Roth 401(k) vs. Traditional 401(k) This calculator compares employee contributions to a Roth 401(k) and a traditional 401(k). 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 Bursting the Bubble Tulips were the first, but they won’t be the last. What forms a “bubble” and what causes them to burst? The Cost of Procrastination Don't let procrastination keep you from pursuing your financial dreams and goals. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.