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. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement. Emotional vs. Strategic Decisions Information vs. instinct. Are your choices based on evidence of emotion? 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.