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 Should You Tap Retirement Savings to Fund College? There are three things to consider before dipping into retirement savings to pay for college. Should You Invest in Exchange Traded Funds? There are thousands of ETFs available. Should you invest in them? Bi-Weekly Payments This calculator estimates the savings from paying a mortgage bi-weekly instead of monthly.