401(k) Roth vs. Traditional Calculator (2026)
Compare Roth 401(k) and Traditional 401(k) using the 2026 elective-deferral limit ($24,500).
Inputs
How it works
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).
Frequently asked questions
Is this guaranteed?
No — these are projections that assume your inputs hold. Real markets and life are variable.
What's the 4% safe-withdrawal rule?
The Trinity Study suggests withdrawing 4% of a balanced portfolio in year one and adjusting for inflation typically lasts 30+ years.
Should I max out my 401(k)?
At minimum, capture the full employer match — that's free money. Beyond that, balance against debt payoff and emergency reserves.
Roth vs. Traditional?
Roth wins if you'll be in a higher tax bracket in retirement; Traditional wins if you'll be in a lower bracket.
When should I start saving?
Immediately. The single biggest variable in retirement success is years of compounding.