Traditional 401(k) vs Roth 401(k): Full 2026 Comparison

Quick Answer

A Traditional 401(k) reduces your taxable income today — you pay taxes on withdrawals in retirement. A Roth 401(k) uses after-tax dollars now so qualified withdrawals are 100% tax-free. If you expect to be in a higher tax bracket in retirement, the Roth wins; if your tax rate is likely to fall, the Traditional wins.

Both the Traditional 401(k) and Roth 401(k) are employer-sponsored retirement accounts with the same 2026 contribution limit of $23,500 ($31,000 if age 50+ via catch-up). The critical difference is timing: Traditional contributions lower your taxable income now, while Roth contributions are made with after-tax dollars so growth and qualified withdrawals are tax-free. Since 2024, the SECURE 2.0 Act eliminated Required Minimum Distributions (RMDs) for Roth 401(k)s while you are alive — a major planning advantage. Many plans let you split contributions between both, giving you tax diversification. Your age, current vs. expected future tax rate, and employer match are the key decision factors.

Traditional 401(k) vs Roth 401(k): Side-by-Side

Feature	Traditional 401(k)	Roth 401(k)
Tax treatment	Pre-tax; reduces current taxable income	After-tax; no current tax break
2026 contribution limit	$23,500 ($31,000 age 50+)	$23,500 ($31,000 age 50+)
Income limits	None	None
Employer match	Yes (taxable when withdrawn)	Yes (match goes to traditional side)
Withdrawals in retirement	Taxed as ordinary income	Tax-free (after age 59½, 5-yr rule)
Required Minimum Distributions	Yes, starting at age 73	No RMDs (post-SECURE 2.0 Act)
Early withdrawal penalty	10% + income tax before 59½	10% on earnings only before 59½
Best for	High earners expecting lower taxes in retirement	Young earners or those expecting higher future taxes

Tax treatment

Traditional 401(k)

Pre-tax; reduces current taxable income

Roth 401(k)

After-tax; no current tax break

2026 contribution limit

Traditional 401(k)

$23,500 ($31,000 age 50+)

Roth 401(k)

$23,500 ($31,000 age 50+)

Income limits

Traditional 401(k)

None

Roth 401(k)

None

Employer match

Traditional 401(k)

Yes (taxable when withdrawn)

Roth 401(k)

Yes (match goes to traditional side)

Withdrawals in retirement

Traditional 401(k)

Taxed as ordinary income

Roth 401(k)

Tax-free (after age 59½, 5-yr rule)

Required Minimum Distributions

Traditional 401(k)

Yes, starting at age 73

Roth 401(k)

No RMDs (post-SECURE 2.0 Act)

Early withdrawal penalty

Traditional 401(k)

10% + income tax before 59½

Roth 401(k)

10% on earnings only before 59½

Best for

Traditional 401(k)

High earners expecting lower taxes in retirement

Roth 401(k)

Young earners or those expecting higher future taxes

Which Should You Choose?

Choose the Traditional 401(k) if you are currently in the 22%+ tax bracket and expect to be in a lower bracket in retirement — the upfront deduction is worth more to you now. Choose the Roth 401(k) if you are early in your career, in the 12% or lower bracket, or believe tax rates will rise. The elimination of Roth 401(k) RMDs is a powerful estate-planning bonus. Many financial advisors recommend splitting contributions between both accounts for tax diversification — you get some tax savings now and tax-free income later.

Run the Numbers

Traditional 401(k) Calculator →

Frequently Asked Questions

Can I contribute to both a Traditional and Roth 401(k) in the same year?+

Yes. You can split your contributions between Traditional and Roth 401(k) any way you like, as long as the total does not exceed $23,500 ($31,000 age 50+) for 2026.

Does my employer match go into the Traditional or Roth 401(k)?+

Employer matching contributions always go into the Traditional (pre-tax) side, even if your own contributions are all Roth. Starting 2024, some plans now allow Roth employer matches — check your plan documents.

What happens to my Roth 401(k) if I leave my job?+

You can roll a Roth 401(k) into a Roth IRA with no taxes or penalties. This preserves tax-free growth and eliminates future RMDs.

Which has better investment options?+

Both use the same menu of investment funds your employer offers. There is no difference in available investments between the Traditional and Roth 401(k) sides.

Is the 5-year rule different for Roth 401(k) vs Roth IRA?+

Yes. For a Roth 401(k), the 5-year clock starts January 1 of the year you first made a Roth 401(k) contribution at that plan. Rolling to a Roth IRA restarts the clock if you have not had a Roth IRA for 5 years.

Related Comparisons

Roth IRA vs Traditional IRA

Both IRAs share the same $7,000 contribution limit ($8,000 if 50+) for 2026. The Roth IRA offers tax…

401(k) vs Roth IRA

Fund your 401(k) at least up to the employer match first — that is a guaranteed 50%–100% instant ret…

401(k) vs IRA: Contribution Strategy

Fund your 401(k) up to the full employer match first — this is a guaranteed 50%–100% return and cann…

Solo 401(k) vs SEP-IRA

For self-employed individuals with no employees, the Solo 401(k) almost always allows higher contrib…

Disclaimer: This comparison is for informational purposes only and does not constitute financial, tax, or legal advice. IRS figures shown are for the 2026 tax year. Tax laws change — verify current limits at IRS.gov. Consult a qualified financial advisor before making retirement, investment, or tax decisions.