A 401(k) contribution can be an effective retirement tool. As of January 2006, there is a new type of 401(k) - the Roth 401(k). The Roth 401(k) allows you to contribute to your 401(k) account on an after-tax basis - and pay no taxes on qualifying distributions when the money is withdrawn. For some investors, this could prove to be a better option than contributing on a pre-tax basis, where deposits are subject to taxes when the money is withdrawn. Use this calculator to help determine the best option for your retirement. By changing any value in the following form fields, calculated values are immediately provided for displayed output values. Click the view report button to see all of your results.