Is It Better to Have a 401(k) or a Roth IRA?

For most workers, the classic "401(k) vs. Roth IRA" debate is outdated. Today, the majority of employer 401(k) plans include a built-in Roth 401(k) option. That means you can usually get Roth-style tax-free growth and keep your 401(k)'s higher contribution limits and employer match — without ever opening a separate Roth IRA. The real decision most people need to make is Traditional 401(k) vs. Roth 401(k), which comes down to whether you'd rather pay taxes now or in retirement. Both have legitimate advantages, and the right choice depends on your income, tax bracket, and long-term goals. A fiduciary financial planner can help you run the numbers for your specific situation.

Is It Better to Have a 401(k) or a Roth IRA?

In most cases, this isn't actually the comparison you need to make. Nowadays, most 401(k) plans already include a Roth 401(k) option, which gives you the same tax-free growth and tax-free withdrawals as a Roth IRA — but with a higher annual contribution limit and, often, an employer match. Because of that, the more useful question for most people is whether to direct their 401(k) contributions to the Traditional (pre-tax) side or the Roth (after-tax) side, not whether to abandon their 401(k) for a Roth IRA.

That said, a Roth IRA can still make sense as a supplement to a 401(k) — for example, if you want more investment flexibility or you've already maxed out your 401(k) contributions for the year. But for the majority of employees, the first step isn't opening a Roth IRA. It's checking what your existing 401(k) already offers.

Why "401(k) vs. Roth IRA" Isn't the Right Comparison Anymore

Retirement plans have changed a lot over the past decade. Roth 401(k) options used to be rare; now they're standard. According to plan-provider data, the large majority of employer-sponsored 401(k) plans in the U.S. now offer a Roth contribution option alongside the traditional pre-tax option.

That shift matters because it removes the need to trade off between two very different account types just to get Roth-style tax treatment. With a Roth 401(k), you get:

• Tax-free growth, just like a Roth IRA
• Tax-free qualified withdrawals in retirement
• Higher annual contribution limits than a Roth IRA
• No income limits restricting who can contribute (unlike a Roth IRA)
• The same employer match as your Traditional 401(k), typically deposited pre-tax

That last point is worth pausing on: even if you contribute 100% to the Roth side of your 401(k), most employer matching contributions still go into a pre-tax bucket. So your 401(k) can end up with both pre-tax and Roth money in it, which is a form of built-in tax diversification.

Check Your Plan First

Before assuming you need a Roth IRA to get Roth-style benefits, log into your 401(k) provider's portal or ask your HR or benefits team one simple question: "Does our 401(k) plan offer a Roth contribution option?" Given how common this feature has become, it's likely the answer is yes. If it is, the more relevant decision is the one below.

The Real Question: Traditional 401(k) or Roth 401(k)?

Once you know your plan offers both options, the decision comes down to taxes: do you want a tax break now, or tax-free income later? Here's an unbiased look at both.

What Is a Traditional 401(k)?

A Traditional 401(k) uses pre-tax contributions. Money comes out of your paycheck before income tax is applied, lowering your taxable income today. Growth is tax-deferred, and you pay ordinary income tax when you withdraw the money in retirement.

Pros:

• Lowers your taxable income in the year you contribute
• Can be valuable if you're currently in a higher tax bracket than you expect to be in retirement
• Frees up more cash flow today since your paycheck is taxed less
• Required Minimum Distributions (RMDs) can be reduced or eliminated through planning strategies later in life

Cons:

• You'll owe income tax on every dollar withdrawn in retirement, including growth
• Withdrawals count as taxable income, which can affect things like Medicare premiums or Social Security taxation
• Subject to RMDs starting at the IRS-required age, whether you need the income or not
• If tax rates rise in the future, you could end up paying more tax than expected

What Is a Roth 401(k)?

A Roth 401(k) uses after-tax contributions. You pay income tax on the money now, but qualified withdrawals in retirement — including all investment growth — are completely tax-free.

Pros:

• Tax-free withdrawals in retirement, including decades of growth
• Protects you against the risk of higher tax rates in the future
• Can be a strong option if you're early in your career and currently in a lower tax bracket
• Provides tax diversification alongside other pre-tax accounts

Cons:

• No upfront tax break, so your paycheck is taxed more heavily today
• If you're currently in a high tax bracket, you may be paying more tax now than you would in retirement
• Still subject to RMDs in a 401(k) (unlike a Roth IRA, which has no RMDs during the original owner's lifetime)
• Less beneficial if your income — and tax rate — drops significantly in retirement

Which One Is Right for You?

There's no universal answer, and anyone who tells you otherwise isn't giving you the full picture. Broadly speaking:

• If you expect to be in a lower tax bracket in retirement than you are now, a Traditional 401(k) may make more sense.
• If you expect to be in the same or higher tax bracket in retirement, a Roth 401(k) may make more sense.

Your decision should also factor in your current cash flow needs, other retirement accounts you hold, expected Social Security income, and your broader financial plan.

Talk to a Fiduciary Financial Planner

Because this decision affects your taxes for decades, it's worth discussing with a fiduciary financial planner who can look at your full financial picture — not just your 401(k) — before making a recommendation. At Oak Road Wealth Management, we work with clients in Lee's Summit, Missouri, and nationwide to build retirement strategies built around their actual goals, not a one-size-fits-all rule of thumb. If you're weighing Traditional vs. Roth contributions, we're happy to help you think it through.

Frequently Asked Questions

Is it better to have a 401(k) or a Roth IRA?

For most people, this isn't the real decision anymore. Most 401(k) plans now offer a Roth contribution option, so you can get Roth-style tax-free growth directly inside your 401(k). The more relevant question is usually Traditional 401(k) vs. Roth 401(k), not 401(k) vs. Roth IRA.

How do I know if my 401(k) plan offers a Roth option?

Check your 401(k) provider's online portal, review your plan documents, or ask your HR or benefits department. Roth 401(k) options are now common, so it's likely your plan already includes one.

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

Yes. Many plans let you split contributions between Traditional and Roth within the same 401(k), which can provide tax diversification without needing a separate account.

Can I contribute to a 401(k) and a Roth IRA at the same time?

Yes, as long as you meet the Roth IRA income limits. Contributing to both can add flexibility, but for many people, maximizing the 401(k) — including its Roth option — is the more efficient first step, since it typically allows for a much higher annual contribution.

Does Oak Road Wealth Management work with clients outside of Missouri?

Yes. While Oak Road Wealth Management is based in Lee's Summit, Missouri, we serve clients nationally as a fiduciary financial planning firm.

Should I decide this on my own or work with a financial planner?

While you can make a reasonable choice based on general guidelines, taxes, income changes, and retirement goals are highly individual. A fiduciary financial planner can help you weigh the pros and cons of pre-tax and Roth contributions based on your specific numbers, not general assumptions.

Written by Andrew Matz, Financial Planner at Oak Road Wealth Management.