Side-by-side comparison

Roth vs Traditional 401(k)

Same retirement account, two different tax timings. The right answer depends on your current tax bracket, your expected retirement bracket, and a few other levers most calculators ignore.

By Peter Guggisberg, Financial AdvisorLast reviewed May 22, 2026

The quick answer

Pay taxes now or later. That's it.

Roth 401(k)

Pay tax now. Grow tax-free.

After-tax contributions, tax-free growth, tax-free qualified withdrawals. Wins if you expect higher taxes later.

Traditional 401(k)

Skip tax now. Pay later.

Pre-tax contributions lower your taxable income today. Every withdrawal in retirement is taxed as income.

Traditional 401(k) contributions reduce your taxable income today and you pay tax when you withdraw in retirement. Roth 401(k) contributions are made with after-tax dollars and grow tax-free forever, with no tax on qualified withdrawals. Choose Roth if you expect higher taxes later, traditional if you expect lower.

Most Hudson Valley households contributing to a 401(k) have access to both Roth and traditional options through their employer. The choice is not which one is better in the abstract. It is which one fits your tax bracket today, your expected bracket in retirement, and your overall household strategy.

Two real-world rules of thumb that get people 80% of the way there: if you are in your peak earning years with a high marginal tax rate, traditional usually wins. If you are early career or expect to retire in a higher-tax state than you live in now, Roth often wins.

By the numbers

$23,500 annual contribution at 32% marginal rate, 30 years at 7%

Roth costs more today but every dollar of growth is tax-free. Traditional saves taxes now but every withdrawal is taxed later.

Roth 401(k)

Traditional 401(k)

Illustrative example. Actual figures depend on individual circumstances (age, health, tax bracket, state, carrier) and may differ.

Side by side

Roth 401(k) vs Traditional 401(k)

Side-by-side: Roth vs traditional 401(k)
Attribute	Roth 401(k)	Traditional 401(k)
Contribution tax treatment	After-tax (no deduction now)	Pre-tax (lowers taxable income now)
Withdrawal tax treatment	Tax-free in retirement	Taxed as ordinary income in retirement
2026 contribution limit	$23,500 (under 50)	$23,500 (under 50)
Income limit to contribute	No income limit	No income limit
Required minimum distributions	Starts at 73 (rollover to Roth IRA can avoid this)	Starts at 73
Best fit	Expecting higher taxes later	Currently in peak earning years

Noah, our story-world guide

"When the math is close, a 50/50 split between Roth and traditional is a hedge against future tax uncertainty. Most plans let you direct your contribution percentage between the two."

Decision rule

When Roth 401(k) is the right call

You are early in your career and expect your income (and tax bracket) to climb
You expect to retire in a higher-tax state than New York (less common, but happens)
You want to hedge against future tax increases at the federal level
You already have significant pre-tax retirement savings and want tax diversity in retirement
You can comfortably pay the higher current tax bill without crowding out other goals

Decision rule

When traditional 401(k) is the right call

You are in your peak earning years with a high marginal tax rate
You expect to be in a lower tax bracket in retirement
The current tax deduction makes it possible to contribute meaningfully more
You are planning to retire to a lower-income-tax state
Cash flow today is tight and the immediate tax break matters

The expert take

Peter Guggisberg

Financial Advisor · Hudson Valley, NY

For a Hudson Valley household in the 24% or 32% federal bracket with a long commute and a mortgage, traditional usually wins on raw math. For a young family early in their career, Roth often wins because the current tax hit is small and the decades of tax-free growth compound powerfully. A 50/50 split between the two is a reasonable hedge when the decision is close, and most plans allow you to direct your contribution percentage between Roth and traditional.

Common questions

Asked about roth 401(k) vs traditional 401(k).

Can I contribute to both Roth and traditional in the same year?

Yes. Most 401(k) plans let you split your contribution between Roth and traditional, with the total counted against the annual limit ($23,500 in 2026 for under 50). Some families pick a 50/50 split as a hedge against future tax uncertainty.

What about the employer match?

The employer match is always traditional, regardless of whether your own contributions are Roth or traditional. That match enters a separate pre-tax bucket inside your 401(k).

Does the Roth 401(k) have income limits like the Roth IRA?

No. The Roth 401(k) has no income limit. You can contribute regardless of income, unlike the Roth IRA, which phases out at higher income levels.

What if I leave my job?

You can roll a Roth 401(k) into a Roth IRA and a traditional 401(k) into a traditional IRA. Rolling traditional into Roth is also possible but generates a taxable event the year of the conversion.

Are Roth withdrawals really tax-free?

Yes, as long as you are at least 59 and a half and the account has been open at least five years. Both conditions matter for the 'qualified distribution' tax-free status.

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