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 Question Thank you! Oops! Related Content Should You Borrow from Your 401(k)? Does it make sense to borrow from my 401(k) to pay off debt or to make a major purchase? Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.