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 The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are. Three Key Questions to Answer Before Taking Social Security When to start? Should I continue to work? How can I maximize my benefit? To Buy or Not to Buy The decision whether to buy or rent a home may have long-term implications.