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 “Dirty Dozen” Tax Scams to Watch For Every year the IRS releases its list of tax scams, spotlighting some ways that people try to separate you from your money. You May Need to Make Estimated Tax Payments If… Have income that isn’t subject to tax withholding? Or insufficient withholdings? You may have to pay estimated taxes. Death is No Excuse The federal government requires deceased individuals to file a final income tax return.