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 Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. How to Make the Tax Code Work for You When you take the time to learn more about how it works, you may be able to put the tax code to work for you. What's So Great About a Rollover? Making a career move requires tough decisions, not the least of which is what to do with the funds in your retirement plan.