A 401(k) can be an effective retirement tool. As of January 2006, there is a new type of 401(k) contribution. Roth 401(k) contributions allow 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contribute to your 401(k) account on an after-tax basis and pay no taxes on qualifying distributions when the money is withdrawn.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 the Traditional 401(k) contributions, where deposits are made on a pre-tax basis, but are subject to taxes when the money is withdrawn. Use this calculator to help determine the option that could work for you and how it might affect your paycheck.