Traditional 401(k) vs Roth 401(k) — Which Pays Off?

Trad vs Roth 401(k)

Traditional 401(k) vs Roth 401(k) — Which Pays Off?

Same contribution limit ($23,000 in 2026). The difference is when you pay tax: now or later.

Verdict

Use Roth 401(k) if you expect to be in the same or higher tax bracket in retirement. Use Traditional 401(k) if you expect to be in a lower bracket. For most people in the 22-24% bracket today expecting lower retirement income, Traditional wins.

Side-by-side comparison

 Traditional 401(k)Roth 401(k)
Contribution treatmentReduces taxable income nowNo deduction now
Tax on withdrawalsOrdinary income at retirement100% tax-free at retirement
2026 contribution limit$23,000$23,000
Employer match treatmentAlways pre-taxMatch is pre-tax (separate sub-account)
RMDsYes, starting at 73Yes (but can roll to Roth IRA to avoid)
Best forHigh earners, expecting lower retirement bracketYounger workers, expecting higher future bracket

Who should pick Traditional 401(k)

Anyone in the 24%+ bracket who expects to retire in a lower bracket. Anyone who needs the tax deduction this year to stay below an income threshold (like the Roth IRA cap or Section 199A QBI phaseout).

Who should pick Roth 401(k)

Workers in the 12-22% bracket who expect higher future income. Anyone uncertain about future tax-law changes (Roth eliminates that risk). High earners doing the “Mega Backdoor Roth” strategy.

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Disclaimer. Comparison numbers depend on your tax bracket, state, and time horizon. Educational only — not personalized financial advice. See our Financial Disclaimer.

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