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. Deciding When to Take Social Security One of the most common questions people ask about Social Security is when they should start taking benefits. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return.