income tax return. Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax.