Saving for Retirement This calculator can help you estimate how much you may need to save for retirement. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Related Content The Power of Tax-Deferred Growth Why are 401(k) plans, annuities, and IRAs so popular? What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.