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Compare Roth 401(k) and Traditional 401(k) using the 2026 elective-deferral limit ($24,500).
Monthly compounding · end-of-period contributions. Same gross contribution, capped at IRS 2026 limit for your age. Roth final is tax-free. Traditional final × (1 − retirement tax rate).
No — these are projections that assume your inputs hold. Real markets and life are variable.
The Trinity Study suggests withdrawing 4% of a balanced portfolio in year one and adjusting for inflation typically lasts 30+ years.
At minimum, capture the full employer match — that's free money. Beyond that, balance against debt payoff and emergency reserves.
Roth wins if you'll be in a higher tax bracket in retirement; Traditional wins if you'll be in a lower bracket.
Immediately. The single biggest variable in retirement success is years of compounding.
Results are estimates for educational purposes only and are not financial advice. Verify with a qualified professional before making decisions.
Last updated October 2026