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 Question Thank you! Oops! Related Content Gap Insurance for Leased Cars If you’re thinking of leasing a new car, then you shouldn’t forget about gap insurance. When Does Your Personal Car Become a Commercial Vehicle? At what point can you call a personal vehicle commercial? Medicare At 65+ 65 or older? It may be time to enroll in Medicare. Read to learn if you’re eligible.