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 When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Starting a Roth IRA for a Teen This early financial decision could prove helpful over time. From Boats to Brokers From the Dutch East India Company to Wall Street, the stock market has a long and storied history.