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 Content Retirement Victory Lap A confident retirement begins with a plan. Infographic: Risks at Retirement Make a plan to take these risks off the table. Silver Sneakers 101 Medicare’s popular program, offering free gym membership and health education.