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 Tax Efficiency in Retirement What role would taxes play in your investment decisions? Should I Buy or Lease an Auto? This calculator compares the financial impact of leasing versus buying an automobile. Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one.