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 Ever Retire? A growing number of Americans are pushing back the age at which they plan to retire. Or deciding not to retire at all. The Richest Man in Babylon In good times and bad, consistently saving a percentage of your income is a sound financial practice. Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy.