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. Related Content Does Your Child Need to File an Income Tax Return? When your child has income, there’s a good chance that he or she will need to report it and pay taxes. Silver Sneakers 101 Medicare’s popular program, offering free gym membership and health education. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates.