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. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content The Anatomy of an Index The S&P 500 represents a large portion of the value of the U.S. equity market, it may be worth understanding. Financial Hacks for Millennials: Don’t Get Burnt With FIRE In recent years, a new personal finance concept has caught FIRE: Financial Independence, Retire Early. Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction.