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 How Stocks Work Understanding how a stock works is key to understanding your investments. Deciding When to Take Social Security One of the most common questions people ask about Social Security is when they should start taking benefits. Retirement Traps to Avoid Beware of these traps that could upend your retirement.