Roth 401(k) contributions grow completely tax-free, unlike a traditional 401(k).
Workers who direct part of each paycheck into a Roth 401(k) pay income tax on those dollars right away, but the tradeoff can be significant: every penny of investment growth in that account can come out tax-free in retirement, provided the withdrawal meets federal rules. Traditional 401(k) deferrals work the opposite way, shielding current income…