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 Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction. When Does Your Personal Car Become a Commercial Vehicle? At what point can you call a personal vehicle commercial? To Buy or Not to Buy The decision whether to buy or rent a home may have long-term implications.