Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Related Content The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. What Is My Current Net Worth? Use this calculator to estimate your net worth by adding up your assets and subtracting your liabilities. How Much Home Can I Afford? With a few simple inputs you can estimate how much of a mortgage you may be able to obtain.